Standard eighth (1/8) brick size
High power density
Full digital control
Compatible with DOSA second 1/8 brick digital connector
PMBus communication
Graphical user interface (GUI) software supported
Delayed hiccup overcurrent protection (OCP), overtemperature protection (OTP), overvoltage protection (OVP), and undervoltage lockout (UVLO)
Input voltage range: 36 V to 75 V
Output voltage: 12 V
Maximum output current: 20 A
Efficiency: typical 94.5% at full load
48 V telecom dc to dc power supply
Servers
Telecommunications systems
The eighth (1/8) brick power module is designed based on the standardized 1/8 brick format defined by the Distributed-power Open Systems Alliance (DOSA). This reference design implements the ADP1051, a digital controller for isolated power supply with PMBus Interface, to control the energy conversion from input to output. Because of the excellent performance of the ADP1051, this 1/8 brick power module achieves high reliability, efficiency, and integration.
This 1/8 brick power module offers a series of housekeeping functions, such as IOUT_OC, VOUT_OV, OT, VOUT_UV defined by PMBus, input UVLO, reverse current protection, short-circuit protection, and so forth.
Figure 1. Eighth Brick Power Module
Table 1.
Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions |
---|---|---|---|---|---|---|
Input Voltage | VIN | 36 | 48 | 75 | V dc | |
Turn On Input Voltage | VION | 34 | V dc | |||
Turn Off Input Voltage | VIOFF | 32 | V dc | |||
Output Voltage Initial Setting | VOI | 12 | V dc | VIN = 48 V and IO = 20 A | ||
OVP | 14 | V dc | ||||
Output Voltage Ripple | 120 | mV | ||||
Load Current | IO | 20 | A | |||
Load Current Limit Threshold | 22 | A | ||||
Operation Temperature | 25 | 85 | ºC | Airflow = 200 LFM or higher | ||
OT | 114 | ºC | ||||
Efficiency | η | 94.5 | % | VIN = 48 V and IO = 20 A | ||
Switching Frequency | fSW | 223 | kHz | |||
External Capacitance | 330 | 10,000 | μF |
Table 2.
Terminal | Name | Description |
---|---|---|
JP1 | VIN+ | Input terminal for input power. |
JP3 | VIN− | Ground for input power. |
JP4 | VOUT+ | Positive terminal of output power. |
JP8 | VOUT− | Negative terminal of output power. |
JP7 | ON/OFF | Control pin of the 1/8 brick. Negative logic. |
JP10.5 | VOUT− | Negative sensing point. Connect to VOUT−. |
JP10.6 | NC | Not connected. |
JP10.7 | VSENS+ | Positive sensing point. |
JP10.9 | NC | Not connected. |
JP10.10 | AGND | Ground for control circuit. |
JP10.11 | SDA | Data bus of the PMBus interface. |
JP10.12 | PG | Power-good signal pin. This pin (low level voltage) indicates that the unit is functioning abnormally. Open-drain ouput. |
JP10.13 | SCL | Clock bus of the PMBus interface. |
JP10.14 | 10V_SEC | 10 V auxiliary power on the output side. |
JP10.15 | ADD | Address selection pin. Follow the specification listed in the ADP1051 data sheet. |
The following equipment is required to complete the test procedure:
Figure 4. Eighth Brick Power Module Recommended Setup
Figure 5. Outlook of the Eighth Brick Power Module (Top View, Not to Size)
Figure 6. Outlook of the Eighth Brick Power Module (Bottom View, Not to Size)
Use the following steps to conduct the test procedure:
Figure 7. Schematic
Table 3. Bill of Materials
Quantity | Part Reference | Part No. | Value | Description | Manufacturer | Package |
---|---|---|---|---|---|---|
5 | C1, C2, C3, C4, C36 | 12061Z475KAT2A | 4.7 µF | 4.7 µF/100 V X7S MLCC | AVX | C1206 |
1 | C5 | C0402C101J1GACTU | 100 pF | 100 pF/100 V COG MLCC | Kemet | C0402 |
1 | C6 | GRM188R72A104KA35 | 100 nF | 100 nF/100 V X7R MLCC | Murata | C0603 |
6 | C7, C8, C9, C11, C46, C51 | C1005X7R1C104KT | 100 nF | 100 nF/16 V X7R MLCC | TDK | C0402 |
6 | C10, C14, C15, C18, C29, C49 | C1608X7R1C105KT | 1 µF | 1 µF/16 V X7R MLCC | TDK | C0603 |
1 | C12 | C1005C0G1H101JT | 100 pF | 100 pF/50 V COG MLCC | TDK | C0402 |
3 | C16, C20, C30 | C3216X7R1C106KT | 10 µF | 10 µF/16 V X7R MLCC | TDK | C1206 |
3 | C17, C19, C25 | C3225X7R1C226K250AC | 22 µF | 22 µF/16V X7R MLCC | TDK | C1210 |
2 | C21, C22 | GRM15XR71C472KA86 | 4.7 nF | 4.7 nF/16 V X7R MLCC | Murata | C0402 |
2 | C23, C24 | C0603C333K1RACTU | 33 nF | 33 nF/100 V X7R MLCC | Kemet | C0603 |
1 | C26 | C1005X7S0J225K050BC | 2.2 µF | 2.2 µF/6.3 V X7S MLCC | TDK | C0402 |
1 | C27 | C1005X7S0J474K050BB | 470 nF | 470 nF/6.3 V X7S MLCC | TDK | C0402 |
1 | C28 | NC | NC | MLCC | TDK | C0402 |
1 | C32 | GRM155R72A102KA01 | 1 nF | 1 nF/100 V X7R MLCC | Murata | C0402 |
2 | C34, C35 | GRM155R71H103KA88 | 10 nF | 10 nF/50 V X7R MLCC | Murata | C0402 |
2 | C43, C48 | C1608X6S1C475K080AC | 4.7 µF | 4.7 µF/16V X6S MLCC | TDK | C0603 |
1 | C47 | GRM155R71A683KA01 | 68 nF | 68 nF/10 V X7R MLCC | Murata | C0402 |
1 | C50 | GRM155R71H821KA01 | 820 pF | 820 pF/50 V X7R MLCC | Murata | C0402 |
1 | C52 | 202R18W102KV4E | 1000 pF | 1000 pF/2000 V X7R MLCC | Johanson Dielectrics, Inc. | C1206 |
1 | C53 | C1005X7R1H221KT | 220 pF | 220 pF/50 V X7R MLCC | TDK | C0402 |
1 | C54 | GRM155R71H472KA01 | 2.2 nF | 2.2 nF/50 V X7R MLCC | Murata | C0402 |
2 | C59, C60 | C1005X7R1H102KT | 1 nF | 1 nF/50 V X7R MLCC | TDK | C0402 |
1 | C117 | GRM155R70J105KA12 | 1 µF | 1 µF/6.3 V X7R MLCC | Murata | C0402 |
4 | D1, D2, D27, D28 | BAS516 | BAS516 | 100 V/0.25 A high speed diode | NXP | SOD523 |
1 | D3 | PMEG2010AEB | PMEG2010AEB | 20 V/1 A ultralow VF MEGA Schottky diode | NXP | SOD523 |
1 | D18 | BZX585-B5V1 | BZX585-B5V1 | 5.1 V Zener diode, 2% | NXP | SOD523 |
2 | D21, D23 | MUH1PB | MUH1PB | 100 V/1 A ultrafast diode | Vishay | MicroSMP |
2 | D25, D26 | XBS053V15R | XBS053V15R | 30 V/0.5 A Schottky diode | TOREX | SOD523 |
1 | JP1 | VIN+ | Pin | |||
1 | JP3 | VIN- | Pin | |||
1 | JP4 | VOUT+ | Pin | |||
1 | JP7 | ON/OFF | Pin | |||
1 | JP8 | VOUT- | Pin | |||
1 | JP9 | SHORTPIN | Pin | |||
1 | JP10 | Pin Connector | ||||
1 | L1 | SPM5030-R20M | 0.20 µH | 0.20 µH/21 A inductor | TDK | 5.2 mm × 5.0 mm × 3 mm |
2 | L3, T6 | PC95RM6 | PC95RM6 | Embeded inductor, total 10 mm height, 0.34 mm airgap | TDK | |
2 | M1, M5 | FDMS86350 | FDMS86350 | 80 V/2.4 mR/80 A power MOSFET | Fairchild | Power 56 |
4 | Q1, Q2, Q3, Q4 | FDMS86150 | FDMS86150 | 100 V/4.85 mR/60 A power MOSFET | Fairchild | Power 56 |
1 | Q5 | PEMZ1 | PEMZ1 | 50 V/0.1 A NPN/PNP general-purpose transistors | NXP | SOT666 |
2 | Q7, Q8 | Si2337DS | Si2337DS | 80 V/0.27 R/2.2 A P-channel power MOSFET | Vishay | SOT-23 |
4 | R2, R4, R6, R8 | RC0402JR-0710KL | 10 kΩ | 10 kΩ 0402 SMD 5% generic resistor | Yageo | R0402 |
5 | R15, R16, R52, R56, R64 | RC0402JR-075K1L | 5.1 kΩ | 5.1 kΩ 0402 SMD 5% generic resistor | Yageo | R0402 |
2 | R19, R20 | RC0603JR-070RL | 0 Ω | 0 Ω 0603 SMD 5% generic resistor | Yageo | R0603 |
1 | R21 | CSNL1206FT1L00 | 0.001 Ω | 1 mΩ 1206 SMD 1% current sensing resistor | Stackpole Electronics, Inc. | R1206 |
1 | R23 | RC0402JR-070R0L | 0 Ω | 0 Ω 0402 SMD generic resistor | Yageo | R0402 |
1 | R24 | RC0402FR-0711KL | 11 kΩ | 11 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R26 | RC0402FR-0723K2L | 23.2 kΩ | 23.2 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
4 | R27, R36, R39, R40 | RC0402JR-0712K2L | 2.2 kΩ | 2.2 kΩ 0402 SMD 5% generic resistor | Yageo | R0402 |
2 | R28, R31 | PCF0402R4K99BT1 | 4.99 kΩ | 4.99 kΩ 0402 SMD 0.1% ultraprecision resistor | Welwyn | R0402 |
1 | R29 | RC0402FR-0723K7L | 23.7 kΩ | 23.7 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R30 | RC0402FR-071R3L | 1.3 Ω | 1.3 Ω 0402 SMD 1% generic resistor | Yageo | R0402 |
2 | R32, R33 | RC0402FR-071KL | 1 kΩ | 1 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
2 | R34, R80 | RC0402JR-07680RL | 680 Ω | 680 Ω 0402 SMD 5% generic resistor | Yageo | R0402 |
1 | R35 | RE0402DRE0711KL | 11 kΩ | 11 kΩ 0402 SMD 0.5% generic resistor | Yageo | R0402 |
1 | R37 | RE0402DRE071KL | 1 kΩ | 1 kΩ 0402 SMD 0.5% generic resistor | Yageo | R0402 |
3 | R38, R47, R55 | RC0402JR-071KL | 1 kΩ | 1 kΩ 0402 SMD 5% generic resistor | Yageo | R0402 |
1 | R42 | PCF0402R10K0BT1 | 10 kΩ | 10 kΩ 0402 SMD 0.1% ultraprecision resistor | Welwyn | R0402 |
1 | R43 | RC0402FR-0716K5L | 16.5 kΩ | 16.5 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R46 | RC0402FR-078220KL | 220 kΩ | 220 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R49 | RC0402FR-0710KL | 10 kΩ | 10 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
3 | R50, R54, R84, | RC0402FR-07149K9L | 49.9 kΩ | 49.9 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R51 | RC0402FR-078K2L | 8.2 kΩ | 8.2 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R53 | RC0402FR-075K1L | 5.1 kΩ | 5.1 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
2 | R78, R81 | RC0402FR-07374KL | 374 kΩ | 374 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R79 | RC0402FR-0715KL | 15 kΩ | 15 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R82 | RC0402FR-074K64L | 4.64 kΩ | 4.64 kΩ0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R83 | RC0402FR-072K49L | 2.49 kΩ | 2.49 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R85 | RC0402FR-0751RL | 51 Ω | 51 Ω 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | R86 | RC0402FR-071K5L | 1.5 kΩ | 1.5 kΩ 0402 SMD 1% generic resistor | Yageo | R0402 |
1 | RT1 | NCP15WF104F03RC | 100 kΩ | 100 kΩ 0402 SMD NTC resistor | Murata | R0402 |
1 | T1 | MA5401-AE | MA5401-AE | Flyback/buck transformer, 1:1 | Coilcraft | SMT |
1 | T4 | CU8965-AL | CU8965-AL | 1:100 20 A CT, 1500VDC insulation voltage | Coilcraft | SMT |
2 | U1, U4 | UCC27211DRM | UCC27211 | 120 V/4 A high-side and low-side gate driver | Texas Instruments | SON-8 |
1 | U2 | ADuM3210TRZ | ADuM3210 | Dual-channel digital isolator, 2 inputs | Analog Devices, Inc. | SOIC_N |
2 | U3, U5 | ADP3654ARHZRL | ADP3654 | Dual 4 A MOSFET driver | Analog Devices | MINI_SO_EP |
1 | U6 | UCC25230DRMT | UCC25230 | 12 V to 100 V input, 0.2 A output switching converter | Texas Instruments | SON-8 |
1 | U7 | PS2911-1 | PS2911-1 | 4-pin, ultrasmall package, flat lead optocoupler | NEC | 4.6 mm × 2.5 mm × 2.1 mm |
1 | U8 | MIC5213-3.3YC5 | MIC5213-3.3YC5 | 0.08 A/3.3 V LDO | Micrel | SC70-5 |
1 | U9 | TL431AQDCKT | TL431AQDCKT | VREF = 2.5 V; 1% | Texas Instruments | SC70 |
1 | U11 | ADP1051ACPZ | ADP1051 | Digital controller | Analog Devices, Inc. | LFCSP |
Figure 8. Top Layer
Figure 9. Layer 2
Figure 10. Layer 3
Figure 11. Layer 4
Figure 12. Layer 5
Figure 13. Layer 6
Figure 14. Layer 7
Figure 15. Layer 8
Figure 16. Layer 9
Figure 17. Layer 10
Figure 18. Layer 11
Figure 19. Layer 12
Figure 20. Layer 13
Figure 21. Layer 14
Figure 22. Layer 15
Figure 23. Bottom Layer
The specification in the test form is defined under 25°C and pass/fail is according to the specification. The characterizations derived using the following equipment:
Table 4. Input Characteristics
Test Item | Specification | Result |
---|---|---|
Efficiency | >94.5% when VIN = 48 V and IO = 20 A | Pass |
>94.5% when VIN = 48 V and IO = 10 A | Pass | |
>91.5% VIN = 48 V and IO = 6 A | Pass | |
Maximum Input Current | <10 A when VIN = 36 V and IO = 20 A | Pass |
Input Idling Power | <4 W when VIN = 48 V and IO = 0 A |
Table 5. Output Characterization
Test Item | Specification | Result |
---|---|---|
Output Voltage Setpoint | 11.88 V to 12.12 V | Pass |
Output Voltage Range | 11.64 V to 12.36 V with VIN = 40 V to 75 V and IO = 0 A to 20 A | Pass |
Line Regulation | <±2% with VIN = 40 V to 75 V and IO = 20 A | Pass |
Load Regulation | <±3% with VIN = 48 V and IO = 0 A to 20 A | Pass |
Output Ripple and Noise | <250 mV with 20 MHz bandwidth, VIN = 36 V to 75 V and IO = 0 A to 20 A | |
<500 mV with 1 GHz bandwidth, VIN = 48 V and IO = 20 A | ||
Dynamic Load Response | ΔVO < 600 mV and TSET < 200 µs with IO changes at a step of 10 A, 15 A, 10 A and a speed of 0.1 A/µs | Pass |
ΔVO < 600 mV and TSET < 300 µs with IO changes at a step of 10 A, 15 A, 10 A and a speed of 1 A/µs | Pass | |
ΔVO < 600 mV and TSET < 200 µs with IO changes at a step of 2 A, 20 A, 2 A and a speed of 0.1 A/µs | Pass | |
Turn-On Transient | TDSTART < 100 ms,TSTART < 100 ms, and ΔVOSHOOT < 5% VO with VIN = 36 V to 75 V and IO = 0 A to 20 A | Pass |
Turn-Off Transient | Not specified | Pass |
Table 6. Protection
Test Item | Specification | Result |
---|---|---|
Input Undervoltage Protection | Turns on the unit with VIN = 31 V to 35.5 V | Pass |
Turns off the unit with VIN = 30 V to 35 V | Pass | |
Hysteresis between turn on and turn off should be higher than 1 V | Pass | |
Output Overvoltage Protection (OVP) | Enable hiccup mode when VO triggers the OVP setting point within 14 V to 16 V with VIN = 48 V | Pass |
Output Overcurrent Protection (OVC) | Enable hiccup mode when IO triggers the OCP setting point within 22 A to 28 A with VIN = 36 V to 75 V | Pass |
Output Short-Circuit Protection | Ensure IO < 5 A and the output can be shorting continuously with enable hiccup mode | Pass |
Overtemperature Protection (OTP) | Pass |
Table 7. Monitoring
Test Item | Specification | Result |
---|---|---|
Input Voltage Detected Precision | < ±1 V with VIN = 36 V to 75 V, IO = 0 A to 20 A | Pass |
Input Current Detected Precision | < ±0.5 A with VIN = 36 V to 75 V, IO = 0 A to 20 A | |
Input Power Detected Precision | < ±12 W with VIN = 36 V to 75 V, IO = 5 A to 20 A | |
Output Voltage Detected Precision | < ±0.2 V with VIN = 36 V to 75 V, IO = 0 A to 20 A | Pass |
Output Current Detected Precision | < ±1 A with VIN = 36 V to 75 V, IO = 0 A to 20 A | Pass |
Output Power Detected Precision | < ±1 W with VIN = 36 V to 75 V, IO = 0 A to 20 A | Pass |
Board Thermal |
Input characterization data is available in Table 4.
The unit operates under full input voltage and load range. Efficiency was measured or computed after warming up for a minimum of 10 minutes.
With VIN = 48 V and VO = 12 V, η > 94% when IO = 20 A.
Test result: Pass
Table 8. Efficiency
Specification (%) | Test Results (%) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
Efficiency | 48 | 20 | >94 | 94.468 |
Figure 24. Eighth Brick Efficiency, ADP5051
Table 9.
VIN (V) | IIN (A) | VO (V) | IO (A) | η (%) | VIN (V) | IIN (A) | VO (V) | IO (A) | η (%) |
---|---|---|---|---|---|---|---|---|---|
36.009 | 0.110 | 12.010 | 0.000 | 0.000 | 48.018 | 0.105 | 12.012 | 0.000 | 0.000 |
35.988 | 0.433 | 12.009 | 0.968 | 74.527 | 48.001 | 0.346 | 12.012 | 0.967 | 69.849 |
35.966 | 0.768 | 12.009 | 1.959 | 85.228 | 47.983 | 0.597 | 12.012 | 1.958 | 82.138 |
35.943 | 1.117 | 12.009 | 2.983 | 89.269 | 47.967 | 0.858 | 12.012 | 2.983 | 87.077 |
35.920 | 1.457 | 12.008 | 3.973 | 91.147 | 47.950 | 1.111 | 12.010 | 3.973 | 89.588 |
35.896 | 1.801 | 12.008 | 4.967 | 92.268 | 47.932 | 1.367 | 12.010 | 4.967 | 91.008 |
35.870 | 2.159 | 12.008 | 5.994 | 92.942 | 47.913 | 1.635 | 12.009 | 5.994 | 91.882 |
35.847 | 2.508 | 12.007 | 6.987 | 93.326 | 47.898 | 1.897 | 12.009 | 6.983 | 92.290 |
35.822 | 2.849 | 12.006 | 7.976 | 93.849 | 47.880 | 2.159 | 12.008 | 7.976 | 92.653 |
35.799 | 3.205 | 12.007 | 9.002 | 94.206 | 47.859 | 2.427 | 12.008 | 9.002 | 93.045 |
35.776 | 3.549 | 12.006 | 9.994 | 94.502 | 47.844 | 2.686 | 12.008 | 9.994 | 93.389 |
35.752 | 3.883 | 12.005 | 10.953 | 94.707 | 47.826 | 2.934 | 12.006 | 10.953 | 93.708 |
35.725 | 4.246 | 12.005 | 11.981 | 94.832 | 47.805 | 3.203 | 12.007 | 11.981 | 93.962 |
35.700 | 4.592 | 12.004 | 12.967 | 94.952 | 47.790 | 3.462 | 12.005 | 12.967 | 94.102 |
35.673 | 4.944 | 12.004 | 13.963 | 95.041 | 47.772 | 3.721 | 12.002 | 13.963 | 94.278 |
35.645 | 5.309 | 12.004 | 14.988 | 95.077 | 47.753 | 3.991 | 12.001 | 14.990 | 94.390 |
35.618 | 5.664 | 12.003 | 15.982 | 95.089 | 47.732 | 4.253 | 12.000 | 15.982 | 94.466 |
35.589 | 6.020 | 12.002 | 16.976 | 95.099 | 47.715 | 4.517 | 11.999 | 16.974 | 94.490 |
35.568 | 6.393 | 12.000 | 18.000 | 94.993 | 47.696 | 4.791 | 11.999 | 17.998 | 94.510 |
35.532 | 6.752 | 11.999 | 18.990 | 94.977 | 47.675 | 5.057 | 11.996 | 18.991 | 94.503 |
35.505 | 7.115 | 11.997 | 19.983 | 94.901 | 47.656 | 5.324 | 11.993 | 19.985 | 94.468 |
60.030 | 0.104 | 12.010 | 0.000 | 0.000 | 75.040 | 0.095 | 12.006 | 0.000 | 0.000 |
60.010 | 0.292 | 12.009 | 0.964 | 66.068 | 75.030 | 0.245 | 12.006 | 0.964 | 62.968 |
60.000 | 0.490 | 12.008 | 1.956 | 79.906 | 75.020 | 0.405 | 12.006 | 1.958 | 77.447 |
59.980 | 0.698 | 12.008 | 2.981 | 85.543 | 75.000 | 0.571 | 12.005 | 2.981 | 83.571 |
59.980 | 0.901 | 12.007 | 3.971 | 88.242 | 74.990 | 0.734 | 12.005 | 3.973 | 86.702 |
59.960 | 1.107 | 12.009 | 4.963 | 89.811 | 74.980 | 0.898 | 12.005 | 4.965 | 88.484 |
59.940 | 1.321 | 12.008 | 5.988 | 90.775 | 74.970 | 1.071 | 12.005 | 5.993 | 89.630 |
59.930 | 1.531 | 12.007 | 6.979 | 91.325 | 74.960 | 1.238 | 12.003 | 6.971 | 90.130 |
59.910 | 1.742 | 12.005 | 7.971 | 91.687 | 74.950 | 1.408 | 12.002 | 7.973 | 90.672 |
59.900 | 1.961 | 12.004 | 8.996 | 91.935 | 74.930 | 1.585 | 12.001 | 9.000 | 90.938 |
59.880 | 2.169 | 12.003 | 9.991 | 92.312 | 74.920 | 1.756 | 11.999 | 9.994 | 91.159 |
59.870 | 2.369 | 12.002 | 10.950 | 92.680 | 74.910 | 1.917 | 11.998 | 10.953 | 91.532 |
59.860 | 2.582 | 12.001 | 11.973 | 92.981 | 74.900 | 2.087 | 11.996 | 11.977 | 91.900 |
59.850 | 2.788 | 12.000 | 12.963 | 93.218 | 74.890 | 2.253 | 11.994 | 12.967 | 92.193 |
59.830 | 2.996 | 12.000 | 13.959 | 93.452 | 74.880 | 2.419 | 11.994 | 13.961 | 92.429 |
59.810 | 3.210 | 11.997 | 14.985 | 93.626 | 74.870 | 2.591 | 11.991 | 14.988 | 92.653 |
59.800 | 3.420 | 11.997 | 15.978 | 93.736 | 74.860 | 2.758 | 11.990 | 15.980 | 92.791 |
59.780 | 3.630 | 11.994 | 16.972 | 93.815 | 74.850 | 2.926 | 11.988 | 16.972 | 92.906 |
59.770 | 3.847 | 11.992 | 17.996 | 93.849 | 74.830 | 3.100 | 11.987 | 17.996 | 92.996 |
59.750 | 4.059 | 11.992 | 18.988 | 93.887 | 74.820 | 3.270 | 11.985 | 18.990 | 93.030 |
59.730 | 4.272 | 11.990 | 19.981 | 93.900 | 74.810 | 3.440 | 11.981 | 19.983 | 93.038 |
The unit was set at maximum load and the input voltage was set to the minimum value.
With IIN = 10 A when VIN = 36 V and IO = 20 A.
Test result: Pass
Table 10. Maximum Input Current
Specification (A) | Test Results (A) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
IIN | <36 | 20 | <10 | <10 | <10 | 7.115 |
The unit was set at no load with rated input voltage.
Pin <4 W when VIN = 48 V and IO = 0 A.
Test result:
Table 11. Input Idling Power
Specification (W) | Test Results (W) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
PO | <36 | 0 | Not specified | 3.957 | ||||
PO | 48 | 0 | <4 | 5.018 | ||||
PO | 60 | 0 | Not specified | 6.243 | ||||
PO | 75 | 0 | Not specified | 7.091 |
The test items summary for Output Characterization specifications is available in Table 4.
The unit was set at full load with rated input voltage.
11.88 V < VO < 12.12 V when VIN = 48 V and IO = 20 A.
Test result: Pass
Table 12. Output Voltage Setpoint
Specification (V) | Test Results (V) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
VO | 48 | 20 | 11.88 to 12.12 | 11.993 |
The unit was operating under full input voltage and load range.
11.64 V < VO < 12.36 V when VIN = 36 V to75 V and IO = 0 A to 20 A.
Test result: Pass
Table 13. Output Voltage Range
Specification (V) | Test Results (V) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
VO | 36 | 0 | 11.64 to 12.36 | 12.010 | ||||
VO | 36 | 20 | 11.64 to 12.36 | 11.997 | ||||
VO | 48 | 0 | 11.64 to 12.36 | 12.012 | ||||
VO | 48 | 20 | 11.64 to 12.36 | 11.993 | ||||
VO | 60 | 0 | 11.64 to 12.36 | 12.010 | ||||
VO | 60 | 20 | 11.64 to 12.36 | 11.990 | ||||
VO | 75 | 0 | 11.64 to 12.36 | 12.006 | ||||
VO | 75 | 20 | 11.64 to 12.36 | 11.981 |
The unit was operating under full input voltage range and maximum load.
11.76 V < VO < 12.24 V when VIN = 36 V to 75 V and IO = 20 A.
Test result: Pass
Table 14. Line Regulation
Specification (V) | Test Results (V) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
VO | 36 | 20 | 11.64 to 12.36 | 11.997 | ||||
VO | 48 | 20 | 11.64 to 12.36 | 11.993 | ||||
VO | 60 | 20 | 11.64 to 12.36 | 11.990 | ||||
VO | 75 | 20 | 11.64 to 12.36 | 11.981 |
Figure 25. Eighth Brick Line Regulation
The unit was operating under rated input voltage range and full load range.
11.64 V < VO < 12.36 V when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Table 15. Load Regulation
Specification (V) | Test Results (V) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
VO | 36 | 0 | 11.64 to 12.36 | 12.01 | ||||
VO | 36 | 2 | 11.64 to 12.36 | 12.009 | ||||
VO | 36 | 4 | 11.64 to 12.36 | 12.008 | ||||
VO | 36 | 6 | 11.64 to 12.36 | 12.008 | ||||
VO | 36 | 8 | 11.64 to 12.36 | 12.006 | ||||
VO | 36 | 10 | 11.64 to 12.36 | 12.006 | ||||
VO | 36 | 12 | 11.64 to 12.36 | 12.005 | ||||
VO | 36 | 14 | 11.64 to 12.36 | 12.004 | ||||
VO | 36 | 16 | 11.64 to 12.36 | 12.003 | ||||
VO | 36 | 18 | 11.64 to 12.36 | 12.000 | ||||
VO | 36 | 20 | 11.64 to 12.36 | 11.997 | ||||
VO | 48 | 0 | 11.64 to 12.36 | 12.012 | ||||
VO | 48 | 2 | 11.64 to 12.36 | 12.012 | ||||
VO | 48 | 4 | 11.64 to 12.36 | 12.010 | ||||
VO | 48 | 6 | 11.64 to 12.36 | 12.009 | ||||
VO | 48 | 8 | 11.64 to 12.36 | 12.008 | ||||
VO | 48 | 10 | 11.64 to 12.36 | 12.008 | ||||
VO | 48 | 12 | 11.64 to 12.36 | 12.007 | ||||
VO | 48 | 14 | 11.64 to 12.36 | 12.002 | ||||
VO | 48 | 16 | 11.64 to 12.36 | 12.001 | ||||
VO | 48 | 18 | 11.64 to 12.36 | 11.999 | ||||
VO | 48 | 20 | 11.64 to 12.36 | 11.993 | ||||
VO | 60 | 0 | 11.64 to 12.36 | 12.010 | ||||
VO | 60 | 2 | 11.64 to 12.36 | 12.008 | ||||
VO | 60 | 4 | 11.64 to 12.36 | 12.007 | ||||
VO | 60 | 6 | 11.64 to 12.36 | 12.008 | ||||
VO | 60 | 8 | 11.64 to 12.36 | 12.005 | ||||
VO | 60 | 10 | 11.64 to 12.36 | 12.003 | ||||
VO | 60 | 12 | 11.64 to 12.36 | 12.002 | ||||
VO | 60 | 14 | 11.64 to 12.36 | 12.000 | ||||
VO | 60 | 16 | 11.64 to 12.36 | 11.997 | ||||
VO | 60 | 18 | 11.64 to 12.36 | 11.994 | ||||
VO | 60 | 20 | 11.64 to 12.36 | 11.992 | ||||
VO | 75 | 0 | 11.64 to 12.36 | 12.006 | ||||
VO | 75 | 2 | 11.64 to 12.36 | 12.006 | ||||
VO | 75 | 4 | 11.64 to 12.36 | 12.005 | ||||
VO | 75 | 6 | 11.64 to 12.36 | 12.005 | ||||
VO | 75 | 8 | 11.64 to 12.36 | 12.002 | ||||
VO | 75 | 10 | 11.64 to 12.36 | 11.999 | ||||
VO | 75 | 12 | 11.64 to 12.36 | 11.996 | ||||
VO | 75 | 14 | 11.64 to 12.36 | 11.994 | ||||
VO | 75 | 16 | 11.64 to 12.36 | 11.990 | ||||
VO | 75 | 18 | 11.64 to 12.36 | 11.987 | ||||
VO | 75 | 20 | 11.64 to 12.36 | 11.981 |
Figure 26. Eighth Brick Load Regulation
Apply a CR load at the output terminals and decrease the loaded resistor.
Load current should limit under the IOUT_OC_LIMIT.
Figure 27. Eighth Brick Constant Current Mode
Ripple voltage and noise were measured at the pins of the mating connector of which each output was decoupled by a ceramic (X7R) capacitor and an aluminum capacitor, as shown in following figure.
Figure 28. Decoupled Eighth Brick Power Module
VO p-p < 250 mV with 20 MHz signal bandwidth when VIN = 36 V to 75 V and IO = 0 A to 20 A; VO p-p < 500 mV with 1 GHz signal bandwidth when VIN = 48 V and IO = 20 A.
Test result: Pass
Table 16. Output Ripple and Noise
Specification (V) | Test Results (V) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
VO p-p with 20 MHz Bandwidth | 36 | 0 | <250 | <250 | <250 | 58 | ||
VO p-p with 20 MHz Bandwidth | 48 | 0 | <250 | <250 | <250 | 92 | ||
VO p-p with 20 MHz Bandwidth | 60 | 0 | <250 | <250 | <250 | 120 | ||
VO p-p with 20 MHz Bandwidth | 75 | 0 | <250 | <250 | <250 | 126 | ||
VO p-p with 20 MHz Bandwidth | 36 | 20 | <250 | <250 | <250 | 58 | ||
VO p-p with 20 MHz Bandwidth | 48 | 20 | <250 | <250 | <250 | 86 | ||
VO p-p with 20 MHz Bandwidth | 60 | 20 | <250 | <250 | <250 | 104 | ||
VO p-p with 20 MHz Bandwidth | 75 | 20 | <250 | <250 | <250 | 122 | ||
VO p-p with 500 MHz Bandwidth | 48 | 20 | <500 | 110 |
Channel 1: VO AC-Coupled
500 MHz Signal Bandwidth when VIN = 48 V
The dynamic load response was evaluated by measuring the overshoot/undershoot (ΔVO) and the settling time (TSET) with load changes at the specified step and speed in full input voltage range.
ΔVO < 600 mV and TSET < 200 µs when Io changes at a step of 10 A, 15 A,10 A and a speed of 0.1 A/µs; ΔVO < 600 mV and TSET < 300 µs when Io changes at a step of 10 A, 15 A, 10 A and a speed of 1 A/µs; ΔVO < 600 mV when IO changes at a step of 2 A, 20 A, 2 A and a speed of 0.1 A/µs.
Test result: Pass
Table 17. Dynamic Load Response, Load Current Slew Rate is 0.1 A/µs
Specification (mV/µs) | Test Results (mV/µs) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (%) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
ΔVO/TSET | 36 | 50% to >75% | 600/200 | 222/74 | ||||
ΔVO/TSET | 36 | 75% to >50% | 600/200 | 234/77 | ||||
ΔVO/TSET | 48 | 50% to >75% | 600/200 | 222/125 | ||||
ΔVO/TSET | 48 | 75% to >50% | 600/200 | 222/115 | ||||
ΔVO/TSET | 60 | 50% to >75% | 600/200 | 226/126 | ||||
ΔVO/TSET | 60 | 75% to >50% | 600/200 | 214/133 | ||||
ΔVO/TSET | 75 | 50% to >75% | 600/200 | 222/115 | ||||
ΔVO/TSET | 75 | 75% to >50% | 600/200 | 210/132 |
Table 18. Dynamic Load Response, Load Current Slew Rate is 1 A/µs
Specification (mV/µs) | Test Results (mV/µs) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (%) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
ΔVO/TSET | 36 | 50% to >75% | 600/300 | 278/60 | ||||
ΔVO/TSET | 36 | 75% to >50% | 600/300 | 286/57 | ||||
ΔVO/TSET | 48 | 50% to >75% | 600/300 | 302/109 | ||||
ΔVO/TSET | 48 | 75% to >50% | 600/300 | 290/100 | ||||
ΔVO/TSET | 60 | 50% to >75% | 600/300 | 302/107 | ||||
ΔVO/TSET | 60 | 75% to >50% | 600/300 | 298/106 | ||||
ΔVO/TSET | 75 | 50% to >75% | 600/300 | 318/105 | ||||
ΔVO/TSET | 75 | 75% to >50% | 600/300 | 298/137 |
Table 19. Dynamic Load Response, Load Current Slew Rate is 0.1 A/µs
Specification (mV/µs) | Test Results (mV/µs) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (%) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
ΔVO/TSET | 36 | 10% to >100% | 600/not specified | 404/not specified | ||||
ΔVO/TSET | 36 | 100% to >10% | 600/not specified | 340/not specified | ||||
ΔVO/TSET | 48 | 10% to >100% | 600/not specified | 388/not specified | ||||
ΔVO/TSET | 48 | 100% to >10% | 600/not specified | 324/not specified | ||||
ΔVO/TSET | 60 | 10% to >100% | 600/not specified | 372/not specified | ||||
ΔVO/TSET | 60 | 100% to >10% | 600/not specified | 324/not specified | ||||
ΔVO/TSET | 75 | 10% to >100% | 600/not specified | 356/not specified | ||||
ΔVO/TSET | 75 | 100% to >10% | 600/not specified | 316/not specified |
Channel 1 (Blue): VO (AC-Coupled); Channel 4 (Green): IO Load Step = 10 A, 15 A, 10 A with a slew rate of 0.1 A/µs
Load Step: 10 A, 15 A, 10 A with a Slew Rate of 1 A/µs
The unit was tested when the input voltage is applied.
TDSTART (start delay time from when the VIN is applied to when the output voltage starts to ramp up) < 100 ms when VIN = 36 V to 75 V and IO = 0 A to 20 A; TSTART (start-up time when the output voltage increases from 0 V to 12 V) < 100 ms when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Table 20. Turn-On Transient, TDSTART
Specification (ms) | Test Results (ms) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
TDSTART | 36 | 0 | <100 | 13.4 | ||||
TDSTART | 36 | 20 | <100 | 13.4 | ||||
TDSTART | 48 | 0 | <100 | 12.5 | ||||
TDSTART | 48 | 20 | <100 | 12.9 | ||||
TDSTART | 60 | 0 | <100 | 13.1 | ||||
TDSTART | 60 | 20 | <100 | 12.8 | ||||
TDSTART | 75 | 0 | <100 | 12.8 | ||||
TDSTART | 75 | 20 | <100 | 12.5 |
TDSTART; Channel 1 (Blue): VO, Channel 2 (Cyan): VIN, Channel 4 (Green): IO
Table 21. Turn-On Transient, TSTART
Specification (ms) | Test Results (ms) |
|||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | -40°C | +25°C | +85°C | -40°C | +25°C | +85°C |
TSTART | 36 | 0 | <100 | 13.1 | ||||
TSTART | 36 | 20 | <100 | 13.1 | ||||
TSTART | 48 | 0 | <100 | 12.5 | ||||
TSTART | 48 | 20 | <100 | 12.2 | ||||
TSTART | 60 | 0 | <100 | 11.5 | ||||
TSTART | 60 | 20 | <100 | 11.5 | ||||
TSTART | 75 | 0 | <100 | 11.1 | ||||
TSTART | 75 | 20 | <100 | 11 |
TSTART Channel 1 (Blue): VO, Channel 2 (Cyan): VIN, Channel 4 (Green): IO
The unit is shut down for a while by the on/off pin and restarts.
No output voltage drop under such start condition.
Test result: Pass
Channel 1 (Blue): VO, Channel 3 (Purple): On/Off
The unit was tested when the input voltage is removed.
Output voltage drops with monotonic slew rate and no negative current when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Table 22. VO and IO at 36 V, 48 V, 60 V, and 75 V
Load (A) | Specification at -40°C, +25°C, and +85°C | Pass or Fail at 25°C |
---|---|---|
0 | Monotonic drop and no negative current | Pass |
20 | Monotonic drop and no negative current | Pass |
Channel 1 (Blue): VO, Channel 2 (Cyan): VIN, Channel 4 (Green): IO
See Table 5 for Protection specifications.
Adjust the input voltage and turn on and turn off the unit.
Turns on the unit when VIN = 31 V to 35.5 V and IO = 0 A to 20 A. Turns off the unit when VIN = 30 V to 35 V and IO = 0 A to 20 A. Hysteresis between turn on and turn off should be higher than 1 V.
Test result: Pass
Table 23. Input UVLO
Specification (V) | Test Results (V) | ||||||
---|---|---|---|---|---|---|---|
Item | Load (A) | −40°C | +25°C | +85°C | −40°C | +25°C | +85°C |
Turn-On Input Voltage | 0 and 20 | 31 to 35.5 | 34 | ||||
Turn-Off Input Voltage | 0 | 30 to 35 | 31.9 | ||||
Turn-Off Input Voltage | 20 | 30 to 35 | 32 | ||||
Hysteresis | 0 | >1 | 2.1 | ||||
Hysteresis | 20 | >1 | 2 |
Note that for auxiliary power turn-on input voltage, auxiliary power turn-off input voltage, and hysteresis, all specifications are not specified and test results are to be determined.
Set the VOUT_COMMAND to a value which exceeds the VOUT_OV_LIMIT.
The actual output voltage cannot exceed 15 V.
Test result: Pass
Table 24. OVP Setting Point with Enable Hiccup Mode (Y)
Specification (V) | Test Results (V) | |||||||
---|---|---|---|---|---|---|---|---|
Item | VIN (V) | Load (A) | −40°C | +25°C | +85°C | −40°C | +25°C | +85°C |
OVP with EHM (Y) | 48 | 0 | 15 | 14.5 | ||||
OVP with EHM (Y) | 48 | 20 | 15 | 14.3 |
Channel 1 (Blue): VO, Channel 4 (Green): IO
Apply a 23 A CC load at the output terminals.
The unit should be able to shut down the power conversion and restart after a certain time.
Test result: Pass
Channel 1 (Blue): VO, Channel 4 (Green): IO
A shorted load whose load current is up to 50 A is applied at the output terminals.
No device is damaged in this test. Testing at 36 V, 48 V, 60 V, and 75 V determined that IO and output can be shorting continuously (Y) with enable hiccup mode (Y) with no device damage specified at −40°C, +25°C, or +85°C; test results = pass for these voltage levels at 25°C.
Test result: Pass
Channel 1 (Blue): VO, Channel 4 (Green): IO
For full specifications listing, see Table 5.
Measure VIN within full input voltage and load range.
EVIN (error of VIN) < ±2 V when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Figure 101. Input Voltage Reading Error
Measure IIN within full input voltage and load range.
EIIN (error of IIN) < ±0.5 A when VIN = 36 V to 75 V and IO = 5 A to 20 A.
Test result: Pass
Figure 102. Input Current Reading Error
Measure PIN within full input voltage and load range.
EPIN (error of PIN) < ±12 W when VIN = 36 V to 75 V and IO = 5 A to 20 A.
Test result:
Figure 103. Input Power Reading Error
Measure VO within full input voltage and load range.
EVO (error of VO) < ±0.2 V when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Figure 104. Output Voltage Reading Error
Measure IO within full input voltage and load range.
EIO (error of IO) < ±1 A when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Figure 105. Output Current Reading Error
Measure PO within full input voltage and load range.
EPO (error of PO) < ±6 W when VIN = 36 V to 75 V and IO = 0 A to 20 A.
Test result: Pass
Figure 106. Output Power Reading Error
Figure 107. Board Thermal, Ambient Temperature = 25°C