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university:tools:lab_hw:adalm-sr1 [27 Dec 2021 00:01] – [Schematic, PCB Layout, Bill of Materials] Add Karl's test report Mark Thorenuniversity:tools:lab_hw:adalm-sr1 [14 Mar 2023 06:38] (current) – updated the design files download link Joyce Velasco
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 ===== Description===== ===== Description=====
-The [[adi>ADALM-SR1]] (Analog Devices Active Learning Module, Switching Regulator #1) board is a "dis-integrated" DC-DC switcher. With today's [[adi>en/products/power-management/switching-regulators.html|modern controllers]], due to integration, everything is inside a single package which can make it difficult to understand some of the fundamental concepts. Dis-integrating (building the controller from fundamental building blocksenables the ability to investigate and manipulate signals that otherwise would be hidden from the userWith the ADALM-SR1the user can configure it in multiple ways, and better understand switching concepts.+The Analog Devices Active Learning Module - Switching Regulator 1 or [[adi>ADALM-SR1]] board is a "disintegrated" DC-DC switcher. With the highly integrated design of today's [[adi>en/products/power-management/switching-regulators.html|modern controllers]], it is difficult for users to see and understand the concepts of each fundamental componentas everything is built a single package. The ability to disintegrate or build the controller from fundamental building blocks enables users to investigate and manipulate signals. This usually cannot be easily done when using a fully integrated controllerThe ADALM-SR1 is designed in such a way that the user can configure it in multiple ways, allowing better understanding of switching concepts.
  
 Here is a short introduction video: Here is a short introduction video:
 {{youtube>7j4Y0WVEtjU}} {{youtube>7j4Y0WVEtjU}}
  
-We have started several switching regulator exercises covering buck and boost regulators that can be used with the  ADALM-SR1 board. +We have started with several switching regulator exercises covering buck and boost regulators that can be used with the  ADALM-SR1 board. 
  
 [[university:labs:open_loop_boost_and_buck_adalm2000|Activity: Boost and Buck converter elements and open-loop operation]]\\ [[university:labs:open_loop_boost_and_buck_adalm2000|Activity: Boost and Buck converter elements and open-loop operation]]\\
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-The circuits required for these exercises exceed the complexity that can be constructed on a breadboard, so the ADALM-SR1 is required to run them, although the simulations can be run beforehand to gain insight into the circuits' operation.+The circuits required for these exercises exceed the complexity that can be constructed on a breadboard, so the ADALM-SR1 is required to run them. However, the simulations can be done beforehand to gain insight into the circuits' operation.
  
-The Figures 1a and 1b show an overview of the boardalong with connections to an ADALM2000 (m2k) and meters.\\+The Figures 1a and 1b show an overview of the board along with connections to an ADALM2000 (m2k) and meters.\\
  
 {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_overview.jpg?direct&600 |}} {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_overview.jpg?direct&600 |}}
-<WRAP centeralign> Figure 1a. ADSRALM overview</WRAP>\\+<WRAP centeralign> //Figure 1a. ADSRALM Overview//</WRAP>\\
 {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_overview.png?direct&1200 |}} {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_overview.png?direct&1200 |}}
  
-<WRAP centeralign> Figure 1b. ADSRALM overview</WRAP>+<WRAP centeralign> //Figure 1b. ADSRALM Overview//</WRAP>
  
 ===== ADALM-SR1 Jumpers and Connections ===== ===== ADALM-SR1 Jumpers and Connections =====
-The ADALM-SR1 uses 0.635mm (0.025-mil) headers for configuration jumpers, signal inputs, and signal outputs. Signal inputs and outputs are 2-conductor headers with 5.08mm (200-mil) pitch so that they cannot be confused with configuration jumpers. The lower conductor is always a ground connection (that is not always used) and an arrow indicates whether the upper conductor is an input or output.+The ADALM-SR1 uses 0.635 mm (0.025-mil) headers for configuration jumpers, signal inputs, and signal outputs. Signal inputs and outputs are 2-conductor headers with 5.08 mm (200-mil) pitch so that they cannot be confused with configuration jumpers. The lower conductor is always a ground connection (that is not always used)and an arrow indicates whether the upper conductor is an input or output.
  
  
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 {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_topology_modes_loads.png?direct&1200 |}} {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_topology_modes_loads.png?direct&1200 |}}
-<WRAP centeralign> Figure 2. Topology, Mode selection, and Loads</WRAP>+<WRAP centeralign> //Figure 2. Topology, Mode Selection, and Loads//</WRAP>
  
 ==== Inductance Selection ==== ==== Inductance Selection ====
-[[https://www.we-online.de/katalog/datasheet/749196141.pdf|A Wurth 749196141 6-winding coupled inductor]] is used in both boost and buck configurations. The datasheet inductance for a single winding is 8.5μH, with a DC resistance of 344 milliohms. The windings are connected in series on the ADALM-SR1, allowing the inductance to be changed as noted in the table below. (Values in the table are measured from a typical board.)+[[https://www.we-online.de/katalog/datasheet/749196141.pdf|A Wurth 749196141 6-winding coupled inductor]] is used in both boost and buck configurations. The data sheet inductance for a single winding is 8.5 μH, with a DC resistance of 344 milliohms. The windings are connected in series on the ADALM-SR1, allowing the inductance to be changedas noted in the table below. Values in the table are measured from a typical board.
 \\ \\
  
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 ==== Output Capacitors Selection ==== ==== Output Capacitors Selection ====
-A 4.7μF capacitor is always connected to the output of the circuit. An additional 47μF and 470μF can be added by installing jumpers according to the table below.+A 4.7 μF capacitor is always connected to the output of the circuit. An additional 47 μF and 470 μF can be added by installing jumpers, as shown in the table below.
  
 ^ ^   Output Capacitors Selection   ^^ ^ ^   Output Capacitors Selection   ^^
 ^   Jumper      ^   P8, P11   ^^ ^   Jumper      ^   P8, P11   ^^
 |   Position     Installed     Open   | |   Position     Installed     Open   |
-|   Function     P8 connect **aditional** 47μF capacitance     No additional capacitance   | +|   Function     P8 connect **additional** 47μF capacitance     No additional capacitance   | 
-|   :::     P11 connect **aditional** 470μF capacitance     No additional capacitance   |+|   :::     P11 connect **additional** 470μF capacitance     No additional capacitance   |
 |   :::        || |   :::        ||
  
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 ==== Load Resistors Selection ==== ==== Load Resistors Selection ====
-A resistive load may be connected to the output of the circuit. Resistances range from 12.5Ω to 200Ωand may be added in parallel according to the table below. The jumpers are 3-position, with the righ-hand position connecting the resistor to groundand the left-hand position allowing the effective resistance to be adjusted by Pulse-width-modulating the ground connection. +A resistive load may be connected to the output of the circuit. Resistances range from 12.5 Ω to 200 Ω and may be added in parallelaccording to the table below. The jumpers are 3-position, with the right-hand position connecting the resistor to ground and the left-hand position allowing the effective resistance to be adjusted by Pulse-width-modulating the ground connection. 
 \\ \\
 ^ ^   Load Resistors Selection   ^^ ^ ^   Load Resistors Selection   ^^
 ^   Jumper      ^   P18, P14, P13, P17, P16, P15   ^^ ^   Jumper      ^   P18, P14, P13, P17, P16, P15   ^^
 |   Position     Installed     Open   | |   Position     Installed     Open   |
-|   Function     P18 connect 200 Ω load resistance     No aditional load resistor connected   | +|   Function     P18 connect 200 Ω load resistance     No additional load resistor connected   | 
-|   :::     P14 connect 200 Ω load resistance     No aditional load resistor connected   | +|   :::     P14 connect 200Ω load resistance     No additional load resistor connected   | 
-|   :::     P13 connect 100 Ω load resistance     No aditional load resistor connected   | +|   :::     P13 connect 100Ω load resistance     No additional load resistor connected   | 
-|   :::     P17 connect 50 Ω load resistance     No aditional load resistor connected   | +|   :::     P17 connect 50Ω load resistance     No additional load resistor connected   | 
-|   :::     P16 connect 25 Ω load resistance     No aditional load resistor connected   | +|   :::     P16 connect 25Ω load resistance     No additional load resistor connected   | 
-|   :::     P15 connect 12.5 Ω load resistance     No aditional load resistor connected   |+|   :::     P15 connect 12.5Ω load resistance     No additional load resistor connected   |
 |   :::        || |   :::        ||
-| Notes    |   **7V max across 25Ω, 12.5Ω resistors will turn on the Over Power LED illuminates as warning.**   ||+| Notes    |   **7 V max across 25Ω, 12.5Ω resistors will turn on the Over Power LED - which illuminates as warning.**   ||
 \\ \\
-The R87 (LOAD CONTROL) potentiometer controls the duty cycle of all load resistors whose jumper is placed in the adjustable positionby swithcing the ground connection. (**YES** this is super weird, but it's convenient and it works much better than you'd think!) Duty cycle is guaranteed to be zero when fully counter-clockwise and 100% when fully clockwise. Thus the load can be a combination of fixed and variable resistancesand the exact duty cycle of the onboard PWM circuit can be measured at P40. The signal at P40 has a 1k impedance and maybe overdriven by a 3.3V logic signal, allowing the load to be stepped. +The R87 (LOAD CONTROL) potentiometer controls the duty cycle of all load resistors whose jumper is placed in the adjustable position by switching the ground connection. (**YES** this is super weird, but it's convenientand works much better than you'd think!) Duty cycle is guaranteed to be zero when fully counter-clockwise and 100% when fully clockwise. Thusthe load can be a combination of fixed and variable resistances and the exact duty cycle of the onboard PWM circuit can be measured at P40. The signal at P40 has a 1k impedance and may be overdriven by a 3.3 V logic signal, allowing the load to be stepped. 
 \\ \\
-The load PWM frequency is fixed at 200kHz, approximately 10x the typical operating frequency of most experiments, thus appearing as a steady (DC) load. 
 \\ \\
-A 0.1 ohm current sense resistor is in the ground return of the load resistorsallowing the total load current to be easily measured with meter set to the 200mV range at either the LOAD turret post (TP25) or the LOAD CURRENT jumper (P39).+The load PWM frequency is fixed at 200 kHz, approximately 10x the typical operating frequency of most experimentsthus appearing as a steady (DCload.
 \\ \\
 \\ \\
-==== Topology, FET and Current Sense Selection ====+A 0.1-ohm current sense resistor is in the ground return of the load resistors, allowing the total load current to be easily measured with the meter set to the 200 mV range at either the LOAD turret post (TP25) or the LOAD CURRENT jumper (P39). 
 +\\ 
 +\\ 
 +==== Topology, FETand Current Sense Selection ====
 The selection between boost or buck topologies is made by jumpers P25, P35, and P37. The selection between boost or buck topologies is made by jumpers P25, P35, and P37.
 \\ \\
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 | Notes    |   **Proper selection allows complete inductor waveform to be viewed.**   |||||| | Notes    |   **Proper selection allows complete inductor waveform to be viewed.**   ||||||
 \\ \\
-In the boost configuration, P37 does **not** bypass Schottky diode D4P35 routes the FET driver control to the low-side switchand P25 selects the high-side current sense amplifier.+In the boost configuration, P37 does **not** bypass Schottky diode D4P35 routes the FET driver control to the low-side switchand P25 selects the high-side current sense amplifier. 
 +\\
 \\ \\
-In the buck configuration, P37 bypasses D4P35 routes the FET driver control to the high-side switchand P24 selects the low-side current sense amplifier.+In the buck configuration, P37 bypasses D4P35 routes the FET driver control to the high-side switchand P24 selects the low-side current sense amplifier.
 \\ \\
 <WRAP info> <WRAP info>
-Close inspection of the operation of the circuit will show that in theory, either current sense amplifier will work for both topologies, but the amplifier that is NOT at the switch node is chose in order to minimize errors due to common-mode excursion.+Close inspection of the operation of the circuit will show thatin theory, either current sense amplifier will work for both topologies. Still, the amplifier that is NOT at the switch node is chosen to minimize errors due to common-mode excursion.
 </WRAP> </WRAP>
 \\ \\
 \\ \\
- 
 ==== Mode Selection ==== ==== Mode Selection ====
-The ADALM-SR1 has several operational modesset by the jumpers noted below.+The ADALM-SR1 has several operational modes set by the jumpers, as noted below.
 \\ \\
 \\ \\
 The MODE jumper selects between peak current mode and duty cycle control: The MODE jumper selects between peak current mode and duty cycle control:
-  * Peak Current: A fixed frequency clock starts the inductor current ramp by turning on a MOSFET switch, and the switch is opened when a peak current is reached. +  * Peak Current - a fixed frequency clock starts the inductor current ramp by turning on a MOSFET switch, and the switch opens when a peak current is reached. 
-  * Duty Cycle: The duty cycle of the MOSFET switch is controlled directly.+  * Duty Cycle - the duty cycle of the MOSFET switch is controlled directly.
 \\ \\
 ^ ^   Control Mode Selection   ^^ ^ ^   Control Mode Selection   ^^
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 \\ \\
 <WRAP info> <WRAP info>
-The peak current circuit is always activeeven in duty-cycle modeincreasing robustness in the event of an output short circuit.+The peak current circuit is always active even in duty-cycle modeincreasing robustness in the event of an output short circuit.
 </WRAP> </WRAP>
 \\ \\
  
 ==== Duty Cycle Source Selection ==== ==== Duty Cycle Source Selection ====
-An LTC6992 Pulse-Width Modulator allows the switching MOSFET's duty cycle to be controlled directly, either manually by adjusting the DUTY CYCLE knobor under the control of the error amplifier.+An LTC6992 Pulse-Width Modulator allows the switching MOSFET's duty cycle to be controlled directly, either manually by adjusting the DUTY CYCLE knob or under the control of the error amplifier.
 \\ \\
 ^ ^   Duty Cycle Source Selection   ^^ ^ ^   Duty Cycle Source Selection   ^^
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 |   Function     Duty controlled by error amplifier     Duty controlled by potentiometer   | |   Function     Duty controlled by error amplifier     Duty controlled by potentiometer   |
 |   :::        || |   :::        ||
-| Notes    |   **Current Threshold still operational for safetydetermined by Current Threshold Potentiometer.**   ||+| Notes    |   **Current Threshold still operational for safetydetermined by Current Threshold Potentiometer.**   ||
 \\ \\
 \\ \\
  
 ==== Current Threshold Source Selection ==== ==== Current Threshold Source Selection ====
-In peak-current control modes, the peak current can be controlled either manually by adjusting the CURRENT THRESHOLD knobor under the control of the error amplifier. The current threshold is also always active in voltage control modes, maintaining per-cycle current limit as an added safety and robustness feature.+In peak-current control modes, the peak current can be controlled either manually by adjusting the CURRENT THRESHOLD knob or under the control of the error amplifier. The current threshold is also always active in voltage control modes, maintaining the per-cycle current limit as an added safety and robustness feature.
 \\ \\
 ^ ^   Current Threshold Source Selection   ^^ ^ ^   Current Threshold Source Selection   ^^
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 \\ \\
 ==== Feedback Selection ==== ==== Feedback Selection ====
-Three options for feedback network are provided, assuming a 1.25V reference voltage. The 5V option is usually used for buck experiments (input voltage greater than 5V), and the 12V option is usually used for boost experiments (input less than 12V). Footprints for optional 0603-sized resistors are included for user-defined feedback networksselected by the third jumper option.+Three options for feedback network are provided, assuming a 1.25 V reference voltage. The 5V option is usually used for buck experiments (input voltage greater than 5 V), and the 12 V option is usually used for boost experiments (input less than 12 V). Footprints for optional 0603-sized resistors are included for user-defined feedback networks selected by the third jumper option.
 \\ \\
 ^ ^   Feedback Selection   ^^^ ^ ^   Feedback Selection   ^^^
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 The ADALM-SR1 provides numerous test points for stimulating (modulating) and measuring the operation of the circuit, such as input and output voltage, inductor current, and output current. Several aspects of the circuit's dynamic response can also be measured: The ADALM-SR1 provides numerous test points for stimulating (modulating) and measuring the operation of the circuit, such as input and output voltage, inductor current, and output current. Several aspects of the circuit's dynamic response can also be measured:
 \\ \\
- * In open-loop voltage mode, modulate the duty cycle control voltage to characterize the response of the power stage +  * In open-loop voltage mode, modulate the duty cycle control voltage to characterize the response of the power stage 
- * In open-loop current mode, modulate the current threshold (ITH) to characterize the response of the power stage +  * In open-loop current mode, modulate the current threshold (ITH) to characterize the response of the power stage 
- * In any closed-loop mode, modulate the feedback divider to characterize the closed-loop response of the whole circuit.+  * In any closed-loop mode, modulate the feedback divider to characterize the closed-loop response of the whole circuit.
 \\ \\
-Connections are summarized in Figure X belowand the following tables.+Connections are summarized in Figure X below and the following tables.
 \\ \\
 {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_aux_measure_inject.png?direct&1200 |}} {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_aux_measure_inject.png?direct&1200 |}}
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 |   **P1**     SW_NODE_HI     Switch node in buck topology.   | |   **P1**     SW_NODE_HI     Switch node in buck topology.   |
 |   **P4**     SW_NODE_LOW     Switch node in boost topology.   | |   **P4**     SW_NODE_LOW     Switch node in boost topology.   |
-|   **P2**     IHIGH     Current sense amplifier output, boost configurations (0.1Ω sense R, G=7, 1.429A/V net output).   | +|   **P2**     IHIGH     Current sense amplifier output, boost configurations (0.1Ω sense R, G=7, 1.429 A/V net output).   | 
-|   **P12**     ILOW     Current sense amplifier output, buck configurations (0.1Ω sense R, G=7, 1.429A/V net output).   |+|   **P12**     ILOW     Current sense amplifier output, buck configurations (0.1Ω sense R, G=7, 1.429 A/V net output).   |
 |   **P10, P9, TP5, TP7**     V_OUT     Experiment output voltage. P10 can be AC coupled by removing P9.   | |   **P10, P9, TP5, TP7**     V_OUT     Experiment output voltage. P10 can be AC coupled by removing P9.   |
 |   **P5**     FB_MEAS     Feedback perturbation measurement (AC coupled).   | |   **P5**     FB_MEAS     Feedback perturbation measurement (AC coupled).   |
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 ^   Injection Points   ^^^ ^   Injection Points   ^^^
 ^ ^   Name     Notes   ^ ^ ^   Name     Notes   ^
-|   **P28**     ITH MOD     Peak current control modulation (1.429A/V). Install P29 to DC couple.   |+|   **P28**     ITH MOD     Peak current control modulation (1.429 A/V). Install P29 to DC couple.   |
 |   **P27**     DUTY CYCLE MOD     Duty Cycle modulation (100%/V). Install P26 to DC couple.   | |   **P27**     DUTY CYCLE MOD     Duty Cycle modulation (100%/V). Install P26 to DC couple.   |
 |   **P7**     FB_MOD     Feedback modulation for loop gain measurements (XXV/V). Install P6 to DC couple.   | |   **P7**     FB_MOD     Feedback modulation for loop gain measurements (XXV/V). Install P6 to DC couple.   |
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 ===== Auxiliary Circuit Details ===== ===== Auxiliary Circuit Details =====
-The setup and operation of circuitry associated with the lab exercises is described in detail in the exercises themselves. The ADALM-SR1 includes various auxiliary housekeeping and protection circuits described here.+The setup and operation of circuitry associated with the lab exercises are described in detail in the exercises themselves. The ADALM-SR1 includes various auxiliary housekeeping and protection circuits described here.
  
 \\ \\
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 \\ \\
  
-==== Housekeeping supplies and reference ==== +==== Housekeeping Supplies and Reference ==== 
-The ADALM-SR1 has two power inputs. The experiment power input is supplied by the user, and the voltage will vary depending on the experiment being run. An additional micro USB connector is the input for a 5V "housekeeping" supply that powers all of the control circuitry, allowing the experiment power to vary over a wide range. An LT3472 boosts inverts the 5V supply to +15 / -2V, respectively. This provides a high voltage and slightly negative voltage for the LT1995 current sense amplifiersand a negative supply for the error amplifier.+The ADALM-SR1 has two power inputs. The user supplies the experiment power input, and the voltage will vary depending on the experiment being run. An additional micro USB connector is the input for a 5 V "housekeeping" supply that powers all of the control circuitry, allowing the experiment power to vary over a wide range. An LT3472 boosts or inverts the 5 V supply to +15 / -2 V, respectively. This provides a high voltage and slightly negative voltage for the LT1995 current sense amplifiers and a negative supply for the error amplifier
 +\\ 
 +\\ 
 +An LT1970-1.25 provides an accurate reference for the error amplifier and duty cycle current threshold adjustment potentiometers.
 \\ \\
-An LT1970-1.25 provides an accurate reference for the error amplifier and duty cycle, current threshold adjustment potentiometers. 
 \\ \\
 ==== Input Overvoltage, Undervoltage, Reverse voltage, and Overcurrent ==== ==== Input Overvoltage, Undervoltage, Reverse voltage, and Overcurrent ====
-The Figure below shows an LTspice schematic of the ADALM-SR1's protection circuitry. The simulation file is available at [[https://github.com/mthoren-adi/education_tools/blob/sr1/m2k/ltspice/ol_boost_and_buck/OL_engineer_proofing.asc|OL_engineer_proofing.asc]] and running the simulation in LTspice will exercise some of the various fault conditions.+The Figure below shows an LTspice schematic of the ADALM-SR1's protection circuitry. The simulation file is available at [[https://github.com/mthoren-adi/education_tools/blob/sr1/m2k/ltspice/ol_boost_and_buck/OL_engineer_proofing.asc|OL_engineer_proofing.asc]]and running the simulation in LTspice will exercise some of the various fault conditions.
 \\ \\
 {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_engineer_proofing.png |}} {{ :university:tools:lab_hw:adalm_sr1:adalm_sr1_engineer_proofing.png |}}
 \\ \\
-An LTC4368 and associated circuitry protects the experiment power input by only turning on when the supply is between 3V and 15V. The circuit is protected from voltages between -40V and +60V. The LTC4368 also functions as a fuse, shutting off the supply if the current exceeds 2A.+An LTC4368 and associated circuitry protects the experiment power input by only turning on when the supply is between 3 V and 15 V. The circuit is protected from voltages between -40 V and +60 V. The LTC4368 also functions as a fuse, shutting off the supply if the current exceeds 2 A. 
 +\\
 \\ \\
 ==== Output Overvoltage ==== ==== Output Overvoltage ====
-In boost mode, the ADSRALM can produce high voltages under certain conditions: if the duty cycle is high and the load is light, or if feedback is disconnected. An LTC2912 overvoltage / undervoltage supervisor will disable the switching circuitry if the output exceeds 22V. An SMAJ24A, 24-volt TVS diode provides additional protection.+In boost mode, the ADSRALM can produce high voltages under certain conditions: if the duty cycle is high and the load is light, or if feedback is disconnected. An LTC2912 overvoltage / undervoltage supervisor will disable the switching circuitry if the output exceeds 22 V. An SMAJ24A, 24-volt TVS diode provides additional protection. 
 +\\
 \\ \\
 ==== Inductor, Load Resistor Overtemperature ==== ==== Inductor, Load Resistor Overtemperature ====
 The inductor and onboard load resistors can get warm during certain experiments or if the board is misconfigured. Three temperature sensors measure the inductor temperature and the temperature of the high-dissipation areas of the load resistor bank. If any temperature exceeds 60ºC, switching is disabled for a 1.9 second cool-down period. The inductor and onboard load resistors can get warm during certain experiments or if the board is misconfigured. Three temperature sensors measure the inductor temperature and the temperature of the high-dissipation areas of the load resistor bank. If any temperature exceeds 60ºC, switching is disabled for a 1.9 second cool-down period.
 \\ \\
-The low-resistance loads consist of parallel, single 100Ω, 1/2W resistors - An orange LED near the associated jumpers illuminates when the output voltage exceeds 7V as a warning that these must be disconnected. 
 \\ \\
-The high resistance loads consist of multiples of two 100-ohm, 1/4W resistors in series, which will handle voltages up to 14V. A temperature sensor is still included in case the output voltage exceeds 14V or if the experiment is left running for an extended period of time.+The low-resistance loads consist of parallel, single 100 Ω, 1/2 W resistors. An orange LED near the associated jumpers illuminates when the output voltage exceeds 7 V as a warning that these must be disconnected. 
 +\\ 
 +\\ 
 +The high resistance loads consist of multiples of two 100-ohm, 1/4 W resistors in series, which will handle voltages up to 14 V. A temperature sensor is still included in case the output voltage exceeds 14 V or if the experiment is left running for an extended period of time.
 \\ \\
  
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 <WRAP round 80% download> <WRAP round 80% download>
-ADALM-SR1  Design & Integration Files\\ +[[adi>media/en/evaluation-documentation/evaluation-design-files/adalm-sr1-designsupport.zip|ADALM-SR1 Design & Integration Files]] 
-  * {{ :university:tools:lab_hw:adalm_sr1:02-059790-01-c.pdf | Schematics}}+  * Schematics 
 +  * PCB Layout 
 +  * Bill of Materials 
 +  * Allegro Project
 </WRAP> </WRAP>
  
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 <WRAP round 80% download> <WRAP round 80% download>
-This is an informal internal test reportintended to exercise operating conditions outside those detailed in the experiments. This may be useful for those developing additional exercises.\\+This is an informal internal test report intended to exercise operating conditions outside those detailed in the experiments. This may be useful for those developing additional exercises.\\
   * {{ :university:tools:lab_hw:adalm_sr1:adalm-sr1_test_report.pptx | ADALM-SR1 Test Report}}   * {{ :university:tools:lab_hw:adalm_sr1:adalm-sr1_test_report.pptx | ADALM-SR1 Test Report}}
 </WRAP> </WRAP>
university/tools/lab_hw/adalm-sr1.txt · Last modified: 14 Mar 2023 06:38 by Joyce Velasco