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Low Voltage Drive Board
Features
Connects to the Controller board and has a power stage that can drive drive motors up to 48V and 20A.
Drives 2 motors simultaneously
High frequency drive stage implemented with
ADI isolated gate drivers
Supported motor types
Integrated over current protection
Reverse voltage protection
Current and Voltage measurement using isolated ADCs
BEMF zero cross detection for sensorless control of PMSM or BLDC motors
Separate voltage supplies for the 2 motors so that the motors don’t influence each other
Block Diagram
Picture and Main Components
Key Parts
Measurement |
AD7401A | 5 kV rms, isolated 2nd order Sigma-Delta modulator |
AD8207 | Zero drift, high voltage, bidirectional difference amplifier |
AD8251 | 24 MHz rail-to-rail dual op amp |
AD8630 | Zero drift, single-supply, rail-to-rail quad op amp |
Power |
ADuM5000 | isoPower® integrated isolated dc-to-dc converter |
ADP1621 | Constant-frequency, current-mode step-up dc/dc controller |
ADP2301 | 1.2 A, 20 V, 1.4 MHz non-synchronous step-down switching regulator |
ADP7102 | 20 V, 300 mA, low noise, CMOS LDO |
MOSFET Drivers |
ADuM5230 | Isolated half-bridge driver with integrated high-side supply |
IRS2336DSTRPBF | High voltage 3 phase gate driver IC |
Connectors
Power connector
BLDC / Stepper motor connector
For BLDC motors use connector P1 (Phase 1, 2 and 3)
For Stepper motors use connector P1 and pin 3 of P5 (Phase 1, 2, 3 and 4)
Switches
Emergency Stop Switch
S2 is a latching emergency stop switch.
If triggered the supply for the power stage is turned off.
Led DS3 indicates the state of the power stage.
Reset switch
LEDs
LED | Description |
DS1 | Vadj Power Good |
DS2 | 12V Power Good |
DS3 | Over Current |
DS4 | Motor Fault |
DS5 | PWM Enable |
DS6 | Motor Power Good |
< 100% 100% > | |
Power Map
Motor Driver Interface
The IRS2336D Three Phase Gate Driver IC has the following interface signals features:
3 pairs of complementary PWM signals with inverted logic
PWM frequency up to 150
kHz
Hardware integrated dead-time protection
Enable signal to start / stop the driver
Fault signal from the driver
Downloads