Pi40952 3x2b Driver -

Using the Pi40952 3x2B in a 3-phase Brushless DC (BLDC) motor driver requires two units (providing a total of 4 channels, using 3).

The Setup:

Result: The driver successfully switched a 24V / 10A motor with minimal heating. The logic-level compatibility meant no level shifters were required between the 3.3V MCU and the 12V power stage.

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Because the PI40952 uses logic inputs, you can implement speed control by enabling/disabling the channel rapidly using PWM on the EN pin OR by toggling one of the input bits. The cleaner method is using the enable pin: pi40952 3x2b driver

// Same pin definitions as above + PWM on EN (Pin 4)
void setup() 
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
  pinMode(EN, OUTPUT);
  // Set EN pin as PWM-capable (e.g., Pin 4 on Arduino Uno is not PWM? Use Pin 5 or 6 instead)
  // This example uses Pin 5 as EN.
void setSpeed(int speedPercent)  // 0 to 255
analogWrite(EN, map(speedPercent, 0, 100, 0, 255));

void loop() 
motorForward();
for (int i = 0; i <= 100; i++) 
setSpeed(i);
delay(20);
delay(1000);
for (int i = 100; i >= 0; i--) 
setSpeed(i);
delay(20);
motorStop();
delay(1000);

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Sample Initialization Code (Arduino C++ pseudo-code):

// Define pins for Channel A
#define A0 2
#define A1 3
// Channel B
#define B0 4
#define B1 5
// Channel C
#define C0 6
#define C1 7
#define ENABLE 8
void setup() 
pinMode(A0, OUTPUT); pinMode(A1, OUTPUT);
pinMode(B0, OUTPUT); pinMode(B1, OUTPUT);
pinMode(C0, OUTPUT); pinMode(C1, OUTPUT);
pinMode(ENABLE, OUTPUT);
digitalWrite(ENABLE, HIGH); // Enable driver

void setChannelA(int state)  // state: 0=Off, 1=Low, 2=Mid, 3=Full
digitalWrite(A0, state & 1);
digitalWrite(A1, (state >> 1) & 1);
 Using the Pi40952 3x2B in a 3-phase Brushless

The Pi40952 3x2B is a compact, high-efficiency dual-channel MOSFET driver board designed for demanding embedded applications. While the "Pi" in the name often suggests a Raspberry Pi affiliation, this specific revision (3x2B) is a general-purpose, high-current gate driver optimized for driving N-Channel MOSFETs in half-bridge, full-bridge, or synchronous buck topologies.

This post details the design philosophy, technical specifications, and application notes for implementing this driver in your next power electronics project. Result: The driver successfully switched a 24V /

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As of 2025, the trend in embedded systems is towards higher integration and lower BOM count. The PI40952 3x2B driver fits this trend perfectly. However, keep these advanced tips in mind: