Pi40952 3x2b Driver

Previous versions suffered from ground bounce during high-current switching events. The 3x2B revision addresses this by:

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:

// 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));
 pi40952 3x2b driver
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);

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
 Because the PI40952 uses logic inputs, you can
void setChannelA(int state)  // state: 0=Off, 1=Low, 2=Mid, 3=Full
digitalWrite(A0, state & 1);
digitalWrite(A1, (state >> 1) & 1);

The PI40952 3x2B driver functions as expected within [X] MHz under [Y] pF load. Suitable for [application]. Full characterization requires official datasheet.