IR3599/IR3599A

PWM Doubler/Quad Logic

July 02, 2012 | V1.8

5

PIN DESCRIPTIONS

PIN #

PIN NAME

PIN DESCRIPTION

1

PWM_IN

The PWM_IN is the control signal input. Connect this pin to the PWM output of the controller. In

Doubler mode, PWM_IN controls the behavior of PWM1 and PWM2. In QUAD mode, PWM_IN

controls the behavior of PWM1, PWM2, PWM3, and PWM4.

2

V1p8

1.8V internal LDO output. Place a high quality low ESR 0.47uF ceramic capacitor from this pin to the

IR3599/IR3599A GND.

3

VCC

Connect this pin to a +3.3V bias supply. Place a high quality low ESR 0.1uF ceramic capacitor from

this pin to the IR3599/IR3599A GND.

4

FUNCTION

The FUNCTION pin controls the Phase Mode (Doubler or Quad Modes). The FUNCTION pin levels

are controlled by connecting the FUNCTION pin to Ground or VCC. Refer to the configuration

instructions in Table 1 to program the FUNCTION pin. At power up, the function pin selection

is latched into the IR3599/IR3599A, and therefore cannot be changed after initial power up.

5

PWM4

Channel 4 PWM signal to the power stage

6

PWM3

Channel 3 PWM signal to the power stage

7

PWM2

Channel 2 PWM signal to the power stage

8

PWM1

Channel 1 PWM signal to the power stage

(PAD) 9

GND

Bias and reference ground. All signals are referenced to this node.