2

FN6353.0

July 2, 2007

Pin Descriptions

PIN NUMBER

NAME

DESCRIPTION

1

GND

Signal ground

2

VGH_M

Gate Pulse Modulator Output

3

VFLK

Gate Pulse Modulator Control input

4

VDPM

Gate Pulse Modulator Enable. Connect a capacitor from VDPM to GND to set the delay time before GPM is

enabled. A 20

μA current source charges CDPM. Power on delay time = 60.75k*CDPM.

5

VDD1

Gate Pulse Modulator Low Voltage Input

6

VDD2

VCOM Amplifier Supply

7

OUT

VCOM Amplifier Output

8

NEG

VCOM Amplifier Inverting input

9

POS

VCOM Amplifier Non-inverting input

10

AGND

VCOM Amplifier Ground

11

CD2

Voltage detector rising edge delay. Connect a capacitor between this pin and GND to set the rising edge delay.

12

VDIV

Voltage detector threshold. Connect to the center of a resistive divider between VIN and GND.

13

RESET

Voltage detector reset output.

14

SS

Boost Converter Soft-Start. Connect a capacitor between this pin and GND to set the soft-start time.

15

COMP

Boost Converter Compensation pin. Connect a series resistor and capacitor between this pin and GND to

optimize transient response.

16

FREQ

Boost Converter frequency select

17

VIN2

Boost Converter power supply

18

LX

Boost Converter Switching Node

19

ENABLE

Chip Enable pin. Connect to VIN1 for normal operation, GND for shutdown.

20

FB

Boost Converter Feedback

21

PGND

Boost Converter Power Ground

22

RE

Gate Pulse Modulator Slew Control. Connect a resistor between this pin and GND to set the falling slew rate.

23

CE

Gate Pulse Modulator Delay Control. Connect a capacitor between this pin and GND to set the delay time.

24

VGH

Gate Pulse Modulator High Voltage Input

ISL97645A