AT9919

DS20005595A-page 6

 2016 Microchip Technology Inc.

2.0

PIN DESCRIPTION

The details on the pins of AT9919 are listed on

Table 2-1. Refer to Package Type for the location of

pins.

TABLE 2-1:

PIN FUNCTION TABLE

Pin Number

Pin Name

Description

1

CS

Current sense input. Senses LED string current.

2

VIN

Input voltage 4.5V to 40V DC

3

RAMP

Analog PWM dimming ramp output

4

ADIM

Analog 0V~2V signal input for analog control of PWM dimming

5

DIM

PWM signal input

6

VDD

Internally regulated supply voltage. Connect a capacitor from VDD to ground.

7

GND

Device ground

8

GATE

Drives GATE of the external MOSFET

TAB

GND

Must be wired to pin 7 on PCB