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FAN7316 • 1.0.1

4

Pin Definitions

Pin #

Name

Description

1

OLP1

2

OLP2

This pin is for open-lamp protection. If OLP is lower than 1.5V at initial operation, the IC

operates at striking mode for BCT 450 cycles. If OLP is lower than 1.5V in normal mode, the

IC is shut down after a delay of three BCT cycles.

3

CMP

Error amplifier output. A compensation capacitor should be connected between this pin and

ground.

4

FB

Error amplifier inverting input. This pin voltage is regulated at 2V or ADIM voltage.

5

BDIM

This pin is for burst dimming input. The voltage range of 0.5 to 2V at this pin controls burst

mode duty cycle from 0% to 100%.

6

ADIM

This pin is for positive analog dimming input. This voltage to 2V at this pin controls the

amplitude of the lamp current.

7

ENA

This pin is for turning on/off the IC.

8

GND

Ground.

9

OUTL

Low-side driver output. The output stage can deliver about 500mA source and sink current,

typically.

10

VREF

6V reference voltage.

11

VIN

IC supply voltage.

12

VB

High-side floating supply. The bootstrap capacitor should be connected between this pin

and VS pin, which can be fed by an internal bootstrap MOSFET.

13

OUTH

High-side driver output. The output stage can deliver about 500mA source and sink current,

typically.

14

VS

High-side floating supply return. Layout care should be taken to avoid below-ground spikes

on this pin.

15

SCP

This pin is for short-circuit protection. If SCP is higher than 2V, IC enters shutdown mode

after a delay of 32 BCT cycles.

16

RT

This pin programs the switching frequency. The resistor should be connected between this

pin and ground.

17

BCT/FT

This pin programs the burst dimming frequency. A capacitor should be connected between

this pin and ground. The waveform of this pin is the triangular waveform whose amplitude is

from 0.5V to 2V. This pin voltage goes up to 4V when the IC enters shutdown mode.

18

OLR

This pin is for open-lamp regulation. If the voltage at OLR reaches 2V, the IC makes this pin

voltage be controlled not to exceed 2V. If OLR voltage is higher than 1.75V, the IC enters

shutdown mode after delays of 451 BCT cycles in striking mode and three BCT cycles in

normal mode, respectively. If this pin voltage is higher than 3V, the IC enters shutdown

mode without delay.

19

OLP4

20

OLP3

This pin is for open lamp protection. If OLP is lower than 1.5V at initial operation, the IC

operates at striking mode for BCT 450 cycles. If OLP is lower than 1.5V in normal mode, the

IC is shut down after a delay of three BCT cycles.