ISL97678IRZ 데이터 시트보기 (PDF) - Intersil

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ISL97678IRZ

8-Channel 45V 50mA LED Driver

Intersil 

Pin Configuration

ISL97678

ISL97678

(32 LD 5X5 QFN)

TOP VIEW

32 31 30 29 28 27 26 25

PGND 1

24 NC

AGND 2

23 OVP

AGND 3

22 PGND

PWM 4

AGND 5

EXPOSED THERMAL PAD

21 LX

20 LX

AGND 6

19 PGND

AGND 7

18 VDC

AGND 8

17 EN

9 10 11 12 13 14 15 16

Pin Descriptions (I = Input, O = Output, S = Supply)

PIN

1, 19, 22

2, 3, 5, 6, 7,

8, 9, 15

4

10

11

NAME

PGND

AGND

PWM

VLOGIC

FSW

12

FPWM

13

14

16

17

18

20, 21

23

24

25 ~ 32

RSET

COMP

VIN

EN

VDC

LX

OVP

NC

CH1 ~ CH8

TYPE

S

S

Power Ground

Analog Ground

DESCRIPTION

I

PWM Brightness Control

O

Internal 2.5V Logic Bias Regulator. Need Decoupling Capacitor for Regulation

I

When RFSW is 100kΩ, fSW is 500kHz.

When RFSW is 33kΩ, fSW is 1.5MHz

I

When RFPWM is 333kΩ, FPWM is 200Hz.

When RFPWM is 3.3kΩ, FPWM is 20kHz.

I

Resistor Connection for Setting LED Current

O

Boost compensation

S

Main Power

I

Enable

S

Internal 5V Analog Bias Regulator. Needs Decoupling Capacitor for Regulation

O

Boost MOSFET Drain Terminal Switching Node

I

Overvoltage Protection Input as well as Output Voltage FB Monitoring

I/O

No Connect

I

LED Driver PWM Dimming Monitoring

4

FN6998.1

November 5, 2009

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