ISL97632IRT14ZT 데이터 시트보기 (PDF) - Intersil

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ISL97632IRT14ZT

LED Driver with 1-Wire Dimming

Intersil 

Block Diagram

VIN (2.4V TO 5.5V)

CIN

VIN

1.4MHZ OSCILLATOR AND RAMP

GENERATOR

ISL97632

L

EN

ISL97632

PWM

COMPARATOR

PWM LOGIC

CONTROLLER

FET

DRIVER

LX

VOUT

CURRENT

SENSE

GM AMP

COMPENSATION

SDIN

GM

AMPLIFIER

10mV to 186mV

SERIAL

INTERFACE

GND

FBSW

EN

FB

BANDGAP

REFERENCE

GENERATOR

COUT

2 to 7 LEDs

RSET

Pin Descriptions

PIN

NUMBER

1

2

PIN

NAME

GND

VIN

3

EN

4

SDIN

5

FB

6

FBSW

7

VOUT

8

LX

DESCRIPTION

Ground Pin. Connect to local ground.

Input Supply Pin. Connect to the input supply voltage, the inductor and the input supply decoupling

capacitor.

Enable Pin. Connect to enable signal to turn-on or off the device. Active High.

Single-Wire XSD Digital Interface (1-Wire Interface).

Feedback Pin. Connect to the cathode of bottom LED and the sense resistor.

Optional FB Disconnect Switch.

Output Pin. Connect to the anode of the top LED and the output filter capacitor.

Switching Pin. Connect to inductor.

3

FN9239.3

March 22, 2010

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