ISL97672BIRZ Intersil Corporation, ISL97672BIRZ Datasheet

ISL97672BIRZ

Manufacturer Part Number

ISL97672BIRZ

Description

20 LEAD QFN 3X4X0./260 DEGREE CELSIUS/6-CH LED DRIVER WITH PWM DIMMING. VSC

Manufacturer

Intersil Corporation

Datasheet

1.ISL97672BIRZ.pdf (18 pages)

Specifications of ISL97672BIRZ

Pack_quantity

Comm_code

85423990

Lead_time

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

H&T Electronics

Part Number:

ISL97672BIRZ

Quantity:

1 295

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL97672BIRZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

H&T Electronics

Part Number:

ISL97672BIRZ-T

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6-Channel LED Driver with Ultra Low Dimming

Capability

ISL97672B

The ISL97672B is an integrated power LED driver that controls

six channels of LED current for LCD backlight applications. The

ISL97672B is capable of driving LEDs from 4.5V to 26.5V, with

a maximum output of 45V.

The ISL97672B employs an adaptive boost switching

architecture that allows Direct PWM dimming with linearity as

low as 0.007% at 200Hz or 0.8% at 20kHz. Dimming can be as

high as 30kHz.

The ISL97672B can compensate for non-uniformity of forward

voltage drops in the LED strings. Its headroom control circuit

monitors the highest LED forward voltage string for output

regulation to minimize voltage headroom and power loss in a

typical multi-string operation. Typical current matching between

channels is ±0.7%.

The ISL97672B features extensive protection functions that

flag whenever a fault occurs. The protections include

string-open and short-circuit detections, OVP, OTP, and an

optional output short-circuit protection with a fault disconnect

switch.

The ISL97672B is offered in a compact 20 Ld QFN 3x4

package and can operate in ambient temperatures of -40°C to

+85°C.

June 13, 2012

FN7995.0

= 4.5V~26.5V

FIGURE 1. TYPICAL APPLICATION DIAGRAM

Q1 OPTIONAL

FAULT

VIN

VDC

/FLAG

COMP

PWM

RSET

FSW

AGND

ISL97672B

PGND 19

OVP

CH0

CH1

CH2

CH3

CH4

CH5

LX 20

* V

OUT

= 45V*, 6 x 50mA

> 12V

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

Features

• 6 x 50mA Channels

• 4.5V to 26.5V Input

• 45V Output Max

• Adaptive Boost Switching Architecture

• Direct PWM Dimming with Dimming Linearity of

• Adjustable 200kHz to 1.4MHz Switching Frequency

• Dynamic Headroom Control

• Fault Protections with Latched Flag Indication

• Current Matching ±0.7%

• 20 Ld 3x4 QFN Package

Applications

• Notebook Displays LED Backlighting

• LCD Monitor LED Backlighting

• Multi-Function Printer Scanning Light Source

0.007%~100% at 200Hz or 0.8%~100% <20kHz

- String Open/Short Circuit

- OVP

- OTP

- Optional Output Short-Circuit Fault Protection Switch

All other trademarks mentioned are the property of their respective owners.

1.2

1.0

0.8

0.6

0.4

0.2

0.0

0 0.4

FIGURE 2. DIMMING LINEARITY AT 20kHz

0.8

1.2

PWM DIMMING DUTY CYCLE (%)

1.6

2.0

2.4

2.8 3.2 3.6

LED

PWM

4.0

= 20mA

4.4 4.8

= 20kHz

5.2

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