LM3535-2ALS

D1A

D2A

D3A

D4A

D53

I

2

C Control

Signals

D1B/

INT

SDIO

1 µF

1 µF

1 µF

1 µF

GND

D62

C1+

C1-

C2+

C2-

SCL

D1C/

ALSA

HWEN

GROUP A

GROUP B

GROUP C

PWM

OR

VIO

VIO

ALSB

LM3535

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SNVS598A – AUGUST 2010 – REVISED MAY 2013

LM3535 Multi-Display LED Driver with Ambient Light Sensing and Dynamic Backlight

Control Compatibility

Check for Samples: LM3535

1

FEATURES

•

Low Profile 20 Bump DSBGA Package

(1.650mm × 2.055mm × 0.6mm)

2

•

Drives Up to 8 LEDs With Up to 25mA of Diode

Current Each

APPLICATIONS

•

External PWM Input For Dynamic Backlight

•

Smart-Phone LED Backlighting

Control

•

Large Format LCD Backlighting

•

Multi-Zone Ambient Light Sensing (ALS)

•

General LED Lighting

•

Dual-ALS Sensor Inputs (LM3535-2ALS Only)

•

ALS Interrupt Reporting

DESCRIPTION

•

Independent On/Off Control for All Current

The LM3535 is a highly integrated LED driver

Sinks

capable of driving 8 LEDs in parallel for large display

•

128 Exponential Dimming Steps with 600:1

applications. Independent LED control allows for a

Dimming Ratio for Group A (Up to 6 LEDs)

subset of the 6 main display LEDs to be selected for

partial illumination applications. In addition to the

•

8 Linear Dimming States for Groups B (Up to 3

main bank of 6, the LM3535 is capable of driving an

LEDs) and D1C (1 LED)

additional 2 independently controlled LEDs to support

•

Programmable Auto-Dimming Function

Indicator applications.

•

Up to 90% Efficiency

The LED driver current sinks are split into three

•

0.55% Accurate Current Matching

independently controlled groups. The primary group

can be configured to drive up to six LEDs for use in

•

Internal Soft-Start Limits Inrush Current

the main phone display. Groups B and C are

•

True Shutdown Isolation for LEDs

provided for driving secondary displays, keypads and

•

Wide Input Voltage Range (2.7V to 5.5V)

indicator LEDs. All of the LED current sources can be

•

Active High Hardware Enable

independently turned on and off providing flexibility to

address different application requirements.

•

Typical Application Circuit

Figure 1.

Figure 2. Minimum Layout

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.