1 µH

10 µF

10 µF

PGND

x2

VLED

x2

SW

x2

TORCH

STROBE

x2

ENABLE

SCL

SDA

AGND

LM3565

Tx-MASK

10 µF

100 nF

WLED

WLED

LM3565

www.ti.com

SNVS957 – JANUARY 2013

4MHz, High-Current Flash LED Driver

Check for Samples: LM3565

1

FEATURES

DESCRIPTION

The LM3565 is a 4 MHz fixed-frequency, current

•

High Efficiency Synchronous Boost Converter

mode synchronous boost converter designed to drive

•

Drives 2 LEDs in Series with up to 930 mA

two series flash LEDs at 930 mA. A high-voltage

•

External Strobe Pin for Hardware Enabled

current source allows the LEDs to be terminated to

Flash

the GND plane eliminating the need for an additional

return trace back to the IC.

•

External Torch Pin for Hardware Enabled

Torch

A dedicated Strobe pin provides a direct interface to

trigger the flash event, while an external Torch pin

•

Dedicated Transmit Interrupt Pin

provides an additional method for enabling the LEDs

•

8-Bit ADC for LED Voltage and Input Voltage

in a constant current mode. The LM3565 can

Monitoring

adaptively scale the maximum flash level delivered to

•

Automatic Diode Current Scale Back

the LEDs based upon the measured input voltage.

•

PWM Control in Flash and Assist Modes

Multiple protection features are available on the

•

Fault Detection and Reporting

LM3565 ranging from over-voltage protection to

output short-circuit detection.

•

•

16-Bump, 1.990 mm x 1.990 mm x 0.6 mm

The LM3565 has four selectable inductor current

limits to help the user select an inductor that is

DSBGA Package (YZR0016AAA)

appropriate for the design.

APPLICATIONS

•

Camera Phone LED Flash

TYPICAL APPLICATION CIRCUIT

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

PRODUCTION DATA information is current as of publication date.

Copyright © 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.