1

FEATURES

DESCRIPTION

APPLICATIONS

C1

4.7 F

m

R1

8

L1

4.7 H

m

TPS61166

VIN

NC

SW

FB

EN

OUT

VO

VBAT

GND

PWM

V

2.5Vto6V

in

15kHz/50%dutycycle

C2

4.7 F

m

TPS61166

WHITE LED DRIVER WITH INTEGRATED POWER DIODE AND FAST BURST MODE

DIMMING

• IC Supply Range: 2.5-V to 6-V

• Power Stage Input Range: 4.5-V to 10-V

The TPS61166 is a boost converter with a 20-V rated

integrated switch FET and power diode that drives up

• Integrated 1.1-A / 20-V Internal Switch FET and

to 5 LEDs in series. This device integrates a high

Power Diode

side switch FET that can turn on/off the LED current

• Drive up to 5 LEDs in Series

within 1-

µs of the applied external PWM signal. The

• Fast on/off LED Current Within 1-µs in

high

side

switch

also

provides

input-to-output

isolation during IC shutdown.

Brightness Dimming

• Burst PWM Dimming Method With Frequency

The default white LED current is set with the external

Range From 60-Hz to 40-kHz

sensor resistor R1, and the feedback voltage is

regulated to 200-mV, as shown in the typical

• Built-in Soft Start-up

application circuit. The LED current can be adjusted

• Over Load Protection

using a pulse width modulation (PWM) signal through

• Over Voltage Protection

the PWM pin. The LED current is synchronized to the

PWM signal. The device does not discharge the

• 2.5 × 2.5 × 0.8 mm SON Package

output

ceramic

capacitor

during

dimming,

thus

reducing audible noise when dimming.

Separating the IC input (VIN pin) and power stage

• Small Form Factor LCD Backlight

input (VBAT pin) makes the device flexible enough to

• Mobile Phone

support single- or two-cell Li-ion battery applications.

• Digital Camera

Other protection features include 1.1-A peak-to-peak

• Personal Camcorder

over current protection (OCP), over voltage protection

• Single Lens Reflex

(OVP), over load protection (OLP), and thermal

shutdown. The TPS61166 is available in a 2.5 mm ×

2.5 mm SON package with thermal pad.

Figure 1. Single Cell Li-Ion Battery Typical Application

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 © 2009, 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.