STLA02 datasheet(1/23 Pages) STMICROELECTRONICS

부품명	STLA02

상세설명	White LED driver for display backlight

PDF	23 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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1 / 23 page

February 2011

Doc ID 010005 Rev 1

1/23

23

STLA02

White LED driver for display backlight

Features

■ Boost DC-DC converter

■ Drives up to 6 LEDs with a total current up to 20

mA

■ Output power capability up to 500 mW

■ Input voltage range 2.5 V to 18 V

■ Output current control

■ 2.3 MHz switching frequency

■ PWM input for the output current dimming with

300:1 dimming range

■ 350 mA integrated switch

■ Overvoltage protection

■ Chip overtemperature detection and protection

■ Soft-start implemented

■ Package DFN6 2 x 2 mm

Applications

■ PDA and handheld devices

■ Cellular phones

■ MP3 players

Description

STLA02 is a boost converter that operates from

2.5 V to 18 V and can provide an output voltage

as high as 27 V and can drive up to 6 white LEDs

connected in series. The total output current

capability is 20 mA at an output voltage of 24 V.

The total output power capability is up to 500 mW.

The regulation is done by the internal error

amplifier which works with the feedback voltage

from the sensing resistor connected in high side

sensing configuration. The device can be turned

on/off by the logic signal connected to the EN pin

and this pin is also dedicated for the PWM

dimming of the output current. Current mode

control of the regulation allows a fast response to

a change of the enable pin voltage level.

DFN6 (2 x 2 mm)

Table 1.

Device summary

Part number

Order code

Package

STLA02

STLA02PUR

DFN6 (2 x 2 mm)

www.st.com

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