STP4CMPQTR datasheet(1/22 Pages) STMICROELECTRONICS

Teilenummer	STP4CMPQTR

Bauteilbeschribung	Low voltage 4-channel constant current LED driver with charge pump

PDF	22 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 22 page

January 2012

Doc ID 15770 Rev 2

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22

STP4CMP

Low voltage 4-channel constant current

LED driver with charge pump

Features

■ Operating voltage range: VCC (opr) = 2.7 V to

5.5 V

■ Full RGB function support

■ 4-channel LED driver with individual ON/OFF

control directly from input pins

■ Individual programmable output current for the

4 channels through 4 external resistors with a

max. capability of 30 mA

■ Absolute output current accuracy of max. ±7%

and channel-to-channel mismatch of max. ±

4%

■ Selectable charge pump enable/disable

■ Thermal protection

■ Small QFN20 (1.8 x 3.2 mm) package

Applications

■ Mobile phone display backlighting

■ RGB LED indicator drivers

Description

The STP4CMP is a charge pump based 4-

channel LED driver designed for RGB illumination

or LCD display backlighting. The STP4CMP

works off a battery with an input voltage between

2.7 V - 5.5 V. The device generates regulated

current sinks with high absolute and channel-to-

channel accuracy to drive up to 4 LEDs. It can

support LEDs with forward voltage as high as 3.8

V. The current sink for each channel can be set

with 4 individual external resistors. Each channel

is controlled independently. The PWM control can

be applied directly to the 4 EN (enable) pins to

provide brightness control. When enabled, the

charge pump, which uses a small ceramic bucket

capacitor between C1P and C1N, operates to

regulate the VOUT with a clamping voltage at typ.

5 V. The tiny QFN20 (1.8 x 3.2 mm) package

allows the device to be also used for applications

with space limitation.

QFN20

(1.8 x 3.2 mm)

Table 1.

Device summary

Order code

Package

Packaging

STP4CMPQTR

QFN20

Tape and reel

www.st.com

Ähnliche Beschreibung - STP4CMPQTR

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