STP4CMP datasheet(1/24 Pages) STMICROELECTRONICS

Part #	STP4CMP

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

PDF	24 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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April 2015

DocID15770 Rev 3

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This is information on a product in full production.

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STP4CMP

Low voltage 4-channel constant current

LED driver with charge pump

Datasheet - production data

Features



Operating voltage range: VCC 2.7 V to 5.5 V



Full RGB function support



4-channel LED driver with individual

ON/OFF control directly from input pins



Individually 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 (1.8x3.2 mm) package

Applications



Mobile phone display backlighting



RGB LED indicator driver

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 and 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 (1.8x3.2 mm) package

allows the device to be also used for applications

with space limitations.

Table 1: Device summary

Oder code

Package

Packing

STP4CMPQTR

QFN20

(1.8x3.2 mm)

Tape and reel

QFN20 (1.8x3.2 mm)

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