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June 2012

Doc ID 023248 Rev 1

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STEVAL-TLL012V1

4-channel LED driver with charge pump based on the STP4CMP

Data brief

Features

control directly from input pins

4 channels through 4 external resistors with a

max. capability of 30 mA

and channel-to-channel mismatch of max. ±

4%

Description

The STEVAL-TLL012V1 demonstration board

demonstrates the performance of the STP4CMP,

a charge pump based 4-channel LED driver

designed for RGB illumination or LCD display

backlighting.

This device 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) inputs to provide brightness control.

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