STP4CMP Datasheet, PDF (1/24 Pages) STMicroelectronics – Thermal protection

STP4CMP
Low voltage 4-channel constant current
LED driver with charge pump
Datasheet - production data
QFN20 (1.8x3.2 mm)
Features
 Operating voltage range: V_CC 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 C_1P and C_1N, operates to
regulate the V_OUT 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
April 2015
DocID15770 Rev 3
This is information on a product in full production.
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