STP4CMP

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

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Product overview

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.

  • All 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

Circuit Diagram

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STMicroelectronics - STP4CMP

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STP4CMPQTR
Active
VFQFPN 20 3.2x1.8x0.5 Industrial Ecopack2

STP4CMPQTR

Package:

VFQFPN 20 3.2x1.8x0.5

Material Declaration**:

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Marketing Status

Active

Package

VFQFPN 20 3.2x1.8x0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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