smallembedded

HB LED driver, based on ST1CC40 in QFN package, with disable function

STEVAL-ILL046V1

Overview

The STEVAL-ILL046V1 evaluation board is based on the ST1CC40, which is an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as a precise constant current source with an adjustable current capability of up to 3 A DC.

In closed loop operation, the ST1CC40 feedback pin voltage is 100 mV thus the sensing resistor calculation is expressed as R_s = 100 mV/I_LED.
The STEVAL-ILL046V1 is provided with 660 mA by connecting a 150 mW sensing resistor to the feedback pin.
The overall application size is minimized, thanks to the high switching frequency and ceramic output capacitor compatibility.
The STEVAL-ILL046V1 evaluation board is fully protected against overheating, overcurrent and output short-circuit.
The inhibit mode minimizes the current consumption in standby (6 µA) to maximize battery life in portable devices.

Main features

3 to 18 V operating input voltage range
850 kHz fixed switching frequency
100 mV (typ) current sense voltage drop
6 µA standby current in inhibit mode
±7% output current accuracy
Synchronous rectification

Embedded compensation network
Internal current limiting
Ceramic output capacitor compliant
Thermal shutdown
RoHS compliant

Design Files

Related Devices

Devices	Class	introduce	Datasheet
ST1CC40	semiconductor;Analog mixed-signal IC	LED DISPLAY DRIVER	Download

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Update:2024-11-22 12:02:46

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