MartinFowler

2A high-efficiency single-inductor buck-boost DC-DC converter and high-brightness white LED driver based on STBB3JCC

STEVAL-ISA141V2

Overview

The STEVAL-ISA141V2 is a product evaluation board based on the STBB3JCC fixed frequency, high efficiency, buck-boost DC-DC converter. The STBB3JCC is capable of driving a HB WLED from a 1.8 V to 5.5 V input voltage supplied by a one cell Li-Ion battery. Thanks to its high switching frequency (2 MHz) it is possible to reduce the size and cost of the external power components. Low FB voltage (100 mV) reduces power dissipation across the external sensing resistor and maximizes the LED current.

Main features

100 mV voltage feedback
Input voltage range from 1.8 V to 5.5 V
2 A output current at 3.3 V in buck mode (V_IN = 3.6 V to 5.5 V)
800 mA output current at 3.3 V in boost mode (V_IN 2.0 V)
Typical efficiency greater than 94%
± 2% DC feedback voltage tolerance
Automatic transition between step-down and boost mode
Adjustable output voltage from 1.2 V to 5.5 V
Power save mode (PS) at light load

2.0 MHz fixed switching frequency
Adjustable switching frequency up to 2.4 MHz (by external synchronous square signal)
Device quiescent current less than 50 A
Load disconnect during shutdown
Shutdown function and soft-start
Shutdown current
Available in Flip Chip 20, pitch = 0.4 mm
RoHS compliant

Design Files

Related Devices

Devices	Class	introduce	Datasheet
STBB3JCC	Analog mixed-signal IC;Drivers and interfaces	2 A, high efficiency single inductor buck-boost DC-DC converter and high brightness WLED driver	Download

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Update:2024-11-15 01:48:27

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