STCF04 datasheet(1/43 Pages) STMICROELECTRONICS

部件名	STCF04

功能描述	High power white LED SuperCap™ driver with I²C interface

PDF	43 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 43 page

This is information on a product in full production.

September 2012

Doc ID 022927 Rev 3

1/43

43

STCF04

High power white LED SuperCap™ driver with I²C interface

Datasheet

− production data

Features

■ Buck-boost converter with 1.5 A peak current

limiting and synchronous rectification

■ Burst mode operation when output is charged

■ Input voltage range 2.5 V to 5.5 V

■ Programmable output charging voltage up to

5.5 V

■ Full I²C control

■ Operation modes:

– Shutdown mode

– Monitoring mode with NTC and SuperCap

monitoring

– Idle mode

–Flash mode

– Torch mode: up to 320 mA

■ Controlled LED current in all modes

■ Soft and hard triggering of Flash, Torch and

Picture light modes

■ Torch dimming in 12 exponential steps

■ Flash dimming in 8 steps

■ Active balancing of SuperCap voltage

■ SuperCap status flag

■ Internally or externally timed flash operation

■ Digitally programmable safety timeout in Flash

mode

■ Torch mode safety timeout

■ LED overtemperature detection and protection

with external NTC resistor

■ Shorted LED failure detection and protection

■ Chip overtemperature detection and protection

Applications

■ Cell phones and smartphones

■ Camera flashes/strobe

■ PDAs and digital still cameras

Description

The STCF04 is a dedicated and space optimized

high efficiency solution for driving a flash LED

module in cameras, phones, PDAs and other

handheld devices using the SuperCap

technology. It is based on a DC-DC buck-boost

converter, which ensures a proper and efficient

charging control and monitoring of the SuperCap

in the whole battery voltage range. The output

current control ensures a good current regulation

over the forward voltage spread characteristics of

the flash LEDs in Torch and Flash mode

operation. The SuperCap charging current is

limited to a defined value which avoids overload of

the battery. The SuperCap discharge current

flows through the LEDs and the external

MOSFET which must be chosen according to the

desired flash current.

TFBGA25 (3 x 3 mm)

Table 1.

Device summary

Order code

Package

Packaging

STCF04TBR

TFBGA25 (3 x 3 mm)

3000 parts per reel

www.st.com

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