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STEVAL-TLL002V1
Flash driver evaluation board based on the STCF01
Data Brief
Features

For camera flash in cellular phones PWM mode control High efficiency over wide range of input voltage from 2.6 V to 5.5 V Output voltage: 16.5 V High switching frequency: 1.5 MHz
Description
This evaluation board is based on the STCF01, that is a white LED driver optimized for driving two to four LEDs from a Li-Ion battery input. It provides up to 300 mA over an input voltage range of 2.6 V to 5.5 V and it features 16.5 V output voltage, 1.5 MHz internal power switch, internal soft start, open load voltage protection and optimized internal compensation. Only an inductor, a Schottky diode, two capacitors and two resistors are required. Besides, a low output ripple is guaranteed by the current mode PWM topology and by the use of low E.S.R. SMD ceramic capacitors The STCF01 is ideal for camera flash in cellular phones requiring, small circuit size and very high efficiency (up to 90%). STEVAL-TLL002V1
October 2008
Rev 1
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www.st.com 4
For further information contact your local STMicroelectronics sales office.
Board schematic
STEVAL-TLL002V1
1
Board schematic
Figure 1. Typical application schematic
Suggested Values: RLC=12k RHC=4k C1=2.2F C2=4.7F L1=10H
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STEVAL-TLL002V1
Revision history
2
Revision history
Table 1.
Date 27-Oct-2008
Document revision history
Revision 1 Initial release. Changes
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STEVAL-TLL002V1
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