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STCF01 Fiches technique(PDF) 4 Page - STMicroelectronics

No de pièce STCF01
Description  Step-up Converter for Cell Phone Camera Flash LEDs
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCF01 Fiches technique(HTML) 4 Page - STMicroelectronics

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2 Pin Configuration
STCF01
4/16
2
Pin Configuration
Table 1.
Pin Description
Figure 2.
Pin Connnections (Top View )
PlN N°
SYMBOL
NOTE
1PWRGND
This is the application power signal reference. Connect the input and output capacitors to
this pin.
2OVP
This pin senses step-up output voltage, which provides overvoltage protection in the event
that the output voltage exceeds the OVP threshold
3
VI
This pin supplies the input voltage for the step-up stage as well as the supply voltage for the
overall device.
4HC
This pin sets the high level current for the white LEDs with a resistor that is connected
between this pin and VI.
5LC
This pin sets the low level current for the white LEDs with a resistor that is connected
between this pin and VI.
6
SGLGND
This pin is the logic signal reference for the IC.
7FB
This pin senses the current flowing through the white LEDs and uses this feedback to
provide current regulation.
8
SEL
This pin is used to select the signal level of the white LEDs; a low level signal sets the low
level LED current, while the high level signal sets the high level LED current.
9SHDN
This pin enables or disables the Shutdown mode. A high level signal enables device
Shutdown mode, where most of the device internal logic is turned OFF. If this pin is held to
GND, the output current flows through the LEDs continuously (Torch mode).
10
SW
This is the switch node pin, which is connected to the internal N-channel MOSFET drain.


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