Pin configuration

STCF01

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2

Pin configuration

Table 1.

Pin description

Figure 2.

Pin connections (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

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

5LC

This pin sets the low level current for the white LEDs with a resistor that is connected

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.