STMicroelectronics STEVAL-TLL009V1 Camera flash based on the STCF07 STEVAL-TLL009V1 STEVAL-TLL009V1 Fiche De Données
Codes de produits
STEVAL-TLL009V1
STCF07
Logic pin description
Doc ID 16757 Rev 3
11/26
7
Logic pin description
7.1 CSEL
pin
This input pin allows the setting of two different levels of current. When the voltage on this
pin is low, the internal multiplexer switches the feedback to the FB1 pin, which is the
dedicated feedback pin for low current operation. When the voltage on the CSEL pin is high,
the internal multiplexer switches the feedback to the FB2s pin, and enables the shorting
transistor connected between the FB1 and FB2 pins. The feedback voltage is sensed
directly on the sensing R
pin is low, the internal multiplexer switches the feedback to the FB1 pin, which is the
dedicated feedback pin for low current operation. When the voltage on the CSEL pin is high,
the internal multiplexer switches the feedback to the FB2s pin, and enables the shorting
transistor connected between the FB1 and FB2 pins. The feedback voltage is sensed
directly on the sensing R
HC
by the connection of FB2s. This sensing pin is dedicated to high
current operation.
7.2 FAULT
pin
When the STCF07 is in ON mode (EN is high), the device is able to detect disconnection or
failure of the LED. This information can be used by the system to signal that a problem has
occurred in the LEDs.
failure of the LED. This information can be used by the system to signal that a problem has
occurred in the LEDs.
7.3 ENABLE
pin
This pin functions as an enable input. No internal pull-up or pull-down is provided.