STMicroelectronics STEVAL-TLL009V1 Camera flash based on the STCF07 STEVAL-TLL009V1 STEVAL-TLL009V1 Fiche De Données

Doc ID 16757 Rev 3

13/26

         

When the peak inductor current exceeds the maximum switch peak current limit of 2.3 A, the 
PWM controller turns off and is enabled at the next oscillation period.

The device includes power failure protection, which stops the operation of the PWM 
controller when the voltage at the pin V

OUT

 exceeds the OVP threshold. When the voltage 

on pin V

OUT

 is reduced by OV

HYST

, the operation of the controller recovers automatically.

Internal thermal shutdown protection switches off the device when the junction temperature 
exceeds 140 °C (typ). The hysteresis comparator allows the PWM controller to restart 
automatically when the temperature is reduced to 120 °C.

The device is capable of switching off the power circuit when a high temperature on the LED 
is detected. (see 

If the sensing LED temperature feature is not used, NTC pin must be left floating and RX pin 
must be grounded.

         

T

ON

< 2 ms

ENABLE

I

OUT

I

LED

T

ON

< 2 ms

ENABLE

I

OUT

I

LED