STCF02_07 Datasheet, PDF (4/19 Pages) STMicroelectronics – High power white led driver

Pin connections
2 Pin connections
Figure 2. Pin configuration (bottom view)
STCF02
Table 2. Pin description
Pln N°
1
2
3
4
5
6
7
8, 10
9
11
12
13
14
15
16
17
Symbol
VLX2
RX
V_O
NTC
FB1
RTBY
FB2
GND
COM1
COM2
VBAT
PVBAT
VLX1A
VLX1B
EN3
EN2
Name and function
Note
Inductor connection
Rx Resistor connection
External coil is connected between this pin and VLX1. It should be
placed as close as possible to the device in order to minimize
resistance which cause losses.
Rx resistor is connected between this pin and ground to set LED over
temperature threshold.
Output voltage
Anode of the LED is connected to this pin.
NTC Resistor connection
This pin is used for the LED temperature sensing using an external
NTC resistor.
Feedback pin for torch This pin is used for current sensing in Torch mode – Cathode of the
mode
Flash LED and RTorch resistor are connected to this pin.
R_TORCH Bypass
This pin is used to short-circuit the R_TORCH during FLASH and
MIDDLE FLASH MODE.
Feedback pin for flash
mode
This pin is used to sense the voltage across R_FLASH. It must be
directly connected to the non-grounded terminal of R_FLASH.
Signal ground
This is the signal ground pin related to digital and analog signals and
must be connected as close as possible to the sensing resistor.
Compensation
connection
Optional external compensation should be connected to these pins.
Compensation
connection
Optional external compensation should be connected to these pins.
Supply voltage
Supply pin of the device.
Power supply voltage Power supply pin of the device.
External coil is connected between these pins and VLX2. They should
Inductor connection
be placed as close as possible to the device in order to minimize
resistance which causes losses. It is mandatory to connect VLX1A
and VLX1B together.
Enable Pin 3
Digital input that allows selection of the operational modes of the
device (refer to truth table).
Enable Pin 2
Digital input that allows selection of the operational modes of the
device (refer to truth table).
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