Pin connections

STCF02

4/19

2

Pin connections

Table 2.

Pin description

Figure 2.

Pin configuration (bottom view)

Pln N°

Symbol

Name and function

Note

1

VLX2

Inductor 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.

2

RX

Rx Resistor connection

Rx resistor is connected between this pin and ground to set LED over

temperature threshold.

3

Output voltage

Anode of the LED is connected to this pin.

4

NTC

NTC Resistor connection

This pin is used for the LED temperature sensing using an external

NTC resistor.

5FB1

Feedback pin for torch

mode

This pin is used for current sensing in Torch mode – Cathode of the

Flash LED and RTorch resistor are connected to this pin.

6RTBY

MIDDLE FLASH MODE.

7FB2

Feedback pin for flash

mode

8, 10

GND

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.

9COM1

Compensation

connection

Optional external compensation should be connected to these pins.

11

COM2

Compensation

connection

Optional external compensation should be connected to these pins.

12

VBAT

Supply voltage

Supply pin of the device.

13

PVBAT

Power supply voltage

Power supply pin of the device.

14

VLX1A

Inductor connection

External coil is connected between these pins and VLX2. They should

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.

15

VLX1B

16

EN3

Enable Pin 3

Digital input that allows selection of the operational modes of the

device (refer to truth table).

17

EN2

Enable Pin 2

Digital input that allows selection of the operational modes of the

device (refer to truth table).