ST3S01PHD

3/17

PIN DESCRIPTION

OPERATING MODE

Pin N°

Symbol

Name and Function

BATTERY pin: input pin when reverse mode is selected; output pin when in

charge or precharge mode

2

CMD-REVERSE Reverse Command pin: Enables the reverse mode when connected to a positive

voltage higher than 1.2V. Logic pin internally pulled down.

3

CMD-PWM

PWM Command pin: allows to control the precharge or charge switch in PWM

mode (refer to the Table 1 for the different operating modes). Logic pin internally

pulled down.

4

CMD-MODE

Mode Command pin: allows to switch between precharge and charge mode (refer

to OPERATING MODES Table). Logic pin internally pulled down.

5

GND

GND Pin

6

CHARGER-OK

CHARGER-OK output pin; open drain N-channel MOSFET that is in high

low. When the reverse function is activated, this open drain have the same

7

FLAG

CHARGER SUPPLY pin: input pin when charge or precharge mode is selected;

output pin when in reverse mode.

CMD-PWM

CMD-MODE

Operating Function Selected

0

0

PRECHARGE MODE (Default state)

0

1

CHARGE MODE

1

0

CHARGE and PRECHARGE switches are open

1

1

CHARGE and PRECHARGE switches are open