STw4102 STMicroelectronics, STw4102 Datasheet - Page 5

• Manufacturer Part Number: STw4102
• Description: Dual source USB Li-ion charger with gas gauge
• Manufacturer: STMicroelectronics

STw4102
2
Pin assignment
Table 1.
In this table, the following conventions are used:
P
Pin #
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
I: Input
O: Output
I/O: Bidirectional
OD: Open Drain
A: Analog
D: Digital
PWRDETECTN
BATTSENSE
Pin name
Pin descriptions
USBPWR
LDODRV
RESETN
DRIVER
C32KHZ
EOCHG
CVREF
SENSE
LDOFB
STDBY
VOUT
MAIN
TEST
CVIS
ICG+
BATT
ISET
GND
ICG-
SDA
SCL
VIO
Ground
Supply
Supply
Supply
Supply
Type
IO_D
O_A
O_A
O_A
O_A
I_D
I_A
I_A
I_A
I_A
I_A
I_D
I_D
I_D
I_A
I_A
OD
I_D
OD
Power path output
Power supply from USB cable
LDO power PMOS driver
LDO feedback regulation
Resistor to program the main charge current
Bypass capacitor for internal voltage reference
Analog and digital ground
Bypass capacitor for internal supply
Gas gauge sense resistor
Gas gauge sense resistor
External 32kHz clock input
Gas gauge standby input (active low)
Digital register reset (active low)
I
I
Supply for I/O
Sense resistor input to regulate the charge current
Battery power voltage
Battery sense voltage
End of charge output status. Pulled low when the fast
charge current is above 10% of its programmed
maximum value.
Reserved pin for factory test. To be connected to
ground.
Main or USB plug-in detection. Pulled low when power
is detected, open when no power is detected.
Main power input from wall adapter or USB charger
Driver for external power switch (PMOS or PNP)
2
2
C serial data.
C serial clock.
Function
Pin assignment
5/34