FAN5201
3
P
Pin Descriptions
Pin Number
1
2
Pin Name
SDA
IFB
Pin Function Description
Serial Data
. SMBus data I/O.
Current Feedback.
a battery current sense resistor.
Voltage Feedback.
terminals.
Battery.
Output current sense -. Connect this pin to the negative side of a battery
current sense resistor.
Current Compensation.
Frequency compensation for current loop.
Voltage Compensation.
Frequency compensation for voltage loop.
5V Digital Input.
5V internal power.
5V Analog Input.
Connect to 5V power. See Figure 4.
Drive.
Base (gate) drive for external PNP (P-channel MOSFET).
Power Supply.
Power source node, powered either by the AC adapter or by the
battery.
Low Side FET Driver.
Drive for low side switching MOSFET Q4.
Power Ground.
High Side FET Driver.
Drive for high side switching MOSFET Q3.
DC Power Input.
Connect to the AC adapter input.
Soft Start and Current Limit.
Connect to an external MOSFET for limiting inrush
and fault current.
Input Power Sense +.
Connect this pin to the positive side of an adapter current
sense resistor.
Input Power Sense -.
Connect this pin to the negative side of an adapter current
sense resistor.
Input Isolation Drive.
Q2 gate drive. Attach to a P-channel MOSFET to prevent
battery backfeed.
Signal Ground.
Attach all small signal grounds to this pin, and attach the pin to the
ground plane with a single connection.
Power Compensation.
Frequency compensation for power loop.
Soft Start.
Connect to a capacitor to softstart.
Voltage Threshold.
Sets the level at which ACAV trips.
AC Available.
Open collector output signaling that the AC adapter is present.
Serial Clock.
SMBus clock input.
Output current sense +. Connect this pin to the positive side of
3
VFB
Voltage remote sense feedback. Connect this pin to the battery
4
BAT
5
6
7
8
9
CompI
CompV
DIG5V
AM5V
DRV
PSIN
10
11
12
13
14
15
LODRV
PGND
HIDRV
DCIN
SSIN/ILIM
16
PSIN+
17
PSIN-
18
INISO
19
SGND
20
21
22
23
24
CompP
SS
Vth
ACAV
SCL