ACT81460
Rev 1.0, 18-Dec-2018
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
A1
VIN
VIN power input
System Voltage (system output of smart switch / linear charger). Input voltage to buck
converters
A2/B2
A3/B3
A4
VSYS
VBAT
Charging Power Output pin. Positive side of battery connects to VBAT.
Sense Pin for Battery Voltage. Kelvin connect VBATS close the battery to sense the battery
voltage.
VBATS
A5
A6
A7
B1
OUTL2
OUTL1
VINB2
LDO2 output pin. This is also the LDO2 feedback pin.
LDO1 output pin. This is also the LDO1 feedback pin.
Dedicated input pin for BUCK2
Charge current setting pin. Connect a resistor from ISET to AGND to program the maxi-
mum charge current.
ISET
System Voltage (system output of smart switch / linear charger). Input voltage to buck
converters
A2/B2
VSYS
VBAT
A3/B3
B4
Charging Power Output pin. Positive side of battery connects to VBAT.
Battery temperature sensing input. Connect a negative temperature coefficient thermistor
from TH to AGND. This pin provides a constant current output and the voltage at this pin
is used for temperature calculation.
NTC
B5
B6
B7
C1
C2
C3
C4
C5
VINL2
VINL1
SW2
Dedicated power input pin for LDO2
Dedicated power input pin for LDO1
Switch pin for BUCK2
VBST
ISNS
GPIO2
NC
Boost output pin
Back light LED current sense pin for Boost regulator
GPIO2. Typically defined as nRESET, but can be configured for other functionality.
No Connection, this is floating so it can be tied to the adjacent VIO_IN or left floating
Digital Input Reference Voltage Input. Connect a 0.1uF ceramic capacitor between VIN_IN
and AGND. Used for CMOS output reference voltage.
VIO_IN
FB_B2
C6
C7
Feedback pin for Buck2. Kelvin connect to the Buck2 output capacitors.
Power Ground pin for Buck2. The Buck2 input capacitor must be connected directly to
PGND2.
PGND2
SWBST
D1
D2
Switch pin for Boost Regulator
Power Ground pin for the Buck-Boost and Boost. The Buck-Boost input and output capac-
itors must be connected directly to PGND34. The Boost output capacitors must be directly
connected PGND34. All PGND34 pins must be connected together.
PGND34
D3
D4
D5
D6
D7
GPIO1
SDA
GPIO1. Typically defined as nIRQ, but can be configured for other functionality
I2C Data Input and Output. Needs an external pull up resistor.
I2C Clock Input. Needs an external pull up resistor.
Analog Ground
SCL
AGND
AGND
Analog Ground
Innovative PowerTM
ActiveSwitcherTM is a trademark of Active-Semi
www.active-semi.com
Copyright © 2018 Active-Semi, Inc.
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ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
