ACT510x
Rev 1.0, 04-Apr-2018
PIN DESCRIPTIONS
PIN
NAME Type
DESCRIPTION
1, 9, 32
AGND
NC
P
I
Analog ground of the IC.
No connect
2
3
INTBP
O
Internal Bypass - This should be connected to a 100nF ceramic capacitor
Internal VREG LDO output. The output voltage is programmable from 2V to 5V. Connect
a 1.0uF to this pin. The maximum current capability for this pin is 100mA. The internal
Overcurrent and over temp circuit shut down the converter when VREG is overloaded.
4
VREG
I
5, 20
6
PGND
SDA
SCL
EN
P
Power ground of the IC.
I/O I2C Interface data.
7
I
I
I
I2C Interface clock.
8
Converter enable Input. The converter is active when this pin is pull low.
Interrupt IRQ open drain output.
10
nIRQ
Input maxim current setting pin. Connect a resistor from ILIM to AGND to program the
maxim input current.
11
ILIM
I
12
13
14
VINS
ISRN
ISRP
I
I
I
VIN Sense Input
Negative input current sense amplifier inputs. Sense resistor is optional.
Positive input current sense amplifier inputs.
High Side Bias Pin. This provides power to the internal high-side MOSFET gate driver.
Connect a 47nF capacitor from HSB2 pin to SW2 pin.
15
HSB2
P
16, 17
18, 19
21, 22
23, 24
VIN
SW2
SW1
VOUT
P
P
P
P
Input power pins. Decoupling capacitor should be placed from this pin to PGND.
Power switching output node to external inductor.
Power switching output node to external inductor.
Output pins. Decoupling capacitor should be placed from this pin to PGND.
High Side Bias Pin. This provides power to the internal high-side MOSFET gate driver.
Connect a 47nF capacitor from HSB1 pin to SW1 pin.
25
HSB1
P
26
27
OSRP
OSRN
I
I
Output current sense resistor positive input.
Output current sense resistor negative input.
Open drain status output to indicate various charger operation. A LOW indicates con-
verter is running. If converter is disabled for any reason, such as VOUT fault or VIN UV
etc., STAT will go high.
28
29
STAT
O
Output constant current limit setting pin. Connect a resistor from OLIM to AGND to pro-
gram the output current.
OLIM
A2D
I
I
30
A2D Input Pin
(ACT5101)
30
FB
I
Input FB pin
(ACT5102)
31
COMP
O
P
Error Amplifier Output. This pin is used to compensate the converter.
Exposed pad. Must be shorted to ground on the PCB.
Power
Pad
3
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