ACT8846
Rev 4, 25-May-16
PIN DESCRIPTIONS CONT’D
PIN
NAME
DESCRIPTION
26
SW4
Switch Node for REG4.
Power Ground for REG1 and REG4. Connect GP14, GP2, GP3, and GA together at a
single point as close to the IC as possible.
27
28
GP14
SW1
Switch Node for REG1.
Output Feedback Sense for REG1. For the adjustable output voltage options, connect
this pin to the center of the output feedback resistor divider for voltage setting,
connect this pin to the output directly to regulate the output voltage at 1.2V.
29
30
31
32
FB1
VP1
Power Input for REG1. Bypass to GP14 with a high quality ceramic capacitor placed
as close to the IC as possible.
Master Enable Input. Drive nPBIN to GA through a 50kΩ resistor for 32ms to enable
the IC. Drive nPBIN to GA through a 50kΩ resistor for 10 seconds to disable the IC.
Drive nPBIN directly to GA to assert a Manual-Reset condition.
nPBIN
PWRHLD
Power Hold Input, enable input for REG1, REG2, REG4, REG5, REG6, REG8 and
REG10. PWRHLD is internally pulled down to GA through a 900kΩ resistor.
33
34
nRSTO
nIRQ
Open-Drain Reset Output.
Open-Drain Interrupt Output.
General Purpose I/O #6. Configured as PWM LED driver output for up to 6mA current
with programmable frequency and duty cycle. See the PWM LED Drive section for
more information.
35
36
GPIO6
GPIO5
General Purpose I/O #5. Configured as PWM LED driver output for up to 6mA current
with programmable frequency and duty cycle. See the PWM LED Driver section for
more information.
37
38
OUT13
OUT7
REG13 output. Bypass it to ground with a 0.47µF capacitor.
REG7 output. Bypass it to ground with a 2.2µF capacitor.
General Purpose I/O #4. Configured as PWM LED driver output for up to 6mA current
with programmable frequency and duty cycle. See the PWM LED Driver section for
more information.
39
GPIO4
40
41
42
OUT6
INL1
REG6 output. Bypass it to ground with a 2.2µF capacitor.
Power Input for REG5, REG6, REG7.
OUT5
REG5 output. Bypass it to ground with a 2.2µF capacitor.
General Purpose I/O #3. Configured as PWM LED driver output for up to 6mA current
with programmable frequency and duty cycle. See the PWM LED Drier section for
more information.
43
44
45
GPIO3
GPIO2
GPIO1
General Purpose I/O #2. Configured as VSELR4 for Voltage Selection of REG4. Drive
to logic low to select default output voltage. Drive to logic high to select secondary
output voltage.
General Purpose I/O #1. Configured as VSELR3 for Voltage Selection of REG3. Drive
to logic low to select default output voltage. Drive to logic high to select secondary
output voltage.
46
47,48
EP
OUT3
VP3
EP
Output Voltage Sense for REG3.
Power input for REG3. Bypass to GP3 with a high quality ceramic capacitor placed as
close to the IC as possible.
Exposed Pad. Must be soldered to ground on PCB.
: Only for ACT8846QM468.
Innovative PowerTM
- 6 -
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