ACT8846(2013) 查看數據表（PDF） - Active-Semi, Inc
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ACT8846 Datasheet PDF : 40 Pages
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ACT8846
Rev 1, 15-May-13
PIN DESCRIPTIONS CONT’D
PIN
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47,48
EP
NAME
SW4
GP14
SW1
FB1
VP1
nPBIN
PWRHLD
nRSTO
nIRQ
GPIO6
GPIO5
OUT13
OUT7
GPIO4
OUT6
INL1
OUT5
GPIO3
GPIO2
GPIO1
OUT3
VP3
EP
DESCRIPTION
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.
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.
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.1
Drive nPBIN directly to GA to assert a Manual-Reset condition.
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.
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.
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.
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.
REG6 output. Bypass it to ground with a 2.2µF capacitor.
Power Input for REG5, REG6, REG7.
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.
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.
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.
1: Only for ACT8846QM468.
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Copyright © 2013 Active-Semi, Inc.
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