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ACT8712QLEHA-T Datasheet(PDF) 6 Page - Active-Semi, Inc

Part # ACT8712QLEHA-T
Description  Four Channel Integrated Power Management IC for Handheld Portable Equipment
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Manufacturer  ACTIVE-SEMI [Active-Semi, Inc]
Direct Link  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT8712QLEHA-T Datasheet(HTML) 6 Page - Active-Semi, Inc

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Rev0, 25-Feb-08
ACT8712
Innovative Products. Active Solutions.
- 6 -
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ActivePMU
TM is a trademark of Active-Semi.
I
2CTM is a trademark of Philips Electronics.
PIN DESCRIPTIONS CONT’D
PIN
NAME
DESCRIPTION
17
GA
Analog Ground. Connect GA directly to a quiet ground node. Connect GA, GP12, and GP3
together at a single point as close to the IC as possible.
18
FB3
Feedback Sense for REG3. Connect this pin to the LED string current sense resistor to
sense the LED current.
19
OVP3
Over-Voltage Protection Input for REG3. Connect this pin directly to the output node to
sense and prevent over-voltage conditions.
20
GP3
Power Ground for REG3. Connect GP3 directly to a power ground plane. Connect GA,
GP12, and GP3 together at a single point as close to the IC as possible.
21
SW3
Switching Node Output for REG3. Connect this pin to the switching end of the inductor.
22
nSTAT
Active-Low Open-Drain Charger Status Output. nSTAT sinks current whenever the charger
is charging the battery, and is high-Z otherwise. nSTAT has a 6mA (typ) current limit, allow-
ing it to directly drive an indicator LED without additional external components. To generate
a logic-level output, connect nSTAT to an appropriate supply voltage (typically OUT2)
through a 10kΩ or greater pull-up resistor.
23
CHGLEV
Tri-State Charging State Select Input. When ISET1[ ] = [0000], drive CHGLEV to VSYS or
to a logic high for high-current charging mode (maximum charge current of 500mA), and
drive to GA or a logic low for low-current charging mode (maximum charge current of
100mA). Allow CHGLEV to float (|ICHGLEV| < 2µA) to disable the charger.
24
BAT
Battery Charger Output. Connect this pin directly to the battery anode (+ terminal) to sense
the battery voltage.
EP
EP
Exposed Pad. Must be soldered to ground on PCB.


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