ACT3704
Rev2, 26-Jul-07
ORDERING INFORMATION
PART NUMBER
ACT3704YH
ACT3704YH-T
ACT3704NH-T
TEMPERATURE RANGE
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
PACKAGE
SOP-8/EP
SOP-8/EP
TDFN33-8
PINS
8
8
8
PACKING
TUBE
TAPE & REEL
TAPE & REEL
PIN CONFIGURATION
PIN DESCRIPTIONS
PIN NUMBER
PIN NAME
PIN DESCRIPTION
Open-Drain Charge Status Indicator. nEOC is a high voltage output and can with-
stand up to 12V, allowing it to drive LEDs that are directly connected to IN or to a
lower voltage supply. nEOC features an internal 7mA current limit, allowing this
pin to directly drive an LED for a visual charge-status indicator. For a logic-level
charge status indicator, simply connect a 10kΩ or greater pull-up resistor between
nEOC and a suitable voltage supply.
Charge Termination Voltage Adjust. Connect ADJ to G to select 4.10V termination
voltage or connect ADJ to IN to select 4.20V termination voltage.
Power Input. IN can be withstand operating voltages of up to 12V. Bypass to G
with a 1µF or larger capacitor.
Charge Current Set. Program the maximum charge current by connecting a resis-
tor (R
ISET
) between ISET and G. See the
Charge Current Programming
section for
more information.
Safety Timer program pin. Connect to capacitor C
TIMER
.
Charge Battery Output. Connect this pin to the positive terminal of the battery.
Bypass this pin as close as possible to IC with 1µF ceramic capacitor.
Ground.
Open-Drain Charge Status Indicator. nSTAT can withstand up to 12V, allowing it
to drive LEDs that are directly connected to IN or to a lower voltage supply,
nSTAT features an internal 7mA current limit, allowing this pin to directly drive an
LED for a visual charge-status indicator. For a logic-level charge status indicator,
simply connect a 10kΩ or greater pullup resistor between nSTAT and a suitable
voltage supply.
Exposed Pad. The exposed thermal pad should be connected to board ground
plane and G. The ground plane should include a large exposed copper pad under
the package to connect the entire pad for thermal dissipation (see package out-
line).
-2-
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Copyright © 2007 Active-Semi, Inc.
1
nEOC
2
3
4
5
6
7
ADJ
IN
ISET
TIMER
BAT
G
8
nSTAT
EP
EP
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Active Solutions.
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