ACT3704
Rev2, 26-Jul-07
ORDERING INFORMATION
PART NUMBER
ACT3704YH
TEMPERATURE RANGE
PACKAGE
SOP-8/EP
SOP-8/EP
TDFN33-8
PINS
PACKING
TUBE
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
8
8
8
ACT3704YH-T
ACT3704NH-T
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.
1
nEOC
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.
2
3
ADJ
IN
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 (RISET) between ISET and G. See the Charge Current Programming section for
more information.
4
ISET
5
6
7
TIMER
BAT
G
Safety Timer program pin. Connect to capacitor CTIMER.
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.
8
nSTAT
EP
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).
EP
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