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RT9709 Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT9709
Description  Integrated Over Voltage Protection Circuit
PDF  12 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9709 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9709
2
DS9709-02 April 2011
www.richtek.com
Function Block Diagram
Pin No.
WDFN-12L 4x3
WDFN-10L 3x3
Pin Name
Pin Function
1, 2
1, 2
VIN
Input Power Source Pin.
3
3
GND
Ground Pin.
4
4
WRN
This is an open-drain logic output that turns LOW when any
protection event occurs.
5, 6, 12
5
NC
No Internal Connection.
7
6
EN
Enable Input Pin. Pull this pin to low or leave it floating to
enable the IC. Force this pin to high to disable the IC.
8
7
VB
Battery Voltage Monitoring Input Pin. This pin is connected to
the battery pack positive terminal via resistor.
9
8
ILIM
Over-Current Protection Threshold Setting Pin. Connect a
resistor between this pin and GND to set the OCP threshold.
10, 11
9, 10
VOUT
Output Voltage Pin. Output through the MOSFET.
13 (Expose Pad) 11 (Exposed Pad) GND
The exposed pad must be soldered to a large PCB and
connected to GND for maximum thermal dissipation.
Functional Pin Description
Typical Application Circuit
Control
Logic
Driver
OCP
OCP
Seting
BATOVP
Buffer
OTP
UVLO
INOVP
BASE
VREF
Ibias
VDD
EN
Logic
WRN
GND
VOUT
ILIM
VB
VIN
EN
RT9709/A/B
VIN
VIN
NC
WRN
GND
VOUT
VOUT
ILIM
VB
EN
VIN
CIN
Charger
+
RVB
RILIMIT
Battery
WRN
EN



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