RT9709BGQW データシートの表示（PDF） - Richtek Technology
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RT9709BGQW Datasheet PDF : 12 Pages
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RT9709
Typical Application Circuit
VIN
CIN
WRN
RT9709/A/B
VIN
VOUT
VIN
VOUT
GND
VB
WRN
ILIM
NC
EN
Charger
RVB
+ Battery
EN
RILIMIT
Functional Pin Description
Pin No.
WDFN-12L 4x3 WDFN-10L 3x3
1, 2
1, 2
Pin Name
VIN
Pin Function
Input Power Source Pin.
3
4
5, 6, 12
3
GND
Ground Pin.
This is an open-drain logic output that turns LOW when any
4
WRN
protection event occurs.
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.
Battery Voltage Monitoring Input Pin. This pin is connected to
8
7
VB
the battery pack positive terminal via resistor.
9
10, 11
8
9, 10
ILIM
VOUT
Over-Current Protection Threshold Setting Pin. Connect a
resistor between this pin and GND to set the OCP threshold.
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.
Function Block Diagram
VIN
VOUT
VREF
Ibias
VDD
BASE Driver
OCP
OCP
Seting
ILIM
INOVP
UVLO
Control
Buffer
Logic
BATOVP
VB
EN
EN
Logic
OTP
WRN
GND
www.richtek.com
2
DS9709-02 April 2011
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