rt9501 Richtek Technology Corporation, rt9501 Datasheet - Page 3

• Manufacturer Part Number: rt9501
• Description: Advanced Lithium-ion Linear Battery Charger
• Manufacturer: Richtek Technology Corporation

Functional Pin Description
Function Block Diagram
DS9501A/B-08 October 2008
Pin Name
VDD
TS
STAT
GND
CC
FB/CE
CS
BATT
Battery Voltage input. Input directly from battery voltage.
External Feedback Input or Charge Enable Function. Input from controller or finely adjust the battery
regulated voltage with external voltage divider.
Current Sense Input. Charge current is sensed according to the voltage drop from supply voltage to
this pin.
Pin Function
Supply Voltage Input.
Temperature Sense Input. Input from battery temperature monitoring circuit.
Charge Status Output. 3-state status indication of charge, charge complete and temperature fault or
disable or sleep mode.
Charge Control Output. Current output to drive on external PNP transistor or P-Channel MOSFET
for current and voltage regulation.
Ground.
FB/CE
BATT
VDD
TS
& Enable Control
Internal FB
Determination
VDD
Feedback
FB2
TS1 Trip
TS2 Trip
-
+
+
-
+
-
Sleep Mode Detection
Control
Logic
CV
Control
Precharge
Recharge
CC
Control
-
+
-
+
-
+
-
+
FB2
V
FB2
V
REF2
REF4
VDD
FB2
FB2
V
V
REF3
REF1
RT9501A/B
CS
CC
STAT
GND
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