AP9234L

Document number: DS38205 Rev. 1 - 2

2 of 14

www.diodes.com

December 2015

© Diodes Incorporated

AP9234L

U1

AP9234L

(U-DFN2535-6)

BAT

P+

C1

100nF

R2

2.7kΩ

P-

VDD

VSS

S1

S2

VM

B+

B-

C3 100nF

(Option)

DS

C2

100nF

(Option)

R1

330Ω to 470Ω

Note: 4. R1 and C1 are used to stabilize the supply voltage of the AP9234L. The recommended range of R1 value is

330Ω to 470Ω and C1 value is 10nF to 1000nF,

typical value is 100nF. R2 should be connected between P- to VM sense terminal to monitor the status of charger and the charge/discharge current. The R2

should be between 300

Ω and 4kΩ, typical value is 2.7kΩ. R1 and R2 are also used as current limit resistors if the battery or charger is connected reversely.

Polarity reversing may cause the power consumption of R1 and R2 to go over their power dissipation rating, therefore R1 and R2 values should be selected

appropriately for the actual application. If R2 is more than 4k

Ω resistor, charge may not be off due to the voltage drop on R2.

For power down mode (please contact Diodes Inc. sales team), when first connecting AP9234L system board to the battery, it is necessary to use charger or

to short P- to the battery negative polarity. Once the AP9234L is activated, the charger or connection can be removed, otherwise the battery cannot discharge

current through system board.

The values selected should follow the recommended typical range mentioned above.

Pin Descriptions

Pin Number

Pin Name

Function

1

S1

Source pin of discharging MOSFET, connecting this pin to battery negative pole

2

Negative power input.

3

Positive power supply pin, connecting this pin to battery positive pole through R1

4

DS

Test Pin, leave it open

5

Charger negative input pin, short this pin to S2 pin through R2

6

S2

Source pin of charging MOSFET, connecting this pin to charge negative input

EP

D

Exposed PAD is common drain of charge and discharge MOSFET, so in PCB layout, prefer to use large

copper area to cover this pad for better thermal dissipation, then leave it open