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AP9234L Datasheet(PDF) 2 Page - Diodes Incorporated |
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AP9234L Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 14 page AP9234L Document number: DS38205 Rev. 1 - 2 2 of 14 www.diodes.com December 2015 © Diodes Incorporated AP9234L Typical Applications Circuit (Note 4) 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 VSS Negative power input. 3 VDD Positive power supply pin, connecting this pin to battery positive pole through R1 4 DS Test Pin, leave it open 5 VM 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 |
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