AP9234L HIGH ACCURACY SINGLE CHIP SOLUTION FOR 1-CELL Li+ BATTERY PACK Description Pin Assignments The AP9234L family is a single-chip protection solution specially (Top View) + designed for 1-cell Li rechargeable battery pack application. + The AP9234L includes a 1-cell high accuracy Li battery protection chip and dual N-CH, ultra low R MOSFET with common drain. SS(ON) 1 S1 6 S2 The AP9234L provides rich battery protection features and can turn- off the N-Channel MOSFET by detecting overcharge voltage/current, EP overdischarge voltage/current, or load short circuit. AP9234 has built- 5 VM 2 VSS in fixed delay time to save external components. 3 VDD 4 DS The AP9234L integrates highly accurate detection circuits and can compensate according to internal MOSFET R performance to SS(ON) ensure extremely high charge/discharge current accuracy under both room and full temperature. U-DFN2535-6 AP9234L is available in U-DFN2535-6 package. Applications Features + High-Voltage CMOS Process, up to 24V (V to V ) DD M Li Rechargeable Battery Pack Low Quiescent Current (+25C ) o Operation Mode: 3.0A Typ. V = 3.5V DD o Power-Down Mode: 0.01A Typ. High Accuracy Voltage Detection (+25C ) o Overcharge Detection Voltage: 3.5V to 4.5V (5mV/step) Accuracy -15mV, +25mV o Overcharge Release Voltage: 3.4V to 4.4V (50mV/step) Accuracy 50mV o Overdischarge Detection Voltage: 2.0V to 3.4V (10mV/step) Accuracy 35mV o Overdischarge Release Voltage: 2.7V to 3.4V (40mV/step) Accuracy 65mV (No Power-down Mode) o Discharge Overcurrent Detection Voltage: 0.03V to 0.19V (10mV/step) Accuracy 12mV o Short Current Detection Voltage: 0.16V to 0.32V (50mV/step) Accuracy 50mV o Charge Overcurrent Detection Voltage: -0.19V to -0.03V (10mV/step) Accuracy 12mV o Over Charger Detection Voltage: 8.0V (fixed) Accuracy 2.0V o Over Charger Release Voltage: 7.3V (fixed) Accuracy 2.0V High Accuracy Current Detection (+25C ) Charge/Discharge current limit: 2A Built-in Delay Time (+25C ), Accuracy 20% Auto-wake-up Function (No Power Down) 0V Battery Charge Selectable (Permission or Inhibition) Overcharge Protection Mode Selectable (Auto Release or Latch) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP9234L Typical Applications Circuit (Note 4) B+ P+ R1 330 to 470 DS VDD C2 U1 100nF AP9234L (Option) C1 (U-DFN2535-6) BAT VM 100nF VSS R2 2.7k S1 S2 B- P- C3 100nF (Option) Note: 4. R1 and C1 are used to stabilize the supply voltage of the AP9234L. The recommended range of R1 value is 330 to 470 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 and 4k, typical value is 2.7k. 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 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 V Negative power input. SS 3 V Positive power supply pin, connecting this pin to battery positive pole through R1 DD 4 DS Test Pin, leave it open 5 V Charger negative input pin, short this pin to S2 pin through R2 M 6 S2 Source pin of charging MOSFET, connecting this pin to charge negative input Exposed PAD is common drain of charge and discharge MOSFET, so in PCB layout, prefer to use large EP D copper area to cover this pad for better thermal dissipation, then leave it open 2 of 14 AP9234L December 2015 Diodes Incorporated www.diodes.com Document number: DS38205 Rev. 1 - 2 ADVANCED INFORMATION