AP9221 SINGLE CHIP BATTERY PROTECTION SOLUTION FOR 1-CELL Li+ BATTERY PACK Description Pin Assignments The AP9221 is a single-chip protection solution specially designed for (Top View) 1-cell Li+ rechargeable battery pack applications. The AP9221 includes a 1-cell Lithium ion battery protection chip and dual N-CH MOSFET with common drain. 1 S2 6 S1 The AP9221 provides rich battery protection features and can turn-off EP the N-CH MOSFET by detecting overcharge voltage/current, VSS 2 5 VM overdischarge voltage/current, or load short circuit. The AP9221 has NC VDD 3 4 built-in fixed delay time to save external components. The AP9221 is available in the U-DFN2030-6 (Type C) package. U-DFN2030-6 (Type C) Applications Features High Voltage CMOS Process, up to 24V (VDD to VM) Li+ Rechargeable Battery Packs Low Quiescent Current (+25C) In Normal Mode, 3.0A (Typ.), 4.5A (Max.) V = 3.5V DD In Power-Down Mode, 0.1A (Max.) High-Accuracy Voltage Detection Circuit (+25C) Overcharge Detection Voltage: 3.5V to 4.5V (5mV Steps) Accuracy-15mV, +25mV Overcharge Hysteresis Voltage Range: 0.1V to 0.4V (50mV Steps) Accuracy 50mV Overdischarge Detection Voltage: 2.0V to 3.4V (10mV Steps) Accuracy 35mV Overdischarge Hysteresis Voltage Range: 0V to 0.7V (40mV Steps) Accuracy 65mV Discharge Overcurrent Detection Voltage: 0.025V to 0.2V (10mV Steps) Accuracy 12mV Short Current Detection Voltage: 0.12V to 0.45V (50mV Steps) Accuracy 50mV Charge Overcurrent Detection Voltage: -0.2V to -0.025V (10mV Steps) Accuracy 12mV Overcharger Detection Voltage: 8.0V (Fixed) Accuracy 2V Overcharger Release Voltage: 7.3V (Fixed) Accuracy 2V Built-In Fixed Detection Delay Time (+25C), Accuracy 20% Power-Down Mode Selectable (Yes or No) 0V Battery Charge Selectable (Permission or Inhibition) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen- and Antimony-Free. Green Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. AP9221 Typical Applications Circuit (Note 4) P+ R1 330 to 470 3 U1 VDD 5 VM AP9221 C1 (U-DFN2030-6 BAT 100n R2 (Type C)) 2.7k 2 VSS S1 S2 1 6 P- Note: 4. R1 and C1 are used to stabilize the supply voltage of the AP9221. The recommended range of the 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, when first connecting AP9221 system board to the battery, it is necessary to use charger or to short P- to the battery negative polarity. Once the AP9221 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. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the typical value do not exactly guarantee proper operation. Please perform the actual application to set the suitable value through your complete evaluation. 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 supply pin 3 VDD Positive power supply pin, connecting this pin to battery positive pole through R1 4 NC Not connected, leave this pin floating 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. Thermal PAD is common drain of charge and discharge MOSFET, so in PCB layout, prefer to use EP D large copper area to cover this pad for better thermal dissipation, then leave it open. 2 of 16 May 2021 AP9221 Diodes Incorporated www.diodes.com Document number: DS42177 Rev. 3 - 2