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MC33348D-3 bảng dữ liệu(PDF) 5 Page - ON Semiconductor |
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MC33348D-3 bảng dữ liệu(HTML) 5 Page - ON Semiconductor |
5 / 12 page MC33348 5 MOTOROLA ANALOG IC DEVICE DATA PROTECTION CIRCUIT OPERATING MODE TABLE Outputs MOSFET Switches Function Input Conditions Cell Status Circuit Operation Battery Pack Status Charge Q1 Discharge Q2 Charge Pump CELL CHARGING/DISCHARGING Storage or Nominal Operation: No current or voltage faults Both Charge MOSFET Q1 and Discharge MOSFET Q2 are on. The battery pack is available for charging or discharging. On On Active CELL CHARGING FAULT/RESET Charge Voltage Limit Fault: VPin 1 ≥ Vth(OV) for 1.0 s Charge MOSFET Q1 is latched off and the cell is disconnected from the charging source. An internal current source pull–up is applied to divider resistors R1 and R2 creating a hysteresis voltage of VH. The battery pack is available for discharging. Discharge current limit protection is disabled. On to Off On Active Charge Voltage Limit Reset: VPin 1 < (Vth(OV) – VH) for 1.0 s Charge MOSFET Q1 will turn on when the voltage across the cell falls sufficiently to overcome hysteresis voltage VH. This can be accomplished by applying a load to the battery pack. Discharge current limit protection is enabled. Off to On On Active CELL DISCHARGING FAULT/RESET Discharge Current Limit Fault: VPin 5 ≥ (VPin 3 + Vth(dschg)) for 3.0 ms and VPin 1 < (Vth(OV) – VH) for 1.0 ms Discharge MOSFET Q2 is latched off and the cell is disconnected from the load. Q2 will remain in the off state as long as VPin 5 exceeds VPin 3 by ≈ Vth(dschg). The battery pack is available for charging. On On to Off Active Discharge Current Limit Reset: VPin 5 – VPin 3 < Vth(dschg) The Sense Enable circuit will reset and turn on discharge MOSFET Q2 when VPin 3 no longer exceeds VPin 5 by ≈ Vth(dschg). This can be accomplished by either disconnecting the load from the battery pack, or by connecting the battery pack to the charger. On Off to On Active Discharge Voltage Limit Fault: VPin 1 ≤ Vth(UV) for three consecutive 1.0 s samples Discharge MOSFET Q2 is latched off, the cells are disconnected from the load, and the protection circuit enters a low current sleepmode state. The battery pack is available for charging. On On to Off Disabled Discharge Voltage Limit Reset: VPin 3 > (VPin 5 + 0.6 V) The Sense Enable circuit will reset and turn on discharge MOSFET Q2 when VPin 3 exceeds VPin 5 by 0.6 V. This can be accomplished by connecting the battery pack to the charger. On Off to On Active FAULTY CELL Discharge Voltage Limit Fault: VPin 1 ≤ 1.5 V This condition can happen if the cell is defective (<1.5 V). The protection circuit logic will not function and the battery pack cannot be charged. Disabled Disabled Disabled |
Số phần tương tự - MC33348D-3 |
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Mô tả tương tự - MC33348D-3 |
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