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MC33348 Fiches technique(PDF) 6 Page - ON Semiconductor |
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MC33348 Fiches technique(HTML) 6 Page - ON Semiconductor |
6 / 12 page MC33348 6 MOTOROLA ANALOG IC DEVICE DATA Cell Voltage Sample Switch Over/Under Cell Voltage Detector & Reference Over/Under Data Latch & Control Logic Charge/Discharge Gate Drivers Charge Pump Oscillator Ck Ck En Charge Pump Output 8 Charge Gate Drive Output Discharge Gate Drive Output 4 6 5 Charge Gate Drive Common/ Discharge Current Limit 7 VCC 1 3 Ground R1 R2 R3 1.0 M MC33348 CO 0.01 Discharge Overcurrent Detector 2 Test Discharge Switch Q2 Charge Switch Q1 Cell Voltage 10 5.1 k Sense Enable 2.0 k Figure 7. One Cell Smart Battery Pack Cell CI 0.1 Components CI is mandatory. Refer to the Battery Pack Application text. PIN FUNCTION DESCRIPTION Pin Symbol Description 1 Cell Voltage This input is connected to the positive terminal of the cell for voltage monitoring. Internally, the Cell Voltage Sample Switch applies this voltage to a resistor divider where it is compared by the Cell Voltage Detector to an internal reference. 2 Test This pin is normally not connected and is used in testing the protection IC. An active low at this input resets the internal logic and turns on both MOSFET switches. Upon release, the logic becomes active and the cell voltage is sampled within 1.0 ms. 3 Ground This is the protection IC ground and all voltage ratings are with respect to this pin. 4 Discharge Gate Drive Output This output connects to the gate of discharge switch Q2 allowing it to enable or disable battery pack discharging. 5 Charge Gate Drive Common/Discharge Current Limit This is a multifunction pin that is used to monitor cell discharge current and to provide a gate turn–off path for charge switch Q1. A discharge current limit fault is set when the battery pack load causes the combined voltage drop of charge switch Q1 and discharge switch Q2 to exceed the discharge current limit threshold voltage, Vth(dschg), with respect to Pin 3. 6 Charge Gate Drive Output This output connects to the gate of charge switch Q1 allowing it to enable or disable battery pack charging. 7 VCC This pin is the positive supply voltage for the protection IC. 8 Charge Pump Output This is the charge pump output. A reservoir capacitor is connected from this pin to ground. |
Numéro de pièce similaire - MC33348 |
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Description similaire - MC33348 |
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