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TDA4862 データシート(PDF) 6 Page - Siemens Semiconductor Group |
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TDA4862 データシート(HTML) 6 Page - Siemens Semiconductor Group |
6 / 17 page TDA 4862 Semiconductor Group 6 1998-02-16 Functional Description (cont’d) Undervoltage Lockout An undervoltage lockout circuitry enables the output stage when V CC reaches the upper threshold V CC and terminates the output stage when VCC is falling below the lower threshold V CCL. In the standby mode the supply current is typically 75 µA. An internal clamp has been added from V CC to ground to protect the IC from an overvoltage condition. The external circuitry is created with a start-up resistor connected from V CC to the input supply voltage and a storage capacitor from V CC to ground. Bootstrap power supply is created with the previous mentioned auxiliary winding and a diode. Output The TDA 4862 totem pole output stage is MOSFET compatible. An internal protection circuitry is activated when V CC is within the stand by mode and ensures that the MOSFET is turned-OFF. The totem pole output has been optimized to minimize cross conduction current during high speed operation. The addition of two 4 Ω resistors, one in series with the source output transistor and one in series with the sink output transistor, reduces the cross conduction current. |
同様の部品番号 - TDA4862 |
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同様の説明 - TDA4862 |
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