AN8021L - Panasonic Semiconductor

AN8021L AC-DC switching power supply controller

• AN8021L Pin No. 1 2 3 4 5 6 7 8 9 • AN8021SB Pin No. Symbol 1 2 3 4 5 PGND VOUT PVCC SVCC TIM/OVP Description Grounding pin Power MOSFET direct drive pin Power supply voltage pin Power supply voltage pin Pin for overvoltage protection and timer latch combined use 6 IFB Power supply output photocoupler current feedback signal input pin 7 8 9 2 N.C. N.C. N..

Features

• It operates at a control frequency up to 700 kHz, realizing the output rise time of 35 ns and the output fall time of 25 ns.
• Pre-start operating current is as small as 70 µA (typical) so that it is possible to use a miniaturized start resistor.
• Output block employs totem pole method. The absolute maximum rating of ±1.0 A (peak) allows the direct drive of power MOSFET.
• Built-in pulse-by-pulse overcurrent protection circuit
• Built-in protection circuit against malfunction at low voltage (on/off: 14.2 V/9.2 V)
• Equipped with timer latch function and overvoltage protection circuit.
• Two.