KA7552A

FAIRCHILD SEMICONDUCTOR  KA7552A  控制器, PWM, 30V-10V电源, 135 kHz, 16.5V/100mA输出, DIP-8

The is a PWM Controller programmable frequency up to 600kHz. The KA7552A is switching power control IC for wide operating frequency range. The internal circuits include pulse by pulse current limiting, protection, on/off control by external trigger, low standby current, soft start and high current totem pole output for driving a POWER MOSFET. When duty is maximum, the input threshold voltage of pin2 and pin8 are not same in KA7552A.

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Built-in drive circuits for direct connection POWER MOSFET lO = ±1.5A

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Wide operating frequency range 5 to 600kHz

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Pulse by pulse over-current limiting

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Overload protection

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On/off control by external trigger

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Internal UVLO

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Low standby current typical 90uA

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Soft start circuit