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KA7552A - SMPS Controller

General Description

The KA7552A/KA7553A are 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 totempole output for driving a POWER MOSFET.

Key Features

  • Built-in drive circuits for direct connection power MOSFET (lO = ±1.5A).
  • Wide operating frequency range (5kHz ~ 600kHz).
  • Pulse by pulse over current limiting.
  • Over load protection.
  • On/off control by external trigger.
  • Internal UVLO.
  • Low standby current (typ. 90uA).
  • Soft start circuit.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.fairchildsemi.com KA7552A/KA7553A SMPS Controller Features • Built-in drive circuits for direct connection power MOSFET (lO = ±1.5A) • Wide operating frequency range (5kHz ~ 600kHz) • Pulse by pulse over current limiting • Over load protection • On/off control by external trigger • Internal UVLO • Low standby current (typ. 90uA) • Soft start circuit Description The KA7552A/KA7553A are 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 totempole output for driving a POWER MOSFET. Maximum duty of the KA7552A is 70% and the KA7553A is 46%.