PWM Controller programmable frequency upto 600khz

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Overview

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%. When duty is maximum, the input threshold voltage of pin2 & pin8 are not same in KA7552A and KA7553A.

  • Other Consumer Electronics

  • 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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