KA7553A Datasheet PDF - Fairchild

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

●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