供应 开关电源IC KA7552,KA7553A,KA7553

KA7552A/KA7553A SMPS Controller

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