onsemi KA7553A
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. When duty is maximum, the input threshold voltage of pin2 & pin8 are not same in KA7552A and KA7553A.| Part No. | KA7553A |
|---|---|
| Datasheet | KA7553A Download |
| Manufacturer |  onsemi |
| Description | SMPS Controller |
| Buy | Stock & Price |
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
Maximum duty of the KA7552A is 70% and the KA7553A is 46%. 8-DIP 1 Internal Block Diagram BIAS OFF (4V) 4.3K 2.8V + - CS 8 0.56 ~ 0.42V + _ + 7V - CT RT 7 1 10uA OSC UVLO 3.6V 2.4V 1.9V + - PWM 0.24V _ + O.C.P R Q S VCC 6 5 OUTPUT 2 3 FB IS(+) 4 GND ©2004 Semiconductor Components Industries, LLC. October-2017, Rev. 2 Publication Order Number: KA7553A/D KA7552A/KA7553AABSOLUTE MAXIMUM RATINGS
Parameter Supply voltage Output current Input voltage at overcurrent detection pin Input voltage at FB pin Input current at CS pin Total power dissipation (Ta = 25°C) Operating temperature Storage temperature range Junction temperatureELECTRICAL CHARACTERISTICS
Symbol VCC IO VIN(IS) VIN(F...
