Product Summary

The KA7553 is a PWM controller. Tho KA7553 is switching power control 1C for wido 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 cciirent totempole output for driving a POWER MOS-FET. Maximum duty of the KA7552 is 70% anrt the KA7553 is 46%. When duty is maximum, the input threshold vollacje of pin8 are not samo in KA7553.

Parametrics

KA7553 absolute maximum ratings: (1)Supply Voltajje VCC: 30V; (2)Output CurrGnt lo: 1.5A; (3)Input Voltage at Overourrent Detection Pm Virj: - 0.3 to 4V; (4)Input Voltage al FB Pin FBj: 4V; (5)Input Current al OS Pinih: 2mA; (6)Talal Power Dissipalion(Ta - 2SX-)Pd: 800mW; (7)Operating Temperature Topr: - 25 to 85℃.

Features

KA7553 features: (1)Built-in Drive Circuits for Direct Connection POWER MOSFET (l0= =1-5A); (2)Wide Operating Frequency Range (5KHz - 600KHz); (3)Pulse By Pulse Over Current Limiting; (4)Over Load Protection; (5)On/Off Conlrol By External Trigger; (6)Internal UVLO » Low Standby Current {Typ. 90uA); (7)Soft Start Circuit.

Diagrams

KA7553 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
KA7553A
KA7553A

Fairchild Semiconductor

Switching Converters, Regulators & Controllers SMPS Controller

Data Sheet

0-1900: $0.17
1900-2000: $0.16
2000-5000: $0.14
5000-10000: $0.14
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
KA7553A
KA7553A

Fairchild Semiconductor

Switching Converters, Regulators & Controllers SMPS Controller

Data Sheet

0-1900: $0.17
1900-2000: $0.16
2000-5000: $0.14
5000-10000: $0.14
KA75XXX
KA75XXX

Other


Data Sheet

Negotiable 
KA75450Z
KA75450Z

Other


Data Sheet

Negotiable 
KA75420Z
KA75420Z

Other


Data Sheet

Negotiable 
KA7540DTF
KA7540DTF

Fairchild Semiconductor

Switching Converters, Regulators & Controllers

Data Sheet

Negotiable 
KA7540D
KA7540D

Fairchild Semiconductor

Switching Converters, Regulators & Controllers

Data Sheet

Negotiable