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
KA7500C_Q
KA7500C_Q

Fairchild Semiconductor

DC/DC Switching Controllers SMPS Controller

Data Sheet

0-1: $0.17
1-25: $0.17
25-100: $0.16
100-250: $0.16
KA7515
KA7515

Fairchild Semiconductor

Other Power Management SMPS Controller

Data Sheet

Negotiable 
KA75250ZTA
KA75250ZTA

Fairchild Semiconductor

Supervisory Circuits Voltage Detector 2.5V

Data Sheet

Negotiable 
KA75330ZTA
KA75330ZTA

Fairchild Semiconductor

Supervisory Circuits Voltage Detector 3.3V

Data Sheet

0-1: $0.28
1-25: $0.16
25-100: $0.12
100-250: $0.09
KA75360ZTA
KA75360ZTA

Fairchild Semiconductor

Supervisory Circuits Voltage Detector 3.6V

Data Sheet

Negotiable 
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