Part Number
|
KA3843B |
Manufacturer
|
Fairchild |
Description
|
SMPS Controller |
Published
|
Apr 25, 2005 |
Detailed Description
|
www.fairchildsemi.com
KA3842B/KA3843B/KA3844B/ KA3845B
SMPS Controller
Features
• Low Start up Current • Maximum Duty C...
|
Datasheet
|
KA3843B
|
Overview
www.
fairchildsemi.
com
KA3842B/KA3843B/KA3844B/ KA3845B
SMPS Controller
Features
• Low Start up Current • Maximum Duty Clamp • UVLO With Hysteresis • Operating Frequency up to 500KHz
Description
The KA3842B/KA3843B/KA3844B/KA3845B are fixed frequency current-mode PWM controller.
They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components.
These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totempole output for driving a power MOSFET.
The KA3842B and KA3844B have UVLO thresholds of 16V (on) and 10V...
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