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KA3842B - SMPS Controller

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.

Features

  • Low Start up Current.
  • Maximum Duty Clamp.
  • UVLO With Hysteresis.
  • Operating Frequency up to 500KHz.

📥 Download Datasheet

Datasheet preview – KA3842B

Datasheet Details

Part number KA3842B
Manufacturer Fairchild
File Size 113.30 KB
Description SMPS Controller
Datasheet download datasheet KA3842B Datasheet
Additional preview pages of the KA3842B datasheet.

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Full PDF Text Transcription

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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 (off). The KA3843B and KA3845B are 8.5V (on) and 7.9V (off).
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