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KA3843 - CurrentMode PWM Controller

Download the KA3843 datasheet PDF. This datasheet also covers the KA3842 variant, as both devices belong to the same currentmode pwm controller family and are provided as variant models within a single manufacturer datasheet.

Description

controller.

Line and DC to DC converter applications with a minimal external components.

Features

  • Low Start-Up and Operating Current.
  • High Current Totem Pole Output.
  • Undervoltage Lockout With Hysteresis.
  • Operating Frequency Up To 300KHz (384XA) 500KHz (384XAM) BLOCK.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (KA3842-ETC.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number KA3843
Manufacturer Unknown Manufacturer
File Size 554.13 KB
Description CurrentMode PWM Controller
Datasheet download datasheet KA3843 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
KA3843A Current Mode PWM Controller Wing Shing
KA3843AC SMPS Controller Fairchild Semiconductor
KA3843AM Current Mode PWM Controller Wing Shing
KA3843B SMPS Controller Fairchild
KA3842A PWM CONTROLLER Wing Shing Computer Components

Other Datasheets by Unknown Manufacturer

Part Number Description
KA3842 CurrentMode PWM Controller
KA3844 CurrentMode PWM Controller
KA3845 CurrentMode PWM Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
KA3842/43/44/45 Inv № 59 Current Mode PWM Controller July 1995 - revised July 2002 DESCRIPTION KA3842/43/44/45 are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include 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 ideally suited for driving a power MOSFET. Protection circuitry includes built undervoltage lockout and current limiting. The UC3842A(AM) and UC3844A(AM) have UVLO thresholds of 16 V (on) and 10 V (off). The corresponding thresholds for the UC3843A(AM)/45A(AM) are 8.4V (on) and 7.6V (off).
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