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KA3845 - CurrentMode PWM Controller

This page provides the datasheet information for the KA3845, a member of the KA3842 CurrentMode PWM Controller family.

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.

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Datasheet preview – KA3845

Datasheet Details

Part number KA3845
Manufacturer ETC
File Size 554.13 KB
Description CurrentMode PWM Controller
Datasheet download datasheet KA3845 Datasheet
Additional preview pages of the KA3845 datasheet.

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Other Datasheets by ETC
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  • KA3843 - CurrentMode PWM Controller
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Full PDF Text Transcription

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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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