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Manufacturer Part #

UC3843BN

UC3843B Series 30 V 17 mA High Performance Current Mode PWM Controller - DIP-8

Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 1509
Product Specification Section
Technical Attributes
Attributes Table
Mounting Method: Through Hole
Features & Applications
The UC3843BN is of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5 A.

A precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the offstate.

Features:

  • Trimmed Oscillator for Precise frequency Control
  • Oscillator Frequency Guaranteed at 250 Hz
  • Current Mode Operation to 500 kHz
  • Automatic Feed Forward Copensation
  • Latching PWM for Cycle-by-cycle Current Limiting
  • Internally Trimmed Reference with Undervoltage lockout
  • High Current totem pole output Undervoltage Lockout With Hystersis
  • Low Start-up and Operating Current
Pricing Section
Stock:
0
Minimum Order:
4,000
Multiple Of:
50
On Order:
0
Factory Stock:Factory Stock:
190,000
Factory Lead Time:
14 Weeks
Total
$1,140.00
USD
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Quantity
Web Price
50
$0.34
250
$0.30
1,500
$0.285
5,000
$0.275
15,000+
$0.27
Product Variant Information section