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STMicroelectronics | UC3843BN

Manufacturer Part #

UC3843BN

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

ECAD Model:
Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 1509
Product Specification Section
STMicroelectronics UC3843BN - 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
Global Stock:
4
USA:
4
On Order:
0
Factory Stock:Factory Stock:
0
Factory Lead Time:
14 Weeks
Minimum Order:
4
Multiple Of:
1
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Tariff charges may apply if shipping to the United States. An estimate of tariff charges will be calculated at checkout.
Total
$1.38
USD
Quantity
Unit Price
75
$0.345
200
$0.34
500
$0.335
2,000
$0.325
5,000+
$0.315
Product Variant Information section
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