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Référence fabricant


UC3844B Series 250 kHz High Performance Current Mode PWM Controller - SOIC-8

Product Specification Section
Caractéristiques techniques
Attributes Table
Style d'emballage :  SOIC-8
Méthode de montage : Surface Mount
Fonctionnalités et applications

The UC3844BD1013TR is a high performance current mode PWM controller.

This device 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 mA, 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.


  • Trimmed oscillator for precise fre-quency control
  • Oscillator frequency guaranteed at 250khz
  • Current mode operation to 500khz
  • Automatic feed forward compensation
  • Latching pwm for cycle-by-cycle current limiting
  • Internally trimmed reference with undervoltage lockout
  • High current totem pole output
  • Undervoltage lockout with hysteresis
  • Low start-up and operating current
Pricing Section
2 500
Commande minimale :
2 500
Multiples de :
2 500
Sur commande :
Stock d'usine :Stock d'usine :
687,50 $
Prix Internet
2 500
5 000
10 000
12 500+