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Home > Semiconductors > Power Management ICs > Switching Converters, Regulators & Controllers > STMicroelectronics UC3844D Current-Mode PWM Controller 1000mA SMD SOIC-14

STMicroelectronics UC3844D Current-Mode PWM Controller 1000mA SMD SOIC-14

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Quick Overview

Sgs - Sgs Uc3844D Ic Cur-Mode P Wm Cont 14-Soic IC

STMicroelectronics UC3844D Current-Mode PWM Controller 1000mA SMD SOIC-14

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STMicroelectronics (SGS-THOMSON Microelectronics) UC3844D Single Output Switching Controller 1000mA SMT / SMD SOIC-14

The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components. These integrated circuits feature 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 for driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off). The UC3843 and UC3845 are 8.5V(on) and 7.9V (off). The UC3842 and UC3843 can operate within 100% duty cycle. The UC3844 and UC3845 can operate with 50% duty cycle.


  • Fixed Frequency Current-Mode PWM Controller
  • Low Start Up Current
  • Maximum Duty Clamp
  • UVLO with Hysteresis
  • Operating Frequency up to 500kHz

Additional Information

Manufacturer: STMicroelectronics
Product Category: Switching Controllers
Brand: Texas Instruments
Topology: Buck, Boost, Flyback, Forward
Number of Outputs: 1 Output
Switching Frequency: 450 kHz
Duty Cycle - Max: 50 %
Output Current: 1000 mA
Maximum Operating Temperature: + 70 C
Mounting Style: SMD/SMT
Package / Case: SOIC-14
Rise / Fall Time: 50 ns
Click here to Download Datasheet I
Click here to Download Datasheet II
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