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GM3844AS8T Datasheet (PDF) - Gamma Microelectronics Inc.

GM3844AS8T Datasheet PDF - Gamma Microelectronics Inc.
Part # GM3844AS8T
Download  GM3844AS8T Download

File Size   628.03 Kbytes
Page   19 Pages
Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.
Description HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

GM3844AS8T Datasheet (PDF)

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GM3844AS8T Datasheet PDF - Gamma Microelectronics Inc.

Part # GM3844AS8T
Download  GM3844AS8T Click to download

File Size   628.03 Kbytes
Page   19 Pages
Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.
Description HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

GM3844AS8T Datasheet (HTML) - Gamma Microelectronics Inc.

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GM3844AS8T Product details

Description
GM384XA series is high performance with fixed frequency current mode PWM controllers. They are specially designed for off-Line and DC-to-DC converter applications with minimum external components. These devices feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output which is suitable for driving MOSFETs.
The under voltage lock-out (U.V.L.O.) is designed to operated with 0.17mA typ. start-up current, allowing an efficient bootstrap supply voltage design. The U.V.L.O. thresholds for the AMC3842A/44A are 16V (on) and 10V (off) which are ideal for off-line applications. The corresponding typical threshold for the GM3843A/45A is 8.4V (on) and 7.6V (off). The GM3842A/43A can operated within 100% duty cycle and the GM3844A/45A can operated within 50% duty cycle.

Features
♦ Low Start-Up and Operating Current
♦ Automatic Feed Forward Compensation
♦ Current Mode Operating Frequency up to 500KHz
♦ Trimmed Oscillator Discharge Current for Precise Duty Cycle Control
♦ Latching PWM for Cycle-By-Cycle Current Limiting
♦ Under Voltage Lockout with Hysteresis
♦ High Current totem Pole Output Stage

Application
   Off-line flyback or forward converters
   DC-to DC buck boost converter
   Monitor Power Supply



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