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UC3846N .

PWM Controller, 8V-40V supply, 450kHz, 13.5V/500mA out, DIP-16


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UC3846N .
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PWM Controller, 8V-40V supply, 450kHz, 13.5V/500mA out, DIP-16



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Product Overview

The UC3846N is a Current Mode PWM Controller that provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters and the ability to parallel "power modules" while maintaining equal current sharing. Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shut-down function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off. Other features include fully latched operation, double pulse suppression, deadline adjust capability and a ±1% trimmed bandgap reference.
  • Automatic feed forward compensation
  • Programmable pulse-by-pulse current limiting
  • Automatic symmetry correction in push-pull configuration
  • Enhanced load response characteristics
  • Parallel operation capability for modular power systems
  • Differential current sense amplifier with wide common mode range
  • Double pulse suppression
  • 500mA (Peak) totem-pole outputs
  • ±1% bandgap reference
  • Under-voltage lockout
  • Soft-start capability
  • Shutdown terminal
  • Green product and no Sb/Br


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Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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