UC3846 - SMPS Controller (SER19H)

R22.83

UC3846 Current Mode PWM Controller

The UC3846 control IC 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 module, while maintaining equal current sharing.

Protection circuitry includes built-in-under-voltage lockout and programmable current limit in addition to soft-start capability. A shutdown 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, deadtime adjust capability, and ±2% trimmed bandgap reference. The UC3846 features low outputs in the OFF state.

Features Include:
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 Modulator Power Systems
Differential Current Sense Amplifier with Common Mode Range
Double Pulse Suppression
200mA Totem-Pole Outputs
±2% Band gap Reference
Under-Voltage Lockout
Soft-Start Capability
Shutdown Terminal
500KHz Operation

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  • Model: SER19H
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This product was added to our catalogue on Monday 01 May, 2006.

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