The UC1846/7 family of control devices 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 while maintaining equal current sharing. \
●Protection circuitry includes built-in undervoltage 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, deadline adjust capability, and a ±1% trimmed band gap reference.
●The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.
● Automatic Feedforward 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
● 500-mA (Peak) Totem-pole Outputs
● ±1% Band Gap Reference
● Undervoltage Lockout
● Soft-Start Capability
● Shutdown Terminal
● 500-kHz Operation
