UC3846

SMPS Controller

Features •AutomaticFeedForwardCompensation •ProgrammablePulsebyPulseCurrentLimiting •AutomaticSymmetryCorrectioninPush-PullConfiguration •EnhancedLoadResponseCharacteristics •ParallelOperationCapabilityforModulatorPowerSystems •DifferentialCurrentSen

UC3846

温度范围为 0°C 至 70°C 的双端 500KHz 电流模式 PWM 控制器; • Automatic Feedforward Compensation\n• Programmable Pulse-by-Pulse Current Limiting\n• Automatic Symmetry Correction in Push-Pull Configuration\n• Enhanced Load Response Characteristics\n• Parallel Operation Capability for Modular Power Systems\n• Differential Current Sense Amplifier with Wide Common Mode Range\n• Double-Pulse Suppression\n• 500-mA (Peak) Totem-pole Outputs\n• ±1% Band Gap Reference\n• Undervoltage Lockout\n• Soft-Start Capability\n• Shutdown Terminal\n• 500-kHz Operation;

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. \\\n\nProtection 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.\n\n Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference. \n\nThe UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

UC3846

SMPS Controller;

UC3846

Current Mode PWM Controller

UC3846

Current Mode PWM Controller

UC3846

Current Mode PWM Controller

UC3846

Current Mode PWM Controller

UC3846

Current Mode PWM Controller

UC3846

LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

UC3846

Current Mode PWM Controller