UC1846-SP

CURRENT-MODE PWM CONTROLLER

1FEATURES •AutomaticFeed-ForwardCompensation •ProgrammablePulse-by-PulseCurrent Limiting •AutomaticSymmetryCorrectioninPush-Pull Configuration •EnhancedLoad-ResponseCharacteristics •ParallelOperationCapabilityforModular PowerSystems •DifferentialCurrent-SenseAmplifi

UC1846-SP

电流模式 PWM 控制器; • QML-V Qualified, SMD 5962-86806\n• 5962P8680603VxA: \n - Radiation Hardness Assurance (RHA) up to 30-krad(Si) Total Ionizing Dose (TID)\n• Passes Functional and Specified Post-Radiation Parametric Limits at 45 krad at LDR (10 mrad(Si)/s) per 1.5× Over Test as Defined in MIL-STD-883 Test Method 1019.9 Paragraph 3.13.3.b\n• Exhibits Low-Dose Rate Sensitivity but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019\n• Automatic Feed-Forward 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% Bandgap Reference\n• Undervoltage Lockout (UVLO)\n• Soft-Start Capability\n• Shutdown Terminal\n• 500-kHz Operation;

The UC1846-SP control devices provide 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.\nProtection circuitry includes built-in UVLO 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.\nOther features include fully latched operation, double-pulse suppression, deadline adjust capability, a ±1% trimmed bandgap reference, and low outputs in the OFF state.\n \n

UC1846-SP

RAD-TOLERANT CLASS-V, CURRENT-MODE PWM CONTROLLER

UC1846-SP

Class-V, Radiation Hardened PWM Controller

UC1846-SP_15

Current-Mode PWM Controller

UC1846-SP_16

Class-V, Radiation Hardened PWM Controller

UC1846-SPRHA

Class-V, Radiation Hardened PWM Controller