UC3846DW Part Information

Details for UC3846DW by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The UC1846/7 family of control devices provides all of the necessary features to implement fixedfrequency, 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-todesign 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 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, doublepulse 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.

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Part Features

  • 500-kHz Operation
  • 500-mA (Peak) Totem-pole Outputs
  • Automatic Feedforward Compensation
  • Automatic Symmetry Correction in Push-Pull Configuration
  • Differential Current Sense Amplifier with Wide Common Mode Range
  • Double-Pulse Suppression
  • Enhanced Load Response Characteristics
  • Parallel Operation Capability for Modular Power Systems
  • Programmable Pulse-by-Pulse Current Limiting
  • Shutdown Terminal
  • Soft-Start Capability
  • Undervoltage Lockout
  • u00b11% Band Gap Reference

Part Specifications

Input Voltage 15V
Output Voltage 5.1V
Output Current 500A
Supply Voltage Min 8V
Supply Voltage Max 40V
Controller IC Case Style SOIC
No. of Pins 16Pins
Frequency 500kHz
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 2 - 1 year
SVHC No SVHC (27-Jun-2018)
Base Number 3846
Controller Type PWM
IC Generic Number 3846
IC Temperature Range Commercial
Logic Function Number 3846
Operating Temperature Range 0°C to +70°C
Output Type Totem Pole
Power Dissipation Pd 1W
Power Supply IC Type PWM controller
Supply Voltage Range 8V to 40V
Termination Type Surface Mount Device

Alternative Part Descriptions

  • IC, CURRENT MODE PWM CTRL, 40V, 16-SOIC; Input Voltage:15V; Output Voltage:5.1V; Output Current:500A; Supply Voltage Min:8V; Supply Voltage Max:40V; Controller IC Case Style:SOIC; No. of Pins:16Pins; Frequency:500kHz; Operating RoHS Compliant: Yes | Newark Electronics
  • Dual ended 500KHz current mode PWM controller, 0C to 70C | Texas Instruments

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