Manufacturer Part Number
UC3843D8TR
Manufacturer
Texas Instruments
Introduction
The UC3843D8TR is a high-performance fixed frequency current-mode PWM controller.
Product Features and Performance
Fixed Frequency Current-Mode PWM Controller
Highly Efficient Operation
Low Start-Up Current (<1mA)
Trimmed Oscillator for Precise Frequency Control
Oscillator Discharge is Trimmed to 8.3%
Automatic Feed Forward Compensation
PWM Latch for Single-Pulse Per Period
Soft-Start Capability
Product Advantages
Proven Reliability by Texas Instruments
Improved Current Sensing and Reference Accuracy
Enhanced System Performance with Peak Current Mode Control
Internal Error Amplifier with a Low-Noise Margin
Key Technical Parameters
Voltage - Input: -0.3V ~ 6.3V
Voltage - Supply: 12V ~ 28V
Current - Supply: 11 mA
Operating Temperature: 0°C ~ 70°C (TA)
Mounting Type: Surface Mount
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package: 8-SOIC
Quality and Safety Features
Built-In Under-Voltage Lockout
Thermal Shutdown with Hysteresis
Current Limiting
Compatibility
Compatible with a Variety of Switching Power Supply Topologies
Can be used in Flyback, Boost, Buck, Forward Converters
Application Areas
Switch Mode Power Supplies (SMPS)
DC-DC Converters
Battery Chargers
Power Supply for Computer, Consumer and Industrial Equipment
Product Lifecycle
Product Status: Active
Not reported as nearing discontinuation
Replacement or upgrade options available as per Texas Instruments current product portfolio
Several Key Reasons to Choose This Product
Industry-Standard Design for Easy Integration
Wide Operating Voltage Range Suits Multiple Applications
Stable Operation with a Fixed 500 kHz Operating Frequency
Low Standby Power Consumption for Energy-Efficient Power Designs
Ease of Implementation with Minimal External Components Required
Robust Thermal and Overcurrent Protection for Enhanced System Safety
Support and Reliability from a Leading Semiconductor Manufacturer