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UC1842A-SP

Texas Instruments
Part Number UC1842A-SP
Manufacturer Texas Instruments
Description current-mode PWM controller
Published Mar 17, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community UC1842A-SP, UC1844A-SP SLUS872E –...
Datasheet PDF File UC1842A-SP PDF File

UC1842A-SP
UC1842A-SP

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community UC1842A-SP, UC1844A-SP SLUS872E – JANUARY 2009 – REVISED FEBRUARY 2019 UC184xA-SP QML class V, current-mode PWM controller 1 Features •1 QML Class V (QMLV) Qualified, SMD 5962-86704 • Rad-Tolerant: 30-krad(Si) TID (1) (2) • Optimized for Offline and DC-to-DC Converters • Low Start-Up Current (< 0.
5 mA) • Trimmed Oscillator Discharge Current • Automatic Feed Forward Compensation • Pulse-by-Pulse Current Limiting • Enhanced Load Response Characteristics • Undervoltage Lockout (UVLO) With Hysteresis • Double-Pulse Suppression • High-Current Totem-Pole Output • Internally-Trimmed Bandgap Reference • 500-kHz Operation • Low RO Error Amplifier 2 Applications • DC-DC Converters • Supports Various Topologies: – Flyback, Forward, Buck, Boost – Push-Pull, Half-Bridge, Full-Bridge With External Interface Circuit • Available in Military Temperature Range (–55°C to 125°C) 3 Description The UC184xA-SP family of control ICs is a pin-for-pin compatible improved version of the UC184x family.
Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features.
Start-up current is specified to be less than 0.
5 mA and oscillator discharge is trimmed to 8.
3 mA.
During UVLO, the output stage can sink at least 10 mA at less than 1.
2 V for VCC over 5 V.
The Device Comparison Table shows the difference between members of this family.
Reference the individual product data sheets for ordering the radiation-improved version if available.
(1) The LDR improved die is only available in the UC1843A-SP (orderable as 5962-8670409VPA).
Contact factory to request an LDR-improved version of the UC1842A-SP or UC1844ASP.
(2) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad(Si)/s.
Radiation lot acceptance testing is available - contact factory for details.
Device Information(1) PART NUMBER PACKAGE BO...


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