UC2842ANG4

Power Supply Controllers, Monitors Overview

The UC2842ANG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for single-ended power supply topologies including flyback, forward, boost, and buck converters. It operates within an input voltage range of 10V to 30V with a maximum rating of 36V. The device features a fixed switching frequency of 500 kHz and supports a maximum duty cycle of 97%. It provides a high-current output driver capable of sourcing and sinking 1A. The component is housed in an 8-pin PDIP package and functions reliably across an industrial temperature range from -40°C to +85°C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for rapid transient response and simplified loop compensation
• Features a high-current push-pull output stage capable of driving external power switches directly
• Includes integrated oscillator with external timing resistor and capacitor for precise frequency setting
• Provides on-chip undervoltage lockout with hysteresis to prevent operation during low-voltage conditions

Power Supply Controllers, Monitors Applications

• Flyback converter designs for isolated power supplies
• Forward converter applications requiring single-ended topology
• Boost converter circuits for step-up voltage regulation
• Buck converter implementations for step-down voltage conversion

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS standards as per Texas Instruments documentation. Confirm the PDIP-8 through-hole package matches your PCB assembly requirements. Ensure the operating temperature range of -40°C to +85°C aligns with your thermal design constraints. Cross-reference the manufacturer part number against official TI databases to confirm availability and authenticity before procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component when a robust current-mode controller is required for single-ended topologies like flyback or forward converters. The 1A output drive capability allows direct driving of medium-power MOSFETs without additional gate drivers. Consider the 500 kHz fixed frequency for balancing efficiency and component size. Verify that the 97% maximum duty cycle meets the voltage conversion ratio requirements of your specific application design.

Power Supply Controllers, Monitors Part Context

The UC2842ANG4 belongs to the UC2842 series of current-mode PWM controllers from Texas Instruments. This series is widely used in general-purpose power supply designs. The 'AN' designation typically refers to the PDIP-8 through-hole package variant, while 'G4' denotes environmental compliance attributes such as lead-free soldering and RoHS adherence within the manufacturer's product lineup.

Power Supply Controllers, Monitors Replacement Considerations

Compatible substitutes include the UC2842N (standard PDIP-8 version) and UC2842D (SOIC-8 surface mount version). For automotive-grade requirements, consider the UC2842AQDR variant, though it differs in package and temperature specifications. Direct pin-to-pin replacements within the UC2842 family maintain functional compatibility.