UC3825NG4 Equivalent & Substitute Parts

Part Overview

The UC3825NG4 is a multi-topology DC-DC controller IC manufactured by Texas Instruments, designed for buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull regulator applications. It provides transistor driver output with positive output configuration and supports step-up, step-down, and step-up/step-down topologies.

The UC3825NG4 is discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

UC3825NG4

Texas InstrumentsIn Stock: 1066UC3825NG4 Datasheet

Current PartRFQ

UC3825N

Texas InstrumentsIn Stock: 2187UC3825N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UC3825NG4 is determined by strict equivalence across the following critical parameters:

• Package and pinout compatibility: 16-DIP (0.300", 7.62mm) through-hole mounting
• Electrical specifications: Supply voltage range 8.4V ~ 30V, switching frequency 340kHz ~ 460kHz, maximum duty cycle 85%
• Functional capability: Multi-topology support (buck, boost, flyback, forward converter, full-bridge, half-bridge, push-pull)
• Output characteristics: Transistor driver output type, positive output configuration, 2 outputs, 1 phase
• Control features: Current limit, enable, frequency control, ramp, soft start
• Operating temperature range: 0°C ~ 70°C
• Compliance: ROHS3 compliant

The UC3825N meets all these criteria and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The UC3825N is the direct substitute for the UC3825NG4. Both parts share identical electrical specifications, package configuration, and functional capabilities. The primary distinction is product status: the UC3825NG4 is discontinued, while the UC3825N maintains active status with current availability.

Selection of the UC3825N ensures compliance with ROHS3 and REACH requirements. The active product status of the UC3825N provides assurance of continued supply chain availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the UC3825N be used as a direct replacement for the UC3825NG4?

A: Yes. The UC3825N is electrically and mechanically equivalent to the UC3825NG4. Both parts feature identical supply voltage range (8.4V ~ 30V), switching frequency (340kHz ~ 460kHz), duty cycle maximum (85%), and 16-DIP package configuration. Pin-for-pin compatibility is maintained.

Q: What is the difference between UC3825NG4 and UC3825N?

A: The UC3825NG4 is discontinued at DiGi Electronics, while the UC3825N maintains active product status. All electrical and mechanical specifications are identical. The suffix designation reflects packaging or date code variations only.

Q: Are there any compliance or certification differences?

A: No. Both the UC3825NG4 and UC3825N are ROHS3 compliant and REACH unaffected. Compliance certifications are equivalent.

Q: What topologies does the UC3825N support?

A: The UC3825N supports buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull topologies. It functions as a multi-topology DC-DC controller with step-up, step-down, and step-up/step-down capability.

Q: Is the UC3825N suitable for my existing UC3825NG4 design?

A: Yes, provided your design operates within the specified parameters: supply voltage 8.4V ~ 30V, switching frequency 340kHz ~ 460kHz, operating temperature 0°C ~ 70°C, and uses the 16-DIP through-hole package. No circuit modifications are required.