UCC28C44P Equivalent & Substitute Parts

Part Overview

The UCC28C44P is an offline PWM controller IC manufactured by Texas Instruments, designed for boost, flyback, and forward converter topologies in DC-DC power management applications. This device operates as a transistor driver with positive output configuration and supports step-up and step-up/step-down conversion functions. The UCC28C44P is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across core electrical parameters and support the same converter topologies while accommodating different packaging options.

Substiute Parts

UCC28C44P

Texas InstrumentsIn Stock: 5706UCC28C44P Datasheet

Current PartRFQ

UCC28C44D

Texas InstrumentsIn Stock: 3869UCC28C44D Datasheet

MFR RecommendedRFQ

UC2844BNG

onsemiIn Stock: 6451UC2844BNG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC28C44P are qualified based on the following core electrical and functional parameters:

Electrical Compatibility Criteria:

• Output type: Transistor Driver
• Function: Step-Up, Step-Up/Step-Down capability
• Output configuration: Positive
• Supported topologies: Boost, Flyback, Forward Converter (minimum)
• Number of outputs: 1
• Output phases: 1
• Duty cycle maximum: 48%
• Control features: Frequency Control

Operational Parameter Ranges:

• Supply voltage range must encompass or match the 9V ~ 18V requirement
• Switching frequency capability must support up to 1MHz operation
• Operating temperature range must cover the application requirements

Compliance & Certification:

• RoHS3 compliance required
• REACH unaffected status required

Substitute parts may differ in mounting type (through-hole versus surface mount), package configuration, switching frequency upper limit, supply voltage range, and operating temperature range, provided the core electrical functions and compliance requirements are maintained.

Parameter Comparison

Engineering Selection Recommendations

UCC28C44D (Texas Instruments): This part maintains identical electrical specifications to the UCC28C44P, including supply voltage range (9V ~ 18V), switching frequency capability (up to 1MHz), and operating temperature range (-40°C ~ 105°C). The primary difference is packaging: UCC28C44D uses 8-SOIC surface-mount configuration versus the through-hole 8-DIP of the UCC28C44P. Both parts are classified as obsolete. Selection of UCC28C44D requires PCB redesign to accommodate surface-mount assembly. RoHS3 and REACH compliance are maintained.

UC2844BNG (onsemi): This part qualifies as a substitute based on matching core electrical functions (transistor driver, step-up/step-up-down capability, positive output, frequency control, 48% maximum duty cycle). UC2844BNG is active product status, providing long-term availability advantage over obsolete alternatives. The part maintains through-hole 8-DIP packaging identical to UCC28C44P, enabling direct board-level substitution without layout modification. Key parameter differences include: supply voltage range extends to 10V ~ 36V (broader than 9V ~ 18V requirement), switching frequency limited to 500kHz (versus 1MHz capability), and operating temperature range of -25°C ~ 85°C (narrower than -40°C ~ 105°C). UC2844BNG adds isolation-capable output configuration. RoHS3 and REACH compliance are maintained. Selection requires verification that application switching frequency does not exceed 500kHz and operating temperature remains within -25°C ~ 85°C bounds.

Frequently Asked Questions (FAQ)

Q: Can UCC28C44D be used as a direct replacement for UCC28C44P?

A: UCC28C44D provides electrical equivalence with identical supply voltage, switching frequency, duty cycle, and operating temperature specifications. However, it uses 8-SOIC surface-mount packaging instead of 8-DIP through-hole packaging. Direct board-level substitution is not possible without PCB redesign and assembly process modification.

Q: What are the key limitations when substituting UC2844BNG for UCC28C44P?

A: UC2844BNG has two operational constraints: maximum switching frequency of 500kHz (versus 1MHz for UCC28C44P) and operating temperature range of -25°C ~ 85°C (versus -40°C ~ 105°C). Applications requiring switching frequencies above 500kHz or operating temperatures below -25°C or above 85°C cannot use UC2844BNG. The part maintains identical through-hole 8-DIP packaging, enabling direct board-level substitution for compatible applications.

Q: Are all substitute parts RoHS3 and REACH compliant?

A: Yes. UCC28C44D, UC2844BNG, and UCC28C44P are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the primary advantage of UC2844BNG over other substitutes?

A: UC2844BNG holds active product status, ensuring ongoing manufacturing and long-term availability. UCC28C44P and UCC28C44D are both classified as obsolete, presenting supply chain risk for future production requirements.

Q: Can UC2844BNG support forward converter topology like UCC28C44P?

A: UC2844BNG supports boost and flyback topologies. Forward converter topology is not listed in the specifications. Applications requiring forward converter operation must use UCC28C44P or UCC28C44D.

Q: What packaging considerations apply to each substitute?

A: UCC28C44P and UC2844BNG both use 8-DIP through-hole packaging (0.300", 7.62mm), permitting direct PCB substitution. UCC28C44D uses 8-SOIC surface-mount packaging (0.154", 3.90mm width), requiring PCB layout and assembly process modification.