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UCC28951PWR

Current Mode PWM Controller 1000kHz 24-Pin TSSOP T/R

Inventory:3,874

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  • 365 Days Quality Guarantee
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  • Part Number : UCC28951PWR

  • Package/Case : TSSOP-24

  • Brands : TI

  • Components Categories : DC DC Switching Controllers

  • Datesheet : UCC28951PWR DataSheet (PDF)

Quick Inquiry

Please submit RFQ for UCC28951PWR or email to us: Email: [email protected], we will contact you in 12 hours.

Overview of UCC28951PWR

The UCC28951 controller is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. The UCC28951 uses advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.

Programmable delays ensure ZVS operation over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.

The 24-pin, TSSOP package complies with RoHS requirements.

Key Features

  • Enhanced zero-voltage switching (ZVS) range
  • Direct synchronous rectifier (SR) control
  • Light-load efficiency management including:
    • Burst mode operation
    • Discontinuous conduction mode (DCM), dynamic SR on/off control with programmable threshold
    • Programmable adaptive delay
  • Average- or peak-current mode control with programmable slope compensation and voltage-mode control
  • Closed-loop soft-start and enable function
  • Programmable switching frequency up to 1 MHz with bidirectional synchronization
  • (±3%) cycle-by-cycle current limit protection with hiccup mode support
  • 150-µA start-up current
  • VDD undervoltage lockout
  • Wide temperature range: –40°C to +125°C

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Topology Phase-shifted full bridge Control mode Current, Peak current mode, Voltage
Duty cycle (max) (%) 97 Switching frequency (max) (kHz) 1000
Features Adjustable switching frequency, Current limiting, Enable/Shutdown, Error amplifier, Green mode, Light-load efficiency, Programmable slope compensation, Soft start, Soft switching, Synchronization pin, Thermal shutdown UVLO thresholds on/off (V) 7.3/6.7
Operating temperature range (°C) -40 to 125 Rating Catalog
Gate drive (typ) (A) 0.2 Vin (max) (V) 17

Warranty & Returns

Warranty, Returns, and Additional Information

  • QA & Return Policy

    Parts Quality Guarantee: 365 days

    Returns for refund: within 90 days

    Returns for Exchange: within 90 days

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