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UCC2818-EP

NOT RECOMMENDED FOR NEW DESIGNS

Enhanced Product BiCMOS Power-Factor Preregulator

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Data sheet
UCC2818-EP is not recommended for new designs
This product continues to be available for existing customers. New designs should consider an alternate product.
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Same functionality with different pin-out to the compared device
UCC28180 ACTIVE 18-kHz-250-kHz CCM PFC controller with enhanced startup & transient response Improved iTHD, gate drive, protections, and efficiency with better accuracy

UCC2818-EP

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

Topology Boost, PFC controller Control mode CCM Features < 150 W applications, > 750 W applications, Average current mode, Continuous Control Mode, Enable, Overvoltage protection Duty cycle (max) (%) 100
Topology Boost, PFC controller Control mode CCM Features < 150 W applications, > 750 W applications, Average current mode, Continuous Control Mode, Enable, Overvoltage protection Duty cycle (max) (%) 100
SOIC (D) 16 59.4 mm² 9.9 x 6
  • Controls Boost Preregulator to Near-Unity Power Factor
  • Limits Line Distortion
  • World-Wide Line Operation
  • Overvoltage Protection
  • Accurate Power Limiting
  • Average Current Mode Control
  • Improved Noise Immunity
  • Improved Feed-Forward Line Regulation
  • Leading Edge Modulation
  • 150-µA Typical Start-Up Current
  • Low-Power BiCMOS Operation
  • 12-V to 17-V Operation
  • SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Military (–55°C/125°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

(1) Additional temperature ranges are available - contact factory
Unitrode Is a trademark of Texas Instruments.
  • Controls Boost Preregulator to Near-Unity Power Factor
  • Limits Line Distortion
  • World-Wide Line Operation
  • Overvoltage Protection
  • Accurate Power Limiting
  • Average Current Mode Control
  • Improved Noise Immunity
  • Improved Feed-Forward Line Regulation
  • Leading Edge Modulation
  • 150-µA Typical Start-Up Current
  • Low-Power BiCMOS Operation
  • 12-V to 17-V Operation
  • SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Military (–55°C/125°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

(1) Additional temperature ranges are available - contact factory
Unitrode Is a trademark of Texas Instruments.

The UCC2817 and UCC2818 provides all the functions necessary for active power-factor-corrected preregulators. The controller achieves near-unity power factor by shaping the ac-input line current waveform to correspond to that of the ac input line voltage. Average current mode control maintains stable, low-distortion sinusoidal line current.

Designed with TI’s BiCMOS process, the UCC2817 and UCC2818 offers new features, such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry, a leading-edge modulation technique to reduce ripple current in the bulk capacitor, and an improved, low-offset (±2-mV) current amplifier to reduce distortion at light load conditions.

The UCC2817 offers an on-chip shunt regulator with low start-up current suitable for applications utilizing a bootstrap supply. The UCC2818 is intended for applications with a fixed supply (VCC).

The devices are available in a 16-pin D package.

The UCC2817 and UCC2818 provides all the functions necessary for active power-factor-corrected preregulators. The controller achieves near-unity power factor by shaping the ac-input line current waveform to correspond to that of the ac input line voltage. Average current mode control maintains stable, low-distortion sinusoidal line current.

Designed with TI’s BiCMOS process, the UCC2817 and UCC2818 offers new features, such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry, a leading-edge modulation technique to reduce ripple current in the bulk capacitor, and an improved, low-offset (±2-mV) current amplifier to reduce distortion at light load conditions.

The UCC2817 offers an on-chip shunt regulator with low start-up current suitable for applications utilizing a bootstrap supply. The UCC2818 is intended for applications with a fixed supply (VCC).

The devices are available in a 16-pin D package.
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Technical documentation

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Top documentation Type Title Format options Date
* Radiation & reliability report UCC2818MDREP Reliability Report 26 Aug 2011
* Data sheet UCC2718-EP, UCC2818-EP datasheet 04 Dec 2008

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