28070/UCC28070PW اورجینال واردات از Digi-Key اتریش(سفارش اروپا)

نقد و بررسی اجمالی

آیسی محدود کننده فرکانس و کنترل PWM UCC28070A Extended Frequency Range (10 kHz to 300 kHz), Interleaving Continuous Conduction Mode PFC Controller TEXAS INSTRUMENTS TSSOP (20)

ویژگی ها:
تهویه مطبوع و کالاهای سفید
• برنامه های PFC با کلیدهای IGBT
• سرور با بازده بالا و منابع تغذیه رومیزی
• یکسو کننده های مخابراتی
• تجهیزات صنعتی

1 Features
1• Interleaved Average Current-Mode PWM Control
With Inherent Current Matching
• Advanced Current Synthesizer Current Sensing
for Superior Efficiency
• Highly-Linear Multiplier Output With Internal
Quantized Voltage Feed-Forward Correction for
Near-Unity PF
• Extended Range Programmable Frequency
(10 kHz to 300 kHz)
• Programmable Maximum Duty-Cycle Clamp
• Programmable Frequency Dithering Rate and
Magnitude for Enhanced EMI Reduction
– Magnitude: 3 kHz to 30 kHz
– Rate: Up to 30 kHz
• External Clock Synchronization Capability
• Enhanced Load and Line Transient Response
through Voltage Amplifier Output Slew-Rate
Correction
• Programmable Peak Current Limiting
• Bias-Supply UVLO, Overvoltage Protection,
Open‑Loop Detection, and PFC-Enable Monitoring
• External PFC-Disable Interface
• Open-Circuit Protection on VSENSE and
VINAC pins
• Programmable Soft Start
2 Applications
• Air Conditioners and White Goods
• PFC Applications With IGBT Power Switches
• High-Efficiency Server and Desktop Power
Supplies
• Telecom Rectifiers
• Industrial Equipment
3 Description
The UCC28070A device is an extended frequency
range derivative of the UCC28070 device, capable of
operating at low switching frequencies desired for
IGBT power-switch based PFC converters in highpower
applications