The UCC2818A-Q1 device 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 in Texas Instrument’s BiCMOS process, the UCC2818A-Q1 device 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 UCC2818A-Q1 PFC controller is directly pin-for-pin compatible with the UCC2818 devices. Only the output stage of UCC2818A-Q1 device has been modified to allow use of a smaller external gate drive resistor values. For some power supply designs where an adequately high enough gate drive resistor can not be used, the UCC2818A-Q1 device offers a more robust output stage at the cost of increasing the internal gate resistances. The gate drive of the UC2818A, however, remains strong at ±1.2 A of peak current capability.

The UCC2818A-Q1 device is intended for applications with a fixed supply (V_CC). It is available in the 16-pin D package.

• Qualified for Automotive Applications
• 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
• Frequency Range of 6 kHz to 220 kHz

• Topology
• Boost
• Control mode
• CCM
• Practical operating frequency (Max) (MHz)
• 0.25
• UVLO thresholds on/off (V)
• 10.5/10
• Device type
• Controllers
• Operating supply current (mA)
• 4
• Features
• 750W Applications, Average Current Mode, Continuous Control Mode , Enable, OVP, Automotive qualified
• Rating
• Automotive
• Operating temperature range (C)
• -40 to 125

UCC2818A-Q1的完整型号有：UCC2818AQDRQ1，以下是这些产品的关键参数及官网采购报价：

UCC2818AQDRQ1，工作温度：-40 to 125，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC2818AQDRQ1的批量USD价格：1.545（1000+）

UCC2818AQDRQ1，工作温度：-40 to 125，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC2818AQDRQ1的批量USD价格：1.545（1000+）