UCC2818A-Q1 - 汽车类 BiCMOS 功率因数前置稳压器

UCC2818A-Q1是TI德州仪器公司的一款功率因数校正产品，UCC2818A-Q1是汽车类 BiCMOS 功率因数前置稳压器，本站介绍了UCC2818A-Q1的封装应用图解、特点和优点、功能等，并给出了与UCC2818A-Q1相关的TI元器件型号供参考。

UCC2818A-Q1 - 汽车类 BiCMOS 功率因数前置稳压器 - 功率因数校正 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品特性

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

产品应用

Automotive

产品说明

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 (VCC). It is available in the 16-pin D package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
UCC2818A-Q1	SOIC (16)	9.90 mm × 3.91 mm

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