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See Technical Specifications

UCC2818AD

6kHz-220kHz CCM PFC controller with 10.5V/10V UVLO and Smaller Gate Drive Resistor, -40°C to 85°C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UCC2818AD
Datasheet:

UCC2818AD Datasheet (PDF)
Mode:

Average Current
Frequency - Switching:

6kHz ~ 220kHz
Current - Startup:

150 µA
Voltage - Supply:

12V ~ 17V
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UCC2818AD General Description

The UCC3817A and the UCC3818A family 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 Instruments BiCMOS process, the UCC3817A/UCC3818A 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 UCC3817A/18A family of PFC Controllers is directly pin for pin compatible with the UCC3817/18 family of devices. Only the output stage of UCC3817A family 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 UCC3817A/18A family offers a more robust output stage at the cost of increasing the internal gate resistances. The gate drive of the UC3817A/18A family however remains strong at ±1.2 A of peak current capability.

UCC3817A offers an on-chip shunt regulator with low start-up current, suitable for applications utilizing a bootstrap supply. UCC3818A is intended for applications with a fixed supply (VCC). Both devices are available in the 16-pin D, N and PW packages.

Key Features

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

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)PFC (Power Factor Correction)	Series	-
Mode	Average Current	Frequency - Switching	6kHz ~ 220kHz
Current - Startup	150 µA	Voltage - Supply	12V ~ 17V
Operating Temperature	-40°C ~ 85°C	Mounting Type	Surface Mount
Base Product Number	UCC2818