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Product Detailed Parameters
- Description：IC PFC CTR AVERAGE 200KHZ 20SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Mode：Average Current
- Frequency - Switching：200kHz
- Voltage - Supply：9.7V ~ 18V
- Operating Temperature：-40°C ~ 105°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Current - Startup：100 µA
- Grade：-
- Qualification：-
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Overview
The UCC28512DWR is an advanced PFC/PWM combination controller from Texas Instruments, designed for high-efficiency power supplies. It integrates a Power Factor Correction (PFC) stage and a PWM stage in a single package. The device operates within a temperature range of -40°C to +105°C and utilizes a 20-pin SOIC (DW) package. Key electrical parameters include a switching frequency of 200 kHz, an operating supply current of 4 mA, and a maximum operating voltage of 18 V. It features specific UVLO thresholds: 16V/9.7V for VCC and 6.75V/3.55V for PWM, with a 1:1 frequency ratio between stages.
Feature Summary
- Integrates both PFC and PWM control functions into a single component to reduce system complexity.
- Provides independent undervoltage lockout (UVLO) thresholds for the VCC and PWM sections to ensure stable startup and operation.
- Maintains a fixed 1:1 frequency ratio between the PFC and PWM stages for synchronized control.
Applications
- High-efficiency AC-DC power adapters
- Computer and notebook power supplies
- Telecommunications equipment power systems
Procurement Notes
Verify the exact suffix 'DWR' corresponds to the tape-and-reel packaging variant when ordering. Confirm that the 20-SOIC footprint matches your PCB layout requirements. Ensure the thermal management design supports the specified junction temperature range up to 105°C. Cross-reference the datasheet revision date to confirm compatibility with your specific application notes.
Selection Notes
Select this component when a compact solution integrating both PFC and PWM control is required. It is suitable for designs needing a fixed frequency ratio between stages. Consider the 20-pin SOIC package constraints and the 200 kHz switching frequency limitations. Evaluate the 4 mA supply current against your standby power requirements.
Part Context
This part belongs to the UCC28512 family of advanced PFC/PWM combination controllers. It is manufactured by Texas Instruments under the PMIC category. The 'DWR' suffix indicates the specific package type (SOIC) and reel quantity configuration. It serves as a monolithic alternative to discrete PFC and PWM controller solutions.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility and electrical parameter overlaps with potential alternatives before substitution.
FAQ
What is the relationship between the PFC and PWM switching frequencies?
The UCC28512DWR maintains a fixed 1:1 frequency ratio between the PFC and PWM stages.
What are the UVLO thresholds for the VCC and PWM sections?
The device features 16V/9.7V UVLO for VCC and 6.75V/3.55V UVLO for the PWM section.
