Overview
The UCC28513DW is a high-performance combination Power Factor Correction (PFC) and Pulse Width Modulation (PWM) controller designed by Texas Instruments. This device is tailored for use in AC-DC power supplies and DC-DC converters, ensuring compliance with IEC1000-3-2 harmonic reduction requirements. By integrating the control and drive signals for both PFC and PWM stages into a single device, it offers significant performance and cost benefits. The UCC28513DW features leading-edge modulation for the PFC stage and trailing-edge modulation for the PWM stage, which minimizes ripple current in the boost capacitor and enhances noise immunity.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOIC (DW) | - |
| Pins | 20 | - |
| Operating Temperature Range | -40 to 105 | °C |
| Switching Frequency (max) | 500 | kHz |
| VCC UVLO Thresholds | 10.2/9.7 | V |
| PWM UVLO Thresholds | 6.75/3.55 | V |
| Maximum Input Voltage (Vin) | 18 | V |
| Maximum Duty Cycle | 100% | - |
| Gate Drive Current | 2A source, 3A sink | - |
| Rise Time (typical) | 16 ns | - |
| Fall Time (typical) | 7 ns | - |
Key Features
- Provides control of PFC and PWM power stages in one device.
- Leading-edge PFC and trailing-edge PWM modulation to reduce ripple current in the boost capacitor.
- Built-in sequencing of PFC and PWM turn-on.
- 2-A source and 3-A sink gate drive for both PFC and PWM stages.
- Average current-mode control for continuous conduction mode operation in PFC stage.
- Highly-linear multiplier for near-unity power factor in PFC stage.
- Input voltage feedforward implementation for improved transient response.
- Peak current-mode control operation in PWM stage.
- Programmable maximum duty cycle and soft-start in PWM stage.
- Overcurrent protection, overvoltage protection, and thermal shutdown.
Applications
The UCC28513DW is suitable for various power management applications, including:
- AC-DC power supplies.
- DC-DC converters.
- High-power applications requiring efficient power factor correction and PWM control.
- Systems needing compliance with IEC1000-3-2 harmonic reduction requirements).
Q & A
- Q: What are the primary functions of the UCC28513DW?
A: The UCC28513DW is a combination PFC and PWM controller, providing control functionality for both power stages in a single device.
- Q: What are the key protection features of the UCC28513DW?
A: The device includes overcurrent protection, overvoltage protection, and thermal shutdown to ensure reliable operation and device protection.
- Q: Is the UCC28513DW suitable for high-power applications?
A: Yes, it is suitable for high-power applications due to its robust design and efficient power management capabilities.
- Q: What is the switching frequency of the UCC28513DW?
A: The maximum switching frequency is 500 kHz.
- Q: What are the UVLO thresholds for the UCC28513DW?
A: The VCC UVLO thresholds are 10.2V/9.7V, and the PWM UVLO thresholds are 6.75V/3.55V.
- Q: What is the operating temperature range of the UCC28513DW?
A: The operating temperature range is -40°C to 105°C.
- Q: Does the UCC28513DW support programmable soft-start and duty cycle?
A: Yes, it supports programmable soft-start and maximum duty cycle clamp.
- Q: What is the package type and pin count of the UCC28513DW?
A: The UCC28513DW comes in a 20-pin SOIC (DW) package.
- Q: How does the UCC28513DW manage modulation for PFC and PWM stages?
A: It uses leading-edge modulation for the PFC stage and trailing-edge modulation for the PWM stage to minimize ripple current in the boost capacitor.
- Q: What are the benefits of using the UCC28513DW in power systems?
A: It offers significant performance and cost benefits by combining PFC and PWM control in one device, and it enhances noise immunity and transient response.
