Overview
The UCC28070QPWRQ1 is an advanced power factor correction (PFC) controller produced by Texas Instruments. This device integrates two pulse-width modulators (PWMs) operating 180° out of phase, enabling interleaved continuous conduction mode (CCM) operation. This design significantly reduces input and output ripple currents, making conducted-EMI filtering easier and less expensive. The UCC28070QPWRQ1 features a sophisticated multiplier design that ensures matched average current mode control in both PWM outputs, maintaining a stable, low-distortion sinusoidal input line current. It is particularly suited for automotive applications due to its AEC-Q100 qualification and robust protection features.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (PW) with 20 pins |
| Operating Temperature Range | -40°C to 125°C |
| Operating Supply Current | 20 mA |
| Operating Supply (Max) | 21 V |
| Programmable Frequency Range | 30 kHz to 300 kHz |
| Frequency Dithering Magnitude | 3 kHz to 30 kHz |
| Frequency Dithering Rate | Up to 30 kHz |
| Package Quantity | Carrier 2,000 (LARGE T&R) |
Key Features
- Interleaved Average Current-Mode PWM Control with inherent current matching
- Advanced Current Synthesizer Current Sensing for superior efficiency
- Highly-Linear Multiplier Output with internal quantized voltage feed-forward correction for near-unity PF
- Programmable frequency (30 kHz to 300 kHz) and maximum duty-cycle clamp
- Programmable frequency dithering rate and magnitude for enhanced EMI reduction
- External clock synchronization capability
- Enhanced load and line transient response through voltage amplifier output slew-rate correction
- Programmable peak current limiting
- Bias-supply UVLO, over-voltage protection, open-loop detection, and PFC-enable monitoring
- External PFC-disable interface and open-circuit protection on VSENSE and VINAC pins
- Programmable soft start
Applications
The UCC28070QPWRQ1 is designed for use in automotive and other high-reliability applications where power factor correction is critical. It is particularly useful in systems requiring high efficiency, low total harmonic distortion (THD), and robust protection features. Typical applications include power supplies for automotive systems, industrial power supplies, and any application where interleaved PFC is beneficial for reducing ripple currents and improving overall system performance.
Q & A
- What is the UCC28070QPWRQ1?
The UCC28070QPWRQ1 is an advanced power factor correction (PFC) controller produced by Texas Instruments. - What is the operating temperature range of the UCC28070QPWRQ1?
The operating temperature range is -40°C to 125°C. - What is the package type and pin count of the UCC28070QPWRQ1?
The package type is TSSOP (PW) with 20 pins. - What is the programmable frequency range of the UCC28070QPWRQ1?
The programmable frequency range is 30 kHz to 300 kHz. - Does the UCC28070QPWRQ1 support frequency dithering?
Yes, it supports programmable frequency dithering with a magnitude of 3 kHz to 30 kHz and a rate up to 30 kHz. - What protection features does the UCC28070QPWRQ1 include?
The device includes bias-supply UVLO, over-voltage protection, open-loop detection, PFC-enable monitoring, and open-circuit protection on VSENSE and VINAC pins. - Is the UCC28070QPWRQ1 suitable for automotive applications?
Yes, it is qualified for automotive applications and meets AEC-Q100 standards. - How does the UCC28070QPWRQ1 reduce EMI?
The device reduces EMI through interleaved PWM operation, frequency dithering, and other advanced features. - Can the UCC28070QPWRQ1 be synchronized with an external clock?
Yes, it has an external clock synchronization capability. - What is the purpose of the current synthesizer in the UCC28070QPWRQ1?
The current synthesizer enhances efficiency and performance by providing superior current sensing.
