Overview
The UCC28180DR from Texas Instruments is a highly versatile and efficient Power-Factor Correction (PFC) controller designed to operate in Continuous Conduction Mode (CCM). This 8-pin controller is tailored for use in universal AC input systems, supporting a wide range of power levels from 100-W to several kilowatts. It is particularly suited for applications requiring high power factor, low current distortion, and excellent voltage regulation in AC-DC front-ends.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Switching Frequency | 18 kHz | - | 250 kHz | - |
| Peak Gate Drive Output | 1.5 A | - | 2 A | - |
| Maximum Duty Cycle | - | 96% | - | - |
| Operating Temperature | -40°C | - | 125°C | - |
| VCC UVLO Threshold | 0.85 V | - | 0.95 V | - |
| ICC Pre-start Current | - | 75 µA | - | - |
| ICC Standby Current | 1.8 mA | 2.4 mA | 3.47 mA | - |
| Package Type | - | SOIC (8) | - | - |
| Body Size | - | 4.90 mm × 3.91 mm | - | - |
Key Features
- Wide range programmable switching frequency (18 kHz to 250 kHz) to support both MOSFET and IGBT switches.
- Trimmed current loop circuits for low iTHD (Total Harmonic Distortion).
- Reduced current sense thresholds to minimize power dissipation in shunts.
- Average current-mode control for low-distortion wave shaping of the input current without input line sensing.
- Integrated 1.5-A and 2-A peak gate drive output, clamped internally at 15.2 V (typical).
- Soft overcurrent and cycle-by-cycle peak current limit protection.
- Output overvoltage protection with hysteresis recovery.
- Audible noise minimization circuitry.
- Open loop detection and enhanced dynamic response during output overvoltage and undervoltage conditions.
- Burst mode for no-load regulation.
- VCC UVLO, low ICC start-up (< 75 µA).
Applications
- Universal AC input systems (100-W to several kilowatts).
- Boost pre-regulators in AC-DC front-ends.
- Industrial power supplies (DIN rail).
- Flat panel displays (PDP, LCD, and LED TVs).
- Refrigerators and other high-power consumer appliances.
Q & A
- What is the primary function of the UCC28180DR? The UCC28180DR is a Power-Factor Correction (PFC) controller designed to operate in Continuous Conduction Mode (CCM) to achieve high power factor, low current distortion, and excellent voltage regulation.
- What is the range of switching frequencies supported by the UCC28180DR? The switching frequency is programmable between 18 kHz and 250 kHz.
- What type of gate drive output does the UCC28180DR provide? The controller provides an integrated 1.5-A and 2-A peak gate drive output, clamped internally at 15.2 V (typical).
- What are the key protection features of the UCC28180DR? Key protection features include soft overcurrent, cycle-by-cycle peak current limit, output overvoltage protection, open loop detection, and VCC UVLO.
- How does the UCC28180DR minimize audible noise? The controller features audible noise minimization circuitry, including a unique VCOMP discharge circuit to avoid encountering overvoltage protection during PWM shutoff.
- What is the operating temperature range of the UCC28180DR? The operating temperature range is -40°C to 125°C.
- What package type is the UCC28180DR available in? The UCC28180DR is available in an SOIC (8) package.
- What are some typical applications for the UCC28180DR? Typical applications include industrial power supplies, flat panel displays, refrigerators, and other high-power consumer appliances.
- How does the UCC28180DR manage low-power standby mode? The user can control low-power standby mode by pulling the VSENSE pin below 0.82 V.
- What is the maximum duty cycle of the UCC28180DR? The maximum duty cycle is typically 96%.
