Overview
The UCC256301, also known as UCC25630-1DDBR in certain packaging configurations, is a wide VIN LLC (LLC - Inductor-Inductor-Capacitor) resonant controller designed by Texas Instruments. This device is engineered to provide a complete power system when paired with a PFC (Power Factor Correction) stage, utilizing a minimal number of external components. It is optimized for ultra-low standby power consumption and compliance with stringent power efficiency standards such as CoC Tier II.
The UCC256301 features integrated high-voltage gate drivers and is housed in a SOIC16 package with high voltage clearance. It is designed to simplify the design process for LLC converters, offering robust and well-controlled operation with ease of compensation and high efficiency in burst mode.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VIN Input Voltage | - | - | 600 | V |
| VCC Supply Voltage | 13 | 15 | 26 | V |
| VBOOT Driver Bootstrap Voltage | 10 | 12 | 16 | V |
| Operating Frequency Range | 35 kHz | - | 1 MHz | - |
| Internal High-Side Gate Drivers | - | - | 0.6 A, 1.2 A | - |
| Standby Power | - | - | 75 mW | - |
| Operating Ambient Temperature | -40 | - | 125 | °C |
| Junction-to-Ambient Thermal Resistance | - | - | 74.7 | °C/W |
Key Features
- Hybrid Hysteretic Control (HHC): Provides best-in-class line and load transient response and makes the open loop transfer function a first-order system for easy compensation.
- Optimized Low Power Features: Enables 75 mW standby power design with PFC on, helping to meet stringent standby power requirements.
- Advanced Burst Mode: Offers high efficiency with consistent burst power levels, programmable and adaptive to input voltage changes.
- Internal High-Side Gate Drivers: Capable of 0.6 A and 1.2 A, ensuring robust gate drive capabilities.
- Robust Soft Start and Protection Features: Includes robust soft start with no hard switching, over temperature, output over voltage, input over and under voltage protection, and three levels of over current protections.
- Wide Operating Frequency Range: Operates from 35 kHz to 1 MHz, providing flexibility in design.
- High Voltage Clearance: Housed in a SOIC16 package with high voltage clearance, suitable for high-voltage applications.
- WEBENCH Power Designer Compatibility: Allows for custom design using the WEBENCH Power Designer tool.
Applications
- Digital TV SMPS: Suitable for power supply units in digital TVs.
- AC-DC Adapters: Used in high-efficiency AC-DC adapters.
- Power Tools: Applicable in power tools requiring efficient and robust power management.
- LED Lighting Applications: Ideal for LED lighting systems that demand high efficiency and low standby power.
Q & A
- What is the UCC256301?
The UCC256301 is a wide VIN LLC resonant controller designed by Texas Instruments, optimized for ultra-low standby power consumption and high efficiency.
- What are the key features of the UCC256301?
Key features include hybrid hysteretic control, optimized low power features, advanced burst mode, internal high-side gate drivers, robust soft start, and comprehensive protection features.
- What is the operating frequency range of the UCC256301?
The UCC256301 operates within a frequency range of 35 kHz to 1 MHz.
- What is the standby power consumption of the UCC256301?
The UCC256301 enables a standby power design of 75 mW with PFC on.
- What are the protection features of the UCC256301?
The device includes over temperature, output over voltage, input over and under voltage protection, and three levels of over current protections.
- What is the package type and size of the UCC256301?
The UCC256301 is housed in a SOIC16 package with dimensions of 9.9 mm x 3.9 mm.
- Can the UCC256301 be used with the WEBENCH Power Designer tool?
Yes, the UCC256301 is compatible with the WEBENCH Power Designer tool for custom design.
- What are some typical applications of the UCC256301?
Typical applications include digital TV SMPS, AC-DC adapters, power tools, and LED lighting systems.
- How does the UCC256301 handle burst mode operation?
The UCC256301 provides a high-efficient burst mode with consistent burst power levels that are programmable and adaptively change with input voltage.
- What is the thermal performance of the UCC256301?
The device has a junction-to-ambient thermal resistance of 74.7 °C/W.
