The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.

• Prebiased Start-up
• Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
• Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
• Primary or Secondary-Side Control
• 3.3-V, 1.5% Accurate Reference Output
• 1-MHz Capable Switching Frequency
• 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
• Programmable Soft-Start and Hiccup Restart Timer
• Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package

• Topology
• Forward, Full-Bridge, Half-Bridge, Push-Pull
• Duty cycle (Max) (%)
• 100
• Supply voltage (Max) (V)
• 17
• UVLO thresholds on/off (V)
• 4.3/4.1
• Features
• Current Limiting, HV Start-up, SR Logic
• Operating temperature range (C)
• -40 to 125
• Rating
• Catalog
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 0.2

UCC28250的完整型号有：UCC28250PW、UCC28250PWR、UCC28250RGPR、UCC28250RGPT，以下是这些产品的关键参数及官网采购报价：

UCC28250PW，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：70个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28250PW的批量USD价格：1.884（1000+）

UCC28250PWR，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28250PWR的批量USD价格：1.57（1000+）

UCC28250RGPR，工作温度：-40 to 125，封装：QFN (RGP)-20，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC28250RGPR的批量USD价格：1.57（1000+）

UCC28250RGPT，工作温度：-40 to 125，封装：QFN (RGP)-20，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC28250RGPT的批量USD价格：1.884（1000+）

UCC28250EVM-501 — 用于初级侧控制中的 UCC28250 高级 PWM 控制器的评估模块

The UCC28250EVM-501 is a fully assembled and tested circuit for evaluating the UCC28250 Advanced PWM Controller with Pre-Bias Operation. The UCC28250EVM-501 comprises a symmetrical half-bridge DC/DC converter, which converts a 36V to 72V DC input to a 3.3V DC output with a maximum 75W output power.

UCC28250EVM-564 — 用于在二次侧控制中具有预偏置负载操作的 UCC28250 高级 PWM 控制器的评估模块

UCC28250EVM-564 是一块完全组装且经过测试的电路板，用于评估具有偏预置操作的 UCC28250 高级 PWM 控制器。UCC28250EVM-564 包含一个对称半桥接 DC-DC 转换器，该转换器可以将 36V 至 75V 直流输入电压转换成 3.3V 的直流输出电压，提供 100W 的最大输出功率。

UCC28250 Unencrypted PSPICE Average Model Package (Rev. A)

PMP8878 是基于 UCC28250 高级 PWM 控制器的全功能 1/8 砖型隔离式直流/直流电信电源模块。参考设计采用次级侧控制和硬开关全桥电源拓扑，可在 40V-75V 输入源宽范围内运行时提供 12V/180W 输出功率。该参考设计的亮点包括：95% 峰值效率、预偏置启动、过热保护和过流保护（间断模式）。偏置电源块采用 UCC25230，而该设计中采用的闸极驱动器包括用于驱动 SR MOSFET 的 UCC27324 和用于驱动初级侧半桥 MOSFET 的 UCC27201。