UCC28250 具有预偏置操作的高级 PWM 控制器

描述

UCC28250 PWM控制器专为高功率密度应用而设计，可能具有严格的预偏置启动要求。集成的同步整流器控制输出具有高效率和高性能拓扑结构，如半桥，全桥，交错前向和推挽式。与UCC28250配合使用的UCC27200半桥驱动器和UCC2732X MOSFET驱动器提供完整的电源转换器解决方案。

外部可编程软启动，与内部预偏置启动电路配合使用，允许控制器在所有输出条件下逐渐达到稳态工作点。 UCC28250可配置为初级或次级侧控制，可实现电压或电流模式控制。

振荡器工作频率高达2 MHz，可与外部时钟同步。输入电压前馈，逐周期电流限制和可编程的打字机允许系统保持在安全的操作范围内。可以实现输入电压，输出电压和温度保护。初级侧开关和次级侧同步整流器之间的死区时间可以独立编程。

所有商标均为其各自所有者的财产。


Topology
Control Method
Vin (Min) (V)
Vin (Max) (V)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Duty Cycle (Max) (%)
Gate Drive (Typ) (A)
Features
Rating
Operating Temperature Range (C)
Pin/Package

UCC28250	LM5035B	LM5035C	LM5036	LM5039	UCC28251
Forward Full-Bridge Half-Bridge Push-Pull	Half-Bridge	Half-Bridge Push-Pull	Full-Bridge Half-Bridge Push-Pull	Full-Bridge Half-Bridge Push-Pull	Forward Full-Bridge Half-Bridge Push-Pull
Current Voltage	Feedforward Voltage	Feedforward Voltage	Feedforward Voltage	Voltage	Current Feedforward Voltage
4.3	13	13	18	13	4.3
20	105	105	100	105	20
1000	2000	2000	2000	2000	1000
4.3/4.1	Programmable/1.25V	Programmable/1.25V	Programmable/1.25V	Programmable/1.25V	4.3/4.1
100	50	50	50	50	100
0.2	2	2	2	2	0.2
HV Start-up	Multi-topology Synchronization Pin	Synchronization Pin	Current Limiting Frequency Synchronization HV Start-up Input Line Monitor Integrated Switch Leading Edge Blanking Multi-topology Soft Start Synchronization Pin Thermal Shutdown Wide DC input	Multi-topology Synchronization Pin	Leading Edge Blanking Multi-topology Programmable Slope Compensation Soft Start Synchronization Pin
Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
20QFN 20TSSOP	20HTSSOP 24WQFN	20HTSSOP 24WQFN	28WQFN	20HTSSOP 24WQFN	20QFN 20TSSOP

数据手册（1）

元器件购买 UCC28250 相关库存