本文介绍了LT3748主要特性,方框图以及25W/12V通信电源,汽车IGBT控制电源,±300V 绝缘反激转换器和输入24-96V输出48V/0.5A 电源。Linear 公司的LT3748是开关电源控制器,特别设计用于绝缘反激拓扑和大功率开关电源。输入电压5V-100V,平均栅极驱动源电流和沉电流1.9A,能驱动低边外接功率MOSFET,不需要第三个绕组或光隔离器,并具有可编的软起动,主要用于绝缘的通信转换器,大功率汽车电源和绝缘工业电源。
LT3748主要特性:
5V to 100V Input Voltage Range
1.9A Average Gate Drive Source and Sink Current
Boundary Mode OperaTIon
No Transformer Third Winding or Opto-Isolator Required for RegulaTIon
Primary-Side Winding Feedback Load RegulaTIon
VOUT Set with Two External Resistors
INTVCC Pin for Control of Gate Driver Voltage
Programmable Soft Start
Programmable Undervoltage Lockout
Available in MSOP Package
LT3748应用:
Isolated Telecom Converters
High Power AutomoTIve Supplies
Isolated Industrial Power Supplies
图1。LT3748方框图
图2。LT3748 25W/12V通信电源框图
图3。LT3748 汽车IGBT控制电源框图
图4。LT3748? ±300V 绝缘反激转换器框图
图5。LT3748 输入24-96V输出48V/0.5A 电源框图