DC1909A,演示板采用 LT3840EFE,VIN 介于 4.5V 和 60V 之间,80V 瞬态,Vout = 3.3V @ 20A。演示电路 1909A 是一款 150kHz、60V 电流模式
DC/DC 降压转换器,具有精确的电流限制,采用 LT3840。该电路的工作电压范围为 4.5V 至 60V,可承受 80V
瞬态电压,并在 20A (66W) 电流下输出 3.3V。集成降压-升压开关稳压器为 MOSFET
栅极驱动和 IC 电源生成 7.5V 偏置电源电压,从而通过降低功率损耗来提高整体效率。软启动功能控制启动时的输出电压转换速率,减少电流浪涌和电压过冲
说明
-
DC1909A, Demo Board featuring LT3840EFE VIN between 4.5V and 60V, 80V Transients, Vout = 3.3V @ 20A.Demonstration circuit 1909A is a 150kHz, 60V current mode DC/DC step-down converter with accurate current limit featuring the LT3840. The circuit operates from a VIN range of 4.5V to 60V, survives an 80V transient, and outputs 3.3V at 20A (66W). An integrated buck-boost switching regulator generates a 7.5V bias supply voltage for MOSFET gate drive and IC power to increase the overall efficiency by reducing the power loss. A soft-start feature controls the output voltage slew rate at start-up, reducing current surges and voltage overshoots
主要特色
-
Conversion Type
DC to DC
-
Input Voltage
4.5 to 60 V
-
Output Voltage
3.3 V
-
Output Current
20 A
-
Efficiency
90.5 %
-
Topology
Buck