Linear宣布推出级版本的LTC3722-1,调相全桥直流/直流控制器和自适应或手动零电压开关(ZVS)。设备的ZVS延迟控制和调节同步整流定时优化效率,降低变压器的大小和电磁干扰,使得它非常适合孤立的高功率应用多达数千瓦。
Linear Technology Corporation announces the H-grade version of the LTC3722-1, a phase-modulated full bridge DC/DC controller with adaptive or manual zero voltage switching (ZVS). The device’s ZVS delay control and adjustable synchronous rectification timing optimize efficiency while reducing transformer size and electromagnetic interference, making it well suited for isolated high power applications of up to several kilowatts.
The LTC3722-1’s adaptive zero voltage technology is accomplished by sensing the bridge MOSFETs and input voltage, allowing the converter to adapt to any change in load current, temperature, component tolerances, driver circuitry delay or input voltage variations. Additional features include fixed frequency current mode control, adjustable current limit, leading edge blanking, soft start, short-circuit protection and programmable slope compensation. An accurate 5V low dropout regulator provides up to 15mA to power auxiliary circuits.
The H-grade version operates up to a junction temperature of 150°C, compared to the E- and I-grade versions’
85°C maximum junction temperature. The H-grade product is tested and guaranteed to the maximum junction temperature of 150°C, making it ideal for automotive and industrial applications which are subjected to high ambient temperatures.
The LTC3722-1 is available in an SSOP-24 package. The 1000-piece price starts at 6.24 each for the H-grade device. For more information, visit http://www.linear.com/product/LTC3722.
Summary of Features: LTC3722-1
Adaptive or Manual Zero Voltage Switching
Adjustable Synchronous Rectification
Programmable Leading Edge Blanking
Current Mode Control
Fixed Programmable Operating Frequency from 100kHz to 600kHz
Synchronizable Operating Frequency from 100kHz to 600kHz
Adjustable Current Limit
Soft Start
5V/15mA LDO output
Programmable Slope Compensation
Short-Circuit & Overload Protection
-40°C to 150°C Operating Junction Temp Range
