原标题：ST VIPER26K 1050V高压转换器解决方案

　　ST公司的VIPER26K是集成了1050V雪崩功率部分和PWM电流模式控制论的高压转换器.1050V- BV功率MOSFET可扩展输入电压范围,同时降低DRAIN缓冲电路的尺寸.器件满足最严格的节能标准,因为它有非常低的功耗和轻负载时工作在突发模式.集成的HV起动,检测FET,误差放大器和抖动振荡器可使得完整的应用具有最少化元件数量.VIPer26K支持大多数开关电源(SMPS)拓扑如带光耦的隔离反激,初级调整,电阻反馈的非隔离反激,降压和降压升压等.漏极电流限额保护500mA, 230 VAC时的待机功耗小于30mW,抖动开关频率降低EMI滤波器成本: 60 kHz ± 4kHz.故障消除后安全自动重起.滞后热关断,内置了软起动以提高系统可靠性.主要用在能量表的SMPS,3相输入工业系统的辅助电源,LED照明和空调.本文介绍了VIPER26K主要特性,框图和基本应用电路图,多种应用电路以及参考设计STEVAL-VP26K01B主要特性,电路图和材料清单.

　　The device is a high voltage converter smartlyintegrating a 1050 V avalanche-rugged powersection, with a PWM current mode control. The1050 V-BV power MOSFET allows to extend inputvoltage range, and reduce the size of the DRAINsnubber circuit. This IC meets the most stringentenergy-saving standards as it has very lowconsumption and operates in burst mode underlight load.

　　The integrated HV startup, sense-FET, erroramplifier and oscillator with jitter allow a completeapplication to be designed with the minimumnumber of components.

　　The VIPer26K supports the most common SMPStopologies such as: isolated flyback withoptocoupler, primary-side regulation, non-isolatedflyback with resistive feedback, buck, and buckboost.

　　VIPER26K主要特性:

　　 1050 V avalanche-rugged power MOSFET

　　 allowing ultra-wide VAC input range to becovered

　　 Embedded HV startup and sense-FET

　　 Current mode PWM controller

　　 Drain current limit protection:

　　 -500 mA (VIPER265K)

　　 -700 mA (VIPER267K)

　　 Jittered switching frequency reduces the EMIfilter cost: 60 kHz ± 4kHz

　　 Standby power < 30 mW at 230 VAC

　　 Embedded E/A with 3.3 V reference

　　 Safe auto-restart after a fault condition

　　 Hysteretic thermal shutdown

　　 Built-in soft-start for improved system reliability

　　VIPER26K应用:

　　 SMPS for energy metering

　　 Auxiliary power supplies for 3-phase inputindustrial systems

　　 LED lighting

　　 Air conditioning

　　图1.VIPER26K框图

　　图2.VIPER26K基本应用电路图

　　图3.VIPER26K次级调整的隔离反激配置电路图

　　图4.VIPER26K初级调整的隔离反激配置电路图

　　图5.VIPER26K非隔离反激配置电路图

　　图6.VIPER26K超宽范围降压配置电路图

　　参考设计STEVAL-VP26K01B

　　15 V / 100 mA high voltage buck converter reference design based on VIPER26K

　　The STEVAL-VP26K01B reference design implements a 15 V-1.5 W buck converter for ultra-wide input voltage range auxiliary power supplies from 60 to 870 VDC or 90 to 600 VAC. The highly compact design offers tight line and load regulation over the entire input and output range.

　　图7.参考设计STEVAL-VP26K01B外形图

　　The board represents a very low cost buck solution based on the new VIPER265KDTR offline high-voltage converter from the VIPerPlus family with 1050 V Power MOSFET and PWM current-mode control. It allows direct connection to ultra-wide range mains without the need for input an voltage limiter and/or stacked MOSFETs, therefore ensuring a minimal BOM.

　　The VIPER265KDTR operates at 60 kHz fixed frequency with frequency jittering to meet the EMC standard requirements.

　　参考设计STEVAL-VP26K01B主要特性:

　　Ultra-wide range: 90–600 VAC or 60–870 VDC

　　Frequency: 50-60 Hz

　　Output voltage: 15 V

　　Output current: 100 mA

　　Very compact size

　　Tight line and load regulation over the entire input and output range

　　Meets IEC55022 Class B conducted EMI even with a reduced EMI filter, thanks to the frequency jittering feature

　　RoHS compliant

　　图8.参考设计STEVAL-VP26K01B电路图

　　参考设计STEVAL-VP26K01B材料清单: