ST VIPER38LE 12V 1.25A 15W反激转换器解决方案

ST公司的VIPER38LE是集成了800V功率MOSFET和采用PWM电流模式控制的高压转换器,在轻负载时工作在突发模式有非常低的功耗,因此能满足更严格的节能标准,230Vac时的无负载功耗30mW,两种工作频率60 kHz或115 kHz,主要用在消费类电子和家用电器辅助电源,电表和数据集中器的电源和适配器.本文介绍了VIPER38LE主要特性,框图和典型的反激应用电路,以及评估板STEVAL-ISA153V1主要特性,电路图和材料清单.

The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control. This IC is capable of meeting more stringent energysaving standards as it has very low consumption and operates in burst mode under light load.

The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. The integrated HV startup, sense FET and oscillator with jitter allow the advantage of using minimal components in the application.

The device features high-level protections like dual-level OCP, output overvoltage, short-circuit, and thermal shutdown with hysteresis. After the removal of a fault condition, the IC is automatically restarted.

VIPER38LE主要特性:

800 V avalanche-rugged power MOSFET with embedded HV startup and sense FET
PWM current-mode controller..

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