ST STEVAL-ISA018V1 150W开关电源解决方案

ST公司的STEVAL-ISA018V1评估板是150W开关电源解决方案,采用高压谐振控制器L6599,输入电压是185V-265VAC或85V-185VAC,输出电压24V+/-2%,输出功率150W,峰值功率240W,安全性满足EN60950,EMI满足EN55014.本文介绍了L6599主要特性,方框图, 采用L6599和L6563 90W适配器电路图以及STEVAL-ISA018V1评估板主要特性,电路图和材料清单.

The L6599 is a double-ended controller specific for the resonant half-bridge topology. It provides 50 % complementary duty cycle: the high-side switch and the low-side switch are driven ONOFF 180° out-of-phase for exactly the same time.

Output voltage regulation is obtained by modulating the operating frequency. A fixed deadtime inserted between the turn-OFF of one switch and the turn-ON of the other one guarantees soft-switching and enables high-frequency operation.

To drive the high-side switch with the bootstrap approach, the IC incorporates a high-voltage floating structure able to withstand more than 600 V with a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode.

The IC enables the designer to set the operating frequency range of the converter by means of an externally programmable oscillator.
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