产品概述
描述
The STEVAL-ISA123V1 demonstration board implements an isolated flyback double output (5 V/1.2 A and 12 V/0.75 A) 15 W wide range mains developed for general purpose applications.
The core of the application is the VIPer37HE, a new offline high voltage converter from the VIPer® plus family. The IC combines a high-performance low voltage PWM controller chip and an 800 V, avalanche-rugged Power MOSFET in the same package.The main characteristics of the demonstration board are its high efficiency and low standby consumption. Extremely low consumption under no load conditions is ensured thanks to burst mode operation that reduces the average switching frequency and minimizes all frequency related losses.
The VIPer37HE operates at fixed frequency, 115 kHz. Frequency jittering is implemented and it helps to meet the standards regarding electromagnetic disturbance. The several protections present on the device, such as overvoltage, overload, output short-circuit, secondary winding short, hard transformer saturation protection and brownout protection, improve the reliability and safety of the design.
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所有功能
- Universal input mains range: 85 - 265 Vac frequency 50-60 Hz
- Output voltage1: 5 V/1.2 A continuous operation
- Output voltage2: 12 V/0.75 A continuous operation
- Standby mains consumption: < 50 mW at 230 Vac(without brownout)
- Average efficiency: > 70%
- EMI: according to EN55022-Class-B
- RoHS compliant