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12V-4W, 115kHz isolated flyback based on VIPer06

STEVAL-ISA134V1

Overview

The STEVAL-ISA134V1 demonstration board is a a 12 V - 4 W power supply in isolated flyback topology using the VIPer06, a new off-line high voltage converter by STMicroelectronics.

The VIPer06 features an 800 V avalanche rugged power section, PWM operation at 115 kHz with frequency jittering for lower EMI, cycle-by-cycle current limit with adjustable set point, on-board soft-start and safe auto-restart after a fault condition.
Protection features available include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection (the latter available only if auxiliary winding is used).
This flyback converter design is suitable for various applications, such as external adapter or as an auxiliary power supply in consumer equipment.

Main features

AC main input voltage V_IN: 85 V_AC- 265 V_AC
Main frequency f_L: 50 Hz; 60 Hz
Output voltage V_OUT: 12 V
Max output current I_OUT: 333 mA
Precision of output regulation ΔV_{OUT_LF}: ± 5%
High frequency output voltage ripple: ΔV_{OUT_HF}50 mV
Min active mode efficiency ηAV = 71%
Max ambient operating temperature: T_AMB= 60 °C

Design Files

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Update:2025-05-10 04:56:05

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