STEVAL-ISA193V2 Data brief 15 W, 5 V - 3 A output CC primary sensing USB adapter based on STCH02 Features Universal AC Main Input voltage range : 90 V to 264 V AC AC Output range: 5 V - 3 A continuous operation Constant voltage (CV) and constant current (CC) operation with CC primary sensing Input power in standby < 10 mW at 230 V AC Average efficiency: > 81.84%, complies with EuCoC rev. 5 Tier 2 and EPS of DOE USA EMI: According to EN55022-Class Small form factor: (44 x 35 x 15 mm) RoHS compliant WEEE compliant Description The STEVAL-ISA193V2 evaluation board implements a 15 W USB adapter with primary sensing CC feature, based on the STCH02 current mode controller designed for offline quasi-resonant flyback converters, capable of providing constant output current (CC) regulation using primary-sensing feedback. The IC embeds a 650 V, non-dissipative, HV startup cell, which, along with the extremely low quiescent current and burst-mode management, helps minimize residual input consumption, thus achieving less than 10 mW under no-load Product summary conditions. 15 W, 5 V - 3 A The adapter is designed to meet the most stringent energy saving recommendations output CC primary (EuCoC rev. 5 Tier 2 and EPS of DOE USA) as well as EN55022-Class-B sensing USB STEVAL-ISA193V2 Conducted noise emissions. adapter based on STCH02 The extremely small form factor and the output USB connector makes this reference Offline PWM quasi design suitable for small USB chargers and adapters for mobile phones, tablets and resonant controller other hand held equipment STCH02 for ultra-low standby power supplies N-channel 800 V, 0.95 Ohm typ., 6 A MDmesh K5 Power STD7N80K5 MOSFET in DPAK package Field effect rectifier FERD20U60DJFD DB3752 - Rev 1 - November 2018 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-ISA193V2 1 Schematic diagram Figure 1. STEVAL-ISA193V2 board schematic TF L1 7508111123 rev. 6A D3 5V-3A 470uH FERD20U60DJF F1 BR AC IN C3 R1 C1 C2 1nF 220k C9 C7 C8 2A 12uF 12uF 1uF 560uF 560uF NTC AC IN R2 220 20 D1 MRA4007T3G GND D2 R3 BAT41ZFILM 3 C12 C4 R9 100pF 22uF 1k IC1 R4 S TCH0 2 100k Q1 STD7N80K5 VDD HV R8 OPTO R10 2.5V + CURRENT SFH610A-2 12k R11 GD CONTROL 130k - 10 ZCD SENSE C10 FB GND R13 R5 82k 10nF 24k C6 33nF R7 R15 IC2 C5 R14 2.2nF 0.47 3.3 TS432 OPTO1 56k R6 R12 30k 43k SFH610A-2 C11 2.2nF Figure 2. Output characteristic at 115 V AC DB3752 - Rev 1 page 2/6