STEVAL-ISA011V1 STMicroelectronics, STEVAL-ISA011V1 Datasheet - Page 2

• Manufacturer Part Number: STEVAL-ISA011V1
• Description: BOARD EVAL VIPER12A LP AC/DC
• Manufacturer: STMicroelectronics
• Series: VIPER™r
• Type: AC/DC Switching Convertersr

Specifications of STEVAL-ISA011V1

• Design Resources: STEVAL-ISA011V1 Gerber Files STEVAL-ISA011V1 Schematic STEVAL-ISA011V1 Bill of Materials
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 4.1W
• Voltage - Output: 4.5V
• Current - Output: 900mA
• Voltage - Input: 88 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 60kHz
• Board Type: Fully Populated
• Utilized Ic / Part: VIPer12A
• Input Voltage: 88 V to 265 V
• Output Voltage: 4.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: VIPER12ADIP-E
• Kit Application Type: Power Management - Voltage Regulator
• Application Sub Type: AC / DC Adapter
• Kit Contents: Board
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: VIPer12A
• Other names: 497-6413; STEVAL-ISA011V1

Table of Contents
Table of Contents
1
2
Appendix A STEVAL-ISA011V Demo Board Schematic . . . . . . . . . . . . . . . . . . . 30
Appendix B STEVAL-ISA011V1 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . 31
3
2/33
STEVAL-ISA011V1 Board Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
1.3
1.4
STEVAL-ISA011V1 Board Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1
2.2
2.3
2.4
2.5
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Primary Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.1
1.1.2
Secondary Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.1
1.2.2
1.2.3
Completed Transformer Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Feedback Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Start-up Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.1
2.1.2
Temperature Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Dynamic Load Regulation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Steady-State Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.4.1
2.4.2
EMI Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Step 1, Input Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 2, Transformer Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
D
Transformer Turns Ratio and D
C
Full Load Start-up Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
No Load Start-up Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Steady-State Full Load Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Steady-State No Load Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11
11
Current and Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rev. 1
11
Peak Current . . . . . . . . . . . . . . . . . . . 10
AN2272 - Application Note