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UM0920

Board connections

Doc ID 17220 Rev 2

5/14

2 Board

connections

The STEVAL-ISA071V2 demonstration board is pictured in

Figure 2

below, with input and

output locations.

Figure 2.

Input/output connection of SMPS

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Summary of Contents for UM0920

Page 1: ...l The basic concepts used in this design can also be applied for higher power outputs or different voltage ranges The SMPS generates outputs of 5 V and 12 V referred to the output marked 5 V The 5 V is dedicated to supplying an MCU This configuration allows the use of the MCU to directly drive a Triac referred to neutral The 12 V output is used to supply additional circuits relays OA etc This docu...

Page 2: ...ics 4 2 Board connections 5 3 Board details 6 3 1 Schematic diagram 6 3 2 Description of main components 7 3 3 Transformer 8 3 4 PCB details and layout 8 3 5 Bill of materials 10 4 Measurements 11 5 Revision history 13 Downloaded from Arrow com Downloaded from Arrow com ...

Page 3: ...gure 4 PCB layout top layer bottom SMD layer and bottom copper layer 9 Figure 5 Efficiency at 120 VAC and 230 VAC 11 Figure 6 Load characteristics of 12 V output at 120 VAC and 230 VAC 11 Figure 7 EMI measurement for EN55022 Class B AVG detector 12 Figure 8 EMI measurement for EN55022 Class B peak detector 12 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 4: ...Max output power 4 W range is up to 6 W for EU Standby power 35 mW at 230 VAC Short circuit protected PCB data Single sided 35 µm FR4 33 x 45 mm effective size of SMPS circuitry Isolation non isolated N connected to output GND EMI compliant with EN55022 Class B Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 5: ...he STEVAL ISA071V2 demonstration board is pictured in Figure 2 below with input and output locations Figure 2 Input output connection of SMPS Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 6: ... of the non isolated flyback converter board prototype based on the VIPer16 is provided in Figure 3 below Figure 3 STEVAL ISA071V2 circuit schematic Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 7: ...tory but it connects the output voltage to VCC of the Viper16 reducing standby consumption Peak clamp D5 R2 R7 C2 This circuit absorbs energy from the voltage spike present after MOSFET turn off This spike is generated by leakage inductance of the transformer Secondary side D2 D4 C1 C7 This consists of two rectifiers and capacitors for each output The 5 V output is used for feedback regulation The...

Page 8: ...ded FR4 with a 35 µm thickness The total size of the PCB is 41 x 58 mm and the PCB space occupied by electronic circuitry is 33 x 45 mm The layout of the PCB is provided in Figure 4 Table 1 Transformer windings Layer Start pin Stop pin Number of turns Wire number Wire diameter Wire material Inductance Position 1 1 2 157 1 0 2 Cu2l 2450 µH Primary 2 8 4 16 1 0 3 Cu2 26 µH Out 7 V 3 4 7 13 1 0 3 Cu2...

Page 9: ... bottom SMD layer and bottom copper layer Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 10: ...50 V 0805 11 1 C10 10 µF 35 V 105 C 12 1 L1 2 2 mH 80 mA 13 1 T1 EF16 T5684 51 01 EPCOS 14 1 D1 TMMBAT41 SOD80 15 1 D2 STPS1H100 SMA STMicroelectronics 16 2 D3 D6 SMD 1N4007 MELF SMA 17 1 D4 STPS1L60 SMA STMicroelectronics 18 1 D5 STTH1L06 SMA STMicroelectronics 19 1 U1 VIPER16 DIP 7 STMicroelectronics 20 1 J1 Screw terminal 2 pos RM 5 mm 21 1 J2 Screw terminal 3 pos RM 5 mm Downloaded from Arrow ...

Page 11: ...00 10 00 20 00 30 00 40 00 50 00 60 00 70 00 80 00 90 00 0 00 0 50 1 00 1 50 2 00 2 50 3 00 3 50 4 00 POUT W Standby at 230 VAC 35 mW 10 11 12 13 14 15 16 0 20 40 60 80 100 120 140 160 180 IOUT mA V OUT V 5 V 50 mA AM00899 10 11 12 13 14 15 16 0 20 40 60 80 100 120 140 160 180 IOUT mA V OUT V 5 V 50 mA 5 V 100 mA 5 V 200 mA 5 V 400 mA 5 V 100 mA 5 V 200 mA 5 V 400 mA 120 VAC 230 VAC Downloaded fro...

Page 12: ...022 Class B peak detector Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 13: ...ed Figure 1 to Figure 4 and Disclaimer minor text corrections throughout document Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downlo...

Page 14: ...ROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AU...

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