SI85XX-EVB

Si85xx Ta rget Board User ’s Guide Si85 X X U NIDIRECTIONAL AC C URRENT S ENSOR TARGET B OARD U SER ’ S G UIDE 1. Introduction The Si85xx products are unidirectional ac current sensors available with full-scale current sense input ranges of 5, 10, and 20 Amps. Si85xx products are ideal upgrades for older current sensing technologies offering size, performance, and cost advantages over current transformers, Hall Effect devices, DCR circuits, and other approaches. The Si85xx are extremely low loss, adding less than 1.3 m of series resistance and less than 2 nH series inductance in the sensing path at 25 °C. Current-sensing terminals are isolated from the other package pins, providing 1000 VRMS of isolation with the 4x4x1 mm QFN package and 5000 VRMS of isolation with the wide-body, 20-pin SOIC package. 2. Kit Contents The Si85xx Unidirectional AC Current Sensor Development Kit contains one of two versions of the 10 Amp, Si8512-based evaluation board or one version of the 20 Amp Si8513 based evaluation board. See "8. Ordering Guide" on page 10 for part number details for the 1 kV (QFN) or 5 kV (SOIC). 3. Hardware Overview The Si85xx Target Boards shown in Figures 1, 2, and 3 provide a means of evaluating the ac current sensor in an existing application. The boards are meant to be soldered directly into a user’s existing power supply and come with either the Si8512 installed (10 Amp full-scale input range) or with the Si8513 installed (20 Amp full-scale input range). For more information, refer to the Si85xx data sheet. Figure 1. Si85xx-TB Overview (1 kV, 10 Amp Target Board) Figure 2. Si85xx5kV-TB Overview (5 kV, 10 Amp Target Board) Figure 3. Si85xx20AQFN-TB Overview (1 kV, 20 Amp Target Board) Rev. 0.4 8/10 Copyright © 2010 by Silicon Laboratories Si85xx Target Board User’s Guide Si85xx Ta rget Board User ’s Guide 4. Target Board Hardwired to Single-Phase POL Figure 4 illustrates the Si85xx-TB (1 kV, 10 Amp target board) soldered directly into a single-phase POL. The single-phase POL is designed to operate at a 400 kHz switch rate and provides better than 90 percent efficiency. It also provides 10 amps of peak current to the load and protects the supply by shutting down in the event of an overcurrent condition. Figure 4. Si85xx-EVB Hardwired to Single-Phase POL (1 kV Target Board) Figure 5 shows the Si8512 accurately monitoring the POL's switching current. As shown in the scope plot, a 1.6 V peak output voltage accurately monitors the 8 Amp peak, 50 percent duty cycle, 400 kHz current signal of the POL. A 20 m sense resistor in series with the Si85xx is also monitored via a differential probe to provide a baseline measurement of the POL. Si8512 20 m Sense Resistor Figure 5. Si85xx-TB OUT1 Oscilloscope Plot To accommodate this test, the Si85xx-TB was powered with a 5 V (100 mA) supply connected from J1 to J2. R1 was soldered from J4 to the respective phase control line of the POL. R2 and R4 were jumped to GND on J4. R3 was tied to 5 V, and the Mode pin was jumped to VDD via J7. 2 Rev. 0.4 Si85xx Ta rget Board User ’s Guide 5. Si85xx Evaluation Board The boards come with either the Si8512 installed (10 Amp full-scale input range) or with the Si8513 installed (20 Amp full-scale input range). Refer to Figures 6, 7, and 8 for the locations of the various I/O connectors and major components. Note that 100  resistors were added in series to the R1 to R4 control lines on the 5 kV, 10 Amp target board and to the 20 Amp QFN target board to reduce inductive ringing from excessively long wires; these are optional for the end-system design.        J1 J2 J3 J4 J5 J6 J7 5 V Supply Input power connection 5 V, 100 mA GND, Input Supply power return connection, 0 V HDR-2X2, Mode Control input HDR-2X7, R1, R2, R3, R4 inputs, OUT1, OUT2 outputs, and seven GND return pins IIN Positive Current Sense Input IOUT Negative/return Current Sense Input HEADER, TRST timing select jumper, default tied to VDD Figure 6. Final Setup (1 kV, 10 Amp Target Board) Figure 7. Final Setup (5 kV, 10 Amp Target Board) Figure 8. Final Setup (1 kV, 20 Amp Target Board) Rev. 0.4 3 Si85xx Ta rget Board User ’s Guide 5.1. VIN (J1, J2) The user-provided power supply should be connected to connectors J1 and J2, where J2 is the reference. The power source must provide up to 5 V with at least 100 mA output current. Table 1. J1, J2 Pin Descriptions Jumper # Description J1 5 V, 100 mA J2 GND 5.2. Mode Pin (J3) Connector J3 is the Mode Control header. The user should tie this pin to either VDD or GND depending on the power supply topology being tested. Table 2. J3 Pin Descriptions Jumper # Description J3 VDD or GND 5.3. R1, R2, R3, R4 Inputs, OUT1, OUT2 Outputs (J4) Connector J4 is used to provide the control inputs (R1, R2, R3, R4, MODE) to the Si85xx. It also provides the output voltage of the sensed input current on OUT1 and OUT2. Table 3. J4 Pin Descriptions Jumper # Description J4 R1, R2, R3, R4, OUT1, OUT2, GND 5.4. IIN (J5) Connector J5 is used to provide the positive current sense input to the Si85xx device. Table 4. J5 Pin Descriptions Jumper # Description J5 IIN 5.5. IOUT (J6) Connector J6 is used to provide the negative/return current sense input to the Si85xx device. Table 5. J6 Pin Descriptions Jumper # Description J6 IOUT 5.6. TRST RESET (J7) Connector J7 is used to set the timing for the Si85xx integrator. J7 defaults to Reset option 1 where TRST is tied VDD providing approximately 200 ns of reset time. Reset option 2 is selected by connecting a timing resistor (R1 in Figures 9 and 10 and R7 in Figure 11) from the TRST input to ground. Table 6. J7 Pin Descriptions 4 Jumper # Description J7 TRST—VDD or R1 to GND Rev. 0.4 Rev. 0.4 V5V J1 5V GND J2 2 4 6 8 10 12 14 HDR-2X07 J4 2 4 MODE R1 R2 R3 R4 OUT1 OUT2 V5V 6 5 4 3 2 1 J7 Si851x OUT2 OUT1 R4 R3 R2 R1 U1 R1 DNP IOUT IIN 9 10 C1 10uF V5V J6 IIOUT J5 IIN C2 0.1uF Figure 9. Si85xx-TB Target Board Schematic (1 kV, 10 Amp Target Board) 1 3 5 7 9 11 13 1 3 11 VDD 12 MODE TRST 7 GND 8 J3 2 1 V5V Normal Setup, No Mods Si85xx Ta rget Board User ’s Guide 6. Schematics 5 6 9''9 9''9               Rev. 0.4        02'( 5 5 5 5 287 287 9''9 & X) 9''9 - -803(5 & X) & X)  5 5 '13   5 5  5           6L&*6 *1' 7567 287 287 5 5 5 5 02'( 9'' 8 ,287 ,287 ,287 ,287 ,287 ,,1 ,,1 ,,1 ,,1 ,,1           Figure 10. Si85xx5kV-TB Target Board Schematic (5 kV, 10 Amp Target Board) +($'(5[ - +($'(5[   - - 7XUUHW - 7XUUHW - 7XUUHW Normal Setup, No Mods   - 7XUUHW Si85xx Ta rget Board User ’s Guide                - +'5; +'5;     - 287 287 5 5 5 5 02'( 73 73 73 73 73 73  5  5  5  5  5  5 9 - 8 287  5 12323  ,,1 ,287 6L&,0 287 5 5 5 5 6-           & —) ;5 9 & —) ;5 - 7855(7 - 7855(7 & —) ;5 Figure 11. Si85xx20AQFN-TB Target Board Schematic (1 kV, 20 Amp Target Board) 6- 9 - *1' 9'' - 9 02'( 7567)$8/7 Rev. 0.4 *1' 9 Si85xx Ta rget Board User ’s Guide 7 Si85xx Ta rget Board User ’s Guide 7. Bill of Materials Table 7. Si85xx-TB Bill of Materials (1 kV, 10 Amp Target Board) Item Qty Reference Description Mfr Part Number Manufacturer 1 1 C1 10 uF PCC2182CT-ND Digi-Key 2 1 C2 0.1 uF PCC1812CT-ND Digi-Key 3 1 J1 5V 2551-2-00-44-00-00-07-0 Bisco 4 1 J2 GND 2551-2-00-44-00-00-07-0 Bisco 5 1 J3 HDR-2X2 S2012-02-ND Digi-Key 6 1 J4 HDR-2X07 S2012-07-ND Digi-Key 7 1 J5 IIN 2551-2-00-44-00-00-07-0 Bisco 8 1 J6 IIOUT 2551-2-00-44-00-00-07-0 Bisco 9 1 J7 HEADER S1012-02-ND Digi-Key 10 1 R1 DNP P150CCT-ND Digi-Key 11 1 U1 Si851x Si8500-IS Digi-Key Table 8. Si85xx5kV-TB Bill of Materials (5 kV, 10 Amp Target Board) 8 Item Qty Reference Description Mfr Part Number Manufacturer 1 1 C1 10 µF C0805X5R6R3-106M Venkel 2 1 C2 1 µF C0805X7R160-105M Venkel 3 1 C3 0.1 µF C0805X7R160-104K Venkel 4 4 J1, J2, J5, J6 Turret 2551-2-00-44-00-00-07-0 Mill-Max 5 1 J3 HEADER 2x2 TSW-102-07-T-D Samtec 6 1 J4 HEADER 7x2 TSW-107-07-T-D Samtec 7 1 J7 JUMPER TSW-102-07-T-S Samtec 8 1 R1 DNP CR0805-8W-1002F Venkel 9 4 R2, R3, R4, R5 100 CR0805-10W-1000F Venkel 10 1 U1 Si8512-C-GS Si8512-C-GS SiLabs Rev. 0.4 Si85xx Ta rget Board User ’s Guide Table 9. Si85xx20AQFN-TB Bill of Materials (1 kV, 20 Amp Target Board) Item Qty Reference Description Mfr Part Number Manufacturer 1 4 J1-2 J5-6 Turret 2551-200440000070-ND Digikey 2 1 C3 0.1 µF 399-1167-1-ND Digikey 3 1 C2 1 µF 445-1604-1-ND Digikey 4 1 C1 10 µF C0805C106M9PACTU-ND Digikey 5 1 J7 Stake header S1011E-02-ND Digikey 6 1 J3 Stake header S2011E-02-ND Digikey 7 1 J4 Stake header S2011E-07-ND Digikey 8 2 SJ1-2 Shorting jumper S9000-ND Digikey 9 6 R1-6 100  RNCF20T9100FR-ND Digikey 10 1 R7 No POP No POP Digikey 11 1 U1 Si8513 Si8513-C-IM Silicon Labs 12 6 TP1-6 No POP No POP Digikey Rev. 0.4 9 Si85xx Ta rget Board User ’s Guide 8. Ordering Guide Table 10. Ordering Guide 10 Ordering Part # Description/Contents Isolation Rating Si85xx-EVB Evaluation board with Si8512 (10 Amp) in QFN package 1 kVRMS Si85xx5kV-EVB Evaluation board with Si8512 (10 Amp) in SOIC package 5 kVRMS Si85XX20AQFN-EVB Evaluation board with Si8513 (20 Amp) in QFN package 1 kVRMS Rev. 0.4 Si85xx Ta rget Board User ’s Guide DOCUMENT CHANGE LIST Revision 0.1 to Revision 0.2  Added Si85xx5kV-TB target board descriptive details throughout. Added Figure 2 on page 1. Figure 7 on page 3. Updated Figure 9 title. Added Figure 10 on page 6. Updated Table 7, “Si85xx-TB Bill of Materials (1 kV, 10 Amp Target Board),” on page 8. Added Table 8, “Si85xx5kV-TB Bill of Materials (5 kV, 10 Amp Target Board),” on page 8. Added "8. Ordering Guide" on page 10. Added Revision 0.2 to Revision 0.3  Added Si85xx20AQFN-TB target board descriptive details throughout. Added Figure 3 on page 1. Figure 8 on page 3. Added Figure 10 on page 6. Added Table 9, “Si85xx20AQFN-TB Bill of Materials (1 kV, 20 Amp Target Board),” on page 9. Updated "8. Ordering Guide" on page 10. Added Revision 0.3 to Revision 0.4  Updated "8. Ordering Guide" on page 10. Rev. 0.4 11 Si85xx Ta rget Board User ’s Guide CONTACT INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. 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