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SI8275ISO-KIT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
2.4 Oscilloscope Setup
To set up the oscilloscope, perform the following steps:
1. Turn ON the oscilloscope.
2.
Set the scope to Trigger on CH1 and adjust the trigger level to approximately 2 V.
3. Set CH1 to 2 V per division and CH2 to 5 V per division.
4. Adjust the seconds/division setting to 500 ns/division.
5. Connect the scope channel 1 probe to VIA/PWM. Ground the probe to GNDI.
6. Connect Channel 2 probe to VOA (J2 pin2 or TP15). Ground the probe to VSSA.
7. Adjust the vertical position of each channel to properly view each channel as shown in the figure below.
A 500 kHz square wave should display on Channel 1 of the scope for the input and a 15 V version should display on Channel 2, as
shown in the following figure.
Figure 2.1. 500 kHz Square Wave
UG186: Si827x-EVB User's Guide
Si827x ISOdriver Board Setup and Demo Test
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 3
2.5 Repeat for Second Channel
1. Disable the function generator output.
2.
Turn OFF the 15 V supply.
3. Disconnect 15 V supply from VDDA/VSSA.
4. Connect the 15 V supply to VDDB and VSSB (J3 pins 3 and 1 or TP17 and TP18).
5. Move the channel 2 scope probe to VOB/VSSB (J3 pin 2/1 or TP19/TP18).
6. Move the function generator to VIB (JP2 pin 2 or TP6). NOTE: If this board is populated with the Si8274 device, leave the function
generator connected to VIA/PWM. Otherwise, move the shunt from JP2 to JP1.
7. Turn ON the dc supply.
8. Ensure that the current draw is less than 100 mA. If it is larger, this indicates that either the board or Si827x has been damaged or
the supply is connected backwards.
9. Enable the function generator output.
10. The scope display should show both the input and output waveforms as before. NOTE: If this board is populated with the Si8274
device, the output waveform will be inverted with respect to the input.
2.6 Test the Si8271
1. Disable the function generator output.
2. Turn OFF the 15 V supply.
3. Turn OFF the 5 V supply.
4. Disconnect 15 V supply from VDDA/VSSA.
5. Connect the 15 V supply to VDD and VSS (J5 pins 2 and 1 or TP22 and TP28).
6. Connect the 5 V supply to VDDI2 and GNDI2 (J4 pins 1 and 2 or TP20 and TP21).
7. Short the VOUTPUT+ and VOUTPUT- pins together (J6 pins 1 and 2) and connect them to the channel 2 scope probe.
8. Ground the probe at VSS (J5 pin 1 or TP28).
9. Move the function generator to VI (JP4 pin 2 or TP23).
10. Move the channel 1 scope probe to be connected to the same points as the function generator.
11. Make sure jumper JP5 has a shunt between pins 1 and 2 to enable the device.
12. Turn ON the dc supplies.
13. Ensure that the current draw is less than 100 mA on the 15 V supply and 25 mA on the 5 V supply. If either is larger, this indicates
that either the board or Si827x has been damaged or the supply is connected backwards.
14. Enable the function generator output.
15. The scope display should show both the input and output waveforms as before.
UG186: Si827x-EVB User's Guide
Si827x ISOdriver Board Setup and Demo Test
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 4
3. Si827x-EVB Power and Jumper Connection Descriptions
The power and jumper connections are summarized here:
•
J1 Screw terminal block used to connect external power supply for input side of Si827x.
• J2 Screw terminal block used to connect external power supply for output side A as well as bring out output A of Si827x.
• J3 Screw terminal block used to connect external power supply for output side B as well as bring out output B of Si827x.
• J4 Screw terminal block used to connect external power supply for input side of Si8271.
• J5 Screw terminal block used to connect external power supply for output side of Si8271.
• J6 Screw terminal block used to bring out V+ and V– outputs of Si8271.
• JP1 Header to facilitate connection of external signal for VIA/PWM of Si827x.
• JP2 Header to facilitate connection of external signal for VIB of Si827x (not populated for Si8274 version of EVB).
• JP3 Header to facilitate connection of external signal for ENABLE of Si827x.
• JP4 Header to facilitate connection of external signal for VI Si8271.
• JP5 Header to facilitate connection of external signal for ENABLE of Si8271.
• JP6 Header to facilitate evaluation of BOOTSTRAP circuitry.
UG186: Si827x-EVB User's Guide
Si827x-EVB Power and Jumper Connection Descriptions
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 5
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

SI8275ISO-KIT

Mfr. #:
Buy SI8275ISO-KIT
Manufacturer:
Silicon Labs
Description:
Power Management IC Development Tools SI8275/71 EVAL KIT
Lifecycle:
New from this manufacturer.
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