Si82xx-EVB UG
Rev. 0.1
5
3.1. Si82xx ISOdriver Board Test
Figure 3 illustrates the Si8234 with VDDI powered from 5 V and VDDA and VDDB powered from 15 V. A 10 kHz
signal is applied to the Si8234's PWM input. As shown, the Si8234 transmits a 10 kHz signal to VOA and VOB
(Channel 3 illustrates VOA output, and Channel 2 illustrates VOB output). Note that VOA and VOB are 180° out of
phase, as would be expected of a PWM driver. In this setup, no drive-trane was connected to the outputs (VOA and
VOB) of the Si8234. Nevertheless, the potentiometer, R35, can be adjusted to dynamically change the dead-time
of the Si8234 if desired. Duplicating this setup is an excellent test to become familiar with the evaluation board. To
repeat this test, perform the following steps:
1. Install a shunting jumper to J12 (Position 1, 2).
2. Install a shunting jumper to J14.
3. Install a shunting jumper to J11.
4. Install a shunting jumper to J13.
5. Connect a 5 Vp-p square wave to P7.
6. Connect a 5 V (100 mA) supply to P9.
7. Connect a 15 V (100 mA) supply to P14.
8. Connect a 15 V (100 mA) supply to P15.
9. Connect a scope probe to TP9 to view VOA.
10.Connect a scope probe to TP11 to view VOB.
Figure 3. Si8234 PWM Outputs
Summary of Contents for Si82 Series
Page 4: ...Si82xx EVB UG 4 Rev 0 1 Figure 2 Si82xx Evaluation Board Silkscreen...
Page 7: ...Si82xx EVB UG Rev 0 1 7 Figure 5 Si82xx Evaluation Board Schematic 2 of 4...
Page 8: ...Si82xx EVB UG 8 Rev 0 1 Figure 6 Si82xx Evaluation Board Schematic 3 of 4...
Page 9: ...Si82xx EVB UG Rev 0 1 9 Figure 7 Si82xx Evaluation Board Schematic 4 of 4...
Page 10: ...Si82xx EVB UG 10 Rev 0 1 5 Si82xx Evaluation Board Layout Figure 8 Si82xx Top Layer...
Page 11: ...Si82xx EVB UG Rev 0 1 11 Figure 9 Si82xx Bottom Layer...
Page 15: ...Si82xx EVB UG Rev 0 1 15 NOTES...
