EPC EPC90147 Snelstarthandleiding - Pagina 6
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MEASUREMENT CONSIDERATIONS
Measurement connections are shown in figure 8.
When measuring the switch node voltage containing
high-frequency content, care must be taken to
provide an accurate high-speed measurement.
An optional two pin header (J33) is provided for
switch-node measurement.
Differential probe is recommended for measuring the
high-side bootstrap voltage (J1). IsoVu probes from
Tektronix has mating MMCX connector.
For regular passive voltage probes (e.g. TPP1000)
measuring switch node using MMCX connector,
probe adaptor is available. PN: 206-0663-xx
NOTE. For information about measurement techniques,
the EPC website offers:
"AN023 Accurately Measuring
High Speed GaN
Transistors" and the How to GaN
educational video series, including:
EPC – POWER CONVERSION TECHNOLOGY LEADER |
HIGH VOLTAGE
Bootstrap
voltage MMCX
(HIGH VOLTAGE!)
HIGH VOLTAGE
Voltage measurement:
Input voltage for Boost,
Output voltage for Buck
(HIGH VOLTAGE!)
HTG09- Measurement
EPC-CO.COM
| ©2022 |
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V
V
+
(a)
(b)
Figure 8: Measurement points (a) front side, (b) Back side
EPC90147
Voltage measurement:
Input voltage for Buck,
Output voltage for Boost
(HIGH VOLTAGE!)
HIGH VOLTAGE
Switch-node
oscilloscope probe
Ground oscilloscope probe
Switch-node
oscilloscope probe
Ground oscilloscope probe
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