Datasheet

4
SUPERIOR PERFORMANCE AT LOWER VOLTAGES
120 V / 240 V Half-Bridge Circuit Topologies
Single-phase switch-mode power supplies and other devices utilizing half-bridge topologies need test and validation at DC
bus voltages up to 340 V
dc
with up to 680 V
p-p
on the input voltage. HVD310xA probes are cost-effective solutions for
probing the wide range of high voltage signals present in these systems. “No Accessory (NOACC)” versions of these probes
permit additional cost savings. Use your existing accessories or purchase just the ones you want.
MOSFET/IGBT Devices
Upper-side Gate Drive Voltage Measurements
Typically from 3 to 20 volts and “floating” at up to the DC
Bus voltage. HVD-A Series probes can provide very good
results, but the HVFO High Voltage Fiber Optic probe
is optimized for the best upper-side gate drive voltage
measurements with 140 dB CMRR, reduced DUT loading,
and better pulse response.
Device Analysis
Conduction loss or Rds(on) measurements require a
voltage probing solution that has high CMRR, fast overdrive
recovery, voltage clamping (so the oscilloscope is not
overdriven), compensation flatness, gain/amplication to
see small signal details, and precise offset generation to
see the switching device’s turn-off performance. For this
type of analysis, the Teledyne LeCroy DA1855A Differential
Amplier is the best solution. It provides 100 MHz
bandwidth, excellent common mode rejection ratio (CMRR)
of 100,000:1 (typical), and overdrive recovery to within
100 mV from a 400 V input signal in less than 100 ns.
•
High precision - 1% accuracy
•
Automatic gain switching for optimum
performance
Input Voltage
(V
rms
or V
ac
)
Input Voltage
(V
pk-pk
)
DC Bus Voltage
(V
dc
)
Output PWM Voltage
(V
pk
)
120 340 170 170
240 680 340 340
DA1855A
Differential Amplier
HVFO103
High Voltage Fiber
Optically-Isolated Probe