Avago Technologies ACNT-H313-000E User Manual
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Testing both arms of a half-bridge inverter driver (without a switcher)
1. To simulate the actual gate capacitance of the switcher, solder 10 nF capacitors across Gate and Emitter terminals of
Q1.
2. Connect DC supplies (DC Supplies 1 and 2 with voltage range 15V~30V) across V
CC2
(pin-8) and V
EE
(pin-5) terminals
of IC1, respectively. For testing, this can be non-isolated.
3. Connect drive signals:
a) A 10 kHz 5 V DC pulse (at slightly < 50% duty) from a dual-output signal generator across the IN1+ and IN1- pins of
CON1a to simulate microcontroller output to drive the lower arm of the half-bridge inverter.
b) Another 10 kHz 5 V DC pulse (at 180
° out of phase to 3a) from the dual-output signal generator across IN2+ and IN2-
pins of CON1b to simulate microcontroller output to drive the upper arm of the half-bridge inverter.
4. Use a multi-channel digital oscilloscope to capture the waveforms at the following points:
a. LED signal at IN1+ pin with reference to (w.r.t.) IN1-
b. LED signal at IN2+ pin w.r.t. IN2-
c. V
ga
representing the output voltage of ACNT-H313 (IC1a) at Gate pin of Q1a w.r.t. V
Ea
d. V
gb
(through an isolated probe) representing the output voltage of ACNT-H313 (IC1b) at Gate pin of Q1b w.r.t. V
Eb
Figure 2. Simple simulation test setup of evaluation board