5
Application Circuit Description
The ACNT-H313 is an isolated gate driver that provides 2.5 A output current. The voltage and the high peak output cur-
rent supplied by this optocoupler make it ideally suited for direct driving of IGBT (or Power MOSFET) with ratings up to
1700 V/100 W. It is also designed to drive different sizes of buffer stage, which will make the class of switchers scalable.
ACNT-H313 provides a single isolation solution suitable for both low and high power ratings of motor control and in-
verter applications usually needed in the renewable energy market.
Each of the ACNT-H313 evaluation boards, as shown in Figure 5, accommodates two units of ACNT-H313 ICs. Therefore,
each board is enough to drive the top and bottom arms of the half-bridge inverter. It allows the designer to easily test
the performance of the gate driver in an actual application under real-life operating conditions. Operating the evalua-
tion board requires merely the inclusion of two isolated DC supplies (range 15V~30V) for both arms of inverter switcher,
and provide the necessary PWM drive signals.
Note:
The board shows how the isolation circuitry (at the far left) is easily contained within a small area, while adequate spacing is maintained for good
voltage isolation and easy assembly.
Figure 5. Top and bottom views of ACNT-H313 evaluation board
