Broadcom ACPL-355JC Reference Manual page 16

ACPL-355JC Reference Manual
Figure 8: Isolated SMPS for the Gate Driver Output Stage
Figure 8 shows the isolated SMPS circuitry. The SMPS is based on the IR2085 self-oscillating half-bridge gate driver and
two transformers with a 1:2 ratio.
and FF6MR12KM1 MOSFET modules. Based on the values shown in table, it is recommended to use the resistor and Zener
diode values that were used in the circuit with the FF6MR12KM1 and WAB300M12BM3 modules, due to small voltage drops
related to switching.
Table 9: Power Supply Configurations
Device
WAB300M12BM3
FF6MR12KM1
An isolated 5V/5V voltage regulator R1SX-0505-R provides isolated 5V for ACPL-C87B IC, as shown in
The EB1200M62-355JC can be connected to a current sensing module through the FPC 5-pin J4 connector. The J4
connector is provided for the external output current measurement board, which is based on Broadcom's isolated sigma-
delta modulator ACPL-736J, but different current measurement boards with an equivalent pinout can be used. Because the
low-voltage side of the ACPL-736J supports a power supply of either 5V or 3.3V, the EB1200M62-355JC enables voltage
level selection via jumper J3. For this purpose, the EB1200M62-355JC features the high-performance LDO 5V/3.3V, shown
in Figure 10, which enables alternative powering of the ACPL-736J current sensing module with 3.3V.
Broadcom
Table 9 shows the recommended power supply configurations for the WAB300M12BM3
+V_Q –V_Q
+14V –4V
+15V –5V
62-mm SiC Module EB1200M62-355JC Evaluation Board
R49 D20 and D25
820R 16V Zener diode
953R 16V Zener diode
Figure 9.
ACPL-355JC-62mmSiC-RM100
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