Acpl-736J Sigma-Delta Current Sensing Module - Broadcom ACPL-355JC Reference Manual

ACPL-355JC Reference Manual 62-mm SiC Module EB1200M62-355JC Evaluation Board
Figure 24: Connector J3

3.4.5 ACPL-736J Sigma-Delta Current Sensing Module

The ACPL-736J sigma-delta current sensing module is a separate board that is not integrated onto the EB1200M62-355JC
evaluation board. The current sensing module's H1 connector is connected to the EB1200M62-355JC's J4 connector using
a 5-pole FPC cable. The shunt resistor is connected to the current sensing board via S1 and S2 terminals with M3 screws.
The current from the 62-mm module OUT terminal is then measured using the 0.05-mΩ shunt resistor (KOA HS-50U-2) as
shown in Figure 25. Depending on the module's ratings, the output current will range from 250A to 500A. This will give a
sense voltage of 12.5 mV to 25 mV, which is within the ±50-mV linear range of the ACPL-736J.
Figure 25: Current Sensing Module – EB1200M62-355JC and 62-mm Connection
The current sensing module's H1 connector is connected to the EB1200-339J's J1 connector using a 5-pole FPC cable. The
EB1200-339J provides 5 VCC and VDD2 to power up the board and the ACPL-736J respectively. The U2 (pSemi PE33100)
transformer driver will switch transformer T1 (Wurth 750344162) to provide isolated supply to VDD1 of the ACPL-736J. U3
provides a 20-MHz external CLK to ACPL-736J, and the CLK frequency can be adjusted by changing the value of resistor
R4.
Broadcom ACPL-355JC-62mmSiC-RM100
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