Reference Design

P-3

REV.: 0/2017

www.recom-power.com

R-REF01-HB

Following DC/DC models are suitable for use with this reference design

Component List

Part

Description

IC2

DC/DC isolated converter for high-side gate-driver. Depending on the transistor type, fit the appropriate DC/DC converter

(please refer to pages P-10 to P-12).

IC3

DC/DC isolated converter for low-side gate-driver. Depending on the transistor type, fit the appropriate DC/DC converter

(see table 1).

T1

High-side switching transistor (not supplied). Read important notice below.

T2

Low-side switch transistor (not supplied). Read important notice below.

Note:

The transistors are placed on the edge of the PCB so that they are easy to mount to a heatsink. They can also be mounted

inverted on the bottom side of the PCB. Both TO247-3L and TO247-4L format transistors can be used by using the appropriate

hole set.

CON1

Connector for logic and driver supply. Connect a 15V, 18V, 24V or 36V DC supply here.

CON2

+V bridge voltage: connect a positive voltage up to 1kV in respect to power-GND to this connector.

CON3

-V bridge voltage: power-GND

CON4

Enable: a high signal enables the driver signals. Place the jumper on the connector to enable the signals permanently

CON5

Switching node of the half-bridge

U1

Signal high-side: TTL-compatible input for the high-side transistor

U2

Signal low-side: TTL-compatible input for the low-side transistor

Table 1

Model

Power [W]

Output Voltage [V]

Application

R12P22005D*

2

+20/-5

SiC MOSFETs

R12P21503D*

2

+15/-3

SiC MOSFETs

R12P21509D*

2

+15/-9

IGBTs

R12P1509D

1

+15/-9

IGBTs

R12P06S*

1

+6

GaN

R12P12S

1

+12

Cascode/Si MOSFET

*these models are included in the reference design. Each of them two times

Truth table (with IC1 SI8273 mounted):

Input

Output

Comment

U1

U2

Enable

High-side Gate

Low-side Gate

L

L

H

L

L

L

H

H

L

H

H

L

H

H

L

H

H

H

L

L

Invalid state

X

X

L

L

L

Device is disabled