IRDC5001-LS48V International Rectifier, IRDC5001-LS48V Datasheet

KIT EVAL ORING DEMO BOARD/IR5001

IRDC5001-LS48V

Manufacturer Part Number
IRDC5001-LS48V
Description
KIT EVAL ORING DEMO BOARD/IR5001
Manufacturer
International Rectifier
Datasheet

Specifications of IRDC5001-LS48V

Main Purpose
Power Management, ORing Controller / Load Share
Embedded
No
Utilized Ic / Part
IR5001
Primary Attributes
Dual -48V Inputs (-36 ~ -75 V) are OR-ed, Up to 200 W Loads
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Secondary Attributes
-
Other names
*IRDC5001-LS48V
Overview
This document describes how to connect and evaluate the supplied IR5001 Active ORing demo board.
The purpose of this circuit is to demonstrate the Active ORing function for carrier-class system boards
(in which two negative 48V inputs (-36V to -75V range) are OR-ed to provide redundant board power),
and to show how the IR5001 can be used to implement Reverse Polarity protection for –48V input DC-
DC converters. The front side of the demo board is shown in Fig. 1.
Active ORing Demo Board Quick Evaluation Procedure
The circuit schematic is shown in Fig. 2. The circuit incorporates two IR5001 Active ORing ICs (SO8
package), and two IRF7495, 22mOhm, 100V, N-Channel active ORing FETs, also in SO8 package. The
power MOSFETs used in this circuit are capable of handling up to 200W of redundant power in 36V to
75V range. For lower power applications, it is recommended to use slightly higher Rds(on) MOSFETs
to enable fastest response time after a reverse current is detected. The IRF7497, 36mOhm, 100V, N-
Channel active ORing FET is ideal for 60W applications. As a general design practice, the active ORing
FET should be selected to drop approx 50mV during conduction. Eight 3.3uF, 80V aluminum capacitors
are connected on the redundant bus.
Input A+
Input B+
Input A-
Input B-
IR5001 Active ORing Demo Board Evaluation Procedure
International Rectifier • 233 Kansas Street, El Segundo, CA 90245 USA
IRF7495 Active ORing
MOSFETs
Figure 1. IRDC5001-LS48V Demo Board
IR5001 Active ORing
IRF7495
IRF7495
International Rectifier
Controllers
FET Check LEDs
FET Check
IRDC5001-LS48V
Switch
1/8 and 1/4 Brick
BUS converter /
connections
BUS Caps
Output+
Output-

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IRDC5001-LS48V Summary of contents

Page 1

... Input B- IRF7495 Active ORing MOSFETs Figure 1. IRDC5001-LS48V Demo Board Active ORing Demo Board Quick Evaluation Procedure The circuit schematic is shown in Fig. 2. The circuit incorporates two IR5001 Active ORing ICs (SO8 package), and two IRF7495, 22mOhm, 100V, N-Channel active ORing FETs, also in SO8 package. The power MOSFETs used in this circuit are capable of handling up to 200W of redundant power in 36V to 75V range ...

Page 2

... A M2 48V - B Figure 2. IR5001 Active ORing Demo Board Schematic The procedure for checking the response time of the IR5001 to a simulated short circuit failure of one power source is shown in Fig. 3. The power supply B is set at about 1V higher output voltage than IRDC5001-LS48V Load + Load - ...

Page 3

... Another waveform shown in Fig the redundant bus voltage (green trace). With 48V being delivered to a 150W bus converter load, with source B shorted, only 3V bus voltage disturbance is observed. VB Short circuit Current Figure 3. IR Active ORing function tests IRDC5001-LS48V = 49V, and V = 48V. This guarantees that power supply IR2085S ...

Page 4

... FETs based on various possible status of sources A and B. Note that this table can determine not only if a FET is short, but also open. For additional information on how to use FET Check feature, please contact your local IR Field Applications Engineer IRDC5001-LS48V 4A reverse current 3V bus voltage disturbance 2: MOSFET Vgs, 3: MOSFET Vds ...

Page 5

... off off IRDC5001-LS48V During the check Fet A Vsd of fet A > 300mV good Vsd of fet B < 300mV Vsd of fet A > 300mV good Vsd of fet B > 300mV Short Vsd of fet A < 300mV Vsd of fet B < 300mV Vsd of fet A > 300mV Open or Vsd of fet B > 300mV ...

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