Philips Semiconductors

PIP401

OR-ing Intelligent Switch

Product data

Rev. 03 — 5 November 2002

9 of 16

9397 750 10578

© Koninklijke Philips Electronics N.V. 2002. All rights reserved.

11. Application information

11.1 Parallel redundant operation

Figure 7 shows a typical parallel redundant power supply system. Two 5 V system

power supplies are connected via PIP401 devices to a shared load. An auxiliary

supply provides the PIP401 devices with 12 V. Power supplies with forced current

sharing capability are ideal for this application. The remote connection to each

PIP401 is taken from a point close to the load in order to compensate for the effects

Fig 5.

On-state characteristic; typical values.

Fig 6.

Normalized on-state voltage drop factor as a

function of junction temperature.

03aj17

0

50

100

150

0

10

203040

IO (A)

∆VON

(mV)

(1)

(2)

(3)

03af18

0

0.5

1

1.5

2

-60

0

60

120

180

Tj (°C)

a

a

∆V

ON

∆V

ON 25

°C

()

------------------------------

=

Fig 7.

PIP401 used in parallel redundant power supply network.

VCC

VRS

GND

LOAD

03ah73

5 V

SUPPLY

12 V

AUXILIARY

SUPPLY

5 V

SUPPLY

cable

inductance

VO

VI

TFL

VCC

VRS

GND

cable

inductance

VO

VI

TFL