Fujitsu MB 86276 Handbuch - Seite 10

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Prepared

Manfred Ortmann

Approved

2.2.1 Power Supply

Connect the MB 91F467 / MB 86276 Evaluation board with a power supply between 5 and 34 V

DC and approximate 10 Watt at connector X100.

Be aware to use the correct polarity as shown in picture 2-5.

A protection against wrong polarity ( D109 ) and overcurrent ( F100 ) is implemented but a too

high current can damage the power supply or can produce great heat !

The step-down switching regulator LT3481 from Linear Technology ( U101 ) regulates from the

input voltage the +5 V on the board.

The required voltages + 3.3 V and + 1.8 V will be regulated from the dual switching power

regulator LT1940EFE-PBF from Linear Technologies ( U100 ) from the +5 V on the board.

Preliminary

Document Number

Checked

Date

2008-05-23

Picture 2-4: Power supply connector

Pic. 2-5: Polarity of the power supply connector

Revision

Storage

PA 6.2

Mycable01

10(30)