Specifications

Table Of Contents

POWER SUPPLY MODES

Power can be supplied to the board in one of two ways:

Switching Power Supply

The board comes supplied with a 500 kHz switching power supply (Linear Technologies LT1372). If it is desired to utilize the

on-board switching supply, the board should be configured as follows:

1. Connect a 5V, 1.5A or greater lab supply to the J5 power connector.

2. Install Jumper 6 and Jumper 4.

3. Remove Jumper 7 and Jumper 5.

4. Set Jumper 1 to the ON position.

External Supply Operation

To disable the on-board switching supply and operate using external supplies:

1. Remove Jumpers 4 and 6;

2. Install Jumpers 5 and 7;

3. Move Jumper 1 to the “OFF” position to disable the switching power supply;

4. Connect +18V, -18V, and +5V to power input connector J5.

Functionality

The switching supply generates +15V and –10V supply “islands”. The same is true for the +15V and –10 V regulators on the

board. Jumpers 4 and 6 connect the switcher supplies to the +15V, -10V power plane. Jumpers 5 and 7 connect the

regulated outputs to the +15V, -10V power plane. Jumper 1 either enables or disables the LT1372 Switcher.