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General Purpose Power Supply (GPDPS) 6 Device PowerSupply

System Reference, January 2001

159

If the load capacitor is too high the DPS channel switches

into current clamp mode. The current clamp mode limits

the maximum DPS current. As can be seen, this behavior

results in a significantly increased voltage rise time.

Ganging GPDPS Channels

In order to achieve a higher output current, you can

operate multiple GPDPS channels in parallel, known as

the Ganged Mode. This mode is useful e.g. for large CPUs

and modules.

Ganging is defined as combining multiple GPDPS chan-

nels for the purpose of providing a current higher than

that obtainable from a single GPDPS channel.

Consider n DPS channels ganged together. The result will

be the current and voltage shown below.

Max. current: up to 8 A per General Purpose DPS channel,

up to 16 A per General Purpose DPS board.

NOTE It is not possible to operate DPS channels in series to

provide a higher output voltage.

How to Gang Supplies

As mentioned on page 138, you can gang up to 16 (for the

448 pin testhead) or 32 (for the 960 pin testhead) General

Purpose DPS channels in 4 groups (each group consisting

of a master channel and slaves where necessary).

Note that although each master can support up to 15

slaves, the allocation of masters and slaves must be made

such, that the total number of 16 or 32 channels is not

exceeded.

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AWG G3 PAD FOR PS3 Spezifikationen Seite 159