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PIN DESCRIPTIONS

Sense(+)

Adjust

Sense(−)

PTQA430xxxN

(Top View)

On/Off

1

2

3

5

6

7

4

8

PTQA430025, PTQA430033, PTQA420050

SLTS261A – MAY 2006 – REVISED DECEMBER 2006

central office supply, this input is connected to the primary system ground.

powering the module from a +48-V supply, this input is connected to the 48-V return.

or left open-circuit. For units identified with the NEN option, applying a logic low to this pin will enable the output.

And for units identified with the PEN option, the output will be disabled.

calculations for the resistance value follows industry standard formulas. For further information consult the

application note on output voltage adustment.

output is normally connected to the secondary circuit common when a positive output voltage is desired.

Sense(+): Provides the converter with an output sense capability to regulate the set-point voltage directly at the

load. When used with Sense(-), the regulation circuitry will compensate for voltage drop between the converter

Sense(–): Provides the converter with an output sense capability when used in conjunction with Sense(+) input.

6

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