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Vo2 =1.8 V

V IN=12 V

ASIC

VCORE

VCCI O

Io2

PTH12010L

1

10

4

5

6

2

3

98

Tra ck

GND

Inhibit

7

Vadj

Sense

+

Vo1= 3.3 V

C2

330 mF

+

C1

330 mF

+

PTH12020W

7

10

4

5

6

2

3

98

Tra ck

GND

Inhibit

1

Up

Dn

Adjust

C3

330 mF

+

TL7702B

VCC

GND

SENSE

REF

CT

RESET

RESET

8

7

2

1

3

5

6

4

C6

0.68 mF

C4

330 mF

+

R3

R4

C 5

0.1 mF

R5

Sense

2 kW

130 W

RESIN

11 kW

100 kW

10 kW

Remote Sense

PTH12020W/L

SLTS208E–MAY 2003–REVISED OCTOBER 2005

Figure 22. Application Circuit Demonstrating Pre-Bias Startup

regulation performance of the module by allowing it to compensate for any IR voltage drop between its output

and the load. An IR drop is caused by the high output current flowing through the small amount of pin and trace

resistance.

standard application). If a sense pin is left open-circuit, an internal low-value resistor (15-Ω or less) connected

between the pin and and the output node, ensures the output remains in regulation.

This should be limited to a maximum of 0.3 V.

Note: The remote sense feature is not designed to compensate for the forward drop of non-linear or

frequency dependent components that may be placed in series with the converter output. Examples include

OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the remote

sense connection they are effectively placed inside the regulation control loop, which can adversely affect the

stability of the regulator.

22