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Features of the PTH/PTV Family of Non-Isolated, Wide-Output Adjust Power Modules

POLA™ Compatibility

Soft-Start Power Up

5 V

C1

680 F

m

C3

330 F

m

GND

GND

1.8 V

5.49 kW

1% 0.05 W

C 2

22 F

m

PTV05020W

Track

GND

Sense

Adjust

GND

V (2 V/div)

I

V (1 V/div)

O

I (2 A/div)

I

t = 5 ms/div

PTV05020W

SLTS232 – JANUARY 2005

The PTH/PTV family of non-isolated, wide-output adjustable power modules from Texas Instruments are

optimized for applications that require a flexible, high-performance module that is small in size. Each of these

products are POLA™ compatible. POLA-compatible products are produced by a number of manufacturers, and

offer customers advanced, non-isolated modules with the same footprint and form factor. POLA parts are also

ensured to be interoperable, thereby providing customers with true second-source availability.

The Auto-Track feature allows the power up of multiple PTH/PTV modules to be directly controlled from the

Track pin. However, in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track

Figure 7. Power-Up Application Circuit

When the Track pin is connected to the input voltage, the Auto-Track function is permanently disengaged. This

allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is

under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate.

Figure 8.

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