Application Notes

For technical support and further information visit http://power.ti.com

PTH/PTV Series of Wide-Output Adjust

Power Modules (3.3/5-V Input)

Features of the PTH Family of Non-Isolated

Wide Output Adjust Power Modules

POLA™

Compatibility

The PTH/PTV family of non-isolated, wide-output adjust

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 cus-

tomers advanced, non-isolated modules with the same

footprint and form factor. POLA parts are also asssured

to be interoperable, thereby providing customers with true

second- source availability.

From the basic, “Just Plug it In” functionality of the 6-A

modules, to the 30-A rated feature-rich PTHxx030, these

products were designed to be very flexible, yet simple to

use. The features vary with each product. Table 3-1 pro-

vides a quick reference to the features by product series

and input bus voltage.

Table 3-1; Operating Features by Series and Input Bus Voltage

For simple point-of-use applications, the PTHxx050

provides operating features such as an on/off inhibit,

output voltage trim, pre-bias startup, and over-current

protection. The PTHxx060 (10 A), and PTHxx010 (15/12 A)

include an output voltage sense, and margin up/down

controls. Then the higher output current, PTHxx020

and PTHxx030 products incorporate over-temperature

shutdown protection.

The PTVxx010 and PTVxx020 are similar parts offered

in a vertical, single in-line pin (SIP) profile, at slightly

lower current ratings.

All of the products referenced in Table 3-1 include Auto-

Track™. This feature was specifically designed to simplify

the task of sequencing the supply voltages in a power

system. This and other features are described in the fol-

lowing sections.

Soft-Start Power Up

The Auto-Track feature allows the power-up of multiple

modules to be directly controlled from their Track pin.

However in a stand-alone configuration, or when the

Auto-Track feature is not being used, the Track pin should

ure 3-1).

Figure 3–1

5 V

C

IN

1,000 µF

C

OUT

330 µF

GND

GND

3.3 V

R

0.1 W, 1 %

PTH05020W

7

10

4

5

6

2

3

98

Track

V

IN

V

O

GND

Inhibit

1

Up

Dn

Sense

Adjust

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 3–2

Vin (1 V/Div)

Vout (1 V/Div)

Iin (5 A/Div)

HORIZ SCALE: 5 ms/Div

Series

Input Bus

3.3 V

6 A

••••

•

5 V

6 A

••••

•

12 V

6 A

••••

•

3.3 V / 5 V

10 A

••••

•••

12 V

8 A

••••

•••

3.3 V / 5 V

15 A

••••

•••

12 V

12 A

••••

•••

5 V

8 A

••••

•

•

12 V

8 A

••••

•

•

3.3 V / 5 V

22 A

••••

••••

12 V

18 A

••••

••••

5 V

18 A

••••

•

•

•

12 V

16 A

••••

•

•

•

3.3 V / 5 V

30 A

••••

••••

12 V

26 A

••••

••••

PTHxx030

PTHxx010

PTHxx020

PTHxx050

PTHxx060

PTVxx010

PTVxx020