Datasheet

www.ti.com
Features of the PTH/PTV Family of Nonisolated, Wide-Output Adjustable Power Modules
POLA™ Compatibility
Soft-Start Power Up
1
5
6
3
4
+
+
2
V =12V
I
Inhibit
Track
PTH08000W
V Adj
O
V
O
V =3.3V
O
1.87k
0.05W,1%
W
V
I
GND
GND
GND
C
I
100 F
(Required)
µ
C
O
100 F
(Optional)
µ
t-Time=4ms/div
V (5V/div)
I
V (2V/div)
O
I (500mA/div)
I
PTH08000W
SLTS248B – JUNE 2005 – REVISED FEBRUARY 2008
The PTH/PTV family of nonisolated, 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, nonisolated 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
pin should be directly connected to the input voltage, V
I
(see Figure 10 ).
Figure 10. 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 11. Power-Up Waveform
From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically
Copyright © 2005 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s) :PTH08000W