Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

PT4484C Datasheet(PDF) 5 Page - Texas Instruments

Part # PT4484C
Description  36V to 75V Input Voltage Range
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

PT4484C Datasheet(HTML) 5 Page - Texas Instruments

  PT4484C Datasheet HTML 1Page - Texas Instruments PT4484C Datasheet HTML 2Page - Texas Instruments PT4484C Datasheet HTML 3Page - Texas Instruments PT4484C Datasheet HTML 4Page - Texas Instruments PT4484C Datasheet HTML 5Page - Texas Instruments PT4484C Datasheet HTML 6Page - Texas Instruments PT4484C Datasheet HTML 7Page - Texas Instruments PT4484C Datasheet HTML 8Page - Texas Instruments  
Zoom Inzoom in Zoom Outzoom out
 5 / 8 page
background image
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Operating Features of the PT4470 and PT4480
Series of Isolated DC/DC Converters
Under-Voltage Lockout
An Under-Voltage Lock-Out (UVLO) inhibits the
operation of the converter until the input voltage is
above the UVLO threshold (see the applicable data
sheet specification). Below this voltage, the module’s
output is held off, irrespective of the state of the Inhibit
control (pin 3). If the Inhibit control is connected to –Vin
(pin 2), the module will automatically power up when
the input voltage rises above the UVLO threshold. The
UVLO allows the module to produce a clean transition
during both power-up and power-down, even when the
input voltage is rising or falling slowly. It also reduces
the high start-up current during normal power-up of
the converter, and minimizes the current drain from the
input source during low-input voltage conditions. The
UVLO threshold includes about 2V of hysteresis. Once
operational, the converter will conform to its operating
specifications when the minimum specified input voltage
is reached.
Over-Current Protection
To protect against load faults, the PT4470/80 series of
DC/DC converters incorporate an output current limit.
Once the load current drawn from the module reaches
the current limit threshold, any attempt by the load to
draw additional current will result in a significant drop
in the module’s regulated output voltage. The current
limit circuitry incorporates a limited amount of foldback.
This has the effect of slightly reducing the output current
from the module when supplying an absolute short circuit.
Upon removal of the load fault, the output voltage from
the converter will automatically recover to its programmed
regulation voltage.
Output Over-Voltage Protection
The PT4470/80 series of DC/DC converters incorporate
circuitry that continually senses the output for an over-
voltage (OV) condition. The OV threshold automatically
tracks the VID output voltage program setting to a level
25% higher than that programmed at the control pins,
VID0 through VID4. If the converter output voltage
exceeds the OV threshold, the converter is immediately
shut down and remains in a latched-off state. To resume
normal operation the converter must be actively reset.
This is accomplished by either cycling the status of the
Inhibit control (pin 3) from “On” to “Off” and then back
“On” again, or by momentarily removing the input power
to the converter. For failsafe operation and redundancy,
the OV protection uses circuitry that is independent of
the converter’s internal feedback loop.
Over-Temperature Protection
Over-temperature protection is provided by an internal
temperature sensor, which closely monitors the tempera-
ture of the converter’s metal case. If the case temperature
exceeds the specified limit (see applicable data sheet),
the converter will shut down. The converter will then
automatically restart when the sensed temperature drops
by about 10°C. When operated outside its recommended
thermal derating envelope (see data sheet SOA curves),
the converter will typcially cycle on and off at intervals
from a few seconds to one or two minutes. This is to ensure
that the internal components are not permanently damaged
from excessive thermal stress.
Primary-Secondary Isolation
Electrical isolation is provided between the input terminals
(primary) and the output terminals (secondary). All con-
verters are production tested to a primary-secondary
withstand voltage of 1500VDC. This specification com-
plies with UL60950 and EN60950 and the requirements
for operational isolation. Operational isolation allows
these converters to be configured for either a positive or
negative input voltage source. The data sheet ‘Pin-Out
Information’ uses shading to indicate which pins are
associated with the primary. They include pins 1 through
5, inclusive.
Fuse Recommendations
If desired, an input fuse may be added to protect against
the application of a reverse input voltage.
Thermal Considerations
Airflow may be necessary to ensure that the module can
supply the desired load current in environments with
elevated ambient temperatures. The required airflow
rate may be determined from the Safe Operating Area
(SOA) thermal derating chart (see converter specifica-
tions). The recommended direction for airflow is into
the longest side of the module’s metal case. See Figure 1.
Recommended direction for airflow is
into (perpendicular to) the longest side.
Figure 1
PT4470, PT4480 Series


Similar Part No. - PT4484C

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
PT4484 TI-PT4484 Datasheet
151Kb / 7P
[Old version datasheet]   100-W 20-A Programmable Isolated DC/DC Converter
PT4484 TI-PT4484 Datasheet
156Kb / 7P
[Old version datasheet]   100-W 30-A Programmable Isolated DC/DC Converter
PT4484 TI-PT4484 Datasheet
157Kb / 7P
[Old version datasheet]   36V to 75V Input Voltage Range Programmable Output Voltage Range: 1.3V to 3.5V
More results

Similar Description - PT4484C

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM5035C NSC-LM5035C_1 Datasheet
343Kb / 14P
   Input operating range: 36V to 75V Output voltage: 3.3V
LM5039 NSC-LM5039_1 Datasheet
440Kb / 14P
   Input Operating Range: 36V to 75V Output Voltage: 3.3V
logo
Texas Instruments
PT4482N TI-PT4482N Datasheet
157Kb / 7P
[Old version datasheet]   36V to 75V Input Voltage Range Programmable Output Voltage Range: 1.3V to 3.5V
logo
SHANGHAI BELLING CO., L...
BL8023C BELLING-BL8023C Datasheet
471Kb / 6P
   5 to 36V input voltage range
logo
RICOH electronics devic...
R1516 RICOH-R1516 Datasheet
341Kb / 14P
   Input Voltage Range 4V to 36V
R1511 RICOH-R1511 Datasheet
874Kb / 20P
   Input Voltage Range 3.5V to 36V
logo
National Semiconductor ...
LM5046 NSC-LM5046 Datasheet
605Kb / 4P
   Based Eighth Brick Reference Board Input operating range: 36V to 75V
logo
Maxim Integrated Produc...
MAX17498BEVKIT MAXIM-MAX17498BEVKIT Datasheet
1Mb / 7P
   18V to 36V DC Voltage Input Range
Rev 0; 4/12
logo
National Semiconductor ...
LM5046 NSC-LM5046_1 Datasheet
3Mb / 14P
   Input operating range: 36V to 75V Line UVLO (34V/32V on/off)
logo
Maxim Integrated Produc...
MAX20028EVKIT MAXIM-MAX20028EVKIT Datasheet
423Kb / 8P
   3.5V to 36V Input Range
Rev 1; 2/19
More results


Html Pages

1 2 3 4 5 6 7 8


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com