| A new lightning protection for LNB power
supply |
 |
| Datasheet | Orderable
Products | Features
and Description | Documentation |
| |
| Datasheet |
| Reference |
Title |
LNBTVSx-22xx
|
Lightning protection for LNB power supply
(21 Oct 2005, 96KB) Download |
|
| |
| Orderable Products |
| Device |
Status |
RoHS |
Package |
Purchase |
| LNBTVS3-220 |
Active |
Converted |
DO201 |
|
| LNBTVS3-220U |
Active |
Converted |
CB472 2 |
|
| LNBTVS4-220 |
Active |
Converted |
DO201 |
|
| LNBTVS4-220S |
Active |
Converted |
CB473 2 |
|
| LNBTVS4-221 |
Active |
Converted |
DO201 |
|
| LNBTVS4-221S |
Active |
Converted |
CB473 2 |
|
| LNBTVS4-222S |
Active |
Converted |
CB473 2 |
|
| LNBTVS6-220S |
Active |
Converted |
CB473 2 |
|
| LNBTVS6-221S |
Active |
Converted |
CB473 2 |
|
|
 |
| Features and Description |
 |
3kV, 4kV and 6kV protection (8/20µs) |
|
Axial and SMD package |
|
Unidirectional and Low VF |
|
Low clamping factor |
|
Fast response time |
|
UL recognize |
|
An LNB is a low noise block
module, placed at the focus of the satellite dish
(parabolic antenna) that provides down conversion of the incoming
signal, signal amplification with good noise characteristics,
selection of vertical or horizontal polarization and
selection of operating band.
To offer Satellite Set Top Box manufacturers the best trade-off
between cost and lightning protection of the LNB voltage regulator, STMicroelectronics
has introduced the new dedicated and optimized LNBTVSx-22x devices.
The LNB is remotely powered from the satellite receiver. The same coaxial cable
that carries the IF signal from the LNB to the receiver carries power from the
receiver to the LNB. The 13V to 18V DC is generated by a dedicated IC, a LNB
Voltage Regulator.
This device can be damaged by any lightning
surges that can occur on the coaxial cable and
generate high current – high voltage surge. The
current surge the LNB voltage regulator (IC) has to
withstand ranges from 250A (when 3kV is applied) to
500A (when 6kV is applied). This IC
can not withstand such high value energy.
To comply with this IEC regulation and to protect the LNB Voltage Regulator IC
against any damage from lightning events, a dedicated and optimized protection
device is required in front of the voltage regulator.
The best in class solution for cost effective and reliable protection are the
new LNBVTVSx-22xx devices from STMicroelectronics. All devices
are available and are in mass production.
|
| |
| Key benefits: |
|
Simple and low cost solution |
|
Replace current solutions at lower cost and better performance |
|
High reliability protection solution |
|
Dedicated and optimized for LNB Voltage Regulator protection |
|
Complies with LNB supply voltages |
|
Complies with IEC61000-4-5 standard |
|
Compatible with all LNB Voltage Regulator types and references |
|
Criteria
|
Benefits
|
LNBTVS series
|
Other solutions
|
| Lightning protection |
Up to 6kV – 500A |
++
|
+
|
| Reliability longevity |
No diodes paralleling |
++
|
-
|
| Coverage vs LNB regulator |
P/N range |
++
|
-
|
| Cost |
Low |
++
|
+
|
| Design safety |
Dedicated for LNB regulator protection |
++
|
+
|
|
LNBTVS series
enhanced benefits
|
|
| Documentation |
| Technical Article |
| Reference |
Title |
| TA0321 |
Lightning protection or LNB supply and control voltage
regulator
(16 Jan 2006, 180KB) Download |
| |
|
| Promotional Documents |
| Reference |
Title |
| FLASDCONS/0104 |
Rectifiers, Protection & IPAD™ for Consumer
applications
(Jan 2004, 273KB) Download |
|
