LNBTVS4-221S ,Transil for low noise block protectionAbsolute maximum ratings (T = 25 °C)ambSymbol Parameter Value Unit(1)P Peak pulse power dissipation ..
LNBTVS4-222S ,Transil for low noise block protectionLNBTVSTransil™ for low noise block protectionDatasheet - production dataDescriptionAAThe LNBTVS ser ..
LNBTVS6-220S ,Transil for low noise block protectionFeaturesPlanar technology makes these devices suitable Peak pulse power: for high-end set top box ..
LNBTVS6-221S ,Transil for low noise block protectionelectrical characteristics%IPP100Pulse waveform50tr = rise time (µs)tp = pulse duration time (µs)0t ..
LNBTVS6-221S ,Transil for low noise block protectionLNBTVSTransil™ for low noise block protectionDatasheet - production dataDescriptionAAThe LNBTVS ser ..
LNBTVS6-221S ,Transil for low noise block protectionAbsolute maximum ratings (T = 25 °C)ambSymbol Parameter Value Unit(1)P Peak pulse power dissipation ..
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LNBTVS3-220U-LNBTVS4-220S-LNBTVS4-221S-LNBTVS4-222S-LNBTVS6-220S-LNBTVS6-221S
Transil for low noise block protection
May 2013 DocID17882 Rev 4 1/13
LNBTVSTransil™ for low noise block protection
Datasheet - production data
Features Peak pulse power: up to 3 kW (10/1000 µs) up to 22.5 kW (8/20 µs) Breakdown voltage range: from 23.1 V to 30 V Low clamping factor Unidirectional with low VF (VF = 1.2 V at 3 A) Low leakage current: 0.2 µA at 25 °C Operating T j max : 150 °C Still IEC 61000-4-5 compliant at Tj = 85 °C with
standard footprint High power capability at T jmax: 1250 W (10/1000 µs) JEDEC registered package outline Compatible with LNBH supply and control ICs
Complies with the following standards IEC 61000-4-2 level 4: 15 kV (air discharge) 8 kV (contact discharge) IEC 61000-4-5 MIL STD 883G, method 3015-7: class 3B: 25 kV HBM (human body model) Resin meets UL 94, V0 MIL-STD-750, method 2026 solderability EIA STD RS-481 and IEC 60286-3 packing IPC 7531 footprint
DescriptionThe LNBTVS series has been designed to protect
LNB voltage regulators in satellite set top boxes
against electrostatic discharges according to
IEC 61000-4-2, and MIL STD 883, method 3015,
and electrical over stress according to
IEC 61000-4-4 and 5. These devices can protect
against surges up to 6 kV over the whole
consumer temperature range (up to 85 °C).
Planar technology makes these devices suitable
for high-end set top boxes to provide reliability
and stability over time.
LNBTVS are packaged in either SMB or SMC
(footprints in accordance with IPC 7531
standard).
TM: Transil is a trademark of STMicroelectronics
Table 1. Device summary
Characteristics LNBTVS DocID17882 Rev 4
1 Characteristics
Figure 1. Electrical characteristics - definitions
Figure 2. Pulse definition for electrical characteristics
Table 2. Absolute maximum ratings (Tamb = 25 °C) For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 3. Thermal parameter
DocID17882 Rev 4 3/13
LNBTVS Characteristics
Figure 3. Peak pulse current versus initial junction temperature with regular footprints
(typical values)
Table 4. Electrical characteristics, parameter values (Tamb = 25 °C) To calculate VBR versus junction temperature, use the following formula: VBR @ TJ = VBR @ 25°C x (1 + T x (TJ – 25)). Surge capability given for both directions.
Characteristics LNBTVS4/13 DocID17882 Rev 4
Figure 4. Surge test examples at +4 kV - IEC 61000-4-5, R = 12
Figure 5. Surge test examples at 334 A and 500 A - IEC 61000-4-5, R = 2
DocID17882 Rev 4 5/13
LNBTVS Application information
2 Application information
Figure 6. Application schematic with LNBH23 and LNBTVSx
Figure 7. Application schematic with LNBH23L and LNBTVSx
Application information LNBTVS6/13 DocID17882 Rev 4
Figure 8. Application schematic with LNBH25/26 and LNBTVSxLNBHxx output is usually connected to the antenna cable of digital satellite receivers.
Atmospheric phenomenon can cause high voltage discharges on the antenna cable causing
damages to the attached devices.
In applications where it is required to be protected against lightning surges, transient voltage
suppressor (TVS) devices like LNBTVSx-22xx can be used to protect LNBHxx and the other
devices electrically connected to the antenna cable.
The LNBTVSx-22xx diodes are dedicated lightning and electrical overstress surge
protection for LNBHxx voltage regulators. These protection diodes were designed to comply
with the stringent IEC 61000-4-5 standard with surges up to 500 A with a whole range of
products.
TVS diodes have intrinsic capacitance that attenuates the RF signal. For this reason, the
LNBTVSx-22xx cannot be directly connected to the IF (RX/TX) cable connector that carries
the RF signals coming from the LNB. To suppress the effect of the intrinsic capacitance, an
inductance must be placed in series with the TVS diode (see Figure 9). The goal of the L
series and LNBTVC inductance is to be transparent at 22 kHz and to reject frequencies
higher than 900 MHz.
The value of the series inductance is usually > 13 nH, with a current capability higher than
the Ipp (peak pulse current) expected during the surge.
DocID17882 Rev 4 7/13
LNBTVS Application information
Figure 9. Example of LNBTVS diode connection
