LNBTVSx-22xx
Lightning protection for LNB power supply
Features
■
■
■
■
■
3 kV, 4 kV and 6 kV protection (8/20 µs)
Axial & SMD package
Unidirectional and low V
F
(V
F
= 1.2 V at I
F
= 3 A)
Low clamping factor
Fast response time
K
A
A
K
K
A
DO-201
SMB
SMC
Description
The LNBTVSx-22xx is a dedicated lightning and
electrical overstress surge protection for LNB
voltage regulators in satellite set top box
applications.
This device provides the lightning protection
required to pass the IEC and FCC regulations.
Available in axial, SMB and SMC packages, this
device is compatible with industry standard
mounting processes.
Order Code
Part number
LNBTVS3-220
LNBTVS3-220U
LNBTVS4-220
Table 1.
Symbol
P
PP
P
Absolute maximum ratings (T
amb
= 25° C)
Peak pulse power dissipation
(1)
Peak dissipation on infinite heatsink
O
so
b
I
FSM
T
stg
T
j
T
L
te
le
r
P
uc
od
s)
t(
so
b
-O
LNBTVS4-220S
LNBTVS4-221
et
l
P
e
od
r
s)
t(
uc
Marking
LC
LAA
LNBTVS3-220
LNBTVS4-220
LNBTVS4-221
LAB
LAC
LBA
LBB
LNBTVS4-221S
LNBTVS4-222S
LNBTVS6-220S
LNBTVS6-221S
Parameter
T
j
initial = T
amb
T
amb
= 75° C
T
p
= 10 ms
T
j
initial = T
amb
Value
up to 3 kW
5
200
-65 to + 175
150
230
Unit
W
W
A
°C
°C
°C
Non repetitive surge peak forward current for unidirectional types
Storage temperature range
Maximum junction temperature
Maximum lead temperature for soldering during 10 s at 5 mm from case
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
January 2007
Rev 3
1/9
www.st.com
Characteristics
LNBTVSx-22xx
1
Table 2.
Symbol
R
th (j-l)
R
th (j-a)
R
th (j-l)
R
th (j-a)
R
th (j-l)
R
th (j-a)
Characteristics
Thermal resistance
Parameter
Junction to leads
Junction to ambient on printed circuit L
lead
= 10 mm
Junction to case
Junction to ambient on printed circuit
Junction to case
Junction to ambient on printed circuit
Package
DO-201
DO-201
SMB
SMB
SMC
SMC
Value
20
75
20
100
20
75
Unit
° C/W
° C/W
° C/W
° C/W
° C/W
° C/W
Table 3.
Symbol
V
BR
I
RM
V
RM
V
CL
I
PP
R
I/O
C
line
I
F
V
F
Electrical characteristics (T
amb
= 25° C)
Parameter
Breakdown voltage
Leakage current @ V
RM
Stand-off voltage
Clamping voltage
Peak pulse current
Series resistance between
Input & Output
Input capacitance per line
Forward current
Forward voltage
I
I
F
V
CL
V
BR
V
RM
Type
I
RM
@V
RM
Max
Unidirectional
LNBTVS3-220
LNBTVS4-220
μA
1
1
1
1
1
1
1
1
1
LNBTVS3-220U
b
O
LNBTVS4-220S
LNBTVS4-221
LNBTVS4-221S
LNBTVS4-222S
LNBTVS6-220S
LNBTVS6-221S
so
te
le
r
P
V
uc
od
Min
V
22
22
22
22
22
22
22
22
22
V
BR
@ I
R
s)
t(
V
bs
-O
mA
1
1
1
1
1
1
1
1
1
W
1500
1500
1800
1800
2000
2000
3000
3000
3000
et
l
o
P
e
od
r
V
F
s)
t(
uc
V
I
RM
I
R
I
PP
P
PP
10/1000 µS
V
CL
@ I
pp
10/1000
µs
Max
V
33.2
33.2
33.2
33.2
33.2
33.2
33.2
33.2
33.2
A
45
45
55
55
60
60
90
90
90
V
CL
@ I
pp
8/20
µs
(1)
Max
V
35
35
35
35
32
32
30
35
32
A
250
250
331
331
331
331
331
500
500
αT
Max
10
-4
/°C
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
C
Typ
pF
3000
3000
3500
3500
5500
5500
6000
6000
6000
Typ Max
V
20
20
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
23.1 24.2
20
20
20
20
20
20
20
1. IEC 61000-4-5 R = 12
Ω
2/9
LNBTVSx-22xx
Figure 1.
Characteristics
Surge test examples at +4 kV - IEC 61000-4-5 - with series resistor of 12
Ω
LNBTVS4-220S
LNBTVS4-221S
LNBTVS6-221S
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
3/9
Application
LNBTVSx-22xx
2
Application
Figure 2.
Gate
Sense
Step-
Controller
Application diagram
LNBP/S
Feedback
LT1
LT2
L
Vup
Vcc
Byp
OUT
Preregul.
U.V.lockout
+P.ON
Enable
I
V
Linear Post-reg
+Modulator
+Protection
R
EXTM
SCL
Diagnostics
SDA
ADDR
DSQIN
I²C
22 kHz
Oscill
Tone
Detector
DETIN
DSQOUT
LNBTVSx-22xx
Table 4.
Optimized fit to ST voltage regulators
LNB voltage regulators
Recommended lightning protections
LNBP20, LNBP11x, LNBP8/9 LNBTVS3-220/x, LNBTVS4-220/x, LNBTVS6-220S, LNBTVS6-221S
LNBS21, LNBP21
LNBH21, LNBH221,
LNBH22, LNBEH21,
LNBEH221
LNBH23, LNBH24
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
LNBTVS4-222S, LNBTVS6-221S
et
l
o
P
e
od
r
s)
t(
uc
LNBTVS4-220/x, LNBTVS4-221/x, LNBTVS6-221S
LNBTVS4-221/x, LNBTVS4-222S, LNBTVS6-221S
4/9
LNBTVSx-22xx
Ordering information scheme
3
Ordering information scheme
LNB
Low noise block regulator
Transient voltage suppressor
Lightning surge level
3 = 3 kV
4 = 4 kV
6 = 6 kV
V
BR
22 = 22 V
V
CL
0 = 35 V
1 = 32 V
2 = 30 V
Package
U = SMB
S = SMC
Blank = DO201
TVS
x
- 22
xx
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
5/9
