LNBK10SERIES
LNBK20
LNB SUPPLY AND CONTROL VOLTAGE REGULATOR (PARALLEL INTERFACE)
September 1998
s
REDUCED OUTPUT CURRENT VERSION OF LNBP1X AND LNBP20SERIES
s
COMPLETE INTERFACE FOR TWO LNBs REMOTE SUPPLY AND CONTROL
s LNB SELECTION AND STAND-BY FUNCTION s
BUILT-IN TONE OSCILLATOR FACTORY TRIMMED AT 22KHz
s
FAST OSCILLATOR START-UP
FACILITATES DiSEqC ?ENCODING s
TWO SUPPLY INPUTS FOR LOWEST DISSIPATION
s
BYPASS FUNCTION FOR SLAVE OPERATION
s
LNB SHORT CIRCUIT PROTECTION AND DIAGNOSTIC
s
AUXILIARY MODULATION INPUT EXTENDS FLEXIBILITY
s CABLE LENGTH COMPENSATION s
INTERNAL OVER TEMPERATURE PROTECTION
s
BACKWARD CURRENT PROTECTION
DESCRIPTION
Intended for analog and digital satellite receivers,the LNBK is a monolithic linear voltage regulator,assembled in Multiwatt-15,PowerSO-20and PowerSO-10,specifically designed to provide the powering voltages and the interfacing signals to the LNB downconverter situated in the antenna via the coaxial cable.It has the same functionality of the LNBP1X and LNBP20series,at a reduced output current capability.Since most satellite receivers have two antenna ports,the output voltage of the regulator is available at one of two logic-selectable output pins (LNBA,LNBB).When the IC is powered and put in Stand-by (EN pin LOW),both regulator outputs are disabled to allow the antenna downconverters to be supplied/controlled by others satellite receivers sharing the same coaxial lines.In this occurrence the device will limit at 3mA (max)the backward current that could flow from LNBA and LNBB output pins to GND.
For slave operation in single dish,dual receiver systems,the bypass function is implemented by an electronic switch between the Master Input pin
(MI)and the LNBA pin,thus leaving all LNB powering and control functions to the Master Receiver.This electronic switch is closed when the device is powered and EN pin is LOW.
The regulator outputs can be logic controlled to be 13or 18V (typ.)by mean of the VSEL pin for remote controlling of LNBs.Additionally,it is possible to increment by 1V (typ.)the selected voltage value to compensate the excess voltage drop along the coaxial cable (LLC pin HIGH).
In order to reduce the power dissipation of the device when the lowest output voltage is selected,the regulator has two Supply Input pins V CC1and V CC2.They must be powered respectively at 16V (min)and 23V (min),and an internal switch automatically will select the suitable supply pin according to the selected output voltage.If adequate heatsink is provided and higher power losses are acceptable,both supply pins can be powered by the same 23V source without affecting any other circuit performance.
The ENT (Tone Enable)pin activates the internal oscillator so that the DC output is modulated by a ±0.3V,22KHz (typ.)square wave.This internal
Multiwatt-15
1
10
PowerSo-20PowerSO-10
?
1/18
oscillator is factory trimmed within a tolerance of ±2KHz,thus no further adjustments neither external components are required.
A burst coding of the 22KHz tone can be accomplished thanks to the fast response of the ENT input and the prompt oscillator start-up.This helps designers who want to implement the DiSEqC ?protocols (*).
In order to improve design flexibility and to allow implementation of newcoming LNB remote control standards,an analogic modulation input pin is available (EXTM).An appropriate DC blocking capacitor must be used to couple the modulating signal source to the EXTM pin.When external modulation is not used,the relevant pin can be left open.
Two pins are dedicated to the overcurrent protection/monitoring:CEXT and OLF.The overcurrent protection circuit works dynamically:as soon as an overload is detected in either LNB output,the output is shut-down for a time Toff determined by the capacitor connected between
CEXT and GND.Simultaneously the OLF pin,that is an open collector diagnostic output flag,from HIGH IMPEDANCE state goes LOW.After the time has elapsed,the output is resumed for a time t on =1/15t off (typ.)and OLF goes in HIGH IMPEDANCE.If the overload is still present,the protection circuit will cycle again through t off and t on until the overload is removed.Typical t on +t off value is 1200ms when a 4.7μF external capacitor is used.
This dynamic operation can greatly reduce the power dissipation in short circuit condition,still ensuring excellent power-on start up even with highly capacitive loads on LNB outputs.
The device is packaged in Multiwatt15for thru-holes mounting and in PowerSO-20for surface mounting.When a limited functionality in a smaller package matches design needs,a range of cost-effective PowerSO-10solutions is also offered.All versions have built-in thermal protection against overheatingdamage.
(*):External components are needed to comply to level 2.x and above (bidirectional)DiSEqC ?bus hardware requirements.DiSEqC ?is a trademark of EUTELSAT.
ORDERING NUMBERS
Type
Multiwatt-15PowerSO-20PowerSO-10
LNBK10LNBK11LNBK12LNBK13LNBK14LNBK15LNBK16LNBK20
LNBK20CR (*)LNBK20PD
LNBK10SP (*)LNBK11SP (*)LNBK12SP (*)LNBK13SP (*)LNBK14SP (*)LNBK15SP (*)LNBK16SP (*)
PIN CONFIGURATIONS
Multiwatt-15
PowerSO-20PowerSO-10
(*)Available on request
LNBK10SERIES -LNBK20
2/18
TABLE A:PIN CONFIGURATIONS
SYMBOL NAME FUNCTION PIN NUMBER vs SALES TYPE(LNBK)
20CR20PD10SP11SP12SP13SP14SP15SP16SP V CC1Supply Input115V to27V supply.It is
automatically selected
when V OUT=13or14V
121111111
V CC2Supply Input222V to27V supply.It is
automatically selected
when V OUT=18or19V
232222222
LNBA Output Port See truth tables for voltage
and port selection.In
stand-by mode this port is
powered by the MI pin via
the internal Bypass Switch
343333333
VSEL Output Voltage
Selection:13or
18V(typ)Logic control input:See
truth table
454444444
EN Port Enable Logic control input:See
truth table
565555555
OSEL Port Selection Logic control input:See
truth table
779NA NA NA NA NA NA
GND Ground Circuit Ground.It is
internally connected to the
die frame 81
10
11
20
6666666
ENT22KHz Tone
Enable Logic control input:See
truth table
9137777777
CEXT External Capacitor Timing capacitor used by
the Dynamic Overload
Protection.Typical
application is4.7μF for a
1200ms cycle
10148888888
EXTM External
Modulation External Modulation Input.
Needs DC decoupling to
the AC source.If not used,
can be left open.
1115NA NA NA9NA99
LLC Line Length
Compens(+1V typ)Logic control input:See
truth table
1216NA NA9NA9NA10
OLF Over Load Flag Logic output(open
Collector).Normally in
HIGH IMPEDANCE,goes
LOW when current or
thermal overload occurs.
1317NA9NA NA1010NA
MI Master Input In stand-by mode,the
voltage on MI is routed to
LNBA pin.Can be left
open if bypass function is
not needed
1418NA101010NA NA NA
LNBB Output Port See truth tables for voltage
and port selection.
151910NA NA NA NA NA NA NOTE:The limited pin availability of the PowerSO-10package leads to drop some functions.
LNBK10SERIES-LNBK20
3/18
LNBK10SERIES-LNBK20
ABSOLUTE MAXIMUM RATING
Symbol Parameter Value Unit V i DC Input Voltage(VCC1,VCC2,MI)28V
I o Output Current(LNBA,LNBB)Internally limited
V i Logic Input Voltage(ENT,EN,OSEL,VSEL,LLC)-0.5to7V
I SW Bypass Switch Current900mA
P t ot Power Dissipation at T case<85o C14W T stg Storage Temperature Range-40to150o C T o p Operating Junction Temperature Range-40to125o C Absolute Maximum Ratings are those values beyond which damage to the device may occur.Functional operation under these conditions is not implied
THERMAL DATA
Symbol Parameter Value Unit R t hj-case Thermal Resistance Junction-case2o C/W
LOGIC CONTROLS TRUTH TABLES
Control I/O Pin Name L H OUT OLF I OUT>I OMAX or T j>150O C I OUT
IN ENT22KHz tone OFF22KHz tone ON
IN EN See table below See table below
IN OSEL See table below See table below
IN VSEL See table below See table below
IN LLC See table below See table below
EN OSEL VSEL LLCP V LNBA V LNBB
L X X X V MI-0.4V(typ.)Disabled
H L L L13V(typ.)Disabled
H L H L18V(typ.)Disabled
H L L H14V(typ.)Disabled
H L H H19V(typ.)Disabled
H H L L Disabled13V(typ.)
H H H L Disabled18V(typ.)
H H L H Disabled14V(typ.)
H H H H Disabled19V(typ.)
NOTE:All logic input pins have internal pull-down resistor(typ.=250K?)
4/18
LNBK10SERIES-LNBK20 BLOCK DIAGRAM
5/18
ELECTRICAL CHARACTERISTICS FOR LNBK SERIES(T j=0to85o C,C i=0.22μF,C o=0.1μF, EN=H,ENT=L,LLC=L,V IN1=16V,V IN2=23V,I OUT=50mA,(unless otherwise specified)
Symbol Parameter Test Conditions Min.Typ.Max.Unit
V IN1V CC1Supply Voltage I O=400mA,ENT=H,VSEL=L,LLC=L
I O=400mA,ENT=H,VSEL=L,LLC=H 15
16
27
27
V
V
V IN2V CC2Supply Voltage I O=400mA,ENT=VSEL=H,LLC=L
I O=400mA,ENT=VSEL=H,LLC=H 22
23
27
27
V
V
V O1Output Voltage I O=400mA,VSEL=H,LLC=L
I O=400mA,VSEL=H,LLC=H 17.318
19
18.7V
V
V O2Output Voltage I O=400mA,VSEL=L,LLC=L
I O=400mA,VSEL=L,LLC=H 12.513
14
13.5V
V
?V O Line Regulation V IN1=15to19V,V OUT=13V
V IN2=22to26V,V OUT=18V 5
5
50
50
mV
mV
?V O Load Regulation V IN1=V IN2=22V,V OUT=13or18V,
I O=50to400mA
65150mV SVR Supply Voltage Rejection V IN1=V IN2=23±0.5V ac,f ac=50KHz45dB
I MAX Output Current Limiting400500600mA
t OFF Dynamic Overload Protection
OFF Time
Output shorted,C EXT=4.7μF1100ms
t ON Dynamic Overload Protection
ON Time
Output shorted,C EXT=4.7μF t OFF/15ms F TONE Tone Frequency ENT=H202224KHz A TONE Tone Amplitude ENT=H0.40.60.8Vpp D T ONE Tone Duty Cucle ENT=H405060%
t r,t f Tone Rise or Fall Time ENT=H51015μs G EXT M External Modulation Gain?V OUT/?V EXTM,f=10Hz to40KHz5
V EXTM External Modulation Input
Voltage
AC Coupling400mV pp
Z EXT M External Modulation
Impedance
f=10Hz to40KHz400?
V SW Bypass Switch Voltage Drop
(MI to LNBA)
EN=L,I SW=300mA,V CC2-V MI=4V0.350.6V V OL Overload Flag Pin Logic Low I OL=8mA0.280.5V
I OZ Overload Flag Pin OFF State
Leakage Current
V OH=6V10μA V IL Control Input Pin Logic Low0.8V V I H Control Input Pin Logic High 2.5V
I IH Control Pins Input Current V IH=5V20μA
I CC Supply Current Outputs Disabled(EN=L)0.31mA
I CC Supply Current ENT=H,I OUT=400mA 3.16mA
I OBK Output Backward Current EN=L,V LNBA=V LNBB=18V
V IN1=V IN2=22V or floating
0.23mA T SHDN Thermal Shutdown Threshold150o C LNBK10SERIES-LNBK20
6/18
Output Voltage vs Output Current
Tone Duty Cycle vs Temperature Tone Fall Time vs Temperature Tone Rise Time vs Temperature Tone Amplitude vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS(unless otherwise specified T j=25o C)
Tone Frequency vs Temperature
LNBK10SERIES-LNBK20
7/18
S.V.R.vs Frequency
External Modulation vs Temperature Bypass Switch Drop vs Output Current
Overload Flag pin Logic Low vs Flag Current
TYPICAL PERFORMANCE CHARACTERISTICS (continued)LNBA External Modulation Gain vs Frequency
Bypass Switch Drop vs Output Current LNBK10SERIES -LNBK20
8/18
TYPICAL PERFORMANCE CHARACTERISTICS (continued)Supply Current vs Temperature
Dynamic Overload protection (I SC vs Time)Tone Enable
22KHz Tone
Supply Current vs Temperature
Tone Disable LNBK10SERIES -LNBK20
9/18
TYPICAL PERFORMANCE CHARACTERISTICS (continued)Enable Time
18V to 13V Change 13V to 18V Change
Disable Time
LNBK10SERIES -LNBK20
10/18
TYPICAL APPLICATION SCHEMATICS JA
JB
ANT CONNECTORS
17V 24V
MCU+V
VCC11VCC22LNBA 3LNBB
15GND
8
LLC 12
EXTM
11
OSEL 7EN 5ENT 9VSEL 4OLF
13
MI 14CEXT
10
LNBK20CR
C2
10uF
R147K
AUX DATA
C3
2x 0.1μF C1
4.7μF C4
C6
C5
2x 47nF
TUNER
I/Os
MCU
I/Os
Vcc +
SINGLE ANTENNA RECEIVER WITH MASTER RECEIVER PORT
24V
17V MCU+V
VCC11VCC22LNBA 3LNBB 15GND
8
LLC 12
EXTM
11
OSEL 7EN 5ENT 9VSEL 4OLF
13
MI 14CEXT
10
LNBK20CR
C2
10uF
AUX DATA
R147K
TUNER
ANT
MASTER
C4
C547nF
C3
2x 0.1μF
C1
4.7μF I/Os
Vcc MCU
I/Os
+
TWO ANTENNA PORTS RECEIVER
LNBK10SERIES -LNBK20
11/18
TYPICAL APPLICATION SCHEMATICS (continued)VCC11VCC22LNBA 3LNBB
15GND
8
LLC 12
EXTM
11
OSEL 7EN 5ENT 9VSEL 4OLF 13
MI 14CEXT
10
LNBK20CR C2
10uF
MCU+V
R147K
AUX DATA
STR 1D 2CLK 3OE
15
Q14Q25Q36Q47Q514Q613Q712Q811QS 9QS
10
4094
TUNER
JA
JB
C4
C6
C5
2x 47nF
C3
2x 0.1μF
C1
4.7μF MCU+V
SERIAL BUS
MCU
I/Os Vcc
+
17V
24V
TWO ANTENNA PORTS RECEIVER:LOW COST SOLUTION
JA
JB
ANT CONNECTORS
17V
24V
VCC11VCC22LNBA 3LNBB
10
GND
6
CEXT
8OSEL
9
EN 5ENT 7VSEL 4LNBK10SP
C3
2x 0.1μF
C14.7μF
C4
C6
C5
2x 47nF
TUNER
I/Os
MCU
MCU+V
I/Os
Vcc +
USING SERIAL BUS TO SAVE MPU I/Os
LNBK10SERIES -LNBK20
12/18
JA
JB
ANT CONNECTORS
24V
VCC11VCC22LNBA 3LNBB
10
GND
6
CEXT
8OSEL
9
EN 5ENT 7VSEL 4LNBK10SP
C14.7μF C6
C5
2x 47nF
C4
0.1μF
TUNER
I/Os
MCU
MCU+V
I/Os
Vcc +
SINGLE ANTENNA RECEIVER WITH MASTER RECEIVER PORT:LOW COST SOLUTION
24V
17V
VCC11VCC22LNBA
3MI
10GND
6
CEXT
8
EXTM
9
EN
5
ENT 7VSEL 4LNBK13SP
C2
10μF
AUX DATA
TUNER
ANT
MASTER
C4
C547nF
C3
2x 0.1μF
C1
4.7μF MCU+V
I/Os
Vcc MCU
I/Os
+
CONNECTING TOGETHER V CC1AND V CC2
TYPICAL APPLICATION SCHEMATICS (continued)LNBK10SERIES -LNBK20
13/18
24V
17V
MCU+V
C2
10μF
VCC11VCC22LNBA
3
GND
6
CEXT
8EXTM
9
EN
5
ENT 7
VSEL 4
OLF
10
LNBK15SP
AUX DATA
R1
47K
TUNER
ANT
C4
C547nF
C3
2x 0.1μF C14.7μF Vcc I/Os
MCU
I/Os
+
SINGLE ANTENNA RECEIVER WITH OVERLOAD DIAGNOSTIC
TYPICAL APPLICATION SCHEMATICS (continued)
LNBK10SERIES -LNBK20
14/18
DIM.mm inch MIN.
TYP.
MAX.MIN.
TYP.
MAX.A 50.197B 2.650.104C 1.60.063D 1
0.039
E 0.490.550.0190.022
F 0.660.750.0260.030
G 1.02 1.27 1.520.0400.0500.060G117.5317.7818.030.6900.700
0.710H119.60.772H220.20.795L 21.922.222.50.8620.8740.886L121.722.122.50.8540.8700.886L217.6518.10.6950.713L317.2517.517.750.6790.6890.699L410.310.710.90.4060.4210.429L7 2.65 2.90.1040.114M 4.25 4.55 4.850.1670.1790.191M1 4.63 5.08
5.530.1820.200
0.218S 1.9 2.60.0750.102S1 1.9 2.60.0750.102Dia1
3.65
3.85
0.144
0.152
0016036
MULTIWATT-15MECHANICAL DATA
LNBK10SERIES -LNBK20
15/18
DIM.mm inch MIN.TYP.
MAX.MIN.TYP.
MAX.A 3.600.1417a10.100.300.00390.0118a2 3.300.1299a300.1000.0039b 0.400.530.01570.0209c 0.230.320.0090.0126D (1)15.8016.000.62200.6299E 13.9014.50
0.54720.570
e 1.270.050e311.43
0.450
E1(1)10.9011.100.42910.437E2 2.900.1141G 00.100
0.0039h 1.100.0433L 0.80
1.10
0.0314
0.0433
N 10o
(max.)S 8o (max.)
T
10.00.3937
e
a2
A
E
a1
PSO20MEC
DETAILA
T
D
110
11
20
E1
E2
h x 45°
DETAILA
lead
slug
a3
S
Gage Plan e
0.35
L
DETAILB
R
DETAILB
(COPLANARITY)
G
C
-C -
SEATING PLANE
e3
b
c
N
N 0056635
PowerSO-20MECHANICAL DATA
(1)”D and E1”do not include mold flash or protusions
-Mold flash or protusions shall not exceed 0.15mm (0.006”)
LNBK10SERIES -LNBK20
16/18
DIM.mm
inch MIN.TYP.
MAX.MIN.TYP.
MAX.A 3.35 3.650.1320.144A10.000.100.0000.004B 0.400.600.0160.024c 0.350.550.0130.022D 9.409.600.3700.378D17.407.600.2910.300E 9.309.500.3660.374E17.207.400.2830.291E27.207.600.2830.300E3 6.10 6.350.2400.250E4 5.90
6.10
0.232
0.240
e 1.27
0.050
F 1.25 1.350.0490.053H 13.80
14.40
0.543
0.567
h 0.50
0.002
L 1.20
1.80
0.047
0.071
q 1.70
0.067
α
o
8o DETAIL ”A”
PLANE
SEA TING α
L
A1F A1
h
A
D
D1===
=
=
=
E4
0.10A E1
E3C
Q
A
=
=
B
B
DETAIL ”A”
SEATING PLANE
==
=
=
E26
10
5
1
e
B
H E M
0.25
=
=
==0068039-C
PowerSO-10MECHANICAL DATA
LNBK10SERIES -LNBK20
17/18
Information furnished is believed to be accurate and reliable.However,STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use.No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics.Specification mentioned in this publication are subject to change without notice.This publication supersedes and replaces all information previously supplied.STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a trademark of STMicroelectronics ?1998STMicroelectronics –Printed in Italy –All Rights Reserved
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LNBK10SERIES -LNBK20
18/18