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LNBP8 LNBP9
LNB SUPPLY AND CONTROL VOLTAGE REGULATOR
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SIMPLEST INTEGRATED SOLUTION FOR THE LNB REMOTE SUPPLY AND CONTROL 500mA GUARANTEED OUTPUT CURRENT DUAL INPUT SUPPLY FOR REDUCING POWER DISSIPATION 22KHZ BUILT-IN TONE OSCILLATOR (LNBP9 VERSION) FAST OSCILLATOR START-UP FOR DiSEqCTM ENCODING (LNBP9 VERSION) AUXILIARY MODULATION INPUT FOR MORE FLEXIBILITY (LNBP8 VERSION) STAND-BY FUNCTION SHORT CIRCUIT AND OVERTEMPERATURE PROTECTION AVAILABLE IN THRU-HOLE PACKAGE
Heptawatt
DESCRIPTION Intended for analog and digital satellite receivers, the LNBP is a monolithic linear voltage regulator, assembled in HeptawattTM, specifically designed to provide the powering voltages and the interfacing signals to the LNB down-converter. The regulator output can be logic controlled to be 13V or 18V (typ.) by mean of the VSEL pin for the remote controlling of the LNB. In order to reduce the power dissipation of the device when the lowest output voltage is selected, the regulator has 2 supply inputs (VCC1 and VCC2). They must be powered respectively at 15V (min.) and 22V (min.), and an internal switch will automatically select the appropriate supply voltage according to the selected output voltage. The TONE pin (only for the LNBP9 version) activates the internal oscillator so that the DC output is modulated by a 22KHz square wave. This internal oscillator is factory trimmed within a Table 1: Order Codes
TYPE LNBP8 LNBP9
tolerance of +/- 2KHz, thus no further adjustment or external components are required. A burst coding of the 22KHz tone can be accomplished thanks to the fast response of the TONE input and the prompt oscillator start-up. This helps designers which want to implement the DiSEqCTM protocols. In order to improve design flexibility and to allow implementation of other LNB remote control standards, an analogic modulation input pin (EXTM) is available (LNBP8 version only). An appropriate DC blocking capacitor must be used to couple the modulating signal source to the EXTM pin. Both versions integrate thermal and short circuit protection. The device is packaged in Heptawatt for an easy thru-hole mounting. If an 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. When the IC is powered and put in Stand-by (EN pin LOW), the regulator output is disabled and the IC power consumption is reduced to 300A typ.
HEPTAWATT LNBP8V7V LNBP9V7V
November 2004
Rev. 1
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LNBP8 - LNBP9
Figure 1: Pin Configuration (top view)
Table 2: Pin Descriptions
PIN N 1 2 3 4 5 6 7 (LNBP9) 7 (LNBP8) NAME VCC1 VCC2 GND VSEL ENABLE TONE EXTM FUNCTION Supply Input 1: 15V to 25V supply. It is automatically selected when VO = 13V Supply Input 2: 22V to 25V supply. It is automatically selected when VO = 18V GROUND Output Voltage Selection: Logic Control Input; if LOW VO = 13V, when HIGH VO = 18V Logic Control Input; force LOW to put the IC in shutdown Logic Control Input; force HIGH to activate the internal 22KHz tone External Modulation: Needs DC decoupling to the AC source. If not used can be left floating
OUTPUT Regulator output. It is 13V typ. when VSEL LOW and 18V typ. when VSEL HIGH
Table 3: Absolute Maximum Ratings
Symbol VCC1, VCC2 Input Voltage ENABLE, Logic Input Voltage TONE, VSEL OUTPUT TJ TSTG Output Voltage Operating Junction Temperature Range Storage Temperature Range Parameter Value -0.3 to 28 -0.3 to 7 28 -40 to 125 -55 to 150 Unit V V V C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Table 4: Thermal Data
Symbol RTHJ-C Parameter Thermal Resistance Junction-case Value 2 Unit C/W
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LNBP8 - LNBP9
Figure 2: Block Diagram
Table 5: Electrical Characteristics (VCC1 = 16V, VCC2 = 22V, CI1 = CI2 = 0.22F, CO =0.1F, ENABLE = H, TONE = L (LNBP9), EXTM floating (LNBP8), IO = 50mA, TJ = 0 to 85C unless otherwise specified.)
Symbol VCC1 VCC2 VO VO VO IMAX fTONE ATONE DTONE tr, tf Parameter VCC Supply Input 1 VCC Supply Input 2 Output Voltage Line Regulation Load Regulation Output Current Limiting Tone Frequency Tone Amplitude Tone Duty Cycle Tone Rise and Fall Time LNBP9 version, TONE = H LNBP9 version, TONE = H LNBP9 version, TONE = H LNBP9 version, TONE = H LNBP8 version, VO/VEXTM, f = 10Hz to 40KHz LNBP8 version, AC Coupling LNBP8 version, f = 10Hz to 40KHz ENABLE, TONE (LNBP9 version), VSEL ENABLE, TONE (LNBP9 version), VSEL VIH = 5V, ENABLE, TONE (LNBP9 version), VSEL Output Disabled (ENABLE = L) Output Enabled (ENABLE = H), TONE = H IO = 500mA 2.5 20 0.3 3 150 1 6 Test Conditions IO = 500 mA, TONE = H, VSEL = L IO = 500 mA, TONE = H, VSEL = H IO = 500 mA, VSEL = L IO = 500 mA, VSEL = H VCC1 = 15 to 18V, VSEL = L VCC2 = 22 to 25V, VSEL = H VCC1 = VCC2 = 22V, IO = 50 to 500mA VSEL = L or H 500 20 0.55 40 5 22 0.72 50 10 5 400 400 0.8 mV V V A mA mA C Min. 15 22 12.5 17.3 13 18 4 4 80 Typ. Max. 25 25 13.5 18.7 40 40 180 800 24 0.9 60 15 mV mA KHz V % s Unit V V V V mV
GEXTM External Modulation Gain VEXTM ZEXTM VIL VIH IIH ICC External Modulation Input Voltage External Modulation Impedance Control Input Logic LOW Control Input Logic HIGH Control Pins Input Current Supply Current
TSHDN
Temperature Shutdown
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LNBP8 - LNBP9
TYPICAL APPLICATION CIRCUITS Figure 3: LNBP9 with 22KHz Tone Control Pin
Figure 4: LNBP8 with external 22KHz Input Pin (EXTM)
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LNBP8 - LNBP9
Figure 5: Single Supply Solution
(1) In a single supply configuration the presence of the input resistor in the 12-15 range is suggested only to reduce the device power dissipation during the 13V output condition. The resistor can be omitted in spite of power dissipation increase. (2) The input diodes are mandatory to protect the device from any reverse current.
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LNBP8 - LNBP9
HEPTAWATT (VERTICAL) MECHANICAL DATA
DIM. A C D D1 E F G G1 G2 H2 H3 L L1 L2 L3 L4 L5 L6 L7 M M1 Dia1 MIN. mm. TYP MAX. 4.8 1.37 2.8 1.35 0.55 0.8 2.74 5.28 7.82 10.4 10.4 17.10 21.84 22.77 1.29 3 15.8 6.6 3.05 5.33 3.85 MIN. inch TYP. MAX. 0.189 0.054 0.110 0.053 0.022 0.031 0.108 0.208 0.308 0.409 0.409 0.673 0.860 0.896 0.051 0.118 0.622 0.260 0.120 0.210 0.152
2.4 1.2 0.35 0.6 2.34 4.88 7.42 10.05 16.70 21.24 22.27 2.6 15.1 6 2.55 4.83 3.65
2.54 5.08 7.62
0.094 0.047 0.014 0.024 0.092 0.192 0.292 0.396 0.657 0.836 0.877 0.102 0.594 0.236 0.100 0.190 0.144
0.100 0.200 0.300
16.90 14.92 21.54 22.52 2.8 15.5 6.35 2.8 5.08
0.665 0.587 0.848 0.887 0.110 0.610 0.250 0.110 0.200
0016069/F
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LNBP8 - LNBP9
Table 6: Revision History
Date 09-Nov-2004 Revision 1 First Release. Description of Changes
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LNBP8 - LNBP9
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. Specifications 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 registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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