LNBP21 STMicroelectronics, LNBP21 Datasheet
LNBP21
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LNBP21 Summary of contents
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... October 2004 LNBP SUPPLY AND CONTROL IC WITH TM DESCRIPTION Intended for analog and digital satellite STB receivers/SatTV, sets/PC cards, the LNBP21 is a monolithic voltage regulator and interface IC, assembled specifically designed to provide the power and the 13/18V, 22KHz tone signalling to the LNB down converter in the antenna or to the multiswitch box ...
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... LNBP21 power dissipation together with simple design and standard interfacing. This IC has a built in DC/DC step-up controller that, from a single supply source ranging from 8 to 15V, generates the voltages that let the linear post-regulator to work at a minimum dissipated power. An UnderVoltage Lockout circuit will disable the whole circuit when the supplied V drops below a fixed threshold (6 ...
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... Table 3: Thermal Data Symbol R Thermal Resistance Junction-case thj-case Figure 2: Pin Configuration (top view) SO-20 SO-20 (Tape & Reel) LNBP21D2-TR Parameter Parameter LNBP21 PowerSO-20 PowerSO-20 (Tube) (Tape & Reel) LNBP21PD LNBP21PD-TR Value Internally Limited -0 -0 900 ±20 ±400 -0 -0 -40 to +150 ...
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... C bus. When the TEN bit of the System Register is LOW, this pin will accept the DiSEqC code from the main controller. The LNBP21 will use this code to modulate the internally generated 22kHz carrier. Set to GND this pin if not used. 22kHz Tone Detector Input. Must be AC coupled to the DiSEqC bus ...
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... CC threshold (6.7V typ.). TRANSMISSION WITHOUT ACKNOWLEDGE Avoiding to detect the acknowledge of the LNBP21, the µP can use a simpler transmission: simply it waits one clock without checking the slave acknowledging, and sends the new data. This approach of course is less protected from misworking and decreases the noise immunity. ...
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... LNBP21 Figure 4: Data Validity On The I Figure 5: Timing Diagram On I Figure 6: Acknowledge BUS 2 C Bus 2 C Bus ...
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... Values are typical unless otherwise specified 2 RECEIVED DATA (I C bus READ MODE) The LNBP21 can provide to the Master a copy of the SYSTEM REGISTER information via I in read mode. The read mode is Master activated by sending the chip address with R/W bit set the following master generated clocks bits, the LNBP21 issues a byte on the SDA data bus line (MSB transmitted first) ...
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... OUT OMAX PWK data in accordance to the DiSEqC protocol. Full compliance of the system to the specification is thus not implied by the bare use of the LNBP21. The system designer should also take in consideration the bus hardware requirements, that include the source impedance of the Master Transmitter measured at 22KHz. To limit the ...
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... VSEL=1 5 ISEL=1 400 ISEL=0 500 ISEL=1 200 ISEL=0 300 900 t /10 OFF 20 22 0.55 0. 260 V =12 or 0.35 MI 220 18 0.2 150 0 LNBP21 Max. Unit 18 13 200 mV 550 mA 650 KHz 0.9 Vpp ...
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... LNBP21 Symbol Parameter I Output Backward Current OBK T Temperature Shutdown SHDN Threshold T Temperature Shutdown SHDN Hysteresis Table 6: Gate And Sense Electrical Characteristics (T Symbol Parameter R Gate LOW R DSON-L DSON R Gate LOW R DSON-H DSON V Current Limit Sense Voltage SENSE 2 Table Electrical Characteristics (T Symbol ...
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... EXTM SDA SCL DETIN DSQIN 470nF DSQOUT BYP ADDRESS Figure 9: Output Voltage vs Temperature MI, A LT1 10nF Scope Probe LT2 , I I OBK O Load 10nF OUT 20µF V EXTM, 10nF 25°C) j LNBP21 V OBK V DETIN / I OL 11/24 ...
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... LNBP21 Figure 10: Line Regulation vs Temperature Figure 11: Line Regulation vs Temperature Figure 12: Load Regulation vs Temperature 12/24 Figure 13: Load Regulation vs Temperature Figure 14: Supply Current vs Temperature Figure 15: Supply Current vs Temperature ...
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... Figure 16: Dynamic Overload Protection ON Time vs Temperature Figure 17: Dynamic Overload Protection OFF Time vs Temperature Figure 18: Output Current Limiting vs Temperature Figure 19: Output Current Limiting vs Temperature Figure 20: Tone Frequency vs Temperature Figure 21: Tone Amplitude vs Temperature LNBP21 13/24 ...
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... LNBP21 Figure 22: Tone Duty Cycle vs Temperature Figure 23: Tone Rise Time vs Temperature Figure 24: Tone Fall Time vs Temperature 14/24 Figure 25: Loopthrought Switch Drop Voltage vs Temperature Figure 26: Loopthrought Switch Drop Voltage vs Temperature Figure 27: Loopthrought Switch Drop Voltage vs Loopthrought Current ...
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... Figure 28: Loopthrought Switch Drop Voltage vs Loopthrought Current Figure 29: DSQOUT Pin Logic Low vs Temperature Figure 30: Undervoltage Lockout Threshold vs Temperature Figure 31: Output Backward Current vs Temperature Figure 32: DC/DC Converter Efficiency vs Temperature Figure 33: Current Limit Sense vs Temperature LNBP21 15/24 ...
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... LNBP21 Figure 34: 22kHz Tone V =12V, I =50mA, EN=TEN Figure 35: DSQIN Tone Enable Transient Response V =12V, I =50mA, EN=1, TEN Figure 36: DSQIN Tone Enable Transient Response V =12V, I =50mA, EN=1, TEN 16/24 Figure 37: DSQIN Tone Disable Transient Response V =12V, I =50mA, EN=1, TEN Figure 38: Output Voltage Transient Response ...
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... GND below the IC body, the PowerSO-20 package has a Rthj-c much lower than the SO-20, only 2°C/ result, much lower copper area must be provided to dissipate the same power and 2 minimum of 12cm figure 41. LNBP21 layouts are possible, too. 2 copper area is enough, see Basic ...
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... LNBP21 Figure 41: PowerSO-20 Suggested PCB Heatsink Layout 18/24 ...
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... MIN. A 2.35 A1 0.1 B 0.33 C 0.23 D 12. 10.00 h 0.25 L 0.4 k 0° ddd mm. TYP MAX. 2.65 0.093 0.30 0.004 0.51 0.013 0.32 0.009 13.00 0.496 7.6 0.291 1.27 10.65 0.394 0.75 0.010 1.27 0.016 8° 0.100 inch MIN. TYP. 0.050 0° 0016022D LNBP21 MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.419 0.030 0.050 8° 0.004 19/24 ...
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... LNBP21 DIM. MIN 0. 0.40 c 0.23 D (1) 15.80 E 13. (1) 10. 0. 0˚ T (1) “D and E1” do not include mold flash or protusions - Mold flash or protusions shall not exceed 0.15mm (0.006” DETAIL 45˚ 20/24 PowerSO-20 MECHANICAL DATA mm ...
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... Tape & Reel SO-20 MECHANICAL DATA DIM. MIN 12 10.8 Bo 13.2 Ko 3.1 Po 3.9 P 11.9 mm. TYP MAX. 330 13.2 0.504 0.795 2.362 30.4 11 0.425 13.4 0.520 3.3 0.122 4.1 0.153 12.1 0.468 inch MIN. TYP. MAX. 12.992 0.519 1.197 0.433 0.528 0.130 0.161 0.476 LNBP21 21/24 ...
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... LNBP21 Tape & Reel PowerSO-20 MECHANICAL DATA DIM. MIN 12 15.1 Bo 16.5 Ko 3.8 Po 3.9 P 23.9 W 23.7 22/24 mm. TYP MAX. 330 13.2 0.504 0.795 2.362 30.4 15.3 0.594 16.7 0.650 4.0 0.149 4.1 0.153 24.1 0.941 24.3 0.933 inch MIN. TYP. MAX. 12.992 0.519 1.197 0.602 0.658 0.157 0.161 0.949 0.957 ...
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... Table 9: Revision History Date Revision 07-Jul-2004 2 05-Oct-2004 3 Description of Changes Typing error on text. Mistake Pin 6 Power SO-20 - Table 4. LNBP21 23/24 ...
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... LNBP21 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 ...