LNBH23L STMicroelectronics, LNBH23L Datasheet
LNBH23L
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LNBH23L Summary of contents
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... LNBH23LQTR November 2010 Description Intended for analog and digital satellite receivers, the LNBH23L is a monolithic voltage regulator and interface IC, assembled in QFN32 specifically designed to provide the power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dish or to the multi-switch box ...
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... I²C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.2 Start and stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.5 Transmission without acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 LNBH23L software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.2 System register (SR, 1 byte 7.3 Transmitted data (I²C bus write mode 7.4 Diagnostic received data (I²C read mode 2/25 Doc ID 15335 Rev 4 LNBH23L ...
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... LNBH23L 7.5 Power-on I²C interface reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.6 Address pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.7 DiSEqC™ implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Doc ID 15335 Rev 4 Contents 3/25 ...
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... I²C OLF and OTF FB FB 22kHz 22kHz Oscill . Oscill . . . . . . . . . . . LNBH23L LNBH23L A-GND A-GND Doc ID 15335 Rev 4 SDA SCL SDA SCL V V Byp Byp CC-L CC-L Preregulator Preregulator + + + + +U.V.lockout +U.V.lockout + + +P.ON reset +P.ON reset EN EN Diagnostics Diagnostics Pull Down Pull Down Controller Controller LNBH23L PDC PDC ...
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... LNBH23L 2 Application information This IC has a built-in DC-DC step-up converter that, from a single source from generates the voltages (V dissipated power of 0.55 W typ. @ 500 mA load (the linear post-regulator drop voltage is internally kept at V whole circuit when the supplied V Note: In this document the V output (V pin) ...
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... LLC I²C bit that increases the selected voltage value to compensate possible voltage drop along the output line. The LNBH23L is also compliant to the USA LNB power supply standards. In stand-by condition (EN bit LOW) all the I²C bits and the TTX pin must be set LOW (if the TTX pin is not used it can be left floating or to GND but the TTX bit must be set LOW during the stand-by condition) ...
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... Thermal protection and diagnostic The LNBH23L is also protected against overheating: when the junction temperature exceeds 150 °C (typ.), the step-up converter and the liner regulator are shut-off, and the diagnostic OTF SR bit is set to "1". Normal operation is resumed and the OTF bit is reset to LOW when the junction is cooled down to 135 ° ...
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... Clock from I²C bus. This pin will accept the DiSEqC code from the main µController. DiSEqC input The LNBH23L will use this code to modulate the internally generated 22 kHz carrier. Set to ground if not used. This pin can be used, as well as the TTX I²C bit of the system ...
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... LNBH23L Table 2. Pin description (continued) Pin n° Symbol Epad Epad 20 A-GND Analog ground 15 BYP By-pass capacitor 10 ADDR Address setting 28 ISEL Current selection 30 Reserved 16, 17, 23, N.C. 24, 25, 26, 31, 32 Name To be connected with power grounds and to the ground layer Exposed pad through vias to dissipate the heat ...
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... Table 4. Thermal data Symbol R Thermal resistance junction-case thJC Thermal resistance junction-ambient with device soldered R thJA on 2s2p PC board 10/25 (1) Parameter (2) Parameter Doc ID 15335 Rev 4 LNBH23L Value Unit -0 -0 Internally limited ...
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... Byp Byp P-GND P-GND P-GND A-GND A-GND A-GND Vup Vup VoTX VoTX 470nF 470nF EXTM EXTM LNBH23L LNBH23L VoRX VoRX LX LX Vcc Vcc Vcc-L Vcc-L PDC PDC 220nF 220nF 220nF { { SDA SDA Bus C Bus ...
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... DSQIN ISEL ISEL ISEL ISEL ISEL ISEL R2 (RSEL) R2 (RSEL) 15kOhm 15kOhm Byp Byp C11 C11 C11 C11 220nF 220nF 220nF 220nF Notes > and I higher than: RRM F(AV) > 0 > F(AV) RRM pin is the boost converter peak current (see PEAK LNBH23L < 0 ...
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... LNBH23L To calculate the boost converter peak current (I Equation L1, use the following formula: PEAK Doc ID 15335 Rev 4 Typical application circuit 13/25 ...
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... SDA line remains at the HIGH level during the ninth clock pulse time. In this case the master transmitter can generate the STOP information in order to abort the transfer. The LNBH23L won't generate acknowledge if the V 6 ...
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... LNBH23L Figure 6. Data validity on the I²C bus Figure 7. Timing diagram of I²C bus Figure 8. Acknowledge on the I²C bus Doc ID 15335 Rev 4 I²C bus interface 15/25 ...
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... Transmitted data (I²C bus write mode) When the R/W bit in the chip address is set to 0, the main microprocessor can write on the system register (SR) of the LNBH23L via I²C bus. 6 bits are available and can be written by the microprocessor to control the device functions as per the below truth table ...
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... I²C bus 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, LNBH23L issues a byte on the SDA data bus line (MSB transmitted first). At the ninth clock bit the Master can: ● ...
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... DiSEqC™ implementation LNBH23L helps system designer to implement DiSEqC 1.x protocol by allowing an easy PWK modulation of the 22 kHz carrier through the EXTM and V the system to the specification is thus not implied by the bare use of the LNBH23L (see Figure 3, Figure 4 18/25 ...
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... LNBH23L 8 Electrical characteristics Refer to the typical application circuits, T VSEL=LLC=TEN=PCL=TEST4=TEST5=TTX= mA, unless otherwise stated. Typical values are referred to T OUT V pin voltage. See software description section for I²C access to the system register. oRX Table 8. Electrical characteristics Symbol Parameter V Supply voltage IN I Supply current ...
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... SDA (open drain 6mA OL SCL (1) Test condition R/W bit determines the transmission mode: read (R/W=1) write (R/W=0) R/W bit determines the transmission mode: read (R/W=1) write (R/W=0) R/W bit determines the transmission mode: read (R/W=1) write (R/W=0) Doc ID 15335 Rev 4 LNBH23L Min. Typ. Max. Unit 400 mV PP 2.0 kΩ 220 kHz ...
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... LNBH23L 9 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Doc ID 15335 Rev 4 Package mechanical data ® ...
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... Package mechanical data Table 11. QFN32 ( mm) mechanical data Dim ddd Figure 9. QFN32 package dimensions 22/25 (mm.) Min. Typ. 0.80 0.90 0 0.02 0.20 0.18 0.25 4.85 5.00 3.20 4.85 5.00 3.20 0.50 0.30 0.40 Doc ID 15335 Rev 4 LNBH23L Max. 1.00 0.05 0.30 5.15 3.70 5.15 3.70 0.50 0.08 7376875/E ...
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... LNBH23L Tape & reel QFNxx/DFNxx (5x5 mm.) mechanical data Dim. Min 12 mm. Typ. Max. Min. 330 13.2 0.504 0.795 101 3.898 14.4 5.25 5.25 1 Doc ID 15335 Rev 4 Package mechanical data inch. Typ. Max. 12.992 0.519 3.976 0.567 0.207 0.207 0.043 ...
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... Initial release. Modified: Figure 3 on page 11, Figure 4 on page 11 Added: Z Table 8 on page 19. EXTM Modified condition Table 8 on page 19 IN TONE Modified Table 10 on page 20. Doc ID 15335 Rev 4 Changes and Figure 5 on page and Figure 5 on page LNBH23L 12. 12. ...
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... LNBH23L Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...