lnbeh21 STMicroelectronics, lnbeh21 Datasheet
lnbeh21
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lnbeh21 Summary of contents
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... The LNBEH21 supports both methods of communication currently used, 13/18V Control Word Communication Mode and DiSEqC communication. In this application field, it offers a complete solution with extremely low component ...
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... Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 3: Thermal Data Symbol R Thermal Resistance Junction-case thj-case Figure 1: Pin Configuration (top view) 2/22 PowerSO-20 (Tube) LNBEH21PD Parameter Parameter PowerSO-20 (Tape & Reel) LNBEH21PD-TR Value Unit -0 - Internally Limited ...
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... Set high or floating for I 750mA, connect to ground for I O Output of the linear post-regulator/modulator to the LNB. See truth tables for voltage selections. 2 Four I C bus addresses available by setting the Address Pin level voltage. See address pin characteristics table. LNBEH21 TX. Needs DC decoupling to the O 450mA. O 3/22 ...
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... SDA SDA 13 13 SCL SCL TEN/VSEL TEN/VSEL 14 14 GND GND D2 1N4001 IC1 ISEL Vup C3(***) C9 470nF VoTX Ceramic Gate VoRX LNBEH21 Sense (**) DETIN Vcc C4 (***) 470nF Ceramic { SDA EXTM Bus SCL ADDRESS DSQOUT TEN/VSEL GND GND R1 R1 3.3K 3. ISEL ISEL ...
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... I C BUS INTERFACE Data transmission from main µP to the LNBEH21 and vice versa takes place through the 2 wires I interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be externally connected). ) that let the linear post-regulator to work at a minimum dissipated power ...
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... CC TRANSMISSION WITHOUT ACKNOWLEDGE Avoiding to detect the acknowledge of the LNBEH21, 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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... Figure 6: Acknowledge On I LNBEH21 SOFTWARE DESCRIPTION INTERFACE PROTOCOL The interface protocol comprises start condition ( chip address byte = hex (the LSB bit determines read(=1)/write(=0) transmission sequence of data (1 byte + acknowledge stop condition (P) CHIP ADDRESS MSB ACK= Acknowledge Start Stop; R/W = Read/Write ...
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... The LNBEH21 can provide to the Master a copy of the SYSTEM REGISTER information via I 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 LNBEH21 issues a byte on the SDA data bus line (MSB transmitted first). ...
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... AC coupled to the DiSEqC TM bus and the extracted PWK data are available on the DSQOUT pin biased with a pull-up resistor to a fixed voltage (see Fig. 7 and 8). Full compliance of the system to the specification is not implied by the bare use of the LNBEH21; the system designer should also take in consideration that, to comply to the bi-directional DiSEqC TM 2.0 bus hardware requirements, an output R-L filter is needed ...
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... LNBEH21 Figure 7: DETIN/DSQOUT Circuit LNBEH21 DETIN Tone Detector DSQOUT R1 2.5K 13/18V Control Word mode, OM=1 When OM=1 the VOM is used to force the DC/DC Converter output voltage (V control the TEN/VSEL pin function. According to the VOM selection TEN/VSEL will absolve two different functions: 1)VOM=0 - TEN/VSEL pin controls both the post regulator output voltage (V ...
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... When TTX = 1 the device is set in receiving mode, the RX output is partially OFF the ON Pulsed (dynamic) current limiting is selected Static current limiting is selected Power blocks disabled LNBEH21 Function = 15. 21 16. 22 Function ) UP = 13.25 V and V = 15. 19.5V and ...
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... LNBEH21 Table 5: Electrical Characteristics T Disabled, TTX=0/1, ISEL=High section for I C access to the system register. Symbol Parameter V Supply Voltage I I Supply Current I V Output Voltage O V Output Voltage O V Line Regulation O V Load Regulation O 13/18V 13/18V Rise and Fall transition Time (to be ...
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... GATE = 0 to 85° 12V Test Conditions SDA, SCL SDA, SCL SDA, SCL 0.4 to 4.5V I SDA (open drain 6mA 85°C, V =12V Test Conditions LNBEH21 Min. Typ. Max. Unit -6 -15 mA 150 °C 15 °C = 12V) I Min. Typ. Max. Unit 4.5 4.5 200 mV Min ...
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... LNBEH21 THERMAL DESIGN NOTES During normal operation, this device dissipates some power. The power dissipation depends on the selected communication mode (DiSEqC or 13/18 control word communication). When the device is used in DiSEqC mode, at maximum rated output current (750mA), the voltage drop on the linear regulator lead to a total dissipated power that is about 1.65W. ...
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... TYPICAL CHARACTERISTICS (unless otherwise specified T Figure 10: Output Voltage vs Temperature Figure 11: Output Voltage vs Temperature Figure 12: Load Regulation vs Temperature = 25°C) j Figure 13: Supply Current vs Temperature Figure 14: Supply Current vs Temperature Figure 15: Supply Current vs Temperature LNBEH21 15/22 ...
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... LNBEH21 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 16/22 Figure 19: Output Current Limiting vs Temperature Figure 20: Tone Frequency vs Temperature Figure 21: Tone Amplitude vs Temperature ...
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... Figure 22: Tone Duty Cycle vs Temperature Figure 23: Tone Rise Time vs Temperature Figure 24: Tone Fall Time vs Temperature Figure 25: Undervoltage Lockout Threshold vs Temperature Figure 26: Output Backward Current vs Temperature Figure 27: DC/DC Converter Efficiency vs Temperature LNBEH21 17/22 ...
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... LNBEH21 Figure 28: Current Limit Sense Voltage vs Temperature Figure 29: 22kHz Tone Waveform V =12V, I =50mA, EN=TEN Figure 30: TEN/VSEL Tone Enable Transient Response V =12V, I =50mA, EN=1, Tone enabled by DSQIN Pin CC O 18/22 Figure 31: TEN/VSEL Tone Enable Transient Response V =12V, I =50mA, EN=1, OM Figure 32: TEN/VSEL Tone Disable Transient ...
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... DETAIL A lea d slug a3 DETAIL B 0.35 Gage Plan SEATI NG PLANE (COPLANARITY) 0056635 LNBEH21 MAX. 0.1417 0.0118 0.1299 0.0039 0.0209 0.0013 0.630 0.5710 0.4370 0.1141 0.0039 0.0433 0.0433 10˚ 8˚ 19/22 ...
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... LNBEH21 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 20/22 mm. TYP MAX. MIN. 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 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 05-Jul-2004 1 Description of Changes First Release. LNBEH21 21/22 ...
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... LNBEH21 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 ...