A8282SLB
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A8281SLB (pdf) |
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A8282SLBTR-T |
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A8282SLB |
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A8281SLBTR |
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A8282SLBTR |
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Data Sheet 27448.2E 8281 AND 8282 A8282SLB NC 1 OLF 2 VBULK 3 NC 4 NC 5 GND 6 GND 7 SENSE 8 LNB 99 LX 10 VIN 11 TCAP 12 BUCK REG. VOLTAGE CONTROL CHARGE PUMP 24 EXTM 23 VINT 22 PUMPX 21 VPUMP 20 CPUMP 19 GND 18 GND 17 ENT 16 EN 15 VSEL0 14 VSEL1 13 LLC Dwg. PP-072-2 ABSOLUTE MAXIMUM RATINGS at TA = +25°C Supply Voltage, VIN 47-V Output Current, ILNB Internally Limited Output Voltage Range, VLNB -1-V to +22-V Logic Input Voltage Range, VI -0.3-V to +7-V Flag Output Voltage, VOLF 7-V Operating Temperature Range, TA -20°C to +85°C Junction Temperature, TJ +150°C Storage Temperature Range, TS -55°C to +150°C LNB SUPPLY AND CONTROL-VOLTAGE REGULATORS The A8281SLB output is set to 13 or 18-V by the VSEL terminal. It is supplied in a 16-lead SOIC package with internally-fused leads for enhanced thermal dissipation. The fused leads are at ground potential and need no electrical isolation. The A8282SLB output is set to 12, 13, 18, or 20-V by the VSEL terminals. Additionally, it is possible to increase the selected voltage by 1-V to compensate for the voltage drop in the coaxial cable LLC terminal high . It is supplied in a 24-lead SOIC package with internallyfused leads for enhanced thermal dissipation. The fused leads are at ground potential and need no electrical isolation The A8282SLB is an improved version of the A8283SLB, without a bypass switch.The lead Pb free version has 100 % matte tin leadframe plating. • LNB selection and standby function • Built-in tone oscillator factory trimmed to 22-kHz, facilitates DiSEqC a trademark of EUTELSAT encoding • Tracking switch-mode power converter for lowest dissipation • Externally adjustable short-circuit protection • LNB short-circuit protection and diagnostics • Auxiliary modulation input • Internal over-temperature protection • Cable length compensation A8282SLB only These devices incorporate features that have patents pending. Always order by the following complete part number. Part Number Pb-Free Package Packing* A8281SLBTR 16-pin SOICW 1000 pieces/13-in. reel A8282SLBTR 24-pin SOICW 1000 pieces/13-in. reel A8282SLBTR-T Yes 24-pin SOICW 1000 pieces/13-in. reel *Contact Allegro for additional packing options. 8281 AND 8282 LNB SUPPLY AND CONTROL-VOLTAGE REGULATORS FUNCTIONAL BLOCK DIAGRAM and typical application 47 V MAX 100 µF 100 µH + 100 µF |
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