Wire Gauge
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Stud / Tab Size
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Insulation
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Product
: Tab Terminals
Features: Complete Interface for Two LNBs Remote Supply and Control
LNB Selection and Stand-By Function
T FBuilt-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates DiSEqC(TM) (a trademark of EUTELSAT) Encoding
Full Modulation With No Load
Tracking Switch-Mode Power Converter for Lowest Dissipation
Externally Adjustable Short-Circuit Protection
LNB Short-Circuit Protection and Diagnostics
Auxiliary Modulation Input
Cable Length Compensation
Internal Over-Temperature ProtectionPinout
SpecificationsSupply Voltage, VIN .......................... 47 V
Output Current, IO . . . Internally Limited
Logic Input Voltage Range,
VI................................... -0.5 V to +7 V
Operating Temperature Range.
T A. . . . . . . . . . . . . .. . -20to +85
Storage Temperature Range,
TS . . . . . . . . . . . . . ... -40 to +150
* Output current rating is limited by inputDISCONT voltage, duty cycle, and ambient tempera-ture. Under any set of conditions, do not exceed a junction temperature of +150°C
+ Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These condi- tions can be tolerated but should be avoided.v
DescriptionA8284SB is intended for analog and digital satellite receivers, the low noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator designed to provide power and interface signals to the LNB downconverter via the coaxial cable. Because most satellite receivers have two antenna ports, the output voltage of the regulator is available at one of two logic-selectable output terminals (LNBA, LNBB). If the A8284SB is in stand-by mode (EN terminal LOW), both regulator outputs are disabled, allowing the antenna downconverters to be supplied and controlled by other satellite receivers sharing the same coaxial cable. Similar single-output devices, with a bypass function for slave operation in single-dish dual-receiver systems, are the A8283SB/SLB.
The regulator outputs are set to 12, 13, 18, or 20 V by the VSEL terminals.Additionally, A8284SB is possible to increase the selected voltage by 1 V to compen-sate for the voltage drop in the coaxial cable (LLC terminal HIGH).
The LNBR combines a tracking switching regulator and low-noise linear regulators. Logic inputs (VSEL0, VSEL1, and LLC) select the desired output voltage. A tracking current-mode buck converter provides the linear regulator input voltage that is set to the output voltage plus typically 0.8 V. This maintains constant voltage drop across the linear regulators while permitting adequate voltage range for tone injection.
The A8284SB is supplied in a 24-pin plastic DIP with batwing tabs (A8284SB), or a 24-lead SOIC power-tab package (A8284SLB). In both cases, the power tab is at ground potential and needs no electrical isolation.
Parameters: | Technical/Catalog Information | 8284 |
| Vendor | Keystone Electronics |
| Category | Connectors |
| Color | - |
| Features | - |
| Gender | Male |
| Insulation | Non-Insulated |
| Length - Overall | 0.730" (18.54mm) |
| Mounting Type | Free Hanging (In-Line) |
| Packaging | Bulk |
| Tab Thickness | 0.032" (0.81mm) |
| Tab Width | 0.250" (6.35mm) |
| Tab Length | - |
| Terminal Type | Standard |
| Termination | Crimp |
| Wire Gauge | 14-16 AWG |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | 8284
8284
8284K ND
8284KND
8284K
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8284 Data Sheet
