A8281SLB

Series: -
Number of Outputs: 1
Mounting Type: Surface Mount
Packaging: Tube
Operating Temperature: -20°C ~ 85°C
Manufacturer: Allegro Microsystems Inc
Applications: Converter, Analog and Digital Satellite Receivers
Voltage - Output: 13V, 18V
Package / Case: 16-SOIC (0.295", 7.50mm Width)
Supplier Device Package: 16-SOIC W
Voltage - Input: 17.5 V ~ 48 V


Features:

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
Reverse-current protection
Cable length compensation (A8282SLB only)


Pinout




Specifications

Supply Voltage, V_IN ................................ 47-V
Output Current, I_LNB .......... Internally Limited
Output Voltage Range, V_LNB .... -1-V to +22-V
Logic Input Voltage Range,
V_I ............................................ -0.3-V to +7-V
Flag Output Voltage, V_OLF ....................... 7-V
Operating Temperature Range,
T_A ...................................... -20°C to +85°C
Junction Temperature, T_J ................ +150°C
Storage Temperature Range,
T_S .................................... -55°C to +150°C


Description

Intended for analog and digital satellite receivers, these low-noise block converter regulators (LNBRs) A8281SLB are monolithic linear and switching voltage regulators specifically designed to provide the power and interface signals to the LNB down converter via the coaxial cable. If the device is in standby mode (EN terminal low), the regulator output is disabled, allowing the antenna down converters to be supplied or controlled by other satellite receivers sharing the same coaxial cable. In this mode, the device will limit the output reverse current.

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.

Parameters:

Technical/Catalog Information	A8281SLB
Vendor	Allegro Microsystems Inc
Category	Integrated Circuits (ICs)
Package / Case	16-SOIC
Packaging	Tube
Type	LNB (Low Noise Block) Voltage Regulator
Voltage - Input	17.5 ~ 48 V
Voltage - Output	13V, 18V
Number of Outputs	1
Applications	Converter, Analog and Digital Satellite Receivers
Operating Temperature	-20°C ~ 85°C
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	A8281SLB A8281SLB