A8287SLB

A8287SLB Datasheet


A8285 and A8287 LNB Supply and Control Voltage Regulator

Part Datasheet
A8287SLB A8287SLB A8287SLB (pdf)
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PDF Datasheet Preview
A8285 and A8287 LNB Supply and Control Voltage Regulator
• LNB selection and standby function
• Provides up to 500 mA load current
• Two-wire serial I2C interface
• Built-in tone oscillator, factory-trimmed to 22 kHz;
facilitates DiSEqC encoding
• Auxiliary modulation input
• 22 kHz tone detector facilitates DiSEqC decoding

A8287 only
• Tracking switch-mode power converter for lowest
dissipation
• LNB overcurrent protection and diagnostics
• Internal overtemperature protection
• LNB voltages 16 possible levels compatible with all
common standards

Packages
16-pin SOIC A8285
24-pin SOIC A8287

Intended for analog and digital satellite receivers, the LNB low noise block converter regulator is a monolithic linear and switching voltage regulator, specifically designed to provide power and interface signals to an LNB downconverter, via coaxial cable.

The device uses a 2-wire bidirectional serial interface, compatible with the I2C Inter-C bus standard, that operates up to 400 kHz.

The A8285 is supplied in a 16-lead plastic power SOIC with internally fused leads for thermal dissipation. The A8287 is supplied in a 24-lead plastic power SOIC with internally fused leads. Both devices are also available in lead Pb free versions, with 100% matte tine leadframe plating.

V IN C10 100 nF

Functional Block Diagram

C1 33 µF

L1 33 µH
100 nF
100 nF 100 µF

VREG C3 220 nF

EXTM R3 R4 R5 VDD

SDA SCL ADD

Internal Regulator

BOOST Feedback

OSC In Boost Converter

Charge Pump

VPUMP

Overcurrent

BOOST

Clock Divider
22 kHz Tone Generator

Output Voltage Select

Fault Monitor Overcurrent

TSD Undervoltage

Overcurrent
100 mV

DISABLE

Tracking Regulator
22 kHz Tone Detector

R1 15 Ω

LNB D2

L2 33 µH
More datasheets: 4206-016LF | 26800B-449 | CY7C1049BL-25VC | CY7C1049B-15VC | CY7C1049B-20VC | CY7C1049BL-17VC | CY7C1049B-17VC | A8287SLBTR-T | A8285SLBTR-T | A8287SLBTR


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Datasheet ID: A8287SLB 516066