A8287SLBTR

A8287SLBTR Datasheet

A8285 and A8287 LNB Supply and Control Voltage Regulator

Part	Datasheet
A8287SLBTR	A8287SLBTR (pdf)

Related Parts	Information
A8287SLBTR-T	A8287SLBTR-T
A8285SLBTR-T	A8285SLBTR-T
A8287SLB	A8287SLB
A8285SLBTR	A8285SLBTR
A8285SLB	A8285SLB

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

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

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A8287SLBTR Datasheet file may be downloaded here without warranties.

Datasheet ID: A8287SLBTR 516066