LNB
MP8125

MP8125

8-14V, 550mA, LNB Power Supply and Control Voltage Regulator

Datasheet

Description

The MP8125 is a voltage regulator designed to provide efficient, low noise power to the Satellite receiver’s RF LNB (Low Noise Block) converter via coaxial cable through a DiSEqC 1.x compatible link that receives instructions from a dedicated controller. The MP8125 integrates a current mode boost regulator followed by a tracking linear regulator. The boost regulator provides a clean and quiet power source that will not contaminate the low noise RF signal down converted to the receiver. The tracking linear regulator protects the output against overload or short. The MP8125 provides a number of features described in the European EUTELSAT specification (DiSEqC) including: voltage selection of horizontal or vertical polarization directions of LNB and a selectable VOUT compensation for voltage drop on the long coaxial cable. In accordance with DiSEqC standard, a tone signal of 22kHz is generated by an internal oscillator and can be activated or deactivated onto output by EXTM pin.

Features & Benefits

DiSEqC 1.x Compatibility
Up to 550mA Output Current
8V to 14V Input Voltage
Boost Converter with Internal Switch
Low Noise LDO Output
Built-in 22kHz Tone Signal Generator
Programmable Current Limit
1V Line Drop Compensation
Adjustable Soft-start Time
POK Indicator
Short Circuit Protection
Over Temperature Protection
TSSOP16 Exposed Pad and 24-pin QFN (4 x 4mm) Packages

Active Part Numbers:

MP8125EF-LF-P MP8125EF-LF-P MP8125EF-LF-Z

Evaluation Tools

5EV8125EF-00A Evaluation Kit 50mA, 8-14V Input, LNB Power Supply and Control Voltage Regulator Evaluation Board

The EV8125EF-00A is an evaluation board for MP8125, which is LNB power supply and control voltage regulator. The board provides efficient, low noise power to the Satellite receiver’s RF LNB (Low Noise Block) converter.

The board accepts the supply voltage from 8V to 14V and the load current can be up to 550mA. The current limit can be adjustable with an external resistor.

The board provides a number of features described in the European EUTELSAT specification (DiSEqC) including: voltage selection of horizontal or vertical polarization directions of LNB and a selectable VOUT compensation for voltage drop on the long coaxial cable. In accordance with DiSEqC standard, a tone signal of 22kHz is generated by an internal oscillator and can be activated or deactivated onto output by EXTM pin.

$25.00
+ tax

Design Resources

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