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MP8126 PDF 데이터시트 ( Data , Function )

부품번호 MP8126 기능
기능 LNB-Power Supply and Control-Voltage Regulator
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MP8126 데이터시트, 핀배열, 회로
MP8126
550mA, 8V-to-14V Input, LNB-Power Supply
and Control-Voltage Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP8126 is a voltage regulator designed to
provide efficient, low-noise power to a satellite
receiver’s RF LNB (Low Noise Block) converter.
It connects using a coaxial cable through a link
that is compatible with the European
EUTELSAT specification (DiSEqC) 1.x that
receives instructions from a dedicated controller.
The MP8126 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 as it is down-converted to the
receiver. The tracking linear regulator protects
the output against overloads or shorts.
The MP8126 provides a number of features
described in the DiSEqC, including voltage
selection of horizontal or vertical LNB
polarization directions, and selectable VOUT
compensation for substantial voltage drops on
long coaxial cable. In accordance with DiSEqC,
the part can detect a 22kHz signal and output a
shaped signal.
The MP8126 is available in a thermally-
enhanced TSSOP16EP and 24-pin QFN
(4X4mm) packages.
FEATURES
DiSEqC 1.x Compatibility
Up to 550mA Output Current
Programmable Current Limit
8V-to-14V Input Voltage
Boost Converter with Internal Switch
Low-Noise LDO Output
Built-In 22kHz Signal Shaper
1V Line-Drop Compensator
Adjustable Soft-Start Time
POK Indicator
Short-Circuit Protection
Over-Temperature Protection
TSSOP16 Exposed Pad and 24-pin QFN
(4X4mm) Packages
APPLICATIONS
LNB Power Supply and Control for Satellite
Set Top Boxes
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit the MPS website under Products, Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP8126 Rev. 1.03
www.MonolithicPower.com
3/28/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
1




MP8126 pdf, 반도체, 판매, 대치품
MP8126 – LNB POWER SUPPLY AND CONTROL VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameter
Symbol Condition
Min Typ Max Units
TONE Signal
EXTM Input Logic Threshold VEXTM_High VEXTM rising
VEXTM_Low VEXTM falling
0.8
EXTM Frequency Range (7)
VEXTM_High=3.3V, VEXTM_Low=0V 20 22
Peak-to-Peak Amplitude
VPP IOUT = 0 to 100mA
0.4 0.6
Duty Cycle
RL=1k, CL=0.1μF
50
Rise and Fall Time
RL=1k, CL=0.1μF
8
2V
V
24 kHz
0.8 V
%
μs
Over-Current Protection
Output Current Limit
Dynamic Overload-
Protection Off Time
ILIMIT RLIMIT=10k
600 770 1100 mA
τOFF Time between restart attempts
2
s
Dynamic Overload-
Protection On Time
τON Time to onset of shutdown
50 ms
POK
POK Upper-Trip Threshold
(5)
VFB with respect to nominal
12 %
POK Lower-Trip Threshold
POK Output Lower Voltage
Thermal Protection
Over-Temperature
Shutdown (5)
Over-Temperature
Protection Hysteresis
VFB with respect to nominal
ISINK = 5mA
-12 %
0.3 V
150 °C
20 °C
Notes:
5) Guaranteed by design.
6) Shall withstand the back voltage for an indefinite period of time. On removal of the fault condition the device returns to normal operation
7) This range is used to guarantee EXTM function.
MP8126 Rev. 1.03
www.MonolithicPower.com
3/28/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
4

4페이지










MP8126 전자부품, 판매, 대치품
MP8126 – LNB POWER SUPPLY AND CONTROL VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Performance waveforms are tested on the evaluation board of the DESIGN EXAMPLE section.
VIN =12V, VLINEDROP=5V, VEXTM=0V, IOUT=0.55A, TA = +25ºC, unless otherwise noted.
EN Startup
EN Shutdown
13V to 18V Switch
VOUT
10V/div.
VBOOST
20V/div.
VEN
5V/div.
IOUT
500mA/div.
2μ s/div.
VOUT
10V/div.
VBOOST
20V/div.
VEN
5V/div.
IOUT
500mA/div.
18V to 13V Switch
VOUT
10V/div.
VBOOST
10V/div.
VSW
20V/div.
V13V/18V
5V/div.
1μ s/div.
VOUT
10V/div.
VBOOST
10V/div.
VSW
20V/div.
IOUT
500mA/div.
Output Ripple
Vin=12V, Vo=19V,Io=0.55A
VOUT(AC)
20mV/div.
VBOOST(AC)
100mV/div.
VSW
20V/div.
IOUT
500mA/div.
VOUT
10V/div.
VBOOST
10V/div.
VSW
20V/div.
V13V/18V
5V/div.
1μ s/div.
200μ s/div.
22kHz Tone Signal
Vin=12V, Vo=19V,Io=0.1A
VOUT(AC)
200mV/div.
VBOOST(AC)
20mV/div.
VEXTM
5V/div.
IOUT
200mA/div.
MP8126 Rev. 1.03
www.MonolithicPower.com
3/28/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
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