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PDF L8200 Data sheet ( Hoja de datos )

Número de pieza L8200
Descripción CONTROL AND POWER MANAGEMENT SOLUTION
Fabricantes Unisonic Technologies 
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No Preview Available ! L8200 Hoja de datos, Descripción, Manual

UNISONIC TECHNOLOGIES CO., LTD
L8200
Preliminary
LINEAR INTEGRATED CIRCUIT
SINGLE LNB-BIAS, CONTROL
AND POWER MANAGEMENT
SOLUTION
DESCRIPTION
The UTC L8200 is a single chip power management and
control solution for LNB’s. The highly integrated solution provides
all the required FET and mixer bias, control detection and
decoding, local oscillator switching and a stable power supply for
the IF amplifier, and additional support functions. Packaged in a
small 16 pin QFN package or 16 pin TSSOP package the UTC
L8200 only requires 3 external components providing a very small
compact solution. Being at the heart of the LNB monitoring the
control, power management and environmental conditions the
UTC L8200 is able to provide reliable solution eliminating effects
such as false switching and over loading.
FEATURES
* Single chip LNB bias, control and power management
* Integrated regulated supply for LNB
* Zero Gate FET switching
* Voltage detection for polarization switching
* 22kHz tone detector with signal rejection for band switching
* Programmable mixer and FET bias
ORDERING INFORMATION
Ordering Number
L8200G-P16-R
L8200G-Q16-3030-R
Package
TSSOP-16
QFN-16(3×3)
Packing
Tape Reel
Tape Reel
L8200G-P16-R
(1)Packing Type
(2)Package Type
(3)Green Package
MARKING
TSSOP-16
(1) R: Tape Reel
(2) P16: TSSOP-16, Q16-3030: QFN-16(3×3)
(3) G: Halogen Free and Lead Free
QFN-16(3×3)
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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L8200 pdf
L8200
Preliminary
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
L*
C*
C1
10nF
JF1
L*
C*
C2
10nF
* Stripline Elements
22kΩ
22kΩ
G1
D1
D2 UTC L8200
G2
To other FET stages
VOUT
HB
LB
CSUB
Power supply for IF Amps
RL1
47nF
RL2
QL
LNB power and tone signal
RH1
RH2
CL1
QH
CH1
9.75GHz Local Osc.
10.6GHz Local Osc.
Capacitors C1 and C2 ensure that residual power supply and substrate generator noise is not allowed to affect
other external circuits which may be sensitive to RF interference. They also serve to suppress any potential RF feed
through between stages via the UTC L8200. These capacitors are required for all stages used. Values of 10nF and
4.7nF respectively are recommended however this is design dependent and any value between 1nF and 100nF
could be used. The capacitor CSUB is an integral part of the UTC L8200 ’s negative supply generator. The negative
bias voltage is generated on-chip using an internal oscillator. The required value of capacitor CSUB is 47nF. This
generator produces a low current supply of approximately -3V. Although this generator is intended purely to bias the
external FETs, it can be used to power other external low current circuits via the CSUB pin. Resistor RCALA sets the
drain current at which all external amplifier FETs are operated and RCALM sets the mixer bias current. If any bias
control circuit is not required, its related drain and gate connections may be left open circuit without affecting the
operation of the remaining bias circuits. The UTC L8200 have been designed to protect the external FETs form
adverse operating conditions. With a JFET connected to any bias circuit, the gate output voltage of the bias circuit
can not exceed the range -3.0V~1V under any conditions, including power up and power down transients. Should
the negative bias generator be shorted or overloaded so that the drain current of the external FETs can no longer be
controlled, the drain supply to FETs is shut down to avoid damage to the FETs by excessive drain current. UTC
L8200 incorporates over and under voltage protection so is the receiver or installation develops a fault the LNB will
shut down and restart once operating conditions are back to normal.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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