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PDF L8401 Data sheet ( Hoja de datos )
| Número de pieza | L8401 | |
| Descripción | FET BIAS CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
L8401
LINEAR INTEGRATED CIRCUIT
FET BIAS CONTROLLER
DESCRIPTION
The UTC L8401 is designed to bias the MOSFETs that
are commonly used in LNBs that can implies minimum
external components requires.
FEATURES
* Can Bias up to 4 FETs
* Drain Current Adjustable by Two External Resistors.
* Two Sets of Drain Current can be Setted.
ORDERING INFORMATION
Ordering Number
L8401G-R16-R
Package
SSOP-16
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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L8401
LINEAR INTEGRATED CIRCUIT
APPLICATIONS INFORMATION
It is application circuit of UTC L8401 in figure 2, the bias circuits is stable fully in -40°C ~80°C.
CNB and CSUB are used to generated the negative supply on pin CSUB (about -2.5V), which can be used to power
other external circuits, but it is low load current is noticeable.
C1 and C2 are used to suppress noise or RF interference in each stage of the IC or other external circuits in
application circiut system. Value of C1 and C2 could be used in 1nF to 100nF as design dependent.
RCAL1 and RCAL2 are used to set the drain current of FETs 1 & 2 and FETS 3 & 4. If the same drain current is
required for all FETs on UTC L8401, then the pin RCAL1 and RCAL2 can be connected to GND through only one res of
half normal value.
There are full protection for external FETs on chip: The gate output voltage is limitted in -2.5V~0.7V in any
conditions including powerup and powerdown transients; If the negative bias generator be shorted or overloaded, the
drain supply to FETs is shut down to avoid damage to the FETs by excessive drain current.
The fig.3 is typical applications of UTC L8401 in LNB.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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| Número de pieza | Descripción | Fabricantes |
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