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MLX92221LUA-AAA PDF预览

MLX92221LUA-AAA

更新时间: 2024-11-12 02:52:55
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迈来芯 - MELEXIS /
页数 文件大小 规格书
17页 868K
描述
2-Wire Hall Effect Latch

MLX92221LUA-AAA 数据手册

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MLX92221-AAA  
2-Wire Hall Effect Latch  
Features and Benefits  
Applications  
Wide operating voltage range: from 2.7V to 24V  
Integrated self-diagnostics  
Chopper-stabilized amplifier stage  
Programmable Built-in negative temperature  
coefficient  
Reverse Supply Voltage Protection  
Under-Voltage Lockout Protection  
Thermal Protection  
Automotive, Consumer and Industrial  
Wiper motor  
Window lifter  
Seatbelt buckle  
Seat positioning  
Sunroof/Tailgate opener  
Electrical power steering  
High ESD rating / Excellent EMC performance  
Ordering information  
Part No.  
Temperature Code  
L (-40°C to 150°C)  
L (-40°C to 150°C)  
Package Code  
UA (TO92-3L)  
SE (TSOT-23)  
Comment  
BU (Bulk)  
RE (Reel)  
MLX92221LUA-AAA-xxx-BU  
MLX92221LSE-AAA-xxx-RE  
The included voltage regulator operates from 2.7 to 24V,  
hence covering a wide range of applications. With the built-  
in reverse voltage protection, a serial resistor or diode on  
the supply line is not required so that even remote sensors  
can be specified for low voltage operation down to 2.7V  
while being reverse voltage tolerant.  
1. Functional Diagram  
VDD  
Voltage Regulator  
with Reverse Polarity  
Protection  
Under-  
Voltage  
Lockout  
TEST  
Temperature  
Compensation  
Bop/Brp  
reference  
Thermal  
Protection  
In an event of a drop below the minimum supply voltage  
during operation, the under-voltage lock-out protection will  
automatically freeze the device, preventing the electrical  
perturbation to affect the magnetic measurement circuitry.  
The output current state is therefore only updated based on  
a proper and accurate magnetic measurement result.  
Switched  
Hall  
Plate  
Output  
Current Sink  
CDS  
Amplifier  
Trimming  
Register  
Control  
The two-wire interface not only saves one wire, but also  
allows implementation of diagnostic functions as reverse  
polarity connection and malfunction detection.  
GND  
The on-chip thermal protection also switches off the output  
if the junction temperature increases above an abnormally  
high threshold. It will automatically recover once the  
temperature decreases below a safe value.  
2. General Description  
The Melexis MLX92221 is a new generation of Hall-effect  
switches designed in mixed signal submicron CMOS  
technology.  
With latching magnetic characteristics, the supply current  
state is turned high by a sufficiently strong South Pole  
facing the package branded side. Toggling the state of the  
supply current from high to low is possible by applying low  
or no magnetic field.  
The device integrates a voltage regulator, Hall sensor with  
advanced offset cancellation system and a current sink-  
configured output driver, all in a single package.  
Based on a brand-new platform, the magnetic core is using  
an improved offset cancellation system allowing faster and  
more accurate processing while being temperature  
insensitive and stress independent. In addition, a  
temperature coefficient is implemented to compensate the  
natural behaviour of certain types of magnets becoming  
weaker with rise in temperature.  
The MLX92221 is delivered in a Green and RoHS compliant  
Plastic Single-in-Line (TO-92 flat) for through-hole mount or  
PCB-less design or in 3-pin Thin Small Outline Transistor  
(TSOT) for surface mount process  
REVISION 004 JULY 14, 2021  
Page 1 of 17  
390109222102  
 
 
 
 
 

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