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Unidirectional ACS758LCB-100U DC detection over current protection

（DC current, current detection, over current protection function Rang:0A-100A）

This module uses the following chip, the linearity is different, and the other principles can be used to measure DC current.

Unidirectional DC current.
ACS758LCB-050U; 0A-50A     Linearity   K=60mV/1mA；

ACS758LCB-100U; 0A-100A    Linearity   K=40mV/1mA；

ACS770LCB-050U; 0A-50A     Linearity   K=80mV/1mA；

ACS770LCB-100U; 0A-100A    Linearity   K=40mV/1mA；

AC and DC current.
ACS758LCB-050B; -50A-50A     Linearity   K=40mV/1mA；

ACS758LCB-100B; -100A-100A   Linearity   K=20mV/1mA；

ACS758KCB-150B; -150A-150A   Linearity   K=13.3mV/1mA；

ACS758ECB-200B; -200A-200A   Linearity   K=10mV/1mA；

(1)Electrical parameters
DC power supply voltage: VCC:3.3V-5.5V or 7-28VDC   one of the two kinds of voltage is ok;

DC power supply current: 11-50mA;

Working temperature: -20 temperature to 85 temperature;

Isolation voltage: 1.5KV;

Detection current range: 0A-100A

Over current signal: 0.5-100A

Two types of output signals:
(1) Two types of output signal:

Analog output signal ---Aout: the signal is an analog voltage, followed by an op amp, and is suitable for direct connection to the A/D converter.

The signal of overcurrent ---Dout: if we need the overcurrent signal should be press the switch button, and connect the comparison circuit function; Aout>Vref---Dout will output 0V low level; Aout<Vref---Dout will output 5V high level.；

The benefits of this module are:

the response time of 120KHZ is fast;

the switch level switching is stable;

the over current signal setting can be set by adjustable resistance, and Com_Work1 is used as a critical point indicator.

high precision of current;

the use of copper connection nose, can be over 100A large current;

Application:

DC current detection;

motor plugging detection;

load device works detecting;

Plate size:

Board size: 7.2cm*4.8cm; optional 35mm Standard Guide.

Schematic diagram 3

We detailed the parameters for each model
(2) Over current signal---- Dout
If you use this function, please pay attention to pressing the button down.
How to set the reference voltage is appropriate:
Here we focus on how to set the reference voltage to compare with the actual voltage.

(1) Com_Work1 LED indicator lamp

When (set current)Vref<Aout1(actual current) Com Work1 is off ; Dout=0V
When (set current)Vref>Aout1(actual current) Com Work1 is on ; Dout=5V

(3) analog signal Aout

The ACS758LCB-100U linearity K:K=40mV/A, that mean the 1A current corresponds to the change of the 40mV voltage;

detect the current DC ia: 0A ~ 100A;

The output voltage formula: Aout=0.6+Ia*K=0.6+(0.04V*Ia) Ia is the current flowing through the wire;

DC current:

We take the flow current over 1A as an example to show how much the output voltage According to the formula, The Current forward flow

The output voltage is Aout=0.6+Ia*K = 0.6+(0.04V*ia) =0.6+0.04;

The output voltage range is: 0.64V,Aout directly connected with the microcontroller AD port

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