MAX14626EVKIT 查看數據表（PDF） - Maxim Integrated
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MAX14626EVKIT Datasheet PDF : 6 Pages
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MAX14626 Evaluation Kit
Evaluates: MAX14626
Quick Start
Required Equipment
● MAX14626 EV kit
● 25V DC power supply
● Ammeter
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
1) Verify that all jumpers are in their default positions,
as shown in Table 1.
2) Install shunts on jumpers JU7 and JU8.
3) Connect one side of the ammeter to 25V power
supply and the other side to TP1 to measure the
current going through the device and load.
4) Connect the ground of the power supply to TP2.
5) Install a shunt on jumper JU2.
6) Turn on the 25V power supply. Verify that the
ammeter reading is approximately 30mA.
7) Turn off the power supply.
8) Remove the shunt on JU2. Install a shunt on
jumper JU3.
9) Turn on the 25V power supply. Verify that the
ammeter reading is approximately 30mA.
10) Turn off the power supply.
11) Remove the shunt on JU3. Install a shunt on
jumper JU4.
12) Turn on the 25V power supply. Verify that the
ammeter reading is approximately 19.6mA.
13) Turn off the power supply.
14) Remove the shunt on JU4. Install a shunt on
jumper JU5.
15) Turn on the 25V power supply. Verify that the amme-
ter reading is approximately 10.9mA.
16) Turn off the power supply.
Detailed Description of Hardware
The MAX14626 EV kit is a fully assembled and tested
circuit board demonstrating the MAX14626 high-voltage
4–20mA current-loop protector IC in a 6-pin surface-
mount TDFN package with an exposed pad.
Using all the jumpers, the EV kit circuit can be configured
to evaluate the current-limit capability of the device. For
example, with shunts on JU7 and JU8, the load is 249Ω.
With shunt on JU2, the added resistance is 200Ω. The
on-resistance of the device is approximately 25Ω. With
25V input, the current going through the device can be
calculated as 25V/(249Ω + 25Ω + 200Ω) = 52.7mA, but
the actual current going through is limited by the device to
be approximately 30mA.
Table 1. Jumper Settings (JU1–JU8)
JUMPER
JU1
JU2
JU3
JU4
JU5
JU6
JU7
SHUNT
POSITION
Installed
Not installed*
Installed
Not installed*
Installed
Not installed*
Installed
Not installed*
Installed
Not installed*
Installed
Not installed*
Installed
Not installed*
Installed
JU8
Not installed*
*Default position.
DESCRIPTION
TP1 connected directly to IN
TP1 not connected to IN
TP1 connected to 200Ω to IN
TP1 not connected to IN
TP1 connected to 500I IN
TP1 not connected to IN
TP1 connected to 1kI to IN
TP1 not connected to IN
TP1 connected to 2kΩ to IN
TP1 not connected to IN
TP1 connected to variable
resistor to IN
TP1 not connected to IN
OUT connected 499Ω to
ground
OUT not connected 499Ω
to ground
OUT connected 499Ω to
ground
OUT not connected 499Ω
to ground
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