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Evaluates: MAX20331/MAX20331A
MAX20331 Evaluation Kit
7) Remove power supply from COM1, connect 1V
General Description
supply on COM2, and verify NC2 is now 1V.
The MAX20331 evaluation kit (EV kit) is a fully assembled
and tested circuit board that demonstrates the MAX20331
high-voltage OVP on audio line device. The EV kit comes
with the MAX20331EWL+ installed. The MAX20331 EV
kit can also be used to evaluate MAX20331A.
8) Increase voltage on COM2. NC2 voltage goes
down to 0V when COM2 voltage reaches about
3.45V.
9) Decrease COM2 voltage. NC2 voltage again fol-
lows COM2 voltage.
Features
● 3.5mm Jack Audio Line Protection
10) Set COM2 voltage to -1V and verify NC2 voltage
is -1V.
● Proven PCB Layout
11) Decrease COM2 voltage and verify NC2 voltage
goes up to 0V when COM2 voltage reaches
about -3.45V.
● Fully Assembled and Tested
EV Kit Contents
● EV kit board containing a MAX20331
Detailed Description
The MAX20331 EV kit is a fully assembled and tested
circuit board demonstrating the MAX20331 audio line
overvoltage protector in a 9-bump wafer-level package
(WLP). The MAX20331 has overvoltage threshold ±3.45V.
Quick Start
Required Equipment
●● MAX20331 EV kit
●● Two Power Supplies
●● Multimeter
V
CC
The V
Power Supply
can be connected from USB power supply
CC
source or externally supplied from TP15.
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
Table 1. V
Jumper Setting
CC
1) Connect a 3V supply on TP15 and verify LED1
SHUNT
POSITION
JUMPER
DESCRIPTION
is on.
2) Connect a 1V supply on COM1 and verify NC1
1-2*
V
V
is connected to VEXT TP15
is connected to LDO Output
CC
JU1
is now 1V.
2-3
CC
3) Increase voltage on COM1. NC1 voltage should
go down to 0V when COM1 voltage reaches
about 3.45V.
*Default position.
Ordering Information
4) Decrease COM1 voltage. NC1 voltage again fol-
lows COM1 voltage.
PART
TYPE
5) Set COM1 voltage to -1V and verify NC1 voltage
MAX20331EVKIT#
#Denotes RoHS compliant.
EVKIT
is -1V.
6) Decrease COM1 voltage and verify NC1 voltage
goes up to 0V when COM1 voltage reaches
about -3.45V.
319-100226; Rev 1; 2/19