MAX14914 Evaluation Kit
Evaluates: MAX14914
General Description
The MAX14914 evaluation kit (EV kit) provides a proven
design to evaluate the MAX14914, a configurable industrial
digital output driver/digital input. The EV kit allows controlling
of the MAX14914 as either a digital output (in either
High-Side or Push-Pull mode) or digital input with simple
jumper settings.
The EV kit must be powered from an external +24V power
supply and can consume up to 1.3A (minimum) when fully
loaded.
The MAX14914EVKIT comes with a MAX14914ATE+
installed in a 16-pin, 4x4mm TQFN-EP package.
● Robust Operation with Wide Range of Input Voltages
and Load Conditions
● -40°C to +125°C Temperature Range
● On-Board LED Indication of Status and Fault
Conditions
●
Reverse Supply Voltage Protection
● Proven PCB Layout
● Fully Assembled and Tested
Ordering Information
appears at end of data sheet.
Features
MAX14914 EV Kit Board Photo
19-8773; Rev 0; 2/17
MAX14914 Evaluation Kit
Evaluates: MAX14914
MAX14914 EV Kit Block Diagram
+24V
PGND
V5
V5
OV_VDD
REGIN
DI_EN
VL
VL
GND
FAULT
DOI_LVL
MAX14914
PGND
VL
Quick Start
Required Equipment
●
MAX14914 EV kit
●
Voltmeter
● Function generator (optional)
● Oscilloscope (optional)
● +24V power supply
3)
4)
5)
6)
7)
8)
9)
Use TP11 (DOI) and TP12 (PGND) to check that the
DOI level is high-Z by voltmeter or oscilloscope.
Move the J4 shunt to 1-2 position (IN = high). Observe
that the DOI level becomes high and DS2 LED lights up.
Move the J4 shunt back to the 2-3 position (IN = low).
Move the J5 shunt to 1-2 position (PP = high, enable
Push-Pull mode).
Repeat steps 4 and 5 to verify that the DOI output and
check that the DS2 LED follows the IN settings.
Move J3 shunt to 1-2 position (DI_EN = high, enable DI
mode). Note that the shunts position of J4 is ignored.
Apply static 24V between TP11 (DOI) and TP12
(PGND).
Procedure
1)
2)
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
Verify that all jumpers are in their default positions for
the digital output (DO), high-side operation (Table
1).
Power up the EV kit with +24V from an external power
supply. Apply +24V to the TP16 banana jack and 0V
to the TP15 banana jack.
10)
Observe that the DS2 LED follows the level of the DOI
input.
IN
PP
CLIM
VDD
DOI
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MAX14914 Evaluation Kit
Evaluates: MAX14914
Table 1. MAX14914 Board Shunt Positions and Settings
HEADER
SHUNT
POSITION
DESCIPTION
1-2*
J1
Open
1-2*
J2
2-3
Open
2-3*
J3
1-2
Open
2-3*
J4
1-2
Open
2-3*
J5
1-2
Open
1-3*
JMP1
1-2
1-4
Open
*Default
configuration
Connected V
L
to V
5
and set input logic level to 5V
Connect an external supply between TP5 (V
L
) and TP4 (GND) to provide the user-defined
input logic level from 2.5V to 5.5V
Input to the internal 5V regulator (REGIN) is from V
DD
source
Bypass the external voltage regulator and apply an external 5V supply to TP3 to power up
the device.
Provide an external 6~40V supply to J2.2
Set DI_EN low to enable digital output (DO) operation
Set DI_EN high to enable digital input (DI) operation
DO operation is enabled by internal weak pulldown resistor
Set IN low and DOI three-state/low
Set IN high and DOI high
Provide square wave from function generator to TP10
Set PP low and DO High-Side mode or DI Type 1, 3 mode in conjunction with J3 setting
Set PP high and DO Push-Pull mode or DI Type 2 mode in conjunction with J3 setting
Set PP low and DO High-Side mode or DI Type 1, 3 Mode by internal pulldown resistor in
conjunction with J3 setting
Select C
LIM
= 51k and set current limit to ~900mA
Select C
LIM
= 27k and set current limit to ~1.6A
Select C
LIM
= 220k and set current limit to ~200mA
Current limit internally set to ~1.1A
Detailed Description of Hardware
The MAX14914 EV kit allows the user to evaluate all the
features and operational modes of the MAX14914 digital
High-Side/Push-Pull driver. It also can be configured as a
digital input level translator.
External Power Supply/Supplies
The 24V field supply is reverse-voltage protected and toler-
ant up to 60V supply spikes. Reverse-voltage protection
is achieved in the Q1 transistor. Refer to the MAX14914
EV kit schematic. The MAX14914 is immune to ±2.0kV
1.2/50µs surge pulses applied between the DOI and
PGND load lines.
A power to the 5V internal regulator can be provided
directly from either the V
DD
pin or from an external supply;
selectable at the J2 header. Refer to
Table 1
for details.
If a logic interface of less than 5V is used from a micro-
controller (3.3V, for example), a secondary power supply
is needed to power up the V
L
pin through the TP5 test
point with the correct voltage. In this case, the J1 header
should be left open.
The EV kit is powered from a single power supply and
accepts a wide range of input voltages, from 10V to
40V. The power is applied through two banana jacks,
TP16 (+) and TP15 (-). The MAX14914 can drive up
to 1.5A of current to the external load. The load is
connected to the EV kit through the J7 terminal block.
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Maxim Integrated │
3
MAX14914 Evaluation Kit
Evaluates: MAX14914
Digital Output Operation
The user can manually control the IN input either by shunt
position on the J4 header (refer to
Table 1)
or by apply-
ing square wave to the TP10 from an external function
generator or microcontroller. The J5 shunt sets either the
High-Side or Push-Pull mode of operation. The High-Side
mode is mostly used with the high current-resistive and
inductive loads, while Push-Pull is often used for high-
speed resistive and capacitive loads. The MAX14914
supports up to a 100kHz switching frequency. When using
high-frequency push-pull mode switching, be aware that
the 10nF (C8) capacitor charging/discharging current
generates very high power dissipation in the MAX14914.
Fault Indication
The fault LED (DS1) turns on when the driver exceeds
170°C or a loss of ground is detected. The DOI output is
three-stated and the device will not operate until the fault
condition disappears.
Ordering Information
PART
MAX14914EVKIT#
#Denotes RoHS compliant.
TYPE
EV Kit
Digital Input Operation
When the DI_EN is high (J3 shunt in position 1-2) the
MAX14914 works as digital input. In this mode, the input
signal applied between the DOI pin (J7.2 or TP11) and
PGND (J7.1 or TP12) is level-shifted and inverted to the
output on TP8 (DOI_LVL).
Note that the
DOI_LVL
is an
open-drain output and needs a pullup to the V
L
voltage
level.
DOI_LVL
is logically inverted to the DOI input. So,
the LED DS2 reflects the real logic state of the DOI input.
In digital input mode, the MAX14914 supports both IEC
Type 1/3 as well as Type 3 inputs. Set J5/PP logic input
high for Type 2 input characteristics.
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Maxim Integrated │
4
MAX14914 Evaluation Kit
Evaluates: MAX14914
MAX14914 EV Kit Bill of Materials
ITEM
1
REF_DES
C1
DNI/DNP
-
QTY
1
MFG PART #
GRM32ER71J106KA12
C0603C105K4RAC;
GRM188R71C105KA12;
C1608X7R1C105K;
EMK107B7105KA
GCJ188R71H104KA12;
GCM188R71H104K;
CGA3E2X7R1H104K080AE
GRM2195C1H103JA01
MM3Z12VT1G
SMBJ40A
LTST-C191KRKT
LGL29K-G2J1-24-Z
PCC02SAAN
PCC03SAAN
ED555/2DS
PEC04SAAN
DMP6023LE
CRCW040227K0FK
ERJ-2RKF5102
MCR03EZPFX2002;
ERJ-3EKF2002
CRCW0402220KFK;
9C04021A2203FLHF3
RC1005F2802
CRCW06033K30FK
CRCW04021K00FK;
RC0402FR-071KL
STC02SYAN
5010
5011
MANUFACTURER
MURATA
VALUE
10UF
DESCRIPTION
CAPACITOR; SMT (1210); CERAMIC CHIP;
10UF; 63V; TOL = 10%; TG = -55°C TO +125°C;
TC = X7R
CAPACITOR; SMT (0603); CERAMIC CHIP;1UF;
16V; TOL = 10%; MODEL = ; TG = -55°C TO +125°C;
TC = X7R
CAPACITOR; SMT (0603); CERAMIC CHIP;
0.1UF; 50V; TOL = 10%; TG = -55°C TO +125°C;
TC = X7R; AUTO
CAPACITOR; SMT; 0805; CERAMIC; 0.01uF;
50V; 5%; COG; -55°C to + 125°C;
0?30ppm/?C from -55°C to +125°C
DIODE; ZNR; SMT (SOD-323);
PIV = 12V; IZ = 0.005A
DIODE; TVS; SMB (DO-214AA);
VRM = 40V; IPP = 9.3A
DIODE; LED; SMD LED; RED;
SMT (0603); VF = 2V; IF = 0.02A
DIODE; LED; SMARTLED; GREEN;
SMT; PIV=1.7V; IF=0.02A
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY;
STRAIGHT THROUGH; 2PINS; -65°C TO +125°C
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY;
STRAIGHT THROUGH; 3PINS; -65°C TO +125°C
CONNECTOR; FEMALE; THROUGH HOLE;
TERMINAL BLOCK; RIGHT ANGLE; 2PINS
CONNECTOR; MALE; THROUGH HOLE;
BREAKAWAY; STRAIGHT; 4PINS
TRAN; 60V P-CHANNEL ENHANCEMENT MODE MOSFET;
PCH; SOT223-4; PD-(2W); I-(-7A); V-(-60V)
RESISTOR, 0402, 27KΩ, 1%,
100PPM, 0.0625W, THICK FILM
RESISTOR; 0402; 51KΩ; 1%;
100PPM; 0.1W; THICK FILM
RESISTOR; 0603; 20KΩ; 1%;
100PPM; 0.10W; THICK FILM
RESISTOR; 0402; 220KΩ; 1%;
100PPM; 0.063W; THICK FILM
RESISTOR; 0402; 28KΩ; 1%;
100PPM; 0.063W; THICK FILM
RESISTOR, 0603, 3.3KΩ, 1%,
100PPM, 0.10W, THICK FILM
RESISTOR; 0402; 1K; 1%;
100PPM; 0.0625W; THICK FILM
TEST POINT; JUMPER; STR; TOTAL LENGTH = 0.256IN; BLACK;
INSULATION = PBT CONTACT = PHOSPHOR BRONZE;
COPPER PLATED TIN OVERALL
TESTPOINT WITH 1.80MM HOLE DIA, RED, MULTIPURPOSE;
TEST POINT; PIN DIA = 0.125IN; TOTAL LENGTH = 0.445IN;
BOARD HOLE=0.063IN; BLACK;
PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
TEST POINT; PIN DIA = 0.1IN; TOTAL LENGTH = 0.3IN;
BOARD HOLE =0.04IN; ORANGE;
PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
TEST POINT; PIN DIA = 0.125IN;
TOTAL LENGTH = 0.445IN; BOARD HOLE = 0.063IN; ORANGE;
PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;
CONNECTOR; FEMALE; PANELMOUNT;
NON-INSULATED RECESSED HEAD BANANA JACK;
STRAIGHT THROUGH; 1PIN
EVKIT PART - IC; SWITCH; HIGH-SIDE SWITCH WITH SETTABLE
CURRENT LIMIT AND PUSH-PULL DRIVER OPTION;
NO. OF LEADS-(16); TQFN16-EP
KIT; ASSY-STANDOFF 3/8IN;
1PC. STANDOFF/FEM/HEX/4-40IN/(3/8IN)/NYLON;
1PC. SCREW/SLOT/PAN/4-40IN/(3/8IN)/NYLON
CAPACITOR; SMT (1210); CERAMIC CHIP; 10UF; 63V;
TOL = 10%; TG = -55°C TO +125°C; TC = X7R
CAPACITOR; SMT (0805); CERAMIC CHIP; 1UF; 100V;
TOL = 10%; TG=-55°C TO +125°C; TC = X7S
DIODE; TVS; SMB (DO-214AA);
VRM=40V; IPP = 9.3A
RESISTOR; 0805; 150K; 1%;
100PPM; 0.125W; THICK FILM
PCB Board:MAX14914 EVALUATION KIT
DNI
DNI
DNI
DNI
COMMENTS
2
C2, C3
-
2
KEMET/MURATA/TDK/
TAIYO YUDEN
1UF
3
C5, C7
-
2
MURATA; TDK
0.1UF
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
C8
D1
D2
DS1
DS2
J1
J2-J5
J7
JMP1
Q1
R1
R2
R3
R4
R5
R6, R7
R8-R10
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
2
3
MURATA
ON SEMICONDUCTOR
BOURNS
LITE-ON ELECTRONICS INC.
OSRAM
SULLINS
SULLINS
ON-SHORE TECHNOLOGY INC
SULLINS ELECTRONICS CORP.
DIODES INCORPORATED
VISHAY DALE
PANASONIC
ROHM; PANASONIC
VISHAY DALE;
YAGEO PHYCOMP
SAMSUNG ELECTRONICS
VISHAY DALE
VISHAY DALE;
YAGEO PHICOMP
SULLINS ELECTRONICS CORP.
KEYSTONE
KEYSTONE
0.01UF
12V
40V
LTST-C191KRKT
LGL29K-G2J1-24-Z
PCC02SAAN
PCC03SAAN
ED555/2DS
PEC04SAAN
DMP6023LE
27K
51K
20K
220K
28K
3.3K
1K
21
22
23
SU1-SU5
TP1, TP9
TP2, TP4, TP12
TP3, TP5-TP8,
TP10, TP13,
TP14
TP11
-
-
-
5
2
3
STC02SYAN
N/A
N/A
24
-
8
5003
KEYSTONE
N/A
25
-
1
5013
KEYSTONE
N/A
26
TP15, TP16
-
2
6095
KEYSTONE
6095
27
U1
-
1
MAX14914ATE+
MAXIM
MAX14914ATE+
28
J6, J8-J10
DNI
4
EVKIT_STANDOFF_4-40_3/8
?
EVKIT_STANDOFF_
4-40_3/8
10UF
1UF
40V
150K
PCB
29
30
31
32
33
TOTAL
C4
C6
D3
R11
PCB
DNP
DNP
DNP
DNP
-
0
0
0
0
1
55
GRM32ER71J106KA12
C2012X7S2A105K125;
GRJ21BC72A105KE11
SMBJ40CA
CRCW0805150KFK
MAX14914
MURATA
TDK/MURATA
BOURNS
VISHAY DALE
MAXIM
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Maxim Integrated │ 5
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