Datasheet

Maxim Integrated │ 3
MAX31790 Evaluation Kit Evaluates: MAX31790
www.maximintegrated.com
Component List (continued)
*EP = Exposed pad.
MAX31790 EV Kit Files
Note: The .EXE file is downloaded as a .ZIP file.
Quick Start
Required Equipment
● MAX31790EVkit
● User-suppliedWindowsXP,WindowsVista,or
Windows 7 PC with USB port
● Mini-USBcable(included)
● EVkithardware(included)
● User-supplied3.3Vpowersupply(300mAminimum)
● User-supplied12VVFANpowersupply
● User-suppliedDCfan
Note: In the following sections, software-related items are
identified by bolding. Text in bold refers to items directly
from the EV kit software. Text in
bold and under lined
refers to items from the Windows operating system.
Setup Procedure
TheEVkitisfullyassembledandtested.Followthesteps
below to verify board operation:
1) Place the EV kit hardware on a nonconductive
surface to ensure that nothing on the PCB gets
shorted to the workspace.
2) Ensure that jumper/shunt J1 is installed, which
provides power to the device.
3) Check the following startup configuration jumpers/
shunts, which result in the associated behavior:
a. J8 (PWM_START1) = GND and J7 (PWM_
START0) = VCC. Defines a power-on-reset (POR)
PWMdutycycleof75%.
b. J2(FREQ_START)=VCC.DefinesaPORPWM
frequency of 25kHz.
c. J3 (SPIN_START) = VCC. Defines the POR spin-
upbehaviorfor100%dutycycleuntiltwotachom-
eter pulses or 1s (MAX).
d. J4 (WATCHDOG_START) = GND. Defines a
disabled I
2
C watchdog on POR.
e. J5 (ADD0) = GND and J6 (ADD1) = GND. Defines
a POR slave address of 40h.
DESIGNATION QTY DESCRIPTION
R7–R10, R100,
R200, R300,
R400, R500,
R600
10
0Ω±1%resistors(0805)
VishayCRCW0805000RFKEA
R9I 1
2.2kΩ±1%resistor(0603)
VishayCRCW06032K20FKEA
R10I 1
4.7kΩ±1%resistor(0603)
VishayCRCW06034K70FKEA
R11 1
100Ω±10%resistor(0805)
VishayCRCW0805100RFKEA
TP1–TP5,
TP22–TP28,
TP40–TP57
30
White test points
Keystone 5012
TP6–TP8,
TP30–TP35
9
Black test points
Keystone 5011
TP29 1
Red test point
Keystone 5010
TP37 1
Yellow test point
Keystone 5014
DESIGNATION QTY DESCRIPTION
U1 1
Fancontroller(28TQFN-EP*)
Maxim MAX31790ATI+
U1I 1
Current-limit switch (5 SOT70)
Maxim MAX4787EXK+
U2I 1
Linearregulator(5SOT23)
Maxim MAX8868EUK33+
U3I 1
USB transceiver (16 TSSOP)
Maxim MAX3344EEUE+
U4I 1
FXMA108
FairchildFXMA108BQX
U5I 1
PIC
MicrochipPIC18LF2550-I/SO
X1 1
12pFcrystal
Epson C-002SH 32.7680KA-A
X1I 1
4-pin CMOS oscillator
AVX KC3225A48.0000C30E00
— 1
PCB:MAX317906FAN
CONTROLLER,
12FANMONITOR
FILE DESCRIPTION
MAX31790EVKitSoftware.EXE Application program