EVAL-ADM1075EBZ User Guide
UG-304
EVALUATION BOARD HARDWARE
SWITCH, JUMPER, AND LED FUNCTIONS
Table 2. Connector Functions
Connector
Description
RTN IN, −48V IN
Hot-swap line voltage inputs that also power the board components. Input voltage is 36 V to 75 V.
RTN OUT, −48V OUT
Hot-swap line voltage outputs.
J6
5 V auxiliary board voltage. Not required; emitter follower circuit used to generate 5 V from 48 V input.
SK1, SK2
Bottom and top cascade connectors; connect with a Micro-MaTch ribbon cable to link with other
EVAL-ADM1075EBZ
boards.
J9
I
2
C/PMBus communication dongle connector. From top down: VEE, SDA, SCL. Note that the dongle should only be
connected at this side (primary side) if using a 0 V to 48 V supply. If using a −48 V to 0 V supply, the USB port can be
damaged. This 3-pin connector is designed to be used with the
USB-SMBUS-CABLEZ
dongle. Not required if using
USB-SDP-CABLEZ.
J7
Isolated side I
2
C/PMBus communication dongle connector. From top down: SCL, SDA, GND. This 3-pin connector is
designed to be used with the
USB-SMBUS-CABLEZ
dongle. Not required if using
USB-SDP-CABLEZ.
J8
5 V isolation supply voltage (power supply).
J5
5 V isolation supply voltage (mini-USB).
SK3
10-way isolated side connector for
USB-SDP-CABLEZ
; I
2
C communication and 5 V supply.
Table 3. Switch Functions
Switch
Description
S_SHDN2
Toggle switch to shut down hot swap. Right = hot swap enabled, and left = hot swap disabled.
S_SHDN
Push-button switch to generate shutdown. Can be used to clear faults. Note that SHDN has a seven-retry counter. After
seven SHDN events, GPO2 goes active low. A restart or clear via PMBus is required to enable the hot swap again.
S_DeLATCH
Push-button switch to clear latch after seven shutdown events (not on Rev. 0 boards).
S_RST
Push-button switch to generate 10 sec restart.
Table 4. LED Functions
LED
Description
D_INPUT
Voltage input > ~10 V detected. Active high; green.
D_LATCH
LATCH, active low; red.
D_PWRGD
PWRGD, active low; green.
D_SPLYGD
SPLYGD, active low; green.
D_GPO1
GPO1/ALERT1/CONV, active low; yellow.
D_GPO2
GPO2/ALERT2, active low; yellow.
D_ISO
Isolation 5 V power supply. Active high; blue (not on Rev. 0 boards).
Table 5. On-Board ICs
IC
Description
U1
ADM1075
main IC
U2
64 kb I
2
C EEPROM
U3
ADuM3200
, dual-channel digital isolator
U4
ADuM1250
, dual I
2
C isolator
U5
ADuM5404
, quad-channel isolator with integrated dc-to-dc converter
UT1 to UT3
ADT75
, ±2°C accurate, 12-bit digital temperature sensor, sensing temperature on the MOSFETs
Table 6. Retry Configuration
BOM Component
Retry Scheme
R_7retry
R_1rty_10s
R_7rty_10s
No Retries (Latch Off)
Not populated
Not populated
Not populated
7 Retries, Then Latch Off (Default)
0 Ω
Not populated
Not populated
1 Retry Every 10 Seconds
Not populated
0 Ω
Not populated
7 Retries Every 10 Seconds
Not populated
Not populated
0 Ω
Rev. C | Page 5 of 19
