AIF12W300 Datasheet, PDF (32/38 Pages) Astec America, Inc – DC-DC Converter Module

Technical Reference Notes
AIF12W300 DC-DC Series
Basic Operation and Features (continued)
DIGITAL CONTROL
The module shall be capable to be controlled by I²C interface, which is SMBus compatible, via I²C CLK and I²C DATA pins.
These two pins share the same pin location of CLIM ADJ and V ADJ pins respectively. Digital control is selected when Digital
Control Select (DCS) pin voltage is between 2V - 4V.
There are 7 command registers for read operation, 4 command registers for read/write operation and 1 command register for
write operation.
Command Register
MODEL_NO (read only)
SERIAL_NO (read only)
FIRMWARE_VER (read only)
MODEL_REV (read only)
SLAVE_ADDRESS (read/write)
OVP_ADJ (read/write)
V_ADJ (read/write)
CLIM_ADJ (read/write)
TMON (read only)
VOUT (read only)
CMON (read only)
RESET (write only)
Description
Read model name of the module
Read serial number on bar code label
Read firmware version
Read model revision
Read or set slave address of the module
Read or set overvoltage protection threshold of the module
Read or set output voltage of the module
Read or set current limit protection threshold of the module
Read baseplate temperature of the module
Read output voltage of the module
Read output current of the module
Reset all control parameters to factory setting
DIGITAL DATA CONVERSION
Each control and monitoring data is in 10-bit format. The data conversion formulae are as follows.
OVP_ADJ:
The range of the OVP_ADJ can be adjusted from 125% to 145% of V_O (nom). The received/transmitted data is calculated by
the equation below.
Receive Data (from module to PC):
Input Data: MCU OVPadj (integer)
Output Data: OVPadj% (round to 1decimal place)
OVPadj% = 145% − ^{MCU OVPadj} × 20%
205
Transmit Data (from PC to module):
Input Data: OVPadj (round to 1 decimal place)
Output Data: MCU OVPadj (integer)
MODEL: AIF12W300 SERIES
JUNE 2006
SHEET 32 OF 37