Datasheet

EVM Configuration Using the Fusion GUI www.ti.com
5 EVM Configuration Using the Fusion GUI
The TPS40422 on this EVM leaves the factory pre-configured. See Table 3 for a short list of key factory
configuration parameters as obtained from the configuration file.
Table 3. Key Factory Configuration Parameters
Address Hex Address Dec Part ID
0x1B 27 TPS40422
General
Cmd ID With Phase Cmd Code Hex Encoded Hex Decoded Numeric Comments
VIN_OFF 0x36 0xF014 5.00 V 5 Turn OFF voltage
VIN_ON 0x35 0xF01C 7.00 V 7 Turn ON voltage
Vout 1 Comments
IOUT_CAL_GAIN 0x38 0x8821 1.0071 mΩ 1.0071 DCR of output inductor
IOUT_CAL_OFFSET 0x39 0xE000 0.0000 A 0 Current offset for GUI readout
IOUT_OC_FAULT_LIMIT 0x46 0xF83C 30.0 A 30 OC fault level
IOUT_OC_FAULT_RESPONSE 0x47 0x3C Restart Continuously Response to OC fault
IOUT_OC_WARN_LIMIT 0x4A 0xF832 25.0 A 25 OC warning level
MFR_04 (VREF_TRIM) 0xD4 0x0000 0.000 V 0 Trim voltage
Control signal and OPERATION command
ON_OFF_CONFIG 0x02 0x02 Mode: Always Converting
not required
Unit: Immediate Off; Margin:
OPERATION 0x01 0x00 Response to turn OFF trigger
None
OT_FAULT_LIMIT 0x4F 0x007D 125 C 125 OT fault level
OT_WARN_LIMIT 0x51 0x0064 100 C 100 OT warn level
TON_RISE 0x61 0xE02B 2.6875 ms 2.6875 Soft-start time
Vout 2 Comments
IOUT_CAL_GAIN 0x38 0x8821 1.0071 mΩ 1.0071 DCR of output inductor
IOUT_CAL_OFFSET 0x39 0xE000 0.0000 A 0 Current offset for GUI readout
IOUT_OC_FAULT_LIMIT 0x46 0xF832 25.0 A 25 OC fault level
IOUT_OC_FAULT_RESPONSE 0x47 0x3C Restart Continuously Response to OC fault
IOUT_OC_WARN_LIMIT 0x4A 0xF828 20.0 A 20 OC warning level
MFR_04 (VREF_TRIM) 0xD4 0x0000 0.000 V 0 Trim voltage
Control signal and OPERATION command
ON_OFF_CONFIG 0x02 0x02 Mode: Always Converting
not required
Unit: Immediate Off; Margin:
OPERATION 0x01 0x00 Response to turn OFF trigger
None
OT_FAULT_LIMIT 0x4F 0x007D 125 C 125 OT fault level
OT_WARN_LIMIT 0x51 0x0064 100 C 100 OT warn level
TON_RISE 0x61 0xE02B 2.6875 ms 2.6875 Soft-start time
If it is desired to configure the EVM to settings other than the factory settings shown in Table 3, the TI
Fusion Digital Power Designer software can be used for reconfiguration. It is necessary to have input
voltage applied to the EVM prior to launching the software so that the TPS40422 may respond to the GUI
and the GUI can recognize the TPS40422. The default configuration for the EVM is to start converting at
an input voltage of 7 V; therefore, to avoid any converter activity during configuration, an input voltage less
than 7 V must be applied. An input voltage of 5 V is recommended.
5.1 Configuration Procedure
1. Adjust the input supply to provide 5 Vdc, current limited to 1 A.
2. Apply the input voltage to the EVM. See Figure 2 and Figure 3 for connections and test setup.
3. Launch the Fusion GUI software. See the screen shots in Section 10 for more information.
4. Configure the EVM operating parameters as desired.
14
Using the PWR091EVM Dual-Output DC/DC Analog With PMBus Interface SLVU638–January 2012
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