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EVM Configuration Using the Fusion GUI

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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

TPS40422

General

Cmd ID With Phase

Cmd Code Hex

Encoded Hex

Decoded

Numeric

Comments

VIN_OFF

0x36

0xF014

5.00 V

Turn OFF voltage

VIN_ON

0x35

0xF01C

7.00 V

Turn ON voltage

Vout 1

Comments

IOUT_CAL_GAIN

0x38

0x8821

1.0071 m

1.0071

DCR of output inductor

IOUT_CAL_OFFSET

0x39

0xE000

0.0000 A

Current offset for GUI readout

IOUT_OC_FAULT_LIMIT

0x46

0xF83C

30.0 A

OC fault level

IOUT_OC_FAULT_RESPONSE

0x47

0x3C

Restart Continuously

Response to OC fault

IOUT_OC_WARN_LIMIT

0x4A

0xF832

25.0 A

OC warning level

MFR_04 (VREF_TRIM)

0xD4

0x0000

0.000 V

Trim voltage

Control signal and OPERATION command

ON_OFF_CONFIG

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 m

1.0071

DCR of output inductor

IOUT_CAL_OFFSET

0x39

0xE000

0.0000 A

Current offset for GUI readout

IOUT_OC_FAULT_LIMIT

0x46

0xF832

25.0 A

OC fault level

IOUT_OC_FAULT_RESPONSE

0x47

0x3C

Restart Continuously

Response to OC fault

IOUT_OC_WARN_LIMIT

0x4A

0xF828

20.0 A

OC warning level

MFR_04 (VREF_TRIM)

0xD4

0x0000

0.000 V

Trim voltage

Control signal and OPERATION command

ON_OFF_CONFIG

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.

Using the PWR091EVM Dual-Output DC/DC Analog With PMBus Interface

SLVU638

– January 2012

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