Datasheet

Exponent

OUT(max)

V Mantissa 2= ´

TPS40400

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SLUS930B –APRIL 2011– REVISED OCTOBER 2011

MFR_VOUT_MAX (A5h)

The command returns a two-byte result that represents the maximum output voltage that the TPS40400

supports.

Command MFR_VOUT_MAX

Format Linear, two's complement binary

Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Access r r r r r r r r r r r r r r r r

Function Mantissa

Default Value 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0

The setting of the VOUT_MODE affects the results of this command as well. In the TPS40400, VOUT_MODE is

set to linear mode with an exponent of –10 and cannot be altered. The maximum nominal output voltage can be

found by:

(31)

This evaluates to 12 V using the pre-set values.

Exponent

Fixed at –10.

Mantissa

Fixed at 12288

MFR_SPECIFIC_00 (D0h)

The MFR_SPECIFIC_00 command is used for storing arbitrary user data and for selecting a dead time or

anti-cross conduction time for the TPS40400. The contents of this register can be stored to non-volatile memory

using the STORE_DEFAULT_ALL or STORE_DEFAULT_CODE commands.

This command take a two byte unsigned binary argument as follows.

Command MFR_SPECIFIC_00

Format Unsigned binary

Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Access r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w r/w

Function USER_DATA USER_DATA WPE DTC

Default Value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Dead Time Control setting (DTC)

• 0: Fast. Dead time = ~25 ns

• 1: Slow. Dead time = ~ 50 ns

WPE

Write protect extension. Writing a 1 to this bit position permanently locks the following parameters:

• IOUT_CAL_GAIN

• IOUT_CAL_OFFSET

• FREQUENCY_SWITCH

• IOUT_OC_FAULT_LIMIT

• MFR_SPECIFIC_00

Product Folder Link(s) :TPS40400