ASL4501SHN datasheet(23/43 Pages) NXP

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ASL4501SHN

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Product data sheet

Rev. 2 — 10 January 2018

23 of 43

NXP Semiconductors

ASL4501SHN

Four-phase boost converter

8.10 Diagnostic information

The diagnostic register contains useful information for diagnostic purposes. Details for

each bit can be found in the following subchapters.

8.10.1 Bit VIN_OV

The bit VIN_OV depends on the battery monitoring functionality as described in

Section 8.8. It indicates that the device has detected an overvoltage condition and entered

the fail silent mode. A write access to the diagnostic register, or once the off mode is

entered, clears the bit. The device stays in fail silent mode irrespective of the clearing of

the bit.

8.10.2 Bit VIN_UV

The bit VIN_UV depends on the battery monitoring functionality as described in

Section 8.8. It indicates that the device has detected an undervoltage condition and

entered the fail silent mode. A write access to the diagnostic register, or once the off mode

is entered, clears the bit. The device stays in fail silent mode irrespective of the clearing of

the bit.

8.10.3 Bit SPI_err

The device evaluates all SPI accesses to the device for the correctness of the commands.

When the command is not allowed, the SPI_err bit is set. A write access to the diagnostic

Table 35.

Diagnostic register (address 5Fh)

Bit Symbol

Description

Value Function

Vout1_ok Vout1 regulated

Vout1 is deviating from the target value

Vout1 is regulated to the target value

Vout2_ok Vout2 regulated

Vout2 is deviating from the target value

Vout2 is regulated to the target value

VGG_ok

gate driver regulation

is ok

gate driver is not available

gate driver is available

Tj_err

device temperature

is too high

device temperature below 175

C

device temperature above 175

C

VIN_UV

VIN undervoltage

undervoltage not detected at VIN

undervoltage detected at VIN

VIN_OV

VIN overvoltage

overvoltage not detected at VIN

overvoltage detected at VIN

SPI_err

SPI error

last SPI command was executed correctly

last SPI command was erroneous and has been

discarded

VGG_err

VGG error

VGG overload protection not active

VGG overload protection has turned on and VGG is

deactivated

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