BTS6480SF datasheet(13/73 Pages) INFINEON

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SPOC - BTS6480SF

Power Supply

Data Sheet

Rev. 1.0, 2010-04-12

Power Supply

The SPOC - BTS6480SF is supplied by two supply voltages

BB and VDD. The VBB supply line is used by the power

switches. The

DD supply line is used by the SPI related circuitry and for driving the SO line. A capacitor between

pins VDD and GND is recommended as shown in Figure 30.

There is a power-on reset function implemented for the

DD logic power supply. After start-up of the logic power

supply, all SPI registers are reset to their default values. The SPI interface including daisy chain function is active

as soon as

DD is provided in the specified range independent of VBB. First SPI data are the output register values

with TER = 1.

Specified parameters are valid for the supply voltage range according

BB(nor) or otherwise specified. For the

extended supply voltage range according

BB(ext) device functionality (switching, diagnosis and protection

functions) are still given, parameter deviations are possible.

5.1

Power Supply Modes

The following table shows all possible power supply modes for

BB, VDD and the pin LHI.

5.1.1

Stand-by Mode and Device Wake-up Mechanisms

Stand-by mode is entered as soon as the current sense multiplexer (DCR.MUX) is in default (stand-by) position,

the PWM start bit is reset (PCR.PST = 0b) and all input pins are not set. All error latches are cleared automatically

in stand-by mode. As soon as stand-by mode is entered, register HWCR.STB is set. To wake-up the device, the

current sense multiplexer (DCR.MUX) is programmed different to default (stand-by) position or the PWM start bit

is set (PCR.PST = 1b). The power-on wake up time tWU(PO) has to be considered for both cases.

Idle mode parameters are valid, when all channels are switched off, but the current sense multiplexer is not in

default position, and VDD supply is available.

Note: A transition from operation to stand-by mode does not reset the SPI registers. So, if

DD is present and SPI

is programmed, a changing to MUX = 111b does not reset the SPI registers. An activation of the channels via

the input pin INx will wake up the device with the former SPI register settings.

Power Supply Modes

Off

SPI

Reset Off

On via

INx

Limp Home

mode

without SPI

Normal

operation

Limp Home

mode with

SPI 1)

1) SPI read only

13.5 V 13.5V 13.5 V

13.5V

13.5 V

5 V

LHI

0 V5 V

0 V

5 V

0 V

5 V

Power stage, protection –

–

✓2)

2) Channel 1, 2 and/or 3 activated according to the state of INx

✓2)

✓✓2)

Limp home

–

✓

–

✓

SPI (logic)

–

✓✓

reset

✓

reset3)

3) SPI reset only with applied

BB voltage

Stand-by current

–

✓✓4)

4) When INx = low

–

✓5)

5) When DCR.MUX = 111b, INx = low and PCR.PST = 0b

–

Idle current

–

––

–

✓6)

6) When all channels are in OFF-state and DCR.MUX

≠ 111

–

Diagnosis

–

✓✓7)

7) Current sense disabled in limp home mode

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