英飞凌电源管理PMIC的安全应用

1

BSG

Boost driver ground:Connect this pin to ground at the low side of an external current sense resistor todecouple the driver noise from the sensitive ground. If step up pre regulator optionis not used, connect to ground.

2

VST

Supply voltage standby regulator, input:Connect this input to supply (battery) voltage with reverse protection diode andcapacitor between pin and ground. An EMC filter is recommended.

3

ENA

Enable Input:A positive edge signal at this pin will wake the device. In case of not used connectto ground.

4

WAK

Wake/Inhibit Input:A high level signal of defined length at this pin will wake the device. In case of notused, connect to ground

5

QST

Output standby LDO:Connect a capacitor as close as possible to pin.

6

AG1

Analogue ground, pin 1:Connect this pin directly (low ohmic and low inductive) to ground.

7

AG2

Analogue ground, pin 2:Connect this pin directly (low ohmic and low inductive) to ground.

8

AGS1

Analogue ground, safety, pin 1:Connect this pin directly (low ohmic and low inductive) to ground.In case a safety switch is used, connect directly to the source of the NMOS used.

9

AGS2

Analogue ground, safety, pin 2:Connect this pin directly (low ohmic and low inductive) to ground.In case a safety switch is used, connect directly to the source of the NMOS used.

10

SS2

Safe state signal 2:Safe state output signal 2, sets the application into a safe state. Signal is delayed against SS1, delay can be adjusted via SPI command.

11

SS1

Safe state signal 1:Safe state output signal 1, sets the application into a safe state.

12

SDI

Serial peripheral interface, signal data input:SPI signalling port, connect to SPI port “data output” of micro processor to receive commands during SPI communication.

13

SDO

Serial peripheral interface, signal data output:SPI signalling port, connect to SPI port “data input” of micro processor to sendstatus information during SPI communication.

14

SCL

Serial peripheral interface, signal clock:SPI signalling port, connect to SPI port “clock” of micro processor to clock thedevice for SPI communication.

15

SCS

Serial peripheral interface, signal chip select:SPI signalling port, connect to SPI port “chip select” of micro processor to addressthe device for SPI communication.

16

WDI

Watchdog input, trigger signal:Input for trigger signal, connect the “trigger signal output” of the micro processor tothis pin. In case of not used, leave open (internal pull-down).

17

ROT

Reset output:Open drain structure with internal pull-up current source. A low signal at this pin indicates a reset event.

18

INT

Interrupt signal:Push-pull-stage. A low pulse at this pin indicates an interrupt, the micro processor shall read out the SPI status registers. Connect to a non maskable interrupt port (NMI) of the micro processor core supply voltage.

19

SYN

Synchronization output signal:Connect this output to the optional external switch mode post regulatorsynchronization input. The signal delivers the step down regulator switchingfrequency either in phase or shifted by 180° (selectable via SPI command). The switch mode post regulator shall synchronize to the rising edge. If not used, leave open.

20

ERR

Error signal input:Input for error signal from micro processor safety managing unit (SMU, internalfailure detection of the micro processor). Connect the “error signal output” of themicro processor to this pin.

21

EVC

Enable external post regulator for core supply:Connect this pin to the enable input of the external post regulator. If not used, leaveopen.

22

MPS

Microcontroller programming support pin:Pull down this pin to ground for operation. Optionally, this pin can be used formicrocontroller debugging and programming purposes. For details please refer toChapter 11.7.

23

SEC

Configuration pin for external post regulator for core supply:Connect this pin to ground if the option external post regulator is not used. If theoption external post regulator is used, leave open.

24

FRE

Frequency adjustment pin:Connect pin to ground for low frequency range or leave open for high frequencyrange.

25

STU

Configuration pin for step up converter:Connect this pin to ground if the option step up pre regulator is not used. If theoption step up pre regulator is used, leave open.

26

VCI

Input for optional external post regulator output voltage (core supply):Connect an external resistor divider to adjust the over and under voltagethresholds of reset output signal ROT.If the option external post regulator is not used, leave open.

27

GST

Gate stress pin:Not for customer use. Connect this pin directly (low ohmic and low inductive) toground.

28

AG3

Analogue ground, pin 3:Connect this pin directly (low ohmic and low inductive) to ground.

29

QVR

Output voltage reference:Connect a capacitor as close as possible to pin.

30

QUC

Output LDO_uC supply (micro processor supply):Connect a capacitor as close as possible to pin.

31

QCO

Output LDO_communication supply:Connect a capacitor as close as possible to pin.

32

QT2

Output tracker 2:Connect a capacitor as close as possible to pin.

33

QT1

Output tracker 1:Connect a capacitor as close as possible to pin.

34

N.C.

Internally not connected:This pin is electrically not connected internally and can be kept open/floating,connected to GND or any other signal. Consider neighboring signals for potentialfailures.

20

ERR

Error signal input:Input for error signal from micro processor safety managing unit (SMU, internalfailure detection of the micro processor). Connect the “error signal output” of themicro processor to this pin.

21

EVC

Enable external post regulator for core supply:Connect this pin to the enable input of the external post regulator. If not used, leaveopen.

22

MPS

Microcontroller programming support pin:Pull down this pin to ground for operation. Optionally, this pin can be used formicrocontroller debugging and programming purposes. For details please refer toChapter 11.7.

23

SEC

Configuration pin for external post regulator for core supply:Connect this pin to ground if the option external post regulator is not used. If theoption external post regulator is used, leave open.

24

FRE

Frequency adjustment pin:Connect pin to ground for low frequency range or leave open for high frequencyrange.

25

STU

Configuration pin for step up converter:Connect this pin to ground if the option step up pre regulator is not used. If theoption step up pre regulator is used, leave open.

26

VCI

Input for optional external post regulator output voltage (core supply):Connect an external resistor divider to adjust the over and under voltagethresholds of reset output signal ROT.If the option external post regulator is not used, leave open.

27

GST

Gate stress pin:Not for customer use. Connect this pin directly (low ohmic and low inductive) toground.

28

AG3

Analogue ground, pin 3:Connect this pin directly (low ohmic and low inductive) to ground.

29

QVR

Output voltage reference:Connect a capacitor as close as possible to pin.

30

QUC

Output LDO_uC supply (micro processor supply):Connect a capacitor as close as possible to pin.

31

QCO

Output LDO_communication supply:Connect a capacitor as close as possible to pin.

32

QT2

Output tracker 2:Connect a capacitor as close as possible to pin.

33

QT1

Output tracker 1:Connect a capacitor as close as possible to pin.

34

N.C.

Internally not connected:This pin is electrically not connected internally and can be kept open/floating,connected to GND or any other signal. Consider neighboring signals for potentialfailures.

46

DRG

Driver output for external step up regulator power stage, connect to gate:Gate of low side switch of step up pre regulator: Connect to the gate of an externalN-channel mosfet, line to be straight and as short as possible. If step up preregulator option is not used, leave open.

47

RSH

Sense resistor for external step up regulator power stage, high side:Connect this pin to the high side of an external current sense resistor to determinethe maximum current threshold through the external N-channel mosfet. If step uppre regulator option is not used, connect to ground.

48

RSL

Sense resistor for external step up regulator power stage, low side:Connect this pin to the low side of an external current sense resistor to determinethe maximum current threshold through the external N-channel mosfet. If step uppre regulator option is not used, connect to ground.

EP1

Edge pin no 1:Keep area below this pin free of ground or other signals, do not solder this pin toground or any other signal. This pin must be kept free of soldering.

EP2

Edge pin no 2:Keep area below this pin free of ground or other signals, do not solder this pin toground or any other signal. This pin must be kept free of soldering.

EP3

Edge pin no 3:Keep area below this pin free of ground or other signals, do not solder this pin toground or any other signal. This pin must be kept free of soldering.

EP4

Edge pin no 4:Keep area below this pin free of ground or other signals, do not solder this pin toground or any other signal. This pin must be kept free of soldering.

Cooling Tab

GND

Cooling Tab.Connect externally to GND and heat sink area.