TPS2343

SLUS644B − FEBRUARY 2005 − MAY 2005

3

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SIMPLIFIED BLOCK DIAGRAM

3

2

3VAUXI

To Slot B

+

2.2 V

SQ

Q

R

AUX FAULT

LATCH

2.5 ms

Turn−Off Delay

+

3VAUXA

10 ms

Turn−On Delay

77

PMEA

OVERCURRENT SENSE

63

P12VGA

+

+

66

5VSA

67

5VISA

SQ

Q

R

MAIN

FAULT

LATCH

Thermal

Shutdown

64

P12VINA

62

P12VOA

60

M12VOA

61

M12VINA

OVER−

CURRENT

SENSE

43

42

10

PWRGND1

59

ANAGND2

40

DIGVCC

41

DIGGND1

2.9 V

71

PWRGND2

ALEDENA

47

SWA

23

ANAGND1

25

DIGGND2

+

74

3VSA

75

3VISA

68

VIOSA

69

VIOISA

70

73

3VIOGA

15VIOGA

1

3VAUXGA

56

DIGGND3

Slot A shown

Slot B is identical

+

54

FAULTA

53

48

PWRENA

PLEDENA

50

PCIXCAPA

45

46

PWRLEDA

ATTLEDA

PCIXCAP

Decoder

57

55

51

PCIXCAP1A

PCIXCAP2A

PCIXCAP3A

To Logic

AUXFLTA

78

PMEOA

65

5VGA

22

MISET

100

mA

I−limit

threshold

76

3VGA

44

VIOSELA

49

PWROFFA

52

OUTUVA

P12VOA

5VISA

3VISA

VIOIS

OUTPUTS

LOW

M12VOA

P12VOA

5VISA

3VISA

OUTPUT

UV

In this drawing, circuits related to many functions are oversimplified. See the Application Section of the data

sheet for a more detailed representations of these functions.

Osolete Device