4-2

FIGURE 1. HIGH SPEED LASER DRIVER FUNCTIONAL BLOCK DIAGRAM SHOWN IN QUIESCENT P.S. CURRENT TEST MODE

+

-

RELAY1

TEC

AND

OVER/UNDER

TEC P.S.

3V

X10

LASER

THERM.

COMP

SAMPLE/HOLD

SYSTEM

+

-

+

-

OC2

LASER_ON2B

O. C.

COMP.

V9P

LASER P.S.

RLY_OUT

RLY_IN

VUP2

SG_2

VLOW2

GNDA2

GNDD2

CC2

XTEN2+

XTEN2-

TECFB2

TECREF2

TECGDR2

TRES2

OT2

A3

A2

A1

A0

OUT

TECREFR

DIAG

RESETB

DIAGINB

NULLB

SB_H

INVERT

ESD

LASERPS-1

ESD

SHUNT

DRAIN-1

GND

GND

ESD

LASER

ESD

SHUNT

DRAIN-2

ESD

LASERPS-2

LASER

GATE

DRIVE

9V REG.

V/I REF.

V9P

OC1

VUP1

SG_1

VLOW1

GNDA1

GNDD1

CC1

XTEN1+

XTEN1-

CTC2-10K

CTC1-27K

TECFB1

TECREF1

TECGDR1

TRES1

OT1

LASER_ON1B

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

NC

24

25

26

27

29

30

31

32

33

35

37

38

39

40

NC 28

NC

34

41

42

44

45

46

47

48

49

50

NC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

LASER DRIVER-1

LASER DRIVER-2

TEC DRIVER

(THERMO

ELECTRIC

COOLER

43

+5V

-5V

1

µF

1

µF

1

µF

0.25

Ω

+12V

1

µF

3 TO 5V

1

µF

(THERMO-RESISTOR

SENSES LASER TEMP.,

NEG. TEMP. COEF.,

(TEMP. REF.

RESISTOR)

CTC2-10K

CTC2-27K

0.02

µF

0.1

µF

X

X

A1

A2

A3

A4

A5

A6

Q1

Q2

Q3

11k

Ω

11k

Ω

36

+9V

1k

Ω

ON/OFF

0.1

µF

OTA GATE

DRIVE AMP.

CURRENT

MONITOR

AMP.

+

-

5 - 10k

Ω

COMPARATOR

TEMPERATURE

LD2

LD1

ESDD2

ESDD1

PU = 60k

Ω PULLUP RESISTOR

PU

PU

PU

PD

PD

PU

PU

PU

PU

PU

PU

PD

PD = 60k

Ω PULLDOWN RESISTOR

TO GND

= SCHMITT TRIGGER HYSTERESIS

NOTE:

RFD3055

OR

EQUIV.

1.9V

CIRCUIT)

TEC COOLS LASER.)

HIP9022