iC-WK, iC-WKL

2.4 V CW LASER DIODE DRIVER

Rev D1, Page 4/8

ELECTRICAL CHARACTERISTICS

Operating Conditions: VCC = 2.4...6 V, RM = 200 Ω...50 kΩ, Tj = -40...125 °C unless otherwise noted

Item

Symbol

Parameter

Conditions

Tj

Fig.

Unit

No.

°C

Min.

Typ.

Max.

Total Device

001

VCC

Permissible Supply Voltage

2.4

6

V

002

I(LDK)m

Permissible Laser Drive Current

(closed control loop)

Tj = -40...125 °C

5

70

mA

Tj = -40...80 °C

5

90

mA

003

Idc(VCC)

Supply Current without load path closed control loop, I(MDK) = 0

2.4

5.5

mA

004

Ioff(VCC)

Supply Current on Reset

2.4

5

mA

005

Ir(VCC)

Reverse Supply Current

RM = 50 kΩ, VCC = -6 V

-6

-3

mA

006

ton()

Turn-on Delay

VCC: 0 → 5 V to 95 % I(LDK),

I(LDK) = I(LDK)m;

CI = 47 nF

70

µs

CI = 100 nF

150

µs

007

Vc()hi

Clamp Voltage hi at

VCC, LDA, MDK

I() = 10 mA, other pins open

6

9

V

008

Vc(LDK)hi Clamp Voltage hi at LDK

V() < VCC + 1 V; I() = 10 mA,

other pins open

6

9

V

009

Vc(MDA)hi Clamp Voltage hi at MDA

I() = 10 mA, other pins open

iC-WKL

6

9

V

iC-WK

1.1

4

V

010

Vc()hi

Clamp Voltage hi at CI

I() = 10 mA, other pins open

1.1

4

V

011

Vc()lo

Clamp Voltage lo at VCC, LDA,

MDK, MDA, CI

I() = -10 mA, other pins open

-9

V

Reference and Monitor Inputs MDA, MDK, AGND

101

V(MDA)

Reference Voltage at MDA

closed control loop,

V(LDK) > Vs(LDK)

480

500

520

mV

102

dV(MDA)

Reference Voltage Temperature

Drift at MDA

see 101;

120

µV/°C

103

Ierr(MDA)

Input Current in MDA

closed control loop, I(MDK) = 0

-300

300

nA

104

dI(MDA)

Input Current Temperature Drift in

MDA

see 103;

-2

2

nA/°C

105

APCerr

Control Error

RM = 10 kΩ, Tj = 0...80 °C

0.3

%

RM = 10 kΩ, Tj = -40...125 °C

1

%

106

dI(MD)

Supply Voltage Suppression of

monitor current

V(VCC): 2.4 → 6 V,

I(LDK) = 70 mA

-1

1

%

107

Rgnd()

Resistor AGND-GND

3

Ω

108

Vf(MDK)

Voltage at MDK

Vf() = V(LDA) − V(MDK);

I(MDK) = 1 µA...1 mA

0.46

2.1

V

109

CR()

Current Ratio I(MDA)/I(MDK)

I(MDK) = 10...500 µA

0.975

1.025

I(MDK) = 500 µA...2.5 mA

0.95

1.05

110

TC()

Current Ratio Temperature

Coefficient I(MDA) / I(MDK)

I(MDK) = 10...500 µA

-0.005

0.005

%/°C

I(MDK) = 500 µA...2.5 mA

-0.025

0.025

%/°C

Laser Drive LDA, LDK

201

Vs(LDK)

Saturation Voltage at LDK

I(LDK) = 40 mA

300

mV

I(LDK) = 70 mA, Tj = -40...125 °C

400

mV

I(LDK) = 90 mA, Tj = -40...80 °C

400

mV

202

dI(MD)

Load Balancing Error

I(LD) = 20 mA,

I(LDK): 20 mA → 70 mA

-1

1

%

203

It(LDK)

Overcurrent Threshold in LDK

Tj = -40...125 °C

70

130

300

mA

Tj = -40...80 °C

90

300

mA

204

toff()

Overcurrent Reset Delay

lack of feedback:

I(RM) = 0 to I(LDK) = It(LDK);

I(LDK) = 20 mA, CI = 47 nF

85

µs

I(LDK) = 20 mA, CI = 100 nF

170

µs

I(LDK) = 60 mA, CI = 47 nF

60

µs

I(LDK) = 60 mA, CI = 100 nF

130

µs

205

Vf()

Diode Forward Voltage LDK-LDA I(LDK) < 70 mA

1.1

V

206

Rvcc()

Transient Protection Resistor

VCC vs. LDA

4

Ω