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5

LDD P SERIES LASER DIODE DRIVER

ELECTRICAL SPECIFICATIONS

PARAMETER

SYMBOL

LDD200

LDD400

UNIT

NOTE

ABSOLUTE MAXIMUM RATINGS

Supply Voltage

V

DD

+5 to +12.5

VDC

Voltage on Pin 8

Compliance Voltage

V

DD - 1.4

VDC

Output Current

I

LD

200

400

mA

See SOA Chart

Power Dissipation [1]

P

MAX

1

2

W

T

AMBIENT = 25°C

Operating Temperature - Case [1]

T

OPR

0 to +50

°C

T

AMBIENT = 25°C

Storage Temperature

T

STG

-40 to +125

°C

Weight

< 1

oz

Soldering Temperature [2]

260°C (10 secs)

[1]

Maximum Operating Power derates above 25°C. The online Safe Operating Area (SOA) Chart includes this derating.

www.teamwavelength.com/support/design-tools/soa-ld-calculator/

[2]

Not compatible with aqueous cleaning processes.

PARAMETER

LDD200 xP

LDD400 xP

UNIT

1P

For Laser Type A or B

2P

For Laser Type C

CONSTANT CURRENT CONTROL

Current Limit Range

0 - 200

0 - 400

mA

Temperature Coefficient

< 100

ppm / °C

Long Term Stability, 24 hours [3]

< 50

ppm

Noise and Ripple (RMS) [4]

< 5

μA

MODULATION

Input Impedance

1

MΩ

Depth of Modulation (at 10kHz) [5]

90

%

Bandwidth, small signal sine wave 3dB

2

MHz

Modulation Input Damage Threshold

< -0.5 or > V

DD + 0.5

V

POWER SUPPLY

Supply Quiescent Current

50

mA

Power Up Trip Point [6]

4.9

V

Power Down Trip Point [6]

4.2

V

MONITOR ACCURACY

Setpoint vs. Monitor Accuracy

< 5

%

Warm-up to Rated Accuracy

1

hour

[3]

Stability tests were performed in an ambient air environment.

[4]

Laser diode forward current noise. Test was performed by measuring the AC voltage across a 50Ω metal film resistor in series with a laser diode.

[5]

As square wave modulation frequency increases, the peak-to-peak output amplitude diminishes. For example, these graphs show the waveform shape

at 10Hz and 10kHz. Depth of modulation continues to decrease after 10kHz.

0 mA

Full Current

100% Depth of Modulation

at 10 Hz

100 %

0 %

90% Depth of Modulation

at 10 kHz

90 %

95 %

5 %

[6]

The LDD P Series has internal control circuitry which turns the output on and off depending on the voltage at pin 8. When the voltage reaches the power

up trip point, the module soft starts the laser diode. When the voltage reaches the power down trip point, the module shunts current around the laser

diode, powering it down in a controlled fashion.