FL591 datasheet(5/18 Pages) WAVELENGTH

5 / 18 page

www.teamWavelength.com

FL591FL LASER DIODE DRIVER

Table 2. Monitor Transfer Functions

FUNCTION

OUTPUT

CONFIGURATION

TRANSFER

NOTE

Current Output Monitor,

MON1 and IMON2

Separate

0.125 A / V

The voltage on I

MONx is proportional to the current

output on that channel

Current Output Monitor,

MON1 + IMON2

Parallel

When operating the FL591FL as a single channel 500 mA driver,

monitor the output current on both I

MON1 and IMON2. The total output

current monitor voltage is determined by summing the voltage

measured on both monitors, using the equation:

LD = (VIMON1 + VIMON2) * 0.125

Current Limit Monitor,

LIM1 and ILIM2

Separate

0.125 A / V

Adjust I

LIM1 and ILIM2 to set the current limit on each

channel. See

page 9.

Current Limit Monitor, I

LIM1

Parallel

0.250 A / V

Adjust only I

LIM1 to set the current limit when the

FL591FL is operated in parallel-output mode.

See

page 9.

Power Monitor,

MON1 and PMON2

Separate

500 μA / V 1

The voltage on P

MONx is proportional to the

photodiode current on that channel.

Power Monitor, P

MON1

Parallel

500 μA / V 1

When operating the FL591FL as a single channel

500 mA driver, the photodiode current is monitored

on P

MON1.

1. The photodiode feedback transfer function can be changed. See

page 12 for details.

Table 3. Setpoint Transfer Functions

OPERATING

MODE

INPUT

CONFIG.

OUTPUT

CONFIG.

SETTRANSFER

FUNCTION

NOTES

Constant

Current

One

Separate

0.125 A / V

Measure the voltage on the V

SET1 testpoint; adjust the VSET1

trimpot to set the output current on both channels. The V

SET2

trimpot is not used.

Parallel

0.250 A / V

Measure the voltage on the V

SET1 testpoint; adjust the VSET1

trimpot to set the output current on both channels. The V

SET2

trimpot is not used.

Two

Separate

0.125 A / V

Measure the voltage on the V

SET1 and VSET2 testpoints; adjust the

SET1 and VSET2 trimpots to set the output current level for each

channel.

Parallel

0.125 A / V

The V

SET1 and VSET2 voltages drive each channel independently.

The output currents sum. Measure the voltages on the V

SET1

and V

SET2 testpoints separately, and add them to determine the

effective output current.

Constant

Power

One

Separate

500 μA / V 1

Measure the voltage on the V

SET1 testpoint; adjust the VSET1

trimpot to set the photodiode current setpoint. The V

SET2 trimpot is

not used.

Parallel

500 μA / V 1

Measure the voltage on the V

SET1 testpoint; adjust the VSET1

trimpot to set the photodiode current setpoint. The V

SET2 trimpot is

not used.

Two

Separate

500 μA / V 1

Measure the voltage on the V

SET1 and VSET2 testpoints; adjust the

SET1 and VSET2 trimpots to set the photodiode setpoint for each

channel.

Parallel

This configuration is not allowed.

1. The photodiode feedback transfer function can be changed. See

page 12 for details.

FL591 Datasheet(PDF) 5 Page - Wavelength Electronics, Inc.

FL591 Datasheet(HTML) 5 Page - Wavelength Electronics, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Datasheet Download

Link URL