MAIMAN ELECTRONICS SF8300 User manual

v1.0.1 ‒ 2020
SF8300
Laser Diode Driver with TEC Controller for
Butterfly LD Type 1 Pump
Datasheet & User Manual
Before powering on your driver, read this manual thoroughly.
If you have any doubt or suggestion, please do not hesitate to contact us!
Maiman Electronics LLC, Saint-Petersburg, Russia
e-mail: [e-mail]
web site: www.maimanelectronics.com

v1.0.1 ‒ 2020
v1.0.1:
Paragraph «Warranty», error-triggered fall-time values (Paragraph «Electrical characteristics»),
and examples of digital commands was added.

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Table of content
1. Laser diode driver features.................................................................................................................. 3
2. Applications ......................................................................................................................................... 3
3. TEC controller features ........................................................................................................................ 3
4. Controls................................................................................................................................................ 3
5. Description...........................................................................................................................................3
6. Package set ..........................................................................................................................................3
7. Overall dimensions and weight ...........................................................................................................3
8. Versions ............................................................................................................................................... 4
9. Absolute maximum ratings..................................................................................................................4
10. Recommended operating conditions .................................................................................................. 4
11. Power supply requirements ................................................................................................................ 4
12. Electrical characteristics ...................................................................................................................... 5
13. Typical Performance Characteristics ...................................................................................................6
14. Functional scheme............................................................................................................................... 6
15. Pin and terminal functions ..................................................................................................................7
16. Analogue control description ............................................................................................................ 10
17. Current / Temperature setting variants ............................................................................................ 11
18. How to get started.............................................................................................................................12
19. Cooling ............................................................................................................................................... 13
20. Internal protections ...........................................................................................................................13
21. Software............................................................................................................................................. 14
22. Digital control description .................................................................................................................14
23. Digital control description (extended)............................................................................................... 20
24. Troubleshooting guide.......................................................................................................................23
25. Mechanical dimensions .....................................................................................................................24
26. Warranty............................................................................................................................................ 26

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1. Laser diode driver features
Constant current mode
Low current ripple ≤ 10uA
Current stability 0.1%
No need to adjust voltage
Soft-start
Adjustable current limit
Reverse current protection
Crowbar circuit protection
Own software
2. Applications
Supplying laser diodes in butterfly case
3. TEC controller features
Low current ripple≤2mA
Integrated PID controller, doesn't require
setup
Adjustable TEC output current limit
Working with sensor NTC 10kOhm
Additional NTC thermistor input
4. Controls
Potentiometers on the board
External input
Digital control by RS-232/UART/USB1
5. Description
SF8300 contains a laser diode driver and a temperature controller (TEC).
Laser diode driver is a non isolated low drop out (LDO) regulator with constant current
output. Driver produces high stability and low ripple current.
TEC is a non isolated DC/DC. TEC produces low current ripples. Additional features include an
adjustable TEC output current limit and Integrated self-adjusted PID controller, providing optimal
temperature regulation.
SF8300 can be controlled by analogue or digital signals and switches on the board.
SF8300 is housed in 61 × 101.6 mm package with aluminum base plate to aid thermal
dissipation from laser diode. The laser diode mount is located on the board. Driver can be
mounted on any thermal conductive surface enough to dissipate laser diode losses.
6. Package set
Driver –1 pcs
50 cm ribbon cable with one 8-pin connector –1 pcs
50 cm ribbon cable with one 20-pin connector –1 pcs
Datasheet & User Manual –1 pcs
USB-UART converter –1 pcs (for ZIF versions)
7. Overall dimensions and weight
Device
Overall dimensions, mm
Weight, g
SF8300-10
61 x 101.6 x 18.5
116
SF8300-ZIF10
61 x 101.6 x 28.3
143
SF8300-14
61 x 101.6 x 20
133
SF8300-ZIF14
61 x 101.6 x 28.3
139
1
Option, USB as external adapter

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8. Versions
Device
LDD MAX current, mA
LD mount
LD case
SF8300-10
3000
Soldering
10-pin Type 1
SF8300-ZIF10
3000
Plug-in connector
10-pin Type 1
SF8300-14
3000
Soldering
14-pin Type 1
SF8300-ZIF14
3000
Plug-in connector
14-pin Type 1
9. Absolute maximum ratings
MIN
MAX
UNIT
Vin+ to Vin-
-0.3
5.5
V
Operating temperature
-40
50
°C
Analogue control pins to GND
-0.3
5.5
V
RS-232 RXD to GND
-25
25
V
RS-232 TXD to GND
-13.2
13.2
V
UART RXD to GND
-0.3
5.5
V
UART TXD to GND
-0.3
5.5
V
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to
the device. These are stress ratings only, which do not imply functional operation of the device at
these or any other conditions beyond those indicated under recommended operating conditions.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
10. Recommended operating conditions
MIN
MAX
UNIT
Input voltage (Vin)
4.8
5.2
V
Operating temperature
-10
40
°C
Analogue control pins to GND
0
5
V
RS-232 RXD to GND
-12
12
V
RS-232 TXD to GND
-12
12
V
UART RXD to GND
0
5
V
UART TXD to GND
0
5
V
11. Power supply requirements
The driver requires a 5V DC power supply. The power supply must be able to cover the driver
and TEC output power and losses. The power supply must provide 30W or more and
line regulation ± 1%. Recommended power supply: Mean Well RS-35-5.

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12. Electrical characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT LDD
Output voltage
0.5
3
V
Output current
0
3000
mA
Current ripple
15
30
uA
Pulse rate
Set by RS-232 or UART
0.1
100
Hz
Pulse duration
Set by RS-232 or UART
1
5000
ms
Rise time (Soft-start time)
1200
1400
1800
us
Fall-time (Stop time)
200
300
500
us
Error-triggered fall-time (Stop time)
9
13
29
us
OUTPUT TEC
Output voltage
0
±4
V
Output current
0
±4
A
Current ripple
2
4
mA
Temperature change range
+15
+40
°C
CONTROLS
Enable pins low threshold
1
V
Enable pins high threshold
2.3
V
Interlock pin threshold
1
V
Interlock pin pull-up resistance
10
kΩ
LDD current set pin voltage vs.
output current
1200
mA/V
LDD current set step
Set by RS-232 or UART
0.1
mA
LDD current set accuracy
1
%
LDD current set calibration
-5
+5
%
TEC temperature set step
Set by RS-232 or UART
0.01
°C
TEC temperature set accuracy
1
%
TEC temperature set calibration
-5
+5
%
AUX SUPPLY
2.5V accuracy
0.2
%
2.5V output current
10
mA
INTERNAL MEASURMENTS
Internal measurements accuracy
2
%
LDD current monitor pin voltage vs.
output current
1200
mA/V
External sensor temperature
NTC 10k
-10
150
°C
INPUT
Vin quiescent current
7
10
20
mA
Operating current
8
A

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13. Typical Performance Characteristics
500mA/div
1ms/div
Fig. 1 –Typical start up sequence
Fig. 2 –Typical stop sequence
14. Functional scheme
Analogue interface

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15. Pin and terminal functions
Please, note polarity!
Never ground any lead of the output, this may cause permanent damage to the laser
diode and the driver!
Never use any grounded probes (e.g. from the oscilloscope) at the output!
Control pins are not isolated!
Fig. 3 –Controls
№
Description
1
Digital control connector
2
Laser diode driver overcurrent protection (red) and interlock (yellow) indicators. Lights red
when the protection is activated. To reset, the device must be restarted. Lights yellow when
the driver is in the locked state (see paragraph 18.1).
3
Analogue control connector
4
Current limit adjustment potentiometer. Turning the potentiometer clockwise increases the
value, counterclockwise - reduces. Adjustment from zero to maximum occurs in 12
turns.
5
Terminal for connecting the power supply 5V. Maximum wire cross-section 0.75 mm2.
Please, note polarity!
6
ESD protection LD short. Remove when the laser module is set up!
7
Two-position switch. One switch enables temperature controller (TEC), another switch
enables laser diode driver (DRIVER). Switches are duplicated on the analog control
connector.
8
Current control selector. Close 1-2 to use analog control connector (EXT),
2-3 to use potentiometer (INT).
9
Output current of laser diode driver adjustment potentiometer. Turning the potentiometer
clockwise increases the value, counterclockwise - reduces. Adjustment from zero to
maximum occurs in 12 turns.
10
TEC temperature adjustment potentiometer. Turning the potentiometer clockwise increases
the value, counterclockwise - reduces.
11
The temperature control selector. Close 1-2 to use analog control connector (EXT), 2-3 to
use potentiometer (INT).

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Digital control connector
Wurth WR-MM 690157000872 or TE Connectivity 215083-8
Pin
Description
1
UART RXD
2
RS-232 RXD
3
UART ТXD
4
RS-232 TXD
5
Connected to Vin+
6
Interlock (duplicates pin 15 of analogue
control connector)
7
Crowbar status (duplicates pin 5 of
analogue control connector)
8
GND (connected to Vin- terminal)
Analogue control connector
Wurth WR-MM 690157002072 or TE Connectivity 2-215083-0
PIN
I/O
Name
Description
1
O
+5V
Connected to Vin+.
2
I
TEC Enable
HIGH = operates, LOW = stop. Internally pulled down.
3
I
Laser Driver Enable
HIGH = operates, LOW = stop. Internally pulled down.
4
O
TEC Error
HIGH = fault, LOW = normal operation.
5
O
Laser Driver Overcurrent
HIGH = fault, LOW = normal operation.
6
O
+2.5V
Auxiliary +2.5V power supply.
Up to 10mA output current capability.
7
I
Laser Current Set
0-2.5V = 0-MAX current at the output.
8
GND
9
I
TEC temperature set
0V = 42°C, 2.5V = 16°C.
10
GND
11
O
Driver Current Monitor
0-2.5V = 0-MAX current at the output.
12
GND
13
O
TEC temperature monitor
0V = 42°C, 2.5V = 16°C.
14
GND
15
I
Interlock
Open = locked; Low = operates.
Internally pulled up.
16
GND
17
NTC Interlock
Connect NTC thermistor 10k between this pin and GND.
18
GND
19
Monitor PD Cathode
Connected to pin 4 of Butterfly.
20
Monitor PD Anode
Connected to pin 3 of Butterfly.

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Laser diode pinout
№
Description
№
Description
1
TEC Anode
14
TEC Cathode
2
Thermistor
13
n/c
3
Monitor PD Anode
12
n/c
4
Monitor PD Cathode
11
LD Cathode
5
Thermistor
10
LD Anode
6
n/c
9
n/c
7
n/c
8
n/c