MAIMAN ELECTRONICS SF6015 User manual

SF6015
Laser diode driver
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: [email protected]
web site: www.maimanelectronics.com
v2.1.4 ‒ 2020
Your contact:

v2.1.4 ‒ 2020
v2.1.3:
Added paragraphs «Overall dimensions and weight»and «Functional schemes»
v2.1.4:
Paragraph «Warranty», error-triggered fall-time values (Paragraph «Electrical characteristics»),
examples of digital commands, and correction in paragraphs «how to get started»and «Digital control
description (extended)» was added.

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Table of content
1. Features ............................................................................................................................................... 3
2. Applications.......................................................................................................................................... 3
3. Description...........................................................................................................................................3
4. Package set .......................................................................................................................................... 3
5. Overall dimensions and weight ........................................................................................................... 3
6. Absolute maximum ratings..................................................................................................................3
7. Recommended operating conditions .................................................................................................. 4
8. Power supply requirements................................................................................................................. 4
9. Electrical characteristics ...................................................................................................................... 4
10. Typical Performance Characteristics ................................................................................................... 6
11. Functional schemes ............................................................................................................................. 8
12. Pin and terminal functions................................................................................................................... 9
13. Analogue control description ............................................................................................................ 11
14. How to get started ............................................................................................................................. 12
15. Cooling ............................................................................................................................................... 12
16. Internal protections ........................................................................................................................... 12
17. Software............................................................................................................................................. 12
18. Digital control description ................................................................................................................. 12
19. Digital control description (extended)............................................................................................... 17
20. Mechanical dimensions ..................................................................................................................... 20
21. Warranty ............................................................................................................................................ 20

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1. Features
Low current ripple
No need to adjust voltage
Soft-start
Adjustable overcurrent limit
Thermal warning and shutdown
Reverse current protection
Crowbar circuit protection
Universal controls
NTC thermistor input
Own software
2. Applications
Supplying laser diodes, bars and arrays
Supplying high power LED arrays
3. Description
The SF6015 is a non isolated DC/DC SMPS
(POL) with constant current output. Driver
produces high stability and low ripple
current. Protection features include an over
current protection with adjustable limit, soft-
start, thermal warning and shutdown,
reverse current protection and crowbar
circuit protection. This means the SF6015 can
safely drive non linear and current quality
sensitive loads like laser diodes and LEDs.
The driver can be controlled by analogue
or digital signals.
SF6015 is available in thermal enhanced
quarter-brick package with aluminum base
plate to aid thermal dissipation. Driver can be
mounted on any thermal conductive surface
enough to dissipate driver losses.
4. Package set
Driver –1 pcs
50 cm ribbon cable with one 8-pin connector –1 pcs
50 cm ribbon cable with one 14-pin connector –1 pcs
Wires fixing set –1 pcs
Datasheet & User Manual –1 pcs
5. Overall dimensions and weight
The driver has overall dimensions of 57.9 x 36.8 x 15 mm and a weight of 55 g.
6. Absolute maximum ratings*
MIN
MAX
UNIT
Vin+ to Vin-
-0.3
15
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.

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7. Recommended operating conditions
MIN
MAX
UNIT
Input voltage (Vin)
10
14
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
8. Power supply requirements
The driver requires a DC power supply with line regulation ± 1%. The power supply must be able to
cover the driver output power and losses. Nominal input voltage 12V. Recommended power supply:
Mean well HRP-200-12.
9. Electrical characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT
Output voltage (Vout)
1
0.75*Vin
V
Output current (Iout)
0
15
A
Current ripple
12
15
mA
Pulse rate (F)
QCW-mode
0.1
100
Hz
Pulse duration
Set by RS-232 or UART
2
1/F - 2
5000
ms
Set by analogue pin
0.5
1/F
Rise time (Soft-start time)
Iout = 15A
140
400
500
us
Iout = 7,5A
150
400
500
us
Fall-time (Stop time)
250
400
1200
us
Error-triggered fall-time (Stop time)
0.7
15
us
Output capacitance
100
uF
INPUT
Vin quiescent current
Vin = 12V, no AUX load
50
60
70
mA
Input capacitance
350
uF
CONTROLS
Enable pin low threshold
1
V
Enable pin high threshold
2.3
V
Interlock pin threshold
1
V
Interlock pin pull-up resistance
10
kΩ
Current set pin voltage vs. output
current
3
A/V
Current set step
Set by RS-232 or UART
0.01
A
Current set accuracy1
2A < Iout < 5A
+/- 5
%
5A < Iout < 15A
+/- 1
%
Current set calibration
- 5
+ 5
%
1
See more at regulation characteristic (Figure 5).

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AUX SUPPLY
+/- 15V accuracy
+/- 2
%
+/- 15V output current
20
30
mA
5V accuracy
+/- 1.5
%
5V output current
200
300
mA
INTERNAL MEASURMENTS
Internal measurements accuracy
+/-2
%
Current monitor pin voltage vs.
output current
3
A/V
Voltage monitor pin voltage vs.
output voltage
1
V/V
External sensor temperature
NTC 10k
-10
150
°C
POWER DISSIPATION
Driver losses
Vin = 14V, Iout = 15A
4
5
6
W
PROTECTIONS
Crowbar clamp resistance
2.3
2.8
mΩ
Crowbar clamp response time
100
200
ns
Over-temperature warning
threshold temp
60
°C
Over-temperature warning
hysteresis
2
°C
Over-temperature shut down
threshold temp
80
°C
Over-temperature shut down
hysteresis
22
°C

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10. Typical Performance Characteristics
Figure 1 –Power dissipation vs. output current at full load
Figure 2 –Efficiency vs. output current at full load
Figure 3 –Power dissipation vs. output current at light load
Figure 4 –Efficiency vs. output current at light load

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Figure 5 –Regulation characteristic: dotted –ideal, solid –real
3A/div
250us/div
3A/div
500us/div
Figure 6 –Typical start up sequence
Figure 7 –Typical stop sequence

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11. Functional schemes
Analogue interface
Figure 8 –Analog interface functional scheme
Power unit
Figure 9 –Power unit functional scheme

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12. 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!
Terminals
Please, pay attention to the markings!
Terminal
Description
Vin+
Connect to the positive terminal of
the power supply.
Please, note polarity!
Vin-
Connect to the negative terminal of
the power supply.
Please, note polarity!
LD+
Connect to the laser diode anode.
Please note polarity!
Grounding this terminal may cause
permanent damage to the driver.
LD-
Connect to the laser diode cathode.
Please note polarity!
Grounding this terminal may cause
permanent damage to the laser
diode.
Controls
№
Description
1
Analogue control connector
2
Current limit adjustment
potentiometer (adjustment from
zero to maximum occurs in 12 turns)
3
Digital control connector