Laser diode driver
Features
- Low current ripple
- No need to adjust voltage
- Soft-start
- Adjustable current limit
- Thermal warning and shutdown
- Reverse current protection
- Crowbar circuit protection
- Universal controls
- NTC thermistor input
- Own software
Applications
- Supplying laser diodes, bars and arrays
- Supplying high power LED arrays
Description
The SF6090 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, softstart, thermal warning and shutdown, reverse current protection and crowbar circuit protection. This means the SF6090 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. SF6090 is available in thermal enhanced half-brick package with aluminum base plate to aid thermal dissipation. Driver can be mounted on any thermal conductive surface enough to dissipate driver losses.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT
Output voltage (Vout)
1
0 75*Vin
V
Output current (Iout)
0
100
A
Current ripple
20
50
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 = 100A
800
900
1200
us
Iout = 50A
700
800
1000
us
Fall-time (Stop time)
1000
1500
1800
us
Error-triggered fall-time (Stop time)
3
40
60
us
Output capacitance
150
uF
INPUT
Vin quiescent current
60
80
100
mA
Input capacitance
2300
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
20
A/V
Current set step
Set by RS-232 or UART
0.03
A
Current set accuracy1
30A < Iout < 75A
+/- 5
%
75A < Iout < 100A
+/- 1
%
Current set calibration
- 5
+ 5
%
AUX SUPPLY
+/- 15V accuracy
Load regulation
+/- 8
%
+/- 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
20
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 = 12V, Iout = 100A
30
45
50
W
Crowbar clamp resistance
2.3
2.8
mΩ
Crowbar clamp response time
100
200
ns
Over-temperature warning
threshold temp
67
°C
Over-temperature warning
hysteresis
2
°C
Over-temperature shut down threshold temp
80
°C
Over-temperature shut down hysteresis
10
°C
Typical Performance Characteristics
Mechanical dimensions
描述 [描述] CW/QCW 100А 10V