PICOLAS PL-TEC-2-1024 Bedienungsanleitung
User
UserUser
User Manual
Manual Manual
Manual
Rev.
Rev. Rev.
Rev. 11
1111
11.
..
.10
1010
10
PL
PLPL
PL-
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-TEC
TECTEC
TEC-
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-2
22
2-
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-1024
10241024
1024
2
Table of Contents
PL-TEC-2-1024............................................................................................................................ 1
Table of Contents ....................................................................................................................... 2
Description of Connections......................................................................................................... 3
How to get started wit an PLB-21 ............................................................................................. 7
How to get started wit out an PLB-21........................................................................................ 7
Dos and Don’ts........................................................................................................................... 8
Absolute Maximum Ratings ........................................................................................................ 8
Functional Description ................................................................................................................ 9
Power Supply............................................................................................................................ 10
Cooling..................................................................................................................................... 10
Over Temperature S utdown.................................................................................................... 10
Mec anical Dimensions ............................................................................................................ 11
Power on self test ..................................................................................................................... 12
Controlling t e driver................................................................................................................ 12
Controlling t e driver using a PLB-21........................................................................................ 13
Controlling t e driver via PC ..................................................................................................... 16
Register description .................................................................................................................. 30
3
Description of Connections
T e following drawing s ows all connections w ic are available to t e user.
VCC Supply voltage 12..48V, 50 V max.
GND Supply ground
LD+ Positive laser diode output (anode). Use bot connectors parallel for ig
currents.
LD- Negative laser diode output (cat ode). Do not connect to ground! Use bot
connectors parallel for ig currents.
LDP-C BOB Conn Mini-MOLEX Connector for Analogue/TTL-Control of t e driver (see below)
RS232/PLB21-Conn Mini-MOLEX Connector for RS232 Communication or PLB21 (see below)
VCC
GND
TEC connector
screw terminals
(refer to table)
Switc
(s own in upper
position)
4 Holes for
Heatsink
(3.1 mm troug )
LDP
-
C
-
BOB
-
Connector (Pin 1 marked)
RS232 / PLB
-
Conn.
(Pin 1 marked)
NTC and
PT100
connectors
(see table)
4
For a more convenient use of t e driver (e.g. in laboratory use) we recommend t e
optional available product accessory LDP-C-BOB. Please see LDP-C-BOB manual for
furt er details.
Pin-Assignments and Description of t e MOLEX-Pin eaders. T e pictures are in t e
same view t an t e overview picture.
Pin Number Description Direction Comments
1 (Marked in red) reserved Do not connect!
2 reserved Do not connect!
3 reserved Do not connect!
4 ENABLE Input 0V = disabled, 3,3 V = driver enabled
5 TEC_OK Output 0V = Pulser not ok or
oror
or power up self test not
passed yet; 3,3V = Pulser ok / test passed
6 GND Output
7 reserved
8 (rig t) GND Output Do not connect!
Pin Number Description Direction Comments
1 (Marked in red) +12 V Output Only for t e use wit t e PLB21, prevent any
overload or s ort ! (Max 100 mA)
2 TXD I/O RS232-Standard serial interface
3 RXD I/O RS232-Standard serial interface
4 (rig t) GND Output
5
Pin-Assignments and Description of t e T ermistor-Pin eaders. T e pictures are in t e
same view t an t e overview picture.
Warning: For improved EMI noise immunity t e leads of t e t ermistors must be kept
floating. T e GND-Pins of t e PT100 can be used for s ielding. S ielding
must be kept single ended, too.
Remark: T e targeted value for t e NTC is 10k (Factory set). If you need 1k NTCs or a
low temperature, switc from 10k to 1k via software command.
Single C annel operation
Switc in lower position
Dual C annel
Operation
Switc in s own position
NTC C - 1
NTC C - 1
C annel 1
NTC 10 k / 1 k NTC C - 1 Return
NTC C - 1 Return
No function,
do not connect
NTC C - 2 Return
C annel 2
NTC 10k / 1k No function
NTC C - 2
PT100-C 1
PT100-C 1
C annel 1
PT 100
PT100-C 1 Return (GND)
PT100-C 1 Return (GND)
No function (GND)
PT100-C 2 Return (GND)
C annel 2
PT 100 No function
PT100-C 2
6
Pin-Assignments and Description of t e TEC srew terminals. T e pictures are in t e
same view t an t e overview picture.
Picture of t e pcb in same position as in main
overview
Output
name
Dual C annel
operation
Switc in
s own position
Single
C annel
operation
Switc in
lower
position
D
GND
TEC - 2
C
TEC
B
GND
TEC- 1
A
Remark: T e polarity of t e TEC cannot be c anged by software command. T erefore, if t e TEC eats
or cools uncontrollable, t e polarity as to be c anged manually.
Remark: If t e switc is altered during power-on t e TEC will s utdown itself until t e power is
toggled.
Warning: For single c annel operation t e user must connect Output A wit B and C wit D as s own.
7
How to get started with an PLB-21
S ep # W at to do Note
1 Unpack your Device.
2 Connect t e PLB-21 Use PLB-21 Pin eader and special cable
3 Apply t e supply voltage. Apply any voltage between 12 V and 48
V at “VCC” wit respect to GND.
4 Wait until “pulser-ok” is ig Pin 5 wit respect to Pin 6 must turn from
0V to 3.3 V
5 Apply t e temperature setpoint Use t e PLB-21 to adjust t e setpoint
temperature by turning t e dial
6 Set enable pin “ ig ”. Apply 3.3 V to pin 4 of t e BOB
connector. T e current will start up now.
7 C eck If t e Driver is not proper cooled, it will
s ut down.
How to get started without an PLB-21
Remark: T e temperature setpoints can not be applied analogue. However t e usage of t e driver
wit out any digital interface (RS232 via PC or PLB21) is possible w en all necessary settings
ave been done previously.
8
Dos and Don’ts
Never make a s ort at t e output. T is will not do any arm to t e laser driver but will yield in an
incorrect current measurement.
Mount t e driver on an appropriate eat sink. T e driver will s ut down under over temperature
circumstances. Depending on t e desired current a slig t airflow across t e black coils on top is
necessary. Please keep t e temperature of t ese devices below 85°C
Never connect eit er of t e TEC Outputs to GND / VCC as t e polarity of t e output clamps
c anges w en t e TEC switc es from eating to cooling or from cooling to eating.
Absolute aximum Ratings
Supply voltage range: +12 V ... +50 V max during operation. Destroying limit: 56 V
Maximum input current: 20 A
Maximum TEC output current in single c annel mode: 10 A
Maximum TEC output current in dual c annel mode: 5 A
BOB-connector input and output voltages: 0 V to 3.3 V (Terminals are 5 V proof)
BOB-connector output currents: 1 mA
Auxiliary 3.3 V supply voltage output current: 30 mA (Pin 8 of BOB-Conn planned for Rev 2.1)
Auxiliary 12 V supply voltage output current: 100 mA (Pin1 of PLB-21 Conn)
Operating temperature: 0 - 55 °C
9
Functional Description
T e PL-TEC operating principle is based on t e LDP-CW 2050. LDP-CW operates wit four parallel
buck converters (S1, S2, D1, D2, L1; S3, S4, D3, D4, L2; S5, S6, D5, D6, L3; S7, S8, D7, D8, L4). Every
single converter as an independent control loop wit a current sensor (Imeas1, Imeas2, Imeas3 and
Imeas4). T e set point current t at is pretended by t e user is evenly spread over all four converters.
Several security features protect t e laser diode and LDP-CW from damage. D8 protects t e laser
diode from reverse currents w ile D7 protects t e driver in case of a load failure. In case of a failure,
t e control unit disables t e LDP-CW. A soft-start mec anism slowly raises t e current after enabling
t e LDP-CW.
In contrary to t e LDP-CW 2050 all 4 c annels are linked to separate screw terminals. Furt ermore
t ey are terminated wit an RC-Filter to reduce t e EMI noise on t e TEC.
Operation Principle of LDP-CW 20 50 driver
Elemen Func ion
S1, S2, S3, S4, S5, S6, S7, S8,
D1, D2, D3, D4, D5, D6, D7,
D8, L1, L2, L3, L4
Buck Converter
C0 Input Buffer Capacitor
D7, D8 Free w eeling and driver protection diodes
10
Power Supply
T e power supply must be able to cover t e output power plus t e internal power losses (refer to next
c apter). Example: You ave a 48 V power supply. T e maximum TEC power will be 240 W at 6 A. T e total
power consumption will be: 240 W + 12 W = 252 W. Divided by 48 V t is yields 5.25 A (better 6 A) of
current consumption at t e DC-Terminals.
Cooling
T e driver produces up to 31 W of losses. T us t e base plate as to be mounted on a eat sink to
ensure proper operation and prevent an over temperature s utdown. If working wit ig currents
above 5 A it is recommended to cool t e power inductors as well. T is can be ac ieved easily by
placing t e pulser wit its eat sink in t e air flow of a fan.
Power dissipation vs. LD-current
0
5
10
15
20
25
30
35
1 1,5 2 2,5 3 3,5 4 4,5 5 5,5 6 6,5 7 7,5 8 8,5 9 9,5 10
Iout in A
Losses in W
Power dissipation over output current
Power dissipation over output currentPower dissipation over output current
Power dissipation over output current
Over Temperature Shutdown
To protect itself, t e LDP-CW automatically s uts down itself if its temperature rises above 80°C. T is
condition is latc ed and t e appropriate bit in t e ERROR register is set. To re- enable t e LDP-CW t e
ENABLE pin must be toggled.
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