User Manual - Schulz Electronic GmbH
Contents
1. 20 2 0 18 1 6 1 4 12 1 0 0 8 0 6 0 4 0 2 0 0 Monitor Voltage in V B 4500 B 3988 B 3380 0 5 10 15 20 25 30 35 40 45 50 Temperature in Fig 5 Monitor voltage for different B values of 10kR NTC Resistors Setting TEC Voltage and Current Limits TEC voltage and current limits are adjusted by connecting a resistor between ground and the corresponding pin of the PL TEC 1 0305 The following table shows the relation between the resistor value and the voltage current limit ehs o e en 150 2 28 Table 1 Resistor values for TEC current and voltage limits PICOLAS FOCUSSING POWER TO THE POINT PICOLAS FOCUSSING POWER TO THE POINT Tec Current Monitor The current which is driven through the TEC module can be monitored at PIN 5 Itec The output voltage corresponds to the current by hec Ua 1 5 V 0 4 A readout of 1 5 V means zero current 1 9 V 1 0 A pos 0 7 V 2 A neg Accuracy 10 The diagram shows the full trace including the internal offset 3 00 2 00 1 00 0 00 tec inA 1 00 2 00 3 00 U in V mess Fig 6 TEC current monitor output voltage vs TEC current Absolute Maximum Ratings destroying limits All Input Pins must not exceed the2. PIC LAS POVVER User Manual PL TEC 1 0305 PicoLAS GmbH Company for Innovative Power Electronics and Laser Technology Kalserstrasse 100 Distributor 52134 Herzogenrath Rev 14 04 Schulz Y Electronic Schulz Electronic GmbH Dr Rudolf Eberle Stra e 2 D 76534 Baden Baden Fon 49 7223 9636 0 Fax 49 7223 9636 90 vertrieb schulz electronic de www schulz electronic de PiIc LAS FOCUSSING POWER TO THE POINT Table of Contents gg ed EC T030 aaa Pin Assigaments and DESCHPUON ze ee en ne ee ee iio ee ee ne Typical A oo o MUTI eS ON Bro EEE Temperature Setpoint ama MOMO nee ace Setting TEC Voltage and Current Limits nn TEE USE ONTO ee a a LE Absolute Maximum Ratings destroying liMitS cocooocccccnnncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns A A e e O EE EEE NENNE NER EL DEE NER T E NER WEL DEREN EOENEREANEIERR PICOLAS FOCUSSING POWER TO THE POINT Rev 09 02 valid from June 2009 PL TEC 1 0305 Driver for TEC Modules e Bipolar 3A output e lemperature stability up to 0 001 C e Adjustable TEC current and voltage limiting to protect TEC module e Direct TEC temperature control e No additional heat sink required e Low ripple and low noise design e Multiple monitoring outputs Technical Data Output current Bipolar 2 5 A 3A peak Output current limiting range Heating 0 3 A b i Cooling 0 3 A Product Description indepen ciently
3. voltage range below zero GND and beyond VCC VCC Limit 6V Peak TEC Current 4 5 A Max UT OT current 10mA Ref Voltage Current Sink into Pin 100uUA Source 800uA Warranty There are no warranties express or implied including any implied warranty of fitness for a particular purpose nor any IMPLIED WARRANTY OF MERCHANTIBILITY made by PicoLAS GmbH except as follows PicoLAS warrants equipment manufactured by it to be free from defects in materials and or workmanship under conditions of normal use for a period of one year from the date of shipment to the purchaser PicoLAS will repair or replace at PicoLAS option any product manufactured by it which is shown to be defective or fails to perform within specifications within one year from the date of shipment to the purchaser OEM modified and custom items of equipment are similarly warranted for a period of ninety 90 days from date of shipment to the purchaser Equipment claimed to be defective must be returned transportation prepaid to PicoLAS in Aachen Germany within the warranty period Returns must be preauthorized by contact with PicoLAS customer service department Returns without an RMA Number and or incorrect RMA documentation and or without prepaid transportation will be refused Written documentation of such preauthorization shall be included with the returned item At PicoLAS discretion PicoLAS may elect to repair or replace the equipment claimed to
4. a l external resistor The PL TEC 1 0305 is a very small safe and most Max output voltage 4 3 4 3 V 5V accurate temperature controller for Peltier referred to the supply 2 3 2 3 V 3V thermoelectric cooler TEC modules Output voltage limiting 0 4 3 V by external resistor An ultra low drift chopper amplifier maintains range 0 001 C temperature stability Output current TEC Temperature monitor 026015 0 rather than voltage is directly controlled to Supply voltage 3 5 V single supply eliminate current surges Individual heating and Temperature stability 0 001 K cooling current limits and voltage limits provide Monitor outputs TEC temperature monitor the highest level of TEC protection Over and under The PL TEC 1 0305 operates from a single supply temperature output open collector and provides bipolar 3A output by biasing the TEC current monitor TEG between the outputs of two synchronous Control inputs TEC temperature set point buck regulators True bipolar operation controls enable TTL level temperature without dead zones or other Power Dissipation lt 2 5 W nonlinearities at low load currents The control Dimensions in mm 30x18x7 5 mm system does not hunt when the set point is very DIP 24 6 package close to the natural operating point where only a Weight 8g i small amount of heating or cooling is needed Operating temperature 0104596 An analog control signal precise
5. be defective or refund the original purchase price plus taxes and transportation charges incurred by the purchaser
6. ct operation at least one additional 100k poti for the temperature setpoint is necessary Connect the 5V to Pins 22 23 24 and 18 GND to 1 2 10 and 15 the poti to the Pins 2 3 and 4 the NTC to the Pins 8 and g and finally the TEC to the pins 11 amp 12 vs 13 amp 14 The TEC and NTC are part of the common butterfly package of laser diodes 24 23 22 21 20 19 18 17 16 15 14 13 Fig 1 Minimal operating environment Typical Operating Environment A LL i N T u 24 23 22 21 20 19 18 17 16 15 14 13 N C N C em T setpoint Fig 2 Typical operating environment PICOLAS FOCUSSING POWER TO THE POINT Typically the PL TEC 1 0305 Driver can be operated using the above environment The two resistors connected to Pins 6 and 7 adjust the maximum TEC current and a resistor connected to Pin 17 adjusts the maximum TEC voltage corresponding to table 1 page 7 Pins 20 and 19 are open collector outputs which can be used to drive LEDs to signal a critical over or under temperature condition respectively These diodes have to be an ultra low current type The series resistors limit the current which flows into the Pins to a maximum of 4 mA The voltage applied to pin 3 is adjusting the temperature setpoint However the signal from the NTC is not linear See figure 4 for details The current through the TEC can be monitored at pin 5 Depending on the power supply an additional blocking capacitor Cgjo x may be neces
7. k Resistor So use any resistor to GND to reduce maximum positive current See page 7 for details Maximum Negative TEC Current Connect MAXIN to REF to set default negative current limit 150mV 0 05R 3A This pin is tied to 1 5 V ref by an 47k Resistor So use any resistor to GND to reduce maximum negative current See page 7 for details Connect the NTC between Rth and Rth NTC value must be around 10k NTC return GND Power outlet for the TEC Connect both pins together Power return for the TEC Connect both pins together GND Maximum Bipolar TEC Voltage Internal Resistor divider 47k to 1 5V and 150k to GND provides the maximum voltage across the TEC The maximum TEC voltage is four times the voltage on this pin Connect any Resistor to GND to reduce MaxV TEC Voltage See page 7 for details Enable Input Tie to Vcc to enable unit a connection to GND will disable the unit No internal pullup resistor Over Temperature Alarm Open drain output pulls low if temperature feedback rises 20mV typically 1 5 C above the set point voltage Typ sinking current 4 mA Under Temperature Alarm Open drain output pulls low if temperature feedback falls 2omV typically 1 5 C below the set point voltage Typ sinking current 4 mA NTC temperature monitor output o 3 V See page 6 for details Supply Voltage input single Supply 3 to 5 V 4 PICOLAS FOCUSSING POWER TO THE POINT Minimal Operating Environment For corre
8. ly setsthe TEC nee temperature The actual TEC temperature and current can be monitored via analog outputs In addition separate over and under temperature outputs indicate when the TEC temperature is out of range An on chip voltage reference provides bias for a thermistor bridge Through the new efficient design the PL TEC 1 0305 itself requires no heat sink or other cooling method to reach its full output power Optional Accessories PL TEC BOB PICeLAS FOCUSSING POWER TO THE POINT Pin Assignments and Description Pin 1 2 3 WI 00 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Short Desc GND FB REF Itec MaxIP MaxIN Rth Rth GND Tec Tec N G U 5 En MaxV Shdn JOT IUT Tntc Vcc PIN 24 PIN 23 PIN 22 PIN 21 PIN 20 PIN 19 PIN 18 PIN 17 PIN 16 PIN 15 PIN 14 PIN 13 PIN 1 PIN2 PIN3 PIN4 PINS PING PIN7 PIN 8 PIN 9 PIN 10PIN 11PIN 12 Description GND Feedback Voltage input thermal setpoint analog Voltage o 1 5 V in See page 6 for details 1 500 V Reference Voltage output Max load 50 uA gt 36k to GND Tec Current monitor output The output voltage corresponds to the current by kec Ua 1 5 V 0 4 A readout of 1 5 V means zero current 1 9 V 1 0A pos 0 7 V 2 A neg Accuracy 10 Maximum Positive TEC Current Connect MAXIP to REF to set default positive current limit 150mV 0 05R 3 A This pin is tied to 1 5 V ref by an 47
9. sary Wheatstone Bridge For improved temperature stability the reference network and the feedback network are linked to the same reference voltage However this yields in a full Wheatstone bridge Any influence on the reference voltage will have the same effect on the measured temperature and the setpoint 4 1 5 V mms a th Y 3 en ZZ 10K u 8 T NTC 10 K 1 2 al Fig 3 Part of Fig 1 Temperature Setpoint and Monitor The temperature setpoint input voltage corresponds to the TEC temperature through the voltage of the NTC The voltage of the NTC again depends on its B value and the temperature Figure 4 shows the correlation between TEC temperature and setpoint voltage for different B values of 10kQ NTCs ds B 4500 B 3988 1 0 B 3380 __ 0 9 gt S 0 8 D amp S 0 7 E O 0 6 D dp 0 5 0 4 0 3 0 2 0 5 10 15 20 25 30 35 40 45 50 Temperature in C PICOLAS FOCUSSING POWER TO THE POINT Fig 4 Setpoint voltage for different B values of 10kR NTC Resistors The temperature monitor is equal to the voltage ofthe NTC but for a better readability the NTC voltage is inverted and amplified The following graph shows the relation between the NTC temperature and the monitor output voltage 3 4 32 3 0 2 8 2 6 2 4
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