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TM
DATA SHEET SUBMINIATURE PROPORTIONALLY CONTROLLED HEATER
GENERAL DESCRIPTION
DN510
HEATER BLOCK DIAGRAM 1
CONTROL CIRCUIT TEMP. SENSOR HEATER
The DN510 is a subminiature proportionally controlled heater, whose temperature can be programmed with a single external resistor. This device is ideally suited for regulating the temperature of sensitive electronic components such as fiber optic components and crystal oscillators. The DN510 is in a ceramic package and can supply up to 14 watts of power from an unregulated power supply.
FEATURES * * * * BERYLLIA BASE FOR GOOD THERMAL CONDUCTION REGULATION TEMPERATURE FROM 5C ABOVE AMBIENT TO 100C 28 TO 50 VOLT OPERATION ELECTRICALLY ISOLATED FROM THE CASE
VDD +
4 R
TEMP. SET
C
COM.
2
3
MAXIMUM RATINGS Rating Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VDD PD Tmax T min Value 50 16 120 -65 to +150 Unit VDC Watts oC o C
OUTLINE DIMENSIONS
0.025"
Heater surface
0.110" 0.340" 0.480"
PIN 1 2
Therm Optics DN510
4
0.275"
xxxx
3
OPERATING CHARACTERISTICS Characteristic Supply Voltage (Pin 1 to Pin 4) Steady State Supply Current @ VDD = +48 VDC _ V Temperature Variation over Operating Voltage Symbol VDD I S T V TL C C TA + 5 0 120 14 Min +28 5.0 Max +50 350 2 6 100 Unit VDC mADC o C
The DN510 electrical output pads are Pd-Pt-Ag and can be soldered. The solder used, such as SN-62, should contain silver to prevent leaching of the pads from the substrate.
0.010" 0.060"
Temperature Variation with Load Control Temperature Range Control Resistor Value Pin 2 to Pin 3 (See Figure 1) Maximum Control Temperature when RC = 0 Ohms Turn on power at start-up @ VDD = + 48Volts
o C o C
Tmax PD
_ V
T R
o C
Pad size is 0.060" x 0.107" (four places)
0.107"
0.041"
0.107"
0.010"
Watts
TM
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DN510
Heater Temperature vs Temperature Set Resistor
T C 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 RS K 360.1 340.6 322.3 305.0 288.7 273.4 259.0 245.4 232.5 220.4 209.0 198.3 188.1 178.5 169.4 160.8 152.7 145.1 137.8 131.0 124.5 118.3 112.5 107.0 101.8 96.9 92.2 87.8 83.6 T C 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 RS K 79.6 75.8 72.2 68.8 65.5 62.5 59.5 56.8 54.1 51.6 49.2 46.9 44.8 42.7 40.7 38.9 37.1 35.4 33.8 32.3 30.8 29.4 28.1 26.8 25.5 24.4 23.2 22.2 21.2 T C 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 RS K 20.2 19.3 18.4 17.5 16.7 15.9 15.2 14.5 13.8 13.2 12.5 11.9 11.4 10.8 10.3 9.8 9.3 8.9 8.4 8.0 7.6 7.2 6.8 6.5 6.1 5.8 5.5 5.2 4.9 T C 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 RS K 4.6 4.4 4.1 3.9 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.68 1.52 1.37 1.23 1.09 0.95 0.82 0.70 0.58 0.46 0.35 0.25 0.14 0.04
MAX. START UP CURRENT VS. SUPPLY VOLTAGE SUPPLY CURRENT (mAMPS) 400 300 200 100 0
MAX. THERMAL POWER AVAILABLE VS. SUPPLY VOLTAGE OUTPUT POWER (WATTS) 16 12 8 4 0 0
FIG. 1
FIG. 2
0
10 20 30 40 SUPPLY VOLTAGE (VOLTS D.C.)
50
10 20 30 40 SUPPLY VOLTAGE (VOLTS D.C.)
50
TYPICAL BASE TEMPERATURE CHANGE WITH POWER DISSIPATION 0 TEMP. CHANGE C -2 -4 -6 -8 0 4 8 12 16 POWER OUTPUT (WATTS)
OPTIONS
1. The DN510 is normally supplied with leads. However, the heater can be supplied without them. The leaded device has #33 insulated magnet wire attached to the solder pads as shown in figure 4. 2. Operating temperature can be set at the factory by soldering a chip resistor between pins 3 and 4. Consult the the factory when specific heater temperatures are required. 3. The DN510 heater can be attached to the device to be heated by Ablefilm 561K thermally conductive adhesive film. A 0.005" thick 0.480" x 0.275" piece of this film is provided with each DN510 heater. FIG. 4 +Vcc COM. 3"
DN510 ACTUAL SIZE
Therm Optics DN510
xxxx
Rc Rc 3" A chip resistor is used to set the temperature of the heater.
FIG. 3
FIG. 5
+Vcc COM.
Therm Optics DN510
xxxx
Device being heated 561K FILM DN510 heater Force Clamp the device being heated and the DN510 heater togeather with the thermally conductive preform in between.
INSTRUCTIONS FOR APPLICATION OF THE FILM 1. Place precut adhesive film between clean surfaces to be bonded. 2. Assemble components. Apply spring loaded clamp or dead weight to provide continuous pressure of at least one psi during the cure cycle. 3. Place assembly in a preheated oven and cure at one of the following schedules: 1/2 hr @ 150C 2 hrs @ 125C
The base material of the DN510 is Beryllia which provides efficient energy transfer from the heating element located inside the heater and the heating surface of the DN510. The temperature drop across the Beryllia substrate, as a function of power transfer, is shown in figure 3. The thermal interface between the DN510 heater and the device being heated causes a temperature drop. Care should be taken to make sure that a good thermal interface exists between the two surfaces. NOTES:
Force FIG. 7
APPLICATIONS
Applications for the DN510 are to regulate the temperature of sensitive electronic components. One such application is employing the DN510 as the temperature controlling element in an oven controlled crystal oscillator. This application is illustrated in figure 8. When using the DN510, care should be taken to thermally insulate the composite heater and the electronics package being heated from the surrounding environment. This will minimize the amount of power required to heat the package which in turn will reduce the temperature variation of the package over the ambient temperature extremes . OVEN CONTROLLED CRYSTAL OSCILLATOR APPLICATION USING THE DN510 HEATER
INSULATING SHELL
OSCILLATOR
DN510 HEATER
PRINTED CIRCUIT BOARD
FIG. 7
1. All DN510 heaters are tested for gross leaks in Fluorocabon at 125C. 2. Do not reverse the voltage polarity on the input power leads. This can cause permanent damage to the device.
TM
Last Updated 6/25/01
1004 Mallory Way *Carson City, NV 89701 *Phone: 775-882-7721 * Fax: 775-882-7675 *E-mail: info@thermoptics.com * http://www.thermoptics.com
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