400 hot springs road, carson city nv 89706 ? (775) 883-0820 ? fax (775) 883-0827 ? www.hytek.com ? 33 HY-7110 micro-heater tec controllers laser diode drivers micro-heaters miniature proportionally controlled heater description: the hy7110 is a miniature proportionally controlled heater whose temperature can be programmed with a single exter- nal resistor. this device is ideally suited for regulating the temperature of sensitive electronic components such as mi- crowave filters, optical waveguides, multiplexers and crystal oscillators. the hy7110 in a ceramic package can supply up to 28 watts of power from an unregulated 28 volt supply. operating characteristics: characteristic symbol min max unit supply voltage v dd +8 +35 vdc (pin 1 to pin 2) steady state supply i s 0.015 1.0 adc current @ v dd = +35 vdc temperature variation over ? t v 2c operating voltage temperature variation ? t l 10 c with load control temperature range t c 50 100 c control resistor value r c 0 35k ? pin 3 to pin 4 (see figure 1) maximum control t max 110 c temperature when rc = 0 ? turn on power at start-up p d 25 28 watts @v dd = +28 volts maximum ratings: rating symbol value unit supply voltage v dd 35 vdc reverse voltage v r ?50 vdc power dissipation p d 35 watts operating temperature (case) t max/min 100/?20 c storage temperature range ?65 to +150 c outline dimensions beryllia base two times actual size 0.018" diameter cu with au flash features: ? beryllia base for good thermal conduction ? regulation temperature from 40c to 100c ? electrically isolated from the case ? epoxy sealed ? hermetically sealed and military screened units available
34 ? 400 hot springs road, carson city nv 89706 ? (775) 883-0820 ? fax (775) 883-0827 ? www.hytek.com HY-7110 micro-heater notes: 1. optimum heat transfer between the hy7110 and the device being heated occurs when a thermal compound, such as dow corning 340, is applied to the mounting surface of the heater. 2. operation is possible from 100 c to 120c, however electrical performance is not guaranteed. 3. special environmental and electrical screening is available on request. 4. special custom engineered micro-heater available on request. heater block diagram typical base temperature vs control resistor base temperature c max start-up current vs supply voltage supply current (amps) max thermal power available vs supply voltage output power (watts) typical base temperature loss with power dissipation temperature change c mounting the hy7110 heater thermal compound between surfaces do not overtighten the mounting screws. this may result in breaking the ceramic substrate. #2-56 mounting screws electrical pin not shown for clarity control resistor r c in k ? supply voltage (volts d.c.) supply voltage (volts d.c.) power output (watts) from hy7110
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