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HV833MG データシート(PDF) 1 Page - Supertex, Inc |
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HV833MG データシート(HTML) 1 Page - Supertex, Inc |
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1 / 9 page  1 HV833 HV833 High Voltage EL Lamp Driver Features ❏ 1.8V to 6.5V operating supply voltage ❏ DC to AC conversion ❏ Separately adjustable lamp and converter frequency ❏ Output voltage regulation ❏ Enable/disable function ❏ Patented output timing for high efficiency ❏ <100nA shutdown current ❏ Split supply capability ❏ LCD backlighting General Description The Supertex HV833 is a high voltage driver designed for driving EL lamps of up to 35nF (10-12in2). The input supply voltage range is from 1.8V to 6.5V. The device uses a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ±90V. The chip can be enabled/disabled by connecting the resistor on R SW-OSC to VDD/ground. The HV833 has two internal oscillators, a switching MOSFET, and a high voltage EL lamp driver. The frequency for the switching MOSFET is set by an external resistor connected between the R SW-osc pin and the supply pin VDD. The EL lamp driver frequency is set by an external resistor connected between R EL-osc pin and the VDD pin. An external inductor is connected between the L X and VDD or VIN pins. A 0.003-0.1µF capacitor is connected between C S and ground. The EL lamp is connected between V A and VB. The switching MOSFET charges the external inductor and discharges it into the capacitor at C S. The voltage at CS will start to increase. Once the voltage at C S reaches a nominal value of 90V, the switching MOSFET is turned OFF to conserve power. The outputs V A and VB are configured as an H bridge and are switching in opposite states to achieve 180V peak-to-peak across the EL lamp. Applications ❏ Portable Transceivers ❏ Remote Control Units ❏ Calculators ❏ PDAs ❏ Global Positioning Systems (GPS) 05/02/02 Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. Demo Kit Available EL Lamp + _ 1 2 3 4 8 6 5 HV833MG 7 VIN VDD RSW-osc REL-osc Gnd LX CS VB VA LX VDD Enable Signal ON=VDD OFF=0 1N914 Cs 100V Typical Application |
同様の部品番号 - HV833MG |
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同様の説明 - HV833MG |
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