HV857K7-G Supertex, HV857K7-G Datasheet
HV857K7-G
Specifications of HV857K7-G
Related parts for HV857K7-G
HV857K7-G Summary of contents
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... IN Low Noise, High Voltage EL Lamp Driver IC General Description The Supertex HV857 is a high voltage driver designed for driving Electroluminescent (EL) lamps square inches. The input supply voltage range is from 1.8 to 5.0V. 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 ± ...
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... Ordering Information Package Options 8-Lead DFN Device 3.00x3.00mm body 0.80mm height (max) 0.65mm pitch HV857 HV857K7-G -G indicates package is RoHS compliant (‘Green’) Absolute Maximum Ratings Parameter Supply voltage Operating temperature Storage temperature DFN-8 power dissipation MSOP-8 power dissipation Output voltage Absolute Maximum Ratings are those values beyond which damage to the device may occur ...
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... Units Conditions 150 µ 1.8 to 5.0V. See Figure See Figure See Figure 1 275 Hz See Figure 1 - kHz See Figure See Figure High Voltage Level Translator Equivalent to 3.0in lamp 2 2.0kΩ 10nF BAS21 5 220µH* 3.3nF, 100V ● Tel: 408-222-8888 ● www.supertex.com HV857 ...
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... Brightness vs Inductor Value IN CS Brightness Iin l 250 300 350 400 Inductor Value (µH) ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 84V 240Hz , V = 3.0V 2.5 3.5 4 450 500 550 600 ● Tel: 408-222-8888 ● www.supertex.com HV857 Brightness 6.0ft-lm 5 ...
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... If the input power is greater than IN IN ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 5 resistor connected between REL-Osc and VDD EL decreases. As the EL lamp frequency increases, EL will decrease. The CS resistor by a factor EL decreases. With a given inductor ● Tel: 408-222-8888 ● www.supertex.com HV857 resistor value SW ...
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... Figure 2: Split Supply and Enable/Disable Configuration Enable Signal DD OFF = 0V Regulated Voltage = Audible Noise Reduction This section describes a method (patented) developed at Supertex to reduce the audible noise emitted by the EL lamps used in application sensitive to audible noise. Figure Figure 3: Typical Application Circuit for Audible Noise Reduction Enable OFF = Enable/Disable Confi ...
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... The noisiest waveform is a square wave and the quietest waveform has been assumed sine wave. After extensive research, Supertex has developed a wave- form that is quieter than a sine wave. The waveform takes the shape of approximately 2RC time constants for rising ...
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... NOM 0.75 0.02 (mm) MAX 0.80 0.05 JEDEC Registration MO-229, Variation WEEC-2, Issue C, Aug. 2003. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. Drawings not to scale. Supertex Doc. #: DSPD-8DFNK73X3P065, Version B101008. E θ Seating Plane A3 Note ...
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... Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship ...