HV9903K6-G Supertex, HV9903K6-G Datasheet
HV9903K6-G
Specifications of HV9903K6-G
Related parts for HV9903K6-G
HV9903K6-G Summary of contents
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... Supertex inc. White LED Driver IC General Description The Supertex HV9903 is a fixed frequency DC-DC boost converter designed for driving Light Emitting Diodes (LEDs) with constant current where the light intensity is proportional to the current through them. The input supply voltage range into the device (V lower voltages is possible as long ...
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... Ordering Information 6-Lead DFN 3.00x3.00mm body Device 1.00mm height (max) 0.95mm pitch (punched type) HV9903 HV9903K6-G -G indicates package is RoHS compliant (‘Green’) Absolute Maximum Ratings Parameter voltage SW V SHDN I RSET V RSET Storage temperature range Operating temperature range Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
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... Open LED indicator at RSET pin OPEN I Switch off leakage current SW(OFF) Functional Block Diagram V DD VDD OVP SHDN Note: This drawing is a generalized representation of the HV9903. Actual internal circuitry may differ. Supertex inc. (cont.) = 2.6V, unless otherwise noted.) Min Typ - 5.0 12 ...
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... SHDN for PWM dimming, the PWM dim- ming signal should be fairly low frequency so that the 1.0ms soft-start interval does not introduce much error. The R input is better for PWM dimming does not include soft- start. (See below for PWM dimming techniques.) Supertex inc. Soft Start 50mA/div 10mA/div resistor is ...
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... SW pin. When an inductor saturates, current begins to climb rapidly. This condition is evidenced by a breakpoint in the SW voltage waveform as Supertex inc. indicated in the diagram below. Normally, the voltage at the SW pin should be a fairly linear ramp, as the linear rise in in- ductor current through the SW resistance produces a linear voltage ramp ...
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... LED protection, the diode’s reverse voltage rating should be 25V or more. Otherwise, the diode’s voltage rating should be greater than the LED string’s voltage drop plus 1.0V. Supertex inc. Dimming Dimming may be accomplished in one of two ways: DC dimming or PWM dimming. DC dimming linearly regulates ...
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... PWM SET 100mV 100mV - V 100mV I ≈ 225 LED(avg) R SET DC dimming may be implemented in discrete steps using logic signals, as shown below: Supertex inc. Multi-level Logic Dimming ● ● ● 5 PWM 4 R SET Dual-cell Alkaline Operation The HV9903 LED driver may be used in 2-cell alkaline bat- ...
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... Second, try to keep the two loop areas as concentric as pos- sible. Lastly, make traces as short and wide as possible. To avoid LED current errors, keep the R separate from high current ground paths and connect direct pin 2. The following schematic depicts the high frequency paths Supertex inc. capacitor. and their enclosed areas should be 1.0µ ...
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... LQH32CN4R7M11 6.0V 9.0V Supertex inc. Supplying the power stage directly from the batteries reduc- es the load on the regulated supply, which in turn increases ) from an available overall efficiency and keeps components small. The same DD dimming techniques used in the single-supply application may be used in this dual-supply application ...
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... Shut down input. A logic low disables the IC and places it in low power standby. A logic high 5 SHDN enables the IC via a soft-start sequence. Input voltage supply pin common practice to use a bypass capacitor as close as pos- 6 VDD sible to the device on this pin. Supertex inc. again falls below 100mV. RSET ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 10 is pulled to V SET ● ...
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... MAX 1.00 0.05 0.25 0.43 Drawings not to scale. Supertex Doc. #: DSPD-6DFNK63X3P095, Version B090808. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) 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 Supertex inc. an adequate “ ...