HV9906 Supertex Inc, HV9906 Datasheet
HV9906
Related parts for HV9906
HV9906 Summary of contents
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... HV9906 FlexSwitch General Description The Supertex HV9906 allows the development of the smallest possible, most reliable, offline and wide DC/DC conversion range converters for driving LEDs and other applications. The HV9906 2 ) combines internally all the components required to operate directly from the rectified AC line with a feedback mechanism that eliminates filters & ...
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... Typical under UVLO mA * Gate pin open and operating Decaying nSec C = 750pF GATE nSec C = 750pF GATE nSec V = 5.0V ON uSec V = 0.2V ON uSec KHz KHz V * Note: V and V are matched Note: V and V are matched HV9906 Dice HV9906X MAX 07/23/02 ...
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... PS – This pin is the positive terminal of the differential sense feedback circuit. 1V Bandgap Reference Vref Vdd C VCO C Delay Sample Pulse Delay Vdd 1V 3 controls the on time (pulse width) of the gate output. IN Vdd Vref Driver S 1V HV9906 GATE PGND NS PS 07/23/02 ...
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... Functional Description The HV9906 consists of the following functional blocks: High Voltage Regulator Bandgap Reference Under Voltage Lockout and Power On Reset Voltage Controlled Oscillator Feed Forward On Time Control Differential Sense Circuit and Programmable Reference Integrator Sample and Hold VCO Control Gate Driver ...
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... VCO cycle. Thereafter, the differential sense feedback loop increments the frequency in small steps, increasing the power transfer rate until output regulation is achieved, thereby providing the required soft start function HV9906 2 ) feedback controls the For certain off-line topologies, the 07/23/02 ...
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... Protection PS NS The HV9906 used as a current source is inherently protected in the case of an output short. Over voltage protection is easily accomplished, in the flyback-buck application for example, with no more than two diodes. Simple protection for voltage mode applications, and other topologies is easy to accomplish. Call for more information ...
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... IN The maximum power dissipation in the resistor will RMS and the maximum power dissipation in the HV9906 will which for an SOIC packaged device will result in junction to ambient temperature difference of 159 C/W x 0.48W = 76.32 C, thereby allowing operation ambient temperature of 73.68 C for the absolute maximum junction temperature of 150 C. ...
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... PS This method limits the +V voltage depletion MOSFET for all input voltages and in fact raises the maximum allowable peak input voltage to the breakdown voltage rating of the depletion MOSFET. dissipation in the HV9906 is now given by the equation Power Dissipation HV9906 = ( OFF ...
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... NPN Bipolar Transistor Array or Matched 2N2222 Negative Voltage - + LED-1 LED-1 LED-1 Row 1 Row 2 Row 3 20mA 20mA 20mA LED-9 LED-9 LED-9 Row 1 Row 2 Row 3 R5 LED-10 LED-10 100 Row 2 Row 3 HV9906 Q25 LED-1 Row 25 20mA LED-9 Row 25 LED-10 Row 25 07/23/02 ...
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... LED-5 Row 1 R9 Input Voltage 80VAC to 135VAC LED String Forward Voltage 20V Power Factor >0.95 THD <15% P 10W D6 L2 MURS120T3 - 12V C3 Lead-Acid D7 + Battery MURS120T3 R5 R3 13.3k 225k R6 M1 500 R7 R4 0.5 150k HV9906 LED-1 LED-1 Row 2 Row 3 LED-2 LED-2 Row 2 Row 3 LED-5 LED-5 Row 2 Row 3 07/23/02 ...