MIC2291-15BML TR Micrel Inc, MIC2291-15BML TR Datasheet
MIC2291-15BML TR
Specifications of MIC2291-15BML TR
MIC2291-15BMLTR
Related parts for MIC2291-15BML TR
MIC2291-15BML TR Summary of contents
Page 1
... The MIC2291 is a 1.2MHz Pulse Width Modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications. With a guaranteed switch current of 1.2A, the MIC2291 easily drives a string of 3 white LEDs in series at 100mA, ensuring a high level of brightness and eliminating several ballast resistors. ...
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... Micrel, Inc. Ordering Information Part Number Marking* MIC2291BD5 SSAA MIC2291YD5 SSAA MIC2291-15BML STA MIC2291-15YML STA** MIC2291-34BML STC MIC2291-34YML STC** Notes: * Under bar / Over bar symbol may not be to scale. ** Over bar symbol located after Pin 1 identifier. Pin Configuration FB GND 5-Pin TSOT23 (D5) ...
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... I ≤ 40mA OUT 10V EN SW TURN ON TURN OFF V = 10V(6) EN MIC2291BML- 15 only MIC2291BML- 34 only Hysteresis , and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive die (2) ).......................................... 2.5V to 10V IN ) ........................ –40°C to +125°C J 2x2 MLF-8 (θ ) .................................................93°C/W JA Thin SOT23-5 (θ ...
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... Micrel, Inc. Typical Characteristics May 2007 4 MIC2291 M9999-051507 ...
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... Micrel, Inc. Functional Characteristics May 2007 5 MIC2291 M9999-051507 ...
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... Functional Description The MIC2291 is a constant frequency, PWM current mode boost regulator. The block diagram is shown above. The MIC2291 is composed of an oscillator, slope compensation ramp generator, current amplifier, g amplifier, PWM generator, and a 500mA bipolar output transistor. The oscillator generates a 1.2MHz clock. The clock’ ...
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... If the feedback resistors are disconnected from the circuit or the feedback pin is shorted to ground, the feedback pin will fall to ground potential. This will cause the MIC2291 to switch at full duty-cycle in an attempt to maintain the feedback voltage result the output voltage will climb out of control ...
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... PWM dimming, and the other is continuous dimming. 1. PWM dimming control is implemented by applying a PWM signal on EN pin as shown in Figure 1. The MIC2291 is turned on and off by the PWM signal. With this method, the LEDs operate with either zero or full current. The average LED current is increased proportionally to the duty-cycle of the PWM signal ...
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... Micrel, Inc. Package Information May 2007 5-Pin Thin SOT23 (D5) ® 8-Pin 2mm x 2mm MLF (ML) 9 MIC2291 M9999-051507 ...
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... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully May 2007 indemnify Micrel for any damages resulting from such use or sale. © 2004 Micrel, Incorporated. 10 MIC2291 M9999-051507 ...