MIC2287C MICREL [Micrel Semiconductor], MIC2287C Datasheet
MIC2287C
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MIC2287C Summary of contents
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... LED driver applications. With a maximum output voltage of 37V and a switch current of over 500mA, the MIC2287C easily drives a string white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors. The MIC2287C implements a constant frequency, 1.2MHz PWM control scheme ...
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... No connect (no internal connection to die). GND Ground (Return): Exposed backside pad. 2 Lead Finish Standard Lead Free Standard Lead Free Standard Lead Free Standard Lead Free Denotes Pb-Free GND SLA Denotes MIC2287C 8-Pin MLF™ (BML) (Top View) Micrel February 2006 ...
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... OUT 10V EN SW TURN ON TURN OFF V = 10V EN MIC2287CBML- 15 only MIC2287CBML- 24 only MIC2287CBML- 34 only Hysteresis , and the ambient temperature The maximum allowable power dissipation will result in excessive (2) ) ..........................................2.5V to 10V IN ) ............ –40°C to +105° ..................................... 93°C ......................................... 256°C/W JA < 105°C. ...
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... MIC2287C Typical Characteristics Feedback Voltage vs. Input Voltage 100 ( Series LED Efficienc 10 0.22F OUT (mA) OUT EN Pin Bias Current vs. Temperature ...
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... OVP available on MLF Functional Description The MIC2287C is a constant frequency, PWM current mode boost regulator. The block diagram is shown above. The MIC2287C is composed of an oscillator, slope compensation ramp generator, current amplifier, g generator, and a 500mA bipolar output transistor. The oscil- lator generates a 1.2MHz clock. The clock’ ...
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... MIC2287C External Component Selection The MIC2287C can be used across a wide rage of applications. The table below shows recommended inductor and output Series LEDs L 2 22µH 15µH 10µH 6.8µH 4.7µH 3 22µH 15µH 10µH 6.8µH 4.7µH 4 22µH 15µH 10µH 6.8µH 4.7µ 22µH 15µ ...
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... If the LEDs are disconnected from the circuit case an LED fails open, the sense resistor will pull the FB pin to ground. This will cause the MIC2287C to switch with a high duty-cycle, resulting in output overvoltage. This may cause the SW pin voltage to exceed its maximum voltage rating, possibly damaging the IC and the external components ...
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... MIC2287C 6-Series LED Circuit without External Soft-Start TIME (100s/div.) M0510-020906 6-Series LED Circuit with External Soft-Start L = 10 1 0.22F OUT 20mA OUT 6 LEDs 8 Micrel L = 10 1 0.22F OUT 20mA OUT 6 LEDs ...
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... MIC2287C Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...