mic4833 Micrel Semiconductor, mic4833 Datasheet
mic4833
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mic4833 Summary of contents
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... General Description The MIC4833 is a low noise dual Electroluminescent (EL) Panel driver used in backlighting applications. The MIC4833 converts a low DC voltage to a high DC voltage using a boost converter and then alternates the high DC voltage across the EL panels using an H-bridge. The MIC4833 incorporates internal wave-shaping circuitry specifically designed to reduce audible noise emitted by EL panels ...
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... Optional resistor to set output current drive to control slew rate of load. If left open, the default slew current limit is 5mA. Heat Sink Pad. Connect to ground externally. 2 Lead Finish Pb-free / RoHS Compliant 12 SLEW 11 ELA 10 ELB 9 COM (ML) – Top View ) to VDD. Connecting the GND disables EL MIC4833 SW M9999-100308 (408) 955-1690 ...
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... J ® θ MLF -12L …………………….................... 60°C/W JA ≤ 85°C. J Min Typ Max Units 2 250 175 445 80 2.5 7 0.4 20 MIC4833 DD 5.8 V 152 220 µA 0.1 1 µA 6.0 12.0 Ω 120 109 kHz 100 125 kHz 350 ...
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... INPUT VOLTAGE (V) Brightness vs. Input Voltage Distance = 135kHz 225Hz 220µ 2.5 3 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) 4 MIC4833 Input Current vs. EL Frequency (Single EL Lamp 3. 75kHz ...
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... SLEW October 2008 220µH VDD VDD SW SW Oscillator Driver VREF REL EL Oscillator ENA EL-A Enable ENB EL-B Enable Output Wave-Shaping Figure 1. MIC4833 Block Diagram Output Driver PGND VSENSE Output Driver Driver Logic & PWM Dimming Output Driver PGND GND GND MIC4833 VCS 2 ...
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... Micrel Functional Description Overview The MIC4833 is a high-voltage dual output EL driver with a peak-to-peak AC output voltage of 220V 2 capable of driving two panels. The MIC4833 drives EL panels by converting a low DC input voltage high output voltage using the boost regulator circuit and then alternating the high DC voltage across the EL panel using an H-Bridge ...
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... Figure 2. 150Hz Output Waveform Figure 3. 250Hz Output Waveform Figure 4. 350Hz Output Waveform October 2008 PWM Dimming The MIC4833 may be dimmed by adding a shunt capacitor ( the REL pin, shown in Figure 5. PWM The duty cycle of the PWM signal changes the frequency of the EL panel, thereby changing its brightness ...
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... ESR capacitor improves the efficiency of the MIC4833 circuit. Selection of the capacitor value depends upon the peak inductor current, inductor size, and the load. The MIC4833 is designed for use Lowering the with an output capacitance as low as 2.2nF. For minimum audible noise, the use of a C0G/NPO dielectric output capacitor is recommended ...
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... VIN VDD RSW 332k C1 RSW 0.01µF REL MIC4833 1.78M REL High ENB Low GND VIN 220µH Li Ion 3V to 4.2V C2 10µF Figure 6: Typical Li-Ion Powered MIC4833 Circuit 150 200 250 2.80 2.10 1.69 ) 324 340 357 ) 138 132 126 357 365 392 ) 125 122 ...
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... I . (4mmx4mmx1.2mm) SAT (2) Vishay 200V/200mA Hi-Voltage Switching Diode (2) Vishay 332kΩ, 1%, 1/16W, Size 0603 (2) Vishay 1.78MΩ, 1%, 1/16W, Size 0603 (3) Micrel Low Noise Dual 220Vp-p EL Driver with Output Slew Control 10 Description M9999-100308 (408) 955-1690 MIC4833 Qty Optional 1 ...
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... Micrel Layout Recommendation October 2008 Top Layer Bottom Layer 11 MIC4833 M9999-100308 (408) 955-1690 ...
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... 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 October 2008 12-Pin 3mm x 3mm MLF indemnify Micrel for any damages resulting from such use or sale. © 2008 Micrel, Incorporated. 12 ® (ML) MIC4833 nt M9999-100308 (408) 955-1690 ...