ML4812IP Micro Linear, ML4812IP Datasheet
ML4812IP
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ML4812IP Summary of contents
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GENERAL DESCRIPTION The ML4812 is designed to optimally facilitate a peak current control boost type power factor correction system. Special care has been taken in the design of the ML4812 to increase system noise immunity. The circuit includes a precision ...
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ML4812 PIN CONFIGURATION ML4812 16-Pin PDIP (P16) I SENSE OUT 2 15 GND EA OUT REF EA– OVP 5 12 OUT I SINE 6 11 PWR GND SHDN ...
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ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Supply Current (I ) ............................................... 30mA CC Output Current ...
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ML4812 ELECTRICAL CHARACTERISTICS PARAMETER GAIN MODULATOR I Input Voltage SINE Output Current (GM OUT) Bandwidth PSRR OVP COMPARATOR Input Offset Voltage Hysteresis Input Bias Current Propagation Delay PWM COMPARATOR: I SENSE Input Offset Voltage Input Offset Current Input Common Mode ...
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FUNCTIONAL DESCRIPTION OSCILLATOR The ML4812 oscillator charges the external capacitor (C with a current (I ) equal to 5/R . When the capacitor SET SET voltage reaches the upper threshold, the comparator changes state and the capacitor discharges to the ...
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ML4812 FUNCTIONAL DESCRIPTION OUTPUT DRIVER STAGE The ML4812 output driver peak output high speed totem pole circuit designed to quickly drive capacitive loads, such as power MOSFET gates. (Figure 3) ERROR AMPLIFIER The ML4812 error amplifier is ...
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TYPICAL APPLICATIONS INPUT INDUCTOR (L1) SELECTION The central component in the regulator is the input boost inductor. The value of this inductor controls various critical operational aspects of the regulator. If the value is too low, the input current distortion ...
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ML4812 TYPICAL APPLICATIONS (Continued) The recommended maximum duty cycle is 95% at 100KHz to allow time for the input inductor to dump its energy to the output capacitors. For example, if: V 380V and D (max) = 0.95, then substituting ...
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TYPICAL APPLICATIONS (Continued) CURRENT SENSE AND SLOPE (RAMP) COMPENSATION COMPONENT SELECTION Slope compensation in the ML4812 is provided internally. Rather than adding slope to the noninverting input of the PWM comparator actually subtracted from the voltage present at ...
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ML4812 TYPICAL APPLICATIONS (Continued) Choose 4.75k , 1%. One more critical component in the voltage regulation loop is the feedback capacitor for the error amplifier. The voltage loop bandwidth should be set such that it rejects the 120Hz ripple which ...
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TYPICAL APPLICATIONS (Continued) MATERIAL MANUFACTURER Powdered Iron Powdered Iron Molypermalloy SPANG (Mag. Inc.) MAGNETICS TIPS L1 — Main Inductor As shown in Table 1, one of several toroidal cores can be used for L1. The T184-40 core above is the ...
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ML4812 Figure 12. Typical Application, 200W Power Factor Correction Circuit 12 ...
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... Ceramic T D1, D2, D3, D4, D10 1N5406 (Motorola) D5 MUR850 (Motorola) D6, D8, D9 1N4148 D11, D12, D13 F1 5A, 250V 3AG with clips IC1 ML4812CP (Micro Linear) L1 2mH PEAK Q1 IRF840 or MTPN8N50 Q2 LM7815CT Q3 2N2222 or equivalent Table 2. Component Values/Bill of Materials for Figure 12 REFERENCE R1A, R1B, R4A, R4B ...
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ML4812 + Figure 13. 1kW Input Power, Power Factor Correction Circuit 14 ...
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PHYSICAL DIMENSIONS 16 PIN 0.02 MIN (0.50 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 0.385 - 0.395 (8.89 - 10.03) 0.350 - 0.356 (8.89 - 9.04) 1 PIN 1 ID 0.042 - 0.048 ...
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... ORDERING INFORMATION PART NUMBER ML4812CP ML4812CQ ML4812IP ML4812IQ © Micro Linear 1998 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; ...