ml4841is Micro Electronics Corporation, ml4841is Datasheet
ml4841is
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ml4841is Summary of contents
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Variable Feedforward PFC/PWM Controller Combo GENERAL DESCRIPTION The ML4841 is a controller for power factor corrected, switched mode power supplies. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on ...
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ML4841 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION 1 IEAO PFC transconductance current error amplifier output 2 I PFC gain control reference input Current sense input to the PFC current SENSE limit comparator 4 V Input for ...
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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. V Shunt Regulator Current .................................. 55mA CC I Voltage ...
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ML4841 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER OVP COMPARATOR Threshold Voltage Hysteresis PFC I COMPARATOR LIMIT Threshold Voltage PFC Gain Modulator Output) LIMIT TH Delay to Output DC I COMPARATOR LIMIT Threshold Voltage Input Bias Current Delay to Output ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER PFC Minimum Duty Cycle Maximum Duty Cycle Output Low Voltage Output High Voltage Rise/Fall Time PWM DC Duty Cycle Range V Output Low Voltage OL V Output High Voltage OH Rise/Fall Time SUPPLY V Shunt Regulator ...
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ML4841 TYPICAL PERFORMANCE CHARACTERISTICS 250 200 150 100 (V) Voltage Error Amplifier (VEA) Transconductance (g 16 VEAO V FB VEA IEA 3. 2. GAIN ...
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FUNCTIONAL DESCRIPTION The ML4841 consists of an average current controlled, continuous boost Power Factor Corrector (PFC) front end and a synchronized Pulse Width Modulator (PWM) back end. The PWM section uses current mode control. The PWM stage uses conventional trailing-edge ...
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ML4841 FUNCTIONAL DESCRIPTION 3) The output of the voltage error amplifier, VEAO. The gain modulator responds linearly to variations in this voltage. The output of the gain modulator is a current signal, in the form of a full wave rectified ...
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FUNCTIONAL DESCRIPTION the voltage and current error amplifiers, along with their respective return points. The current loop compensation is returned produce a soft-start characteristic on REF the PFC: as the reference voltage comes up from zero volts, ...
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ML4841 FUNCTIONAL DESCRIPTION 13.5V and assuming Ramp Peak = 5V to allow CC for component tolerances 463 . R C CHARGE T T The capacitor value should remain small to keep the discharge energy and ...
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FUNCTIONAL DESCRIPTION Generating V CC The ML4841 is a current-fed part. It has an internal shunt voltage regulator, which is designed to regulate the voltage internal to the part at 13.5V. This allows a low power dissipation while at the ...
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ML4841 VIN – REF RAMP OSC CLK U4 12 SW2 SW1 C1 VEAO DFF CMP + R Q – CLK Figure 5. Leading/Trailing Edge Control ...
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TYPICAL APPLICATIONS Figure 6 is the application circuit for a complete 100W power factor corrected power supply, designed using the AC INPUT 85 TO 265VAC F1 C1 3.15A 680nF R2A 453k BR1 4A, 600V R1A 499k R27 22k R2B 453k ...
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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) 0.400 - 0.414 (10.16 - 10.52) 16 PIN 0.024 - 0.034 (0.61 - 0.86) (4 PLACES) ...
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... PART NUMBER ML4841CP ML4841CS ML4841IP ML4841IS © Micro Linear 1997 is a registered trademark of Micro Linear Corporation. Products described herein may be covered by one or more of the following patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565761; 5,592,128; 5,594,376. Other patents are pending Micro Linear reserves the right to make changes to any product herein to improve reliability, function or design ...