ML4813CP Micro Linear, ML4813CP Datasheet
ML4813CP
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ML4813CP Summary of contents
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GENERAL DESCRIPTION The ML4813 is a PWM controller designed for use in a discontinuous "flyback" or "buck-boost" type power factor correction (PFC) system for low power, low cost applications. The circuit includes a precision reference, oscillator, error amplifier, over-voltage comparator, ...
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ML4813 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION 1 I Current limit sense pin which is LIMIT normally connected to the sense resistor. When I the PWM cycle is terminated 2 SOFT START Connection for the soft start capacitor 3 ...
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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 ....................................................... 40mA OUT Current ............................................................. ±1A OUT ...
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ML4813 ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS ERROR AMPLIFIER Input Offset Voltage Input Bias Current Open Loop Gain 1V < COMP < 5V PSRR 12V < V < 25V CC Output Sink Current Output Source Current Output High Voltage Output Low Voltage ...
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ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS OUTPUT Output Low Voltage I = 200mA OUT Output High Voltage Rise/Fall Time UNDERVOLTAGE LOCKOUT Start-up Threshold Shutdown Threshold V Good Threshold REF SUPPLY Start-up Current V = 14V CC Operating Current Shunt Regulator Voltage Note ...
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ML4813 FUNCTIONAL DESCRIPTION OSCILLATOR The ML4813 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 ...
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V CC 80µs PULSED LOAD 14 13 SOURCE SATURATION LOAD TO GROUND SINK SATURATION LOAD 200 400 OUTPUT CURRENT (mA) Figure 3. Output Saturation Voltage vs. Output Current ...
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ML4813 APPLICATIONS The ML4813 is used to implement a discontinuous mode flyback (buck-boost) power factor regulator as shown in Figure 7. This topology is particularly well suited for low power applications such as fluorescent ballasts and low power switching supplies. ...
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APPLICATIONS (Continued) Note that sin( ) and that The average value of the input triangular current is ™ ™ sin AVG ...
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ML4813 Figure 9. 80W Flyback Power Factor Regulator Using the ML4813 10 ...
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APPLICATIONS (Continued) The output voltage "rides" on the input voltage when the (+) output is measured with respect to PWR GND as shown in Figure 10. The extra op amp provided in the ML4813 can be used to sense the ...
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ML4813 APPLICATIONS (Continued) OFF-LINE START-UP AND BIAS SUPPLY GENERATION A fast starting circuit is included in Figure 9. MOSFET Q2 quickly charges the ML4813 V capacitor (C8) when the CC supply is initially turned on. This allows the supply to ...
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APPLICATIONS (Continued) INDUCTOR INFORMATION L3 is the flyback inductor and also provides the operating power for the control circuitry. A gapped ferrite pot core was chosen for this application for it's modest high frequency losses with high ripple current operation. ...
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ML4813 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 ...
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... ORDERING INFORMATION PART NUMBER ML4813CP (EOL) ML4813CS (Obsolete) ML4813IP (Obsolete) ML4813IS (Obsolete) © Micro Linear 1996 is a registered trademark of Micro Linear Corporation. 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; 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. Japan: 2,598,946; 2,619,299. Other patents are pending. ...