ML4803 Microsemi Corporation, ML4803 Datasheet
ML4803
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ML4803 Summary of contents
Page 1
... PFC and a trailing edge, PWM. The ML4803-1’s PFC and PWM operate at the same frequency, 67kHz. The PFC frequency of the ML4803-2 is automatically set at half that of the 134kHz PWM. This higher frequency allows the user to design with smaller PWM components while maintaining the optimum operating frequency for the PFC ...
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... PFC OUT PFC driver output 2 GND Ground 3 I Current sense input to the PFC current SENSE limit comparator 4 VEAO PFC one-pin error amplifier input 2 ML4803 8-Pin PDIP (P08) 8-Pin SOIC (S08) PFC OUT PWM OUT 1 8 GND SENSE I LIMIT 3 6 VEAO ...
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... Storage Temperature Range ..................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) ..................... 260°C Thermal Resistance (q Plastic DIP ..................................................... 110°C/W Plastic SOIC ................................................... 160°C/W OPERATING CONDITIONS + 0.3V CC Temperature Range ML4803CX-X ............................................. 0°C to 70°C ML4803IX-X ............................................-40°C to 85°C = Operating Temperature Range (Note 1) A CONDITIONS T = 25º EAO 10V < ...
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... Undervoltage Lockout Hysteresis Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions. 4 (Continued) CONDITIONS I = 100mA 15V OUT 1000pF 0ºC to 70ºC, ML4803 0ºC to 70ºC, ML4803 –100mA OUT I = –10mA OUT 100mA 15V OUT CC C ...
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... FUNCTIONAL DESCRIPTION The ML4803 consists of an average current mode boost Power Factor Corrector (PFC) front end followed by a synchronized Pulse Width Modulation (PWM) controller distinguished from earlier combo controllers by its low pin count, innovative input current shaping technique, and very low start-up and operating currents. The PWM section is dedicated to peak current mode operation ...
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... Since the boost converter topology in the ML4803 PFC is of the current-averaging type, no slope compensation is required. LEADING/TRAILING MODULATION ...
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... PFC capacitor. TYPICAL APPLICATIONS ONE PIN ERROR AMP The ML4803 utilizes a one pin voltage error amplifier in the PFC section (VEAO). The error amplifier is in reality a current sink which forces 35µA through the output L1 I1 ...
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... W k PFC CURRENT SENSE FILTERING In DCM, the input current wave shaping technique used (4) by the ML4803 could cause the input current to run away. In order for this technique to be able to operate properly under DCM, the programming ramp must meet the boost inductor current down-slope at zero amps ...
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... CC while protecting the part from voltage transients. This reaches circuit allows the ML4803 to deliver 15V nominal gate CC drive at PWM OUT and PFC OUT, sufficient to drive low- cost IGBTs important to limit the current through the Zener to avoid overheating or destroying it ...
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... PWM stage ISENSE V C1 RAMP GATE DRIVE OUTPUT Figure 10. Typical Peak Current Mode Waveforms RP VEAO 4 C COMP 35µ SENSE 3 Figure 11. ML4803 PFC Control February 1999 and I RMS RMS V C1 GATE OUTPUT + COMP C 1 – 30pF 5V – SENSE pins of a ...
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... R11 150 6 I LIMIT R32 100 R10 C10 0.75 2.2nF CR9 R21 3W C28 10k CR11 1µF C27 0.01µF February 1999 ML4803 C16 0.01µF CR18 51V CR3 C18 4.7nF R36 220 T1 CR2 CR2 C3 30A 30A, 60V 1µF 60V C2 2200µF L1 25µH R6 1.2k C14 4.7µ ...
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... ML4803 PHYSICAL DIMENSIONS 0.020 MIN (0.51 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 0.017 - 0.027 (0.43 - 0.69) (4 PLACES) 0.055 - 0.061 (1.40 - 1.55) 12 inches (millimeters) Package: P08 8-Pin PDIP 0.365 - 0.385 (9.27 - 9.77) 0.055 - 0.065 (1.39 - 1.65) 8 0.240 - 0.260 0.299 - 0.335 PIN 1 ID (6.09 - 6.60) (7.59 - 8.50) 1 0.100 BSC (2.54 BSC) 0.015 MIN (0.38 MIN) 0.016 - 0.020 0º ...
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... ML4803CP-1 ML4803CS-1 ML4803IP-1 ML4803IS-1 ML4803CP-2 ML4803CS-2 ML4803IP-2 ML4803IS-2 © Micro Linear 1999. 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; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376; 5,652,479; 5,661,427; 5,663,874; 5,672,959; 5,689,167; 5,714,897; 5,717,798; 5,742,151; 5,747,977; 5,754,012; 5,757,174; ...