ml4830 Microsemi Corporation, ml4830 Datasheet
ml4830
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ml4830 Summary of contents
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... GENERAL DESCRIPTION The ML4830 is a complete solution for a dimmable, high power factor, high efficiency electronic ballast. Contained in the ML4830 are controllers for “boost” type power factor correction as well as for a dimming ballast. The Power factor circuit uses the average current sensing method with a gain modulator and over-voltage protection ...
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... GND R(X)/C(X) R(T)/C(T) OVP/INHIBIT INTERRUPT PIN# NAME 11 OVP/ INHIBIT 12 R(X)/C(X) 13 GND 14 OUT B 15 OUT A 16 PFC OUT 17 VCC 18 V REF 19 EA– OUT resets REF ML4830 20-PIN PDIP (P20) IA– EA OUT 1 20 EA– REF VCC 4 17 PFC OUT 5 16 OUT A ...
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... Junction Temperature ............................................ 150°C Storage Temperature Range ................... –65°C to +150°C Lead Temperature (Soldering 10 Sec.) .................. +260°C Thermal Resistance ( Plastic DIP–P ................................................... 65°C/W Plastic SOIC ..................................................... 80°C/W OPERATING CONDITIONS Temperature Range ML4830C .................................................. 0°C to 85°C = Junction Operating Temperature Range, J CONDITIONS V – 3V < V < V – 0.5V ...
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... ML4830 ELECTRICAL CHARACTERISTICS PARAMETER Oscillator Initial accuracy Voltage stability Temperature stability Total Variation Ramp Valley to Peak C(T) Charging Current (FM Modes) C(T) Discharge Current Output Drive Deadtime R(SET) Voltage Reference Section Output Voltage Line regulation Load regulation Temperature stability Total Variation Output Noise Voltage ...
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... CC CCZ POWER FACTOR SECTION The ML4830 Power Factor section is an average current sensing boost mode PFC control circuit which is architecturally similar to that found in the ML4821. For detailed information on this control architecture, please refer to Application Note 16 and the ML4821 data sheet. ...
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... PREHEAT AND INTERRUPT TIMER A1 + – 6. – VCO– PWM + – Figure 1. ML4830 Block Diagram (Figure 2). In the overlapping mode DIS MODE LOGIC VCO–O PWM LFB OUT LAMP F.B. – OSCILLATOR + CLK R(SET) 2.5V I R(SET) R(T)/C(T) PFC OUT OUT ...
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... OPEN Overlapping VCO F.M. PWM VREF Pulse Width Modulation Table 1. ML4830 Operating Modes OSCILLATOR In Table 1 above, the two VCO frequency ranges are controlled by the output of the LFB amplifier (Pin 6). As lamp current decreases, Pin 6 rises in voltage, causing the C(T) charging current to decrease, thereby causing the oscillator frequency to decrease ...
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... STARTING, RE-START, PREHEAT AND INTERRUPT The lamp starting scenario implemented in the ML4830 is designed to maximize lamp life and minimize ballast heating during lamp out conditions. The circuit in Figure 4 controls the lamp starting scenarios: Filament preheat and Lamp Out interrupt. C(X) is charged ...
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... LOCKOUT 7.5 INT INHIBIT SEMI-STANDARD CAPABILITIES The ML4830 is designed to work in a wide variety of electronic ballast applications. For high volume, cost sensitive applications, a ballast design can be implemented and debugged using the ML4830. From that design, Micro Linear can produce a reduced feature set, optimized ballast IC design quickly and easily with low risk ...
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... ML4830 APPLICATIONS Figure. 8 Typical Application: 2-Lamp Isolated Dimming Ballast with Active Power Factor Correction for 120VAC Input 10 IC1 ...
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... APPLICATIONS (continued) The schematic (Figure 8) and the bill of materials on the following pages represents a complete parts list for the schematic (Figure 8). Designators refer to Micro Linear’s “rev B” PCB. TABLE 1: PARTS LIST FOR THE ML4830 TYPICAL APPLICATION CAPACITORS QTY. REF. DESCRIPTION 2 C1, 2 3.3nF, 125VAC, 10%, ceramic, “ ...
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... ML4830 TABLE 1: PARTS LIST FOR ML4830 TYPICAL APPLICATION RESISTORS: (Continued) QTY. REF. DESCRIPTION 4 R14 100K, 1/4W, 5%, carbon film resistor 1 R15 681K, 1/4W, 5%, carbon film resistor 1 R16, 19 10K, 1/4W, 1%, metal film resistor 1 R18 4.7K, 1/4W, 5%, carbon film resistor 1 R21 33ý, 1/4W, 5%, carbon film resistor 1 R23 25K, pot (for dimming adjustment) ...
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... TABLE 1: PARTS LIST FOR ML4830 TYPICAL APPLICATION MAGNETICS: (Continued) QTY. REF. DESCRIPTION Inductor, L PRI E24/25 core set, TDK PC40 material 10 pin horizontal bobbin (Plastron #0722B-31-80) Wind as follows: 1st: 170T of 25AWG magnet wire; start pin #10, end pin #9. 1 layer of mylar tape 2nd #32 magnet wire ...
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... ML4830 PHYSICAL DIMENSIONS 20 PIN 0.060 MIN (1.52 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 14 inches (millimeters) Package: P20 20-Pin PDIP 1.010 - 1.035 (25.65 - 26.29) 0.240 - 0.260 (6.09 - 6.61) 0.055 - 0.065 0.100 BSC (1.40 - 1.65) (2.54 BSC) 0.015 MIN (0.38 MIN) SEATING PLANE 0.016 - 0.022 (0.40 - 0.56) 0.295 - 0.325 (7.49 - 8.26) 0.008 - 0.012 0º ...
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... ORDERING INFORMATION PART NUMBER ML4830CP (EOL) ML4830CS (Obsolete) © Micro Linear 1997 is a registered trademark of Micro Linear Corporation Products described in this document may be covered by one or more of the following patents, U.S.: 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; ...