 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ML4832CS Datasheet(PDF) 1 Page - Micro Linear Corporation |
|
|
|||||||||||||||||||||||||||||
ML4832CS Datasheet(HTML) 1 Page - Micro Linear Corporation |
|
|
1 / 15 page  July 2000 PRELIMINARY ML4832* Electronic Dimming Ballast Controller GENERAL DESCRIPTION The ML4832 is a complete solution for a dimmable/non- dimmable, high power factor, high efficiency electronic ballast. The BiCMOS ML4832 contains 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 overvoltage protection. This system produces a power factor of better than 0.99 with low input current THD at > 95% efficiency. Special care has been taken in the design of the ML4832 to increase system noise immunity by using a high amplitude oscillator, and a current-fed multiplier. An overvoltage protection comparator inhibits the PFC section in the event of a lamp out or lamp failure condition. The ballast section provides for programmable starting scenarios with programmable preheat and lamp out-of- socket interrupt times. The IC controls lamp output through frequency modulation using lamp current feedback. FEATURES s Complete power factor correction and dimming ballast control in one IC s Low distortion, high efficiency continuous boost, average current sensing PFC section s Programmable start scenario for rapid or instant start lamps s Lamp current feedback for dimming control s Variable frequency dimming and starting s Programmable restart for lamp out condition to reduce ballast heating s Over-temperature shutdown replaces external heat sensor for safety s PFC overvoltage comparator eliminates output “runaway” due to load removal s Large oscillator amplitude and gain modulator improves noise immunity s Low start-up current <0.5mA 1 BLOCK DIAGRAM 7 RSET VARIABLE FREQUENCY OSCILLATOR 8 RT/CT 10 RX/CX PRE-HEAT AND INTERRUPT TIMERS CONTROL & GATING LOGIC 2 IA OUT 4 IA+ POWER FACTOR CONTROLLER UNDER-VOLTAGE AND THERMAL SHUTDOWN OUTPUT DRIVERS 3 ISINE 1 EA OUT 18 EA–/OVP VREF 17 PFC OUT 15 GND 11 VCC 16 PGND 12 OUT B 13 OUT A 14 LFB OUT 6 LAMP FB 5 INTERRUPT 9 (* Indicates part is End Of Life as of July 1, 2000) |
Similar Part No. - ML4832CS |
|
Similar Description - ML4832CS |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
British ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
