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ML4832

Features: Complete power factor correction and dimming ballast control in one IC Low distortion, high efficiency continuous boost, average current sensing PFC section Programmable start scenario for rapid or instant start lamps Lamp current feedback for dimming control Variable frequency dimming ...

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ML4832: Features: Complete power factor correction and dimming ballast control in one IC Low distortion, high efficiency continuous boost, average current sensing PFC section Programmable start scenario fo...

ML4832 Data Sheet

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Part Number:
ML4832
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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Product Details

Description



Features:

Complete power factor correction and dimming ballast control in one IC
Low distortion, high efficiency continuous boost, average current sensing PFC section
Programmable start scenario for rapid or instant start lamps
Lamp current feedback for dimming control
Variable frequency dimming and starting
Programmable restart for lamp out condition to reduce ballast heating
Over-temperature shutdown replaces external heat sensor for safety
PFC overvoltage comparator eliminates output "runaway" due to load removal
Large oscillator amplitude and gain modulator improves noise immunity
Low start-up current <0.5mA


Specifications

Supply Current (ICC) ................................................... 60mA
Output Current, Source or Sink (OUT A, OUT B, PFC
OUT)
DC ............................................................................. 250mA
Output Energy (capacitive load per cycle) .................. 1.5mJ
Gain Modulator ISINE Input ........................................ 10mA
Analog Inputs .......................................... 0.3V to VCC 2V
IA+ Input Voltage ................................................. 3V to 2V
Maximum Forced Voltage
(EA OUT, LFB OUT) ......................................... 0.3V to 7.7V
Maximum Forced Current
(EA OUT, IA OUT, LFB OUT) ........................................±20mA
Maximum Forced Voltage
(IA OUT).......................................................... 0.3V to 7.5V
Junction Temperature ............................................... 150°C
Storage Temperature Range...................... 65°C to 150°C
Lead Temperature (Soldering 10 sec.) ..................... 260°C
Thermal Resistance (JA)
Plastic PDIP ............................................................ 70°C/W
Plastic SOIC .......................................................... 100°C/W


Description

The ML4832 is a complete solution for a dimmable/nondimmable, 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 of ML4832 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 of ML4832 provides for programmable starting scenarios with programmable preheat and lamp out-ofsocket interrupt times. The IC controls lamp output through frequency modulation using lamp current feedback.




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