ML4824CS2 Fairchild Semiconductor, ML4824CS2 Datasheet
![IC PFC PWM CTRLR COMBO 16-SOIC](/photos/5/45/54533/261-16-soic_sml.jpg)
ML4824CS2
Specifications of ML4824CS2
Available stocks
Related parts for ML4824CS2
ML4824CS2 Summary of contents
Page 1
ML4824 Power Factor Correction and PWM Controller Combo Features • Internally synchronized PFC and PWM in one IC • Low total harmonic distortion • Reduces ripple current in the storage capacitor between the PFC and PWM sections • Average current, ...
Page 2
ML4824 Pin Configuration Pin Description PIN NAME 1 IEAO PFC transconductance current error amplifier output 2 I PFC gain control reference input Current sense input to the PFC current limit comparator SENSE 4 V Input for PFC ...
Page 3
PRODUCT SPECIFICATION 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. Parameter V Shunt Regulator Current CC I ...
Page 4
ML4824 Electrical Characteristics Unless otherwise specified 25mA Symbol Parameter Input Bias Current Output High Voltage Output Low Voltage Source Current Sink Current Open Loop Gain Power Supply Rejection Ratio OVP Comparator Threshold Voltage Hysteresis PFC I ...
Page 5
PRODUCT SPECIFICATION Electrical Characteristics Unless otherwise specified 25mA Symbol Parameter Line Regulation Load Regulation Temperature Stability Total Variation Long Term Stability PFC Minimum Duty Cycle Maximum Duty Cycle Output Low Voltage Output High Voltage Rise/Fall Time ...
Page 6
ML4824 Typical Performance Characteristics 250 200 150 100 (V) Voltage Error Amplifier (VEA) Transconductance (g 16 IEAO VEAO V FB VEA IEA 3.5k 15 – + 2.5V + – ...
Page 7
PRODUCT SPECIFICATION Functional Description The ML4824 consists of an average current controlled, continuous boost Power Factor Corrector (PFC) front end and a synchronized Pulse Width Modulator (PWM) back end. The PWM can be used in either current or voltage mode. ...
Page 8
ML4824 3. The output of the voltage error amplifier, VEAO. The gain modulator responds linearly to variations in this voltage. The output of the gain modulator is a current signal, in the form of a full wave rectified sinusoid at ...
Page 9
PRODUCT SPECIFICATION ML4824’s voltage error amplifier has a specially shaped nonlinearity such that under steady-state operating condi- tions the transconductance of the error amplifi local minimum. Rapid perturbations in line or load conditions will cause the input ...
Page 10
ML4824 V OK Comparator IN The V OK comparator monitors the DC output of the PFC IN and inhibits the PWM if this voltage on V its nominal 2.5V. Once this voltage reaches 2.5V, which corresponds to the PFC output ...
Page 11
PRODUCT SPECIFICATION In the case of leading edge modulation, the switch is turned OFF right at the leading edge of the system clock. When the modulating ramp reaches the level of the error amplifier output voltage, the switch will be ...
Page 12
ML4824 TYPICAL APPLICATIONS Figure 6 is the application circuit for a complete 100W power factor corrected power supply, designed using the methods and general topology detailed in Application Note 33. AC INPUT 85 TO 265VAC F1 C1 3.15A 470nF 3.1mH ...
Page 13
PRODUCT SPECIFICATION Mechanical Dimensions 16 PIN 0.02 MIN (0.50 MIN) 0.055 - 0.065 (4 PLACES) (1.40 - 1.65) 0.170 MAX (4.32 MAX) 0.016 - 0.022 0.125 MIN (0.40 - 0.56) (3.18 MIN) REV. 1.0.6 11/7/03 inches (millimeters) ...
Page 14
ML4824 Mechanical Dimensions 0.400 - 0.414 (10.16 - 10.52) 16 PIN 0.024 - 0.034 0.050 BSC (0.61 - 0.86) (1.27 BSC) (4 PLACES) 0.012 - 0.020 0.090 - 0.094 (0.30 - 0.51) (2.28 - 2.39) 14 inches ...
Page 15
... ML4824 Ordering Information Part Number PWM Frequency ML4824CP1 1 x PFC ML4824CP2 2 x PFC ML4824CS1 1 x PFC ML4824CS2 2 x PFC ML4824IP1 1 x PFC ML4824IS1 1 x PFC ML4824IS2 2 x PFC DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN ...