ML4800CSX_NL Fairchild Semiconductor, ML4800CSX_NL Datasheet - Page 7

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ML4800CSX_NL

Manufacturer Part Number
ML4800CSX_NL
Description
IC CTLR PFC/PWM 16-SOIC
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of ML4800CSX_NL

Mode
Average Current
Frequency - Switching
76kHz
Current - Startup
200µA
Voltage - Supply
11 V ~ 16.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Switching Frequency
81 KHz
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
PRODUCT SPECIFICATION
Functional Description
Power Factor Correction
REV. 1.0.5 9/25/01
PFC Section
Gain Modulator
1.
2.
3.
A current representing the instantaneous input voltage
(amplitude and waveshape) to the PFC. The rectified
AC input sine wave is converted to a proportional
current via a resistor and is then fed into the gain
modulator at I
minimizes ground noise, as is required in high power
switching power conversion environments. The gain
modulator responds linearly to this current.
A voltage proportional to the long-term RMS AC line
voltage, derived from the rectified line voltage after
scaling and filtering. This signal is presented to the gain
modulator at V
inversely proportional to V
low values of V
over, to limit power dissipation of the circuit
components under heavy brownout conditions). The
relationship between V
illustrated in the Typical Performance Characteristics.
The output of the voltage error amplifier, VEAO. The
gain modulator responds linearly to variations in this
voltage.
AC
RMS
RMS
. Sampling current in this way
. The gain modulator s output is
where special gain contouring takes
RMS
RMS
and gain is called K, and is
2
(except at unusually
ML4800
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