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TDA4862 Datasheet(PDF) 3 Page - Infineon Technologies AG

Part No. TDA4862
Description  Power-Factor Controller (PFC) IC for High Power Factor and Active Harmonic Filter
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Maker  INFINEON [Infineon Technologies AG]
Homepage  http://www.infineon.com
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TDA 4862
3
200
5-02-17
Pin Definitions and Functions
Pin Symbol Function
1
V
SENSE
Voltage Amplifier Inverting Input;
V
SENSE is connected via a resistive divider to the boost converter output.
With a capacitor connected to
V
AOUT it forms an integrator.
2
V
AOUT
Voltage Amplifier Output;
V
AOUT is connected internally to the first multiplier input. To prevent
overshoot the input voltage will be clamped at 5 V. During no load
conditions output pulses are suppressed completely when
V
AOUT falls
below 2.2 V.
If the current flowing into this pin is exceeding an internal defined margin
the multiplier output voltage is reduced to prevent the MOSFET from
overvoltage damage.
3MULTIN Multiplier Input;
MULTIN is the second multiplier input and connected via a resistive
divider to the rectifier output voltage.
4
I
SENSE
Current Sense Minus;
I
SENSE is connected to a sense resistor controlling the MOSFET source
current. The input is internally clamped at – 0.3 V to prevent negative
input voltage interaction. An internal low pass filter suppresses voltage
spikes when turning the MOSFET on.
5DETIN
Zero Current Detector Input;
DETIN is connected to an auxiliary winding monitoring the zero crossing
of the inductor current.
6GND
Ground;
All voltages are measured with respect to GND.
V
CC should be
bypassed directly to GND with a 0.1
µF or larger ceramic capacitor.
7GTDRV
Gate Drive Output;
GTDRV is the output of a totem-pole circuitry for direct driving a
MOSFET. A clamping network bypasses low state source current and
high state sink current.
8
V
CC
Positive Supply Voltage;
V
CC should be connected to a stable source slightly above the VCC
turn-ON threshold for normal operation. A 100 nF or lager ceramic
capacitor connected to
V
CC absorbs supply current spikes required to
charge external MOSFET gate capacitances.




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