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PDF TDA4863G Data sheet ( Hoja de datos )
| Número de pieza | TDA4863G | |
| Descripción | Boost Controller | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Datasheet, Version 2.1, 18 Feb 2005
PFC-DCM IC
Boost Controller
TDA4863/TDA4863G
Power-Factor Controller (PFC)
IC for High Power Factor
and Active Harmonic Filter
Power Management & Supply
Never stop thinking.
Free Datasheet http://www.datasheet-pdf.com/
1 page  
AC line
RF-Filter
and
Rectifier
TDA4863
Overview
DC Output
Volage
TDA4863
GND
Figure 1 Typical application
1.3 Description
The TDA4863 IC controls a boost converter in a way that sinusoidal current is taken from
the single phase line supply and stabilized DC voltage is available at the output. This
active harmonic filter limits the harmonic currents resulting from the capacitor pulsed
charge currents during rectification. The power factor which decibels the ratio between
active and apparent power is almost one. Line voltage fluctuations can be compensated
very efficiently.
Version 2.1
5
2005-02-18
Free Datasheet http://www.datasheet-pdf.com/
5 Page 
TDA4863
Functional Description
breakdown, a 0.6 V clamp prevents substrate injection. An external resistor has to be
used in series with the auxiliary winding to limit the current through the clamps.
2.8 Restart Timer
The restart timer function eliminates the need of an oscillator. The timer starts or restarts
the TDA4863 when the driver output has been off for more than 150 µs after the inductor
current reaches zero.
2.9 Undervoltage Lockout
An undervoltage lockout circuitry switches the IC on when VCC reaches the upper
threshold VCCH and switches the IC off when VCC is falling below the lower threshold VCCL.
During start up the supply current is less then 100 µA.
An internal voltage clamp has been added to protect the IC from VCC overvoltage
condition. When using this clamp special care must be taken on power dissipation.
Start up current is provided by an external start up resistor which is connected from the
AC line to the input supply voltage VCC and a storage capacitor which is connected from
VCC to ground. Be aware that this capacitor is discharged before the IC is plugged into
the application board. Otherwise the IC can be destroyed due to the high capacitor
voltage.
Bootstrap power supply is created with the previous mentioned auxiliary winding and a
diode (see “Application Circuit” on Page 21).
2.10
Gate Drive
The TDA4863 totem pole output stage is MOSFET compatible. An internal protection
ciruitry is activated when VCC is within the start up phase and ensures that the MOSFET
is turned off. The totem pole output has been optimized to minimize cross conduction
current during high speed operation.
Version 2.1
11
2005-02-18
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11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet TDA4863G.PDF ] | |
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