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TDA4862 Dataheets PDF



Part Number TDA4862
Manufacturers Infineon
Logo Infineon
Description Power-Factor Controller (PFC) IC
Datasheet TDA4862 DatasheetTDA4862 Datasheet (PDF)

Power-Factor Controller (PFC) IC for High Power Factor and Active Harmonic Filter Advanced Information Features • IC for sinusoidal line-current consumption • Power factor approaching 1 • Controls boost converter as an active harmonics filter • Internal start-up with low current consumption • Zero current detector for discontinuous operation mode • High current totem pole gate driver • Trimmed ± 1.4% internal reference • Undervoltage lock-out with hysteresis • Very low start-up current consumpti.

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Power-Factor Controller (PFC) IC for High Power Factor and Active Harmonic Filter Advanced Information Features • IC for sinusoidal line-current consumption • Power factor approaching 1 • Controls boost converter as an active harmonics filter • Internal start-up with low current consumption • Zero current detector for discontinuous operation mode • High current totem pole gate driver • Trimmed ± 1.4% internal reference • Undervoltage lock-out with hysteresis • Very low start-up current consumption • Pin compatible to world standard • Fast overvoltage regulator • Current sense input with internal low pass filter Type ▼ TDA 4862 ▼ TDA 4862 G ▼ = New type Ordering Code Q67000-A8368 Q67006-A8369 TDA 4862 Bipolar IC PG-DIP-8-1 PG-DSO-8-1 Package PG-DIP-8-1 PG-DSO-8-1 1 2005-02-17 TDA 4862 Description The TDA 4862 is excellent convenient for designing a preconverter in ballasts and switched mode power supplies with sinusoidal line current consumption and a power factor approaching unity. The TDA 4862 controls a boost converter as an active harmonics filter in a discontinuous mode (free oscillating triangular shaped current mode). The TDA 4862 comprises an internal start-up timer, a high gain voltage amplifier, an one quadrant multiplier for approaching unity power factor, a zero current detector, PWM and logic circuitry, and totem pole MOSFET gate driver. Protective features are: input undervoltage lockout with hysteresis, VCC zener clamp, cycle-by-cycle current limiting, output voltage limiting for fast and slow load changes up to open circuit, and a sinking gate driver current activated whenever undervoltage mode occurs. The output voltage of this preconverter is regulated with high accuracy. Therefore the device can be used for world-wide line voltages without switches. The TDA 4862 is the improved version of the TDA 4817 with a pinout equivalent to world standard. TDA 4862 G TDA 4862 VSENSE VAOUT MULTIN Ι SENSE 1 2 3 4 8 7 6 5 IEP01748 VCC GTDRV GND DETIN VSENSE VAOUT MULTIN Ι SENSE 1 2 3 4 8 VCC 7 GTDRV 6 GND 5 DETIN IEP01749 Figure 1 Pin Configuration (top view) 2 2005-02-17 TDA 4862 Pin Definitions and Functions Pin Symbol Function 1 VSENSE Voltage Amplifier Inverting Input; VSENSE is connected via a resistive divider to the boost converter output. With a capacitor connected to VAOUT it forms an integrator. 2 VAOUT Voltage Amplifier Output; VAOUT 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 whenVAOUT 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. 3 MULTIN Multiplier Input; MULTIN is the second multiplier input and connected via a resistive divider to the rectifier output voltage. I4 SENSE Current Sense Minus; ISENSE is connected to a sense resis.


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