TDA4862 查看數據表（PDF） - Siemens AG

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TDA4862

Power-Factor Controller (PFC) IC for High Power Factor and Active Harmonic Filter

Siemens AG 

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

1

VAOUT

2

MULTIN 3

Ι SENSE

4

8

7

6

5

IEP01748

VCC

GTDRV

GND

DETIN

VSENSE 1

VAOUT 2

MULTIN 3

Ι SENSE 4

8 VCC

7 GTDRV

6 GND

5 DETIN

IEP01749

Figure 1 Pin Configuration (top view)

Semiconductor Group

2

1998-02-16

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