TDA 4862

2

200

5-02-17

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,

V

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.

Figure 1

Pin Configuration (top view)

TDA 4862

TDA 4862 G

MULTIN

4

3

2

1

IEP01748

5

6

GND

DETIN

7

8

GTDRV

AOUT

V

SENSE

V

SENSE

Ι

4

3

2

1

IEP01749

5

6

7

8

SENSE

Ι

MULTIN

AOUT

V

SENSE

V

CC

V

GTDRV

GND

DETIN