3/16

L6562

Table 4. Pin Description

N°

Pin

Function

1

INV

Inverting input of the error amplifier. The information on the output voltage of the PFC pre-

regulator is fed into the pin through a resistor divider.

2

COMP

Output of the error amplifier. A compensation network is placed between this pin and INV (pin

#1) to achieve stability of the voltage control loop and ensure high power factor and low THD.

3

MULT

Main input to the multiplier. This pin is connected to the rectified mains voltage via a resistor

divider and provides the sinusoidal reference to the current loop.

4

CS

Input to the PWM comparator. The current flowing in the MOSFET is sensed through a resistor,

the resulting voltage is applied to this pin and compared with an internal sinusoidal-shaped

reference, generated by the multiplier, to determine MOSFET’s turn-off.

5

ZCD

Boost inductor’s demagnetization sensing input for transition-mode operation. A negative-going

edge triggers MOSFET’s turn-on.

6

GND

Ground. Current return for both the signal part of the IC and the gate driver.

7

GD

Gate driver output. The totem pole output stage is able to drive power MOSFET’s and IGBT’s

with a peak current of 600 mA source and 800 mA sink. The high-level voltage of this pin is

clamped at about 12V to avoid excessive gate voltages in case the pin is supplied with a high

Vcc.

8

Vcc

Supply Voltage of both the signal part of the IC and the gate driver. The supply voltage upper

limit is extended to 22V min. to provide more headroom for supply voltage changes.

Table 5. Electrical Characteristics

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY VOLTAGE

Operating range

After turn-on

10.3

22

V

Turn-on threshold

(1)

11

12

13

V

Turn-off threshold

(1)

8.7

9.5

10.3

V

Hys

Hysteresis

2.2

2.8

V

Zener Voltage

22

25

28

V

SUPPLY CURRENT

Start-up Current

40

70

µA

Quiescent Current

After turn-on

2.5

3.75

mA

Operating Supply Current

@ 70 kHz

3.5

5

mA

Quiescent Current

During OVP (either static or

2.2

mA

MULTIPLIER INPUT

Input Bias Current

-1

µA

Linear Operation Range

0 to 3

V

Output Max. Slope

1.65

1.9

V/V

K

0.5

0.6

0.7

1/V

ERROR AMPLIFIER

Voltage Feedback Input

Threshold

2.465

2.5

2.535

V

2.44

2.56

Line Regulation

Vcc = 10.3 V to 22V

2

5

mV

Input Bias Current

-1

µA

V

CS

∆

V

MU L T

∆

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