L6382D

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in particular the L6382D embeds one driver for the PFC pre-regulator stage, two drivers for the ballast half-

bridge stage (High Voltage, including also the bootstrap function) and the last one to provide supplemen-

tary features like preheating of filaments supplied through isolated filaments in dimmable applications.

A precise reference voltage (+3.3V ±1%) able to provide up to 30mA is available to supply the

is provided by the internal high voltage start-up generator.

The chip has been conceived with advanced power management logic to minimize power losses and in-

crease the application reliability.

In the half-bridge section, a patented integrated bootstrap section replaces the external bootstrap diode.

The L6382D integrates also a function that regulates the IC supply voltage (without the need of any exter-

nal charge pump) and optimizes the current consumption.

Figure 3. Pin Connection (Top View)

Figure 4. Typical System Block Diagram

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

PFI

LSI

HSI

HEI

PFG

N.C.

TPR

GND

LSG

VCC

VREF

CSI

CSO

HEG

N.C.

HVSU

N.C.

OUT

HSG

BOOT

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

PFI

LSI

HSI

HEI

PFG

N.C.

TPR

GND

LSG

VCC

VREF

CSI

CSO

HEG

N.C.

HVSU

N.C.

OUT

HSG

BOOT

HV

START-UP

CHARGE

PUMP

REGULATOR

BOOTSTRAP

HB

DRIVER

PROTECTION

3.3V

SUPPLY

PFC

DRIVER

PFC

CIRCUIT

µ C

AC

MAINS

TL