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6.

Block diagram

Fig 1.

Block diagram

mgw579

DRIVER

LOGIC

LEVEL

SHIFTER

BOOTSTRAP

FREQUENCY

CONTROL

AVERAGE

CURRENT

SENSOR

CSP

15

GH

10

9

CSN

16

LOGIC

LAMP

VOLTAGE

SENSOR

VOLTAGE

CONTROLLED

OSCILLATOR

REFERENCE

CURRENT

I

V

GL

LS

DRIVER

HS

DRIVER

6

SH

11

ACM

12

PREHEAT TIMER

STATE LOGIC

SUPPLY

V

REF

reset

reference

voltages

digital

analog

supply (5 V)

3 V

714

LOGIC

1

4

CT

IREF

3

CF

13

LVS

2

CSW

5

GND

ANT/CMD

UBA2014

PCS

8

PCS