Philips 19PFL5522D, Руководство по обслуживанию, Страница: 88 / 180

Circuit Descriptions, Abbreviation List, and IC Data Sheets EN 88 LC7.2E LB 9.
9.11.2 Diagram A2, Type UBA2070 (IC U300), CCFL Ballast Driver
Figure 9-13 Internal block diagram and pin configuration
Block Diagram
Pin Configurations
H_17170_035.eps
250507
DRIVER
LOGIC
LEVEL
SHIFTER
BOOTSTRAP
FREQUENCY
CONTROL
AVERAGE
CURRENT
SENSOR
CS+
15
GH
10
FVDD
9
CS−
16
LOGIC
LAMP
VOLTAGE
SENSOR
VOLTAGE
CONTROLLED
OSCILLATOR
REFERENCE
CURRENT
I
V
GL
LS
DRIVER
HS
DRIVER
6
SH
11
ACM
12
IGNITION TIMER
STATE LOGIC
•
reset state
•
ignition state
•
burn state
• hold state
•
powerdown state
SUPPLY
VDD VREF
reset
VDD(low)
VDD(clamp)
reference
voltages
digital
analog
supply (5 V)
3 V
4 1 7
LOGIC
1
4
CT
IREF
3
CF
13
LVS
2
CSW
5
GND
8
n.c.
VLVS(fail) VLVS(max)
ANT/CMD
UBA2070T
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CT
CSW
CF
IREF
GND
GL
VDD
n.c.
FVDD
GH
SH
ACM
LVS
VREF
CS
+
CS
−
UBA2070P
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CT
CSW
CF
IREF
GND
GL
VDD
n.c.
FVDD
GH
SH
ACM
LVS
VREF
CS
+
CS
−