Datasheet

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UBA2028 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 — 19 July 2010 4 of 23 NXP Semiconductors
UBA2028
600 V dimmable power IC for compact fluorescent lamps
6. Block diagram
Fig 1. Block diagram
014aaa906
DRIVER
LOGIC
LEVEL
SHIFTER
BOOTSTRAP
FREQUENCY
CONTROL
AVERAGE
CURRENT
SENSOR
CSP
FS
HV
CSN
LOGIC
LAMP
VOLTAGE
SENSOR
VOLTAGE
CONTROLLED
OSCILLATOR
REFERENCE
CURRENT
I
V
SL
GLI
GLO
LS
DRIVER
HS
DRIVER
SH
ACM
PREHEAT TIMER
STATE LOGIC
• reset state
• start-up state
• preheat state
• ignition state
• burn state
• hold state
• power-down state
SUPPLY
V
DD
VREF
reset
V
DD(L)
V
pd
reference
voltages
digital
analog
supply (5 V)
3 V
LOGIC
COUNTER
CT
IREF CF
LVS CSW
GND
V
lamp(fail)
V
lamp(max)
ANT/CMD
UBA2028
PCS
PCS
LOGIC
16 7
4
10
13 12 6 11
2, 3
1
19
TR1
TR2
20
18
15
5
17
8
9