Datasheet

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UBA20260 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 10 October 2011 3 of 30 NXP Semiconductors
UBA20260
600 V driver IC for step dimmable CFLs
5. Block diagram
Fig 1. Block diagram
BOOTSTRAP
FS
LOGIC
PREHEAT CURRENT SENSOR
V
ph(SLS)
25 μA
IGNITION CURRENT DETECTOR
V
th(det)ign(CSI)
LOGIC
INDUCTOR SATURATION/
OVERCURRENT DETECTOR
PGND
STEP DIM LEVEL SELECT
Q
A
Q
B
n.c.
LEVEL
SHIFTER
HS driver
LS driver
CAPACITIVE MODE DETECTOR
GHS
HBO
GLS
SLS
REFERENCE
CURRENT
1.27 V
25 μA
RREF CF CI CSI
FREQUENCY
CONTROL
LOGIC
DSR
OTA
LAMP
CURRENT
SENSOR
BOOST
AMPLIFIER
VOLTAGE
CONTROLLED OSCILLATOR
I
V
RESET STATE
START-UP STATE
PREHEAT STATE
IGNITION STATE
HOLD STATE
BOOST STATE
BURN STATE
POWER-DOWN STATE
TEMPERATURE
SENSOR
160° 120° 80°
DIVIDE BY 2
LOGIC
DRIVER
LOGIC
V
DD
SUPPLY REFERENCE
VOLTAGES
5 V DIGITAL
5 V ANALOG
5 V
1 μA
6 μA
LOGIC COUNTER
PREHEAT/
BOOST TIMER
RESET
60 μA
5 V DIGITAL MEMORY
CP
CB 12
STEP
DIMMER
LOGIC
V
th(capm)SLS
V
th(ocp)SLS
001aam761
MDL
V
clamp(CSI)
V
MDL
V
DIM_3
V
DIM_2
V
DIM_1
11
4
14
16
15
3
SGND 13
10
79865
2
1
4
2
V
DD(stop)
STATE LOGIC
+
-
+
-
+
-
+
+
-
+
-
+
-
+
-
-
+
-
+
-
∆V
dim2(CSI)
∆V
dim3(CSI)