uba20270 NXP Semiconductors, uba20270 Datasheet - Page 3

• Manufacturer Part Number: uba20270
• Description: 600 V Driver Ic For Dimmable Compact Fluorescent Lamps
• Manufacturer: NXP Semiconductors

Fig 1.
SGND
CP
CB
11
12
13
Block diagram
BOOST TIMER
REFERENCE
1 μA
CURRENT
PREHEAT/
1.27 V
V
4
SUPPLY
5 V ANALOG
5 V DIGITAL
DD
RREF
5
6 μA
REFERENCE
VOLTAGES
CONTROLLED OSCILLATOR
V
I
60 μA
VS LOW
RESET
VOLTAGE
5 V
6
CF
VCO
TEMPERATURE
160° 120° 80°
FREQUENCY
SENSOR
CONTROL
LOGIC
POWER-DOWN STATE
START-UP STATE
PREHEAT STATE
IGNITION STATE
BOOST STATE
RESET STATE
HOLD STATE
BURN STATE
STATE LOGIC
DIVIDE BY 2
LOGIC
8
CI
CURRENT
SENSOR
LAMP
OTA
AMPLIFIER
DRIVER
LOGIC
BOOST
9
CSI
DSR
BOOTSTRAP
V LD
V otp(CSI)
V clamp
(CSI)
SHIFTER
LEVEL
BOOST ENABLE
IGNITION CURRENT DETECTOR
CAPACITIVE MODE DETECTOR
PREHEAT CURRENT SENSOR
25 μA
7
MDL
OVERCURRENT DETECTOR
DCI
INDUCTOR SATURATION/
25 μA
V th(bst)
LEVEL SHIFT
(DCI)
HS
driver
LS
driver
V th(capm)SLS
START ENABLE
V ph(SLS)
V th(start)
V T(hec1)
DCI
V th(det)ign(CSI)
(DCI)
V th(ocp)SLS
CONTROL
DIMMER
001aam663
14
16
15
10
2
1
3
FS
GHS
HBO
GLS
SLS
PGND
DCI