uba20271 NXP Semiconductors, uba20271 Datasheet - Page 3

• Manufacturer Part Number: uba20271
• Description: 350 V And 600 V Power Ics For Dimmable Compact Fluorescent Lamps
• Manufacturer: NXP Semiconductors

Fig 1.
SGND
CP
CB
13
14
15
Block diagram UBA20271/2
BOOST TIMER
REFERENCE
1 μA
CURRENT
PREHEAT/
1.27 V
V
6
SUPPLY
5 V ANALOG
5 V DIGITAL
DD
RREF
7
6 μA
REFERENCE
VOLTAGES
CONTROLLED OSCILLATOR
V
I
60 μA
V
DD(stop)
RESET
VOLTAGE
5 V
8
CF
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
10
CI
CURRENT
SENSOR
OTA
LAMP
AMPLIFIER
DRIVER
LOGIC
BOOST
11
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
9
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)
V th(det)ign(CSI)
(DCI)
DCI
GHS
GLS
V th(ocp)SLS
CONTROL
DIMMER
001aam772
16
18
17
19
20
12
1
2
3
4
5
FS
DHS
HBO1
HBO2
HBO3
SLS1
SLS2
SLS3
LSAT
PGND
DCI