UBA2211
Half-bridge power IC family for CFL lamps
Rev. 3 — 26 August 2011
Product data sheet
1. General description
The UBA2211 family of integrated circuits are a range of high voltage monolithic ICs for
driving Compact Fluorescent Lamps (CFL) in half-bridge configurations. The family is
designed to provide easy integration of lamp loads across a range of burner power and
mains voltages.
2. Features and benefits
2.1 System integration
Integrated half-bridge power transistors
UBA2211A: 220 V mains; 13.5
;
0.9 A maximum ignition current
UBA2211B: 220 V mains; 9
;
1.35 A maximum ignition current
UBA2211C: 220 V mains; 6.6
;
1.85 A maximum ignition current
Integrated bootstrap diode
Integrated high voltage supply
2.2 Burner current
Adjustable current controlled preheat mode enables the preheat time (t
ph
) to be set
RMS current control
2.3 Burner lifetime
Current controlled preheat with adjustable preheat time and preheat current
Minimum glow time control to support cold start
Lamp power independent from mains voltage variations
Lamp inductor saturation protection during ignition
2.4 Safety
Saturation Current Protection (SCP)
OverTemperature Protection (OTP)
Capacitive Mode Protection (CMP)
Overpower control
System shutdown when the burner fails to ignite
NXP Semiconductors
UBA2211
Half-bridge power IC family for CFL lamps
2.5 Ease of use
Adjustable operating frequency for easy fit with various burners
Each device in the family incorporates the same controller functionality ensuring easy
power scaling and roll-out across a complete range of CFLs
3. Applications
Compact Fluorescent Lamps up to 25 W for indoor and outdoor applications
4. Ordering information
Table 1.
Ordering information
Package
Name
UBA2211AP/N1
UBA2211BP/N1
UBA2211CP/N1
UBA2211AT/N1
UBA2211BT/N1
UBA2211CT/N1
SO14
plastic small outline package; 14 leads; body width
3.9 mm
SOT108-1
DIP8
Description
plastic dual in-line package; 8 leads (300 mil)
Version
SOT97-1
Type number
UBA2211
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 26 August 2011
2 of 20
NXP Semiconductors
UBA2211
Half-bridge power IC family for CFL lamps
5. Block diagram
Clamp
COUT1
rectified mains
V
DD
CVDD
LAMP
COUT2
Llamp
V
DD
DVDT
n.p. (5)
HV
6(3)
CDVDT
UBA2211
startup
7(6)
n.p. (4)
V
DD
V
DD
V
O(ref)RMS
OTP
I
sat
reset
LATCH
reset
set
5(14) OUT
HSPT
DRIVER
3(11) FS
HSPT
Cbs
SGND
V
DD
Rosc
GLOW AND I
sat
CONTROL
PULSE
RC 8(7)
VOLTAGE
CONTROLLED
OSCILLATOR
:2
V
SW
V
SW(ph)
burn state
RMS control
X
2
- V
O(ref)RMS2
SGND 2(1, 2, 9, 10, 13)
VO(ref)RMS
HS on
f
osc
NON-OVERLAP LS on
TIMER
LSPT
DRIVER
LSPT
RSENSE
Cosc
SW 1(8)
CSW
4(12) SENSE
preheat
preheat
Vref(ph)
001aal990
UBA2211XT (SO14) pin numbers are between brackets.
n.p. in the diagram means not present in UBA2211XP (DIP8 package).
Fig 1.
Block diagram
In the SO14 package, the two diodes which are required for the DVDT supply are
integrated and connected between pins DVDT and PGND.
Mount these diodes externally when using the DIP8 packaged devices because they are
not bonded out.
UBA2211
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 26 August 2011
3 of 20
NXP Semiconductors
UBA2211
Half-bridge power IC family for CFL lamps
6. Pinning information
6.1 Pinning
SGND
SGND
HV
SW
SGND
FS
SENSE
1
2
8
7
RC
V
DD
HV
OUT
PGND
DVDT
V
DD
RC
1
2
3
4
5
6
7
014aab093
14 OUT
13 SGND
12 SENSE
UBA2211T
11 FS
10 SGND
9
8
SGND
SW
UBA2211P
3
4
014aab092
6
5
Fig 2.
Pin configuration for UBA2211XP (SOT97-1)
Fig 3.
Pin configuration for UBA2211XT (SOT108-1)
6.2 Pin description
Table 2.
Symbol
SW
SGND
FS
SENSE
OUT
HV
V
DD
RC
DVDT
PGND
Pin description
Pin
UBA2211XP UBA2211XT
1
2
3
4
5
6
7
8
n.p.
n.p.
8
1, 2, 9, 10, 13
11
12
14
3
6
7
5
4
sweep timing and VCO input
signal ground
high-side floating supply output
voltage sense for preheat and RMS control
half-bridge output
high-voltage supply
internal low-voltage supply output
internal oscillator input
DVDT supply input
DVDT supply ground
Description
UBA2211
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 26 August 2011
4 of 20
NXP Semiconductors
UBA2211
Half-bridge power IC family for CFL lamps
7. Functional description
7.1 Supply voltage
The UBA2211 family is powered using a start-up current source and a DVDT supply.
When the voltage on pin HV increases, the V
DD
capacitor (C
VDD
) is charged using the
internal Junction gate Field-Effect Transistor (JFET) current source. The voltage on pin
V
DD
rises until V
DD
equals V
DD(start)
. The start-up current source is then disabled. The
half-bridge starts switching causing the charge pump to generate the required V
DD
supply.
The amount of current flowing towards V
DD
equals V
HV
C
DVDT
f where f represents the
momentary frequency. The charge pump consists of an external half-bridge capacitor
(C
DVDT
). The SO14 package contains two internal diodes with an internal Zener diode.
Mount these diodes externally with the DIP8 packaged devices. The Zener diode ensures
the V
DD
voltage cannot rise above the maximum V
DD
rating.
The DVDT supply has its own ground pin (PGND) to prevent large peak currents from
flowing through the external small signal ground pin (SGND).
The start-up current source is enabled when the voltage on pin V
DD
is below the V
DD(stop)
level.
7.2 Start-up state
When the supply voltage on pin V
DD
increases, the IC enters the start-up state. In the
start-up state the High-Side Power Transistor (HSPT) is switched off and the Low-Side
Power Transistor (LSPT) is switched on. The circuit is reset and the capacitors on the
bootstrap pin FS (C
bs
) and the low-voltage supply pin V
DD
(C
VDD
) are charged. Pins RC
and SW are switched to ground.
When pin V
DD
is above V
DD(start)
, the start-up state is exited and the preheat state is
entered. If the voltage on pin V
DD
falls below V
DD(stop)
, the system returns to the start-up
state.
Remark:
If OTP is active, the IC remains in the start-up state indefinitely. The V
DD
voltage
slowly oscillates between V
DD
= V
DD(stop)
and V
DD
= V
DD(start)
.
7.3 Reset
A DC reset circuit is incorporated in the high-side driver. The high-side transistor is
switched off when the voltage on pin FS is below the high-side lockout voltage.
7.4 Oscillation control
The oscillation frequency is based on the 555-timer function. A self oscillating circuit is
created comprising the external components: resistors R
osc
, R
SENSE
and capacitor C
osc
.
R
osc
and C
osc
determine the nominal oscillating frequency.
An internal divider 0.5
f
osc(int)
is used to generate the accurate 50 % duty cycle. The
divider sets the bridge frequency at half the oscillator frequency.
The input on pin SW generates the V
SW
signal and it is used to determine the frequency in
all states except preheat. Signal V
SW(ph)
is an internally generated signal used to
determine the frequency during the preheat state.
UBA2211
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 26 August 2011
5 of 20
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