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UBA2021 の電気的特性と機能

UBA2021のメーカーはNXP Semiconductorsです、この部品の機能は「630 V driver IC for CFL and TL lamps」です。


製品の詳細 ( Datasheet PDF )

部品番号 UBA2021
部品説明 630 V driver IC for CFL and TL lamps
メーカ NXP Semiconductors
ロゴ NXP Semiconductors ロゴ 




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UBA2021 Datasheet, UBA2021 PDF,ピン配置, 機能
UBA2021
630 V driver IC for CFL and TL lamps
Rev. 04 — 25 July 2008
Product data sheet
1. General description
The UBA2021 is a high voltage IC intended to drive and control Compact Fluorescent
Lamps (CFL) or fluorescent TL lamps. It contains a driver circuit for an external
half-bridge, an oscillator and a control circuit for starting up, preheating, ignition, lamp
burning and protection.
2. Features
I Adjustable preheat and ignition time.
I Adjustable preheat current.
I Adjustable lamp power.
I Lamp power independent from mains voltage variations.
I Overpower protection.
I Lamp temperature stress protection at higher mains voltages.
I Capacitive mode protection.
I Protection against a drive voltage that is too low for the power MOSFETs.
3. Quick reference data
Table 1. Quick reference data
Symbol
Parameter
High voltage supply
VFS high side supply voltage
Start-up state
VVS(start)
oscillator start voltage
VVS(stop)
oscillator stop voltage
IVS(standby) standby current
Preheat mode
fstart start frequency
tph preheat time
VRS(ctrl)
control voltage at pin RS
Frequency sweep to ignition
fB bottom frequency
tign ignition time
Normal operation
fB bottom frequency
tno non-overlap time
Conditions
IFS < 15 µA; t < 0.5 s
VVS = 11 V
CCP = 100 nF
Min Typ Max Unit
--
630 V
- 11.95 -
- 10.15 -
- 200 -
V
V
µA
- 108 -
- 666 -
- 600 -
kHz
ms
mV
- 42.9 -
- 625 -
kHz
ms
- 42.9 -
- 1.4 -
kHz
µs

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UBA2021 pdf, ピン配列
NXP Semiconductors
6. Pinning information
6.1 Pinning
UBA2021
630 V driver IC for CFL and TL lamps
FS 1
G1 2
S1 3
n.c. 4
VS 5
G2 6
PGND 7
14 CI
13 RHV
12 CF
UBA2021T 11 SGND
10 RREF
9 RS
8 CP
001aai566
Fig 2. Pin configuration (SO14)
FS 1
14 CI
G1 2
13 RHV
S1 3
12 CF
n.c. 4 UBA2021P 11 SGND
VS 5
10 RREF
G2 6
9 RS
PGND 7
8 CP
001aai567
Fig 3. Pin configuration (DIP14)
6.2 Pin description
Table 3.
Symbol
FS
G1
S1
n.c.
VS
G2
PGND
CP
RS
RREF
SGND
CF
RHV
CI
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
high side floating supply voltage
gate high transistor (T1)
source high transistor (T1)
high-voltage spacer, not to be connected
low voltage supply
gate low transistor (T2)
power ground
timing/averaging capacitor
current monitoring input
reference resistor
signal ground
oscillator capacitor
start-up resistor/feed-forward resistor
integrating capacitor
7. Functional description
7.1 Introduction
The UBA2021 is an integrated circuit for electronically ballasted compact fluorescent
lamps and their derivatives operating with mains voltages up to 240 V (RMS). It provides
all the necessary functions for preheat, ignition and on-state operation of the lamp. In
addition to the control function, the IC provides level shift and drive functions for the two
discrete power MOSFETs, T1 and T2 (see Figure 7).
UBA2021_4
Product data sheet
Rev. 04 — 25 July 2008
© NXP B.V. 2008. All rights reserved.
3 of 16


3Pages


UBA2021 電子部品, 半導体
NXP Semiconductors
UBA2021
630 V driver IC for CFL and TL lamps
Vin, the ripple is filtered out. The capacitor connected to the CP-pin is used for this
purpose. This pin is also used in the preheat state and the ignition state for timing (tph and
tign).
f
(kHz)
bottom
frequency
feed-forward
range
Fig 6. Feed-forward frequency
IRHV (mA)
mgs993
7.9 Capacitive mode protection
When the preheat mode is completed, the IC will protect the power circuit against losing
the zero voltage switching condition and getting too close to the capacitive mode of
operation. This is detected by monitoring voltage VRS at the RS-pin. If the voltage is below
VRS(cap) at the time of turn-on of T2, the capacitive mode operation is assumed.
Consequently the frequency increases as long as the capacitive mode is detected. The
frequency decreases down to the feed-forward frequency if no capacitive mode is
detected. Frequency modulation is achieved via the CI-pin.
7.10 IC supply
Initially, the IC is supplied from Vin by the current through RRHV. This current charges the
supply capacitor CS9 via an internal diode. As soon as VVS exceeds VVS(start), the circuit
starts oscillating. After the preheat phase is finished, the pin is connected to an internal
resistor Ri(RHV), prior to this the RHV-pin is internally connected to the VS-pin. The voltage
level at the RHV-pin thus drops from VVS + Vdiode to IRHV × Ri(RHV). The capacitor CS9 at
the VS-pin will now be charged via the snubber capacitor CS7. Excess charge is drained
by an internal clamp that turns on at voltage VVS(clamp).
7.11 Minimum gate-source voltage of T1 and T2
The high side driver is supplied via capacitor Cboot. Capacitor Cboot is charged via the
bootstrap switch during the on periods of T2. The IC stops oscillating at a voltage level
VVS(stop). Given a maximum charge consumption on the load at the G1-pin of 1 nC/V, this
safeguards the minimum drive voltages V(G1-S1) for the high side driver, see Table 1.
Table 4. Minimum gate-source voltages
FREQUENCY
< 75 kHz
75 kHz to 85 kHz
85 kHz
VOLTAGE
8 V (min)
7 V (min)
6 V (min)
The drive voltage at G2 will exceed the drive voltage of the high side driver.
UBA2021_4
Product data sheet
Rev. 04 — 25 July 2008
© NXP B.V. 2008. All rights reserved.
6 of 16

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共有リンク

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