EFS21-TL5 [STMICROELECTRONICS]
STARLIGHT-KIT; STARLIGHT -KIT
| 型号： | EFS21-TL5 |
| 厂家： | 
ST |
| 描述： | STARLIGHT-KIT |
| 文件： | 总14页 (文件大小：227K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EFS
STARLIGHT-KIT
2-CHIPS SET FOR FLUORESCENT LAMP STARTER
Application Specific Discretes
A.S.D.
FEATURES
n
n
n
n
n
VERY WIDE TEMPERATURE RANGE:
tube ignition from - 30 to + 85 °C
SINGLE SHOT IGNITION FROM -30 to 0°C :
350mA, 1350V striking pulse
VERY WIDE POWER RANGE:
Fluorescent tube lamp ignition from 18 to 70W
EFS2B driver compatible with 50/60Hz
operation
SELECTABLE PREHEAT TIME:
EFS2A driver: 1.5s or 2.56s (50Hz)
EFS2B driver: 0.74s or 1.24s (50Hz)
EFS2B driver: 0.62s or 1.03s (60Hz)
S014
EFS2A-CD
EFS2B-CD
n
n
8 STRIKING PULSES CAPABILITY:
for very cold environment or ageing lamp
STARTER SHUTDOWN WITH FAILED LAMP
BENEFITS
n
n
n
n
Very low component count: 2 chips + 7 passive
components
Meet EN55015 standards WITHOUT EMI
capacitor
Extended life time of the fluorescent lamp due to
smooth and single shot ignition
High inherent reliability and extended life time
of the starter
PENTAWATT HV
EFS21-TL5
DESCRIPTION
The EFS Kit is a 2 chips set used with 7 additional
passive components, for Glow switch Starter.
The ASD
(Application Specific Discretes)
includes a bi-directional Power Switch and a
Power Supply for the driver.
The driver provides a program to ensure a fully
optimised linear fluorescent lamp ignition.
TM : ASD is trademark of STMicroelectronics.
May 2000 - Ed: 5A
1/14
EFS
PIN CONNECTION (top view)
SO14
Pentawatt HV
State tube detection
Preheat select
to be grounded
Shunt
1
2
3
4
5
6
7
14 G1
G1
Vcc
1
2
13 G2
12 VCC
11 GND
Tube
3
GND
G2
4
5
to be grounded
to be grounded
to be grounded
10
9
to be grounded
DO NOT CONNECT
to be grounded
8
DRIVER: EFS2A-CD
and : EFS2B-CD
ASD : EFS21-TL5
EFS STARLIGHT-KIT PARTS SELECTION:
The EFS STARLIGHT-KIT answers effectively to linear fluorescent lamp ignition needs:
MAINS FREQUENCY
50Hz
60Hz
DRIVER VERSION
Pin 2 connection
EFS2A
EFS2B
GND
1.5s
VCC
GND
VCC
1.24s
GND
VCC
PREHEAT DURATION
ASD
2.56s
0.74s
0.62s
1.03s
EFS21
LAMP POWER RANGE
AMBIENT TEMPERATURE RANGE
18 to 70W (note 2)
-30 to 85°C (note1, note 2)
Note 1: below -20°C, it is recommended to limit the lamp power range to 58W.
Note 2: the ignition temperature range is given with starting aid, as required in the IEC 81 and IEC 926 (§6.3.1) standards.
BASIC APPLICATION DIAGRAM
BALLAST
150KΩ
ASD
DRIVER
MAINS
3
FLUORESCENT
LAMP
14
1
5
2
4
13
U1
18W TO 70W
U2
12
DO NOT
CONNECT
9
4
R
7/8/10/11
2/3/5/6
1
22µF - 16V
0.39Ω
2/14
EFS
RECOMMENDED LAMP POWER RANGE APPLICATION
LAMP POWER (W)
70 W
58 W
WORKING AREA
36 W
18 W
-30 -20
-10
0
10
20
30
40
50
60
70
80
90
Tamb(°C)
(see note 2)
Note 2: the ignition temperature range is given with starting aid, as required in the IEC 81 and IEC 926 (§6.3.1) standards.
ABSOLUTE RATINGS (limiting values)
Symbol
Top
Parameter
Operating Junction temperature range
Storage temperature range
Value
Unit
-30 to +125
-55 to +150
°C
°C
Tstg
DRIVER: EFS2 A & EFS2B
Symbol
Parameter
Value
14
Unit
V
Vcc
Ptot
ESD
Maximum supply voltage
Power dissipation
500
1
mW
kV
Electrostatic discharge between any pins
Standard: MIL STD 883C Human Body Model
Input operating range
VSENSE
±10
V
ASD : EFS21
Symbol
Parameter
RMS on-state current Tcase = 90°C
IT(RMS) = 1A tOFF = 0.16s tON = 0.75s
Value
1
Unit
A
IT(RMS)
Tcase
ITSM
+ 120
15
°C
A
Surge peak on-state current
Tj initial = 25°C, tp = 10ms
Minimum repetitive rate periode : 1min.
Repetitive peak off-state voltage
VDRM
VRRM
600
V
3/14
EFS
ELECTRICAL CHARACTERISTICS (Tj = 25°C, unless otherwise specified)
DRIVER
Symbol
Vcc
Parameter
Supply voltage in preheat mode
Min.
Typ. Max. Unit
7
12
5
V
V
Under voltage lock-out threshold
Supply limitation high in standby mode
Supply limitation low in standby mode
Supply current in standby mode
Ignition current level Rsense = 0.39Ω
VUVLO
VCCH
VCCL
ICC
6.8
6.77
440
280
7.7
7.57
450
350
8.7
8.41
475
420
V
V
µA
mA
ISO
LAMP OFF STATE DETECTION
Checking delay after zero crossing lamp voltage
tc
EFS2A version
2.9
2.5
5.9
7.5
ms
ms
V
EFS2B version
VREF
Internal reference voltage
1.12
1.26
ASD
Symbol
VT +
VT -
Parameter
Positive on-state voltage IT = 1.5A
Negative on-state voltage IT = 1.5A
Min.
Typ. Max. Unit
tp = 500µs
tp = 500µs
2.1
3.15
1.2
V
V
V
V
0.89
VBR
Breakdown positive voltage IDRM = 5mA tp = 10ms
1200 1350 1500
800
VDCM
VRCM
Non repetitive peak off-state voltage
Pin 1 = Pin 2 = Pin 4 = Pin 5 Repetitive rate : 3Hz
IDRM
IRRM
Leakage current, at VDRM/VRRM rated
Pin 1 = Pin 2 = Pin 4 = Pin 5
20
µA
IH
Holding current dI/dt = 9 A/ms
Pin1 = Pin 2 = Pin4 = Pin5
350
mA
ORDERING INFORMATION
DRIVER
ASDTM
EFS
2
A/B
-
CD
EFS
2
1
-
TL5
Electronic
Fluorescent
Switch
Kit
Version
Digit
A: 50Hz
B: 50/60Hz
SO14
Package
Electronic
Fluorescent
Switch
Kit
Version
Digit
TL5:
Pentawatt HV Package
with lead forming
4/14
EFS
DEMONSTRATION BOARD DIAGRAM
THERMAL
FUSE
R1
R2
D1
R4
R3
R6
ASD
3
1
5
2
14
13
12
DRIVER
4
4
U1
U2
4
Vcc
9
OPEN
one of the tracks
2
C1
7/8/10/11
3/5/6
GND
R5
When the starter has to be protected against over-temperature, over-current or short circuit, it is
recommended to implement a thermal fuse in series with the starter.
To meet (IEC 926) standards, a capacitor (f.i. 5nF) can be connected between pin 3 and pin 4 of the ASD.
PCB with Pentawatt HV and SO14
BOARD ASSEMBLY
DRILL and CUT the track
for SHORT preheat -->
for LONG preheat -->
Pin 2 is the preheat time select pin. To select a short preheat time, drill to cut the Vcc to pin 2 track at the
metallic hole. To select a long preheat time, drill to cut the GND to pin 2 track. The layout must be
configured for either choice to avoid supply short circuit.
RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS
Application Conditions
AC mains
Single
230V - 50Hz
Single
120V - 60Hz
Twin series 230V / 50Hz or
single 115V / 50Hz
Lamp Power Range
18 to 70W
-30 to + 85°C (note 3)
Recommended Components
EFS21
EFS2B
18 to 36W
Ambient Temperature Range
ASD version
Driver version
EFS2A or EFS2B
EFS2A or EFS2B
15kΩ - 0.125W - 5%
130kΩ - 0.125W - 5%
3.3kΩ - 0.25W - 5%
R1, R2
R3
30kΩ - 0.125W - 5%
R4
2.2kΩ - 0.25W - 5%
R5
0.39Ω - 0.25W - 5% (note 4)
0.39kΩ - 0.25W - 5%
22µF - 16V - 20%
BYD17K (800V)
R6
C1
C2
Note 3: below -20°C, it is recommended to limit the lamp power range to 58W.
Note 4: R5(Rsense) should have a 8 A, 10 ms surge capability.
5/14
EFS
EFS STARLIGHT-KIT APPLICATION NOTE
1/ THE AC POWER SWITCH: FUNCTIONAL DESCRIPTION
he Starter is a bi-directional switch which performs two functions:
n
the preheat of the tube,
the ignition of the tube.
n
BALLAST
PREHEAT
FLUORESCENT
TUBE
V strike
1
2
220V / 50HZ
3
The mains voltage is applied
Preheating of the tube
Striking of the tube
During the preheat period, the ASD
is fully
Striking pulse
conducting. The tube lamp is short circuited by the
starter, and the current flows through its filaments.
In these conditions, the lamp can not light up, but
the temperature of the lamp electrodes increases.
At the end of the preheat period, lamp filaments
are warm enough to emit electrons in the gas and
to permit the lamp ignition in good conditions. The
ASD switches off the preheating current . At this
moment, the ballast is equivalent to a current
generator (I=ISO, ISO = Switched Off current). As
the ASD
switches off, the starter voltage
increases. The amplitude of this high voltage spike
is then clamped by the ASD (VBR′1350 V). As
the starter and the lamp are in parallel, the striking
pulse is directly applied to the lamp. The
electromagnetic energy of the ballast is then
discharged through the lamp and the ASD .
NEW EFS ASD
2/ WHAT’S NEW IN THIS SWITCH?
The AC SWITCH merges an auxiliary power
supply for the driver, a power clamping device
(1350V) and a bi-directional switch with his
execution pilot block.
TUBE
G1
ON / OFF
DRIVER
G2
Power supply
Vcc
GND
6/14
EFS
Conventional discrete circuit (minimal version)
Present solutions work with a unidirectional
switch, like MOS transistors or GTO (Gate Turn
Off thyristor). As a starter is a bi-directional switch,
it is necessary to use a rectifier bridge (4 diodes of
1500V ). More, 2 or 3 diodes in series with the
GTO are required to get the necessary switch off
effect, and the whole is controlled with an analog
timer built around a small SCR.
1500V
GTO
The interest of a bi-directional switch arises itself:
a drastic reduction of the number of components,
and of course, a reduction of power losses (only 1
forward voltage instead of 5).
SCR
3/ LAMP IGNITION FEATURE:
A lamp requires a minimum energy level to be ignited, but this energy depends especially on the lamp
temperature. The lower the temperature is, the more energetic the lamp strike is.
2
L.ISO
This energy stored in the ballast is directly proportional to the Switched Off currentISO (E =
).
2
In other words, the required energy and of course the ISO level, are maximum for the minimum
temperature. Results based on experiments show that it is necessary to switch off a current of 350 mA to
strike a 58W tube at -30°C (with a voltage amplitude clamped at 1200V and starting aid).
Therefore, the best way to strike a tube independently of the temperature is to keep the maximum ISO level
for all the temperature range. Unfortunately, the solution is not so simple to implement because the energy
level at ambient or warm temperature would be much important: the lamp would be ignited, but the lamp
lifetime would be shortened. This is why one of the innovations of the ASD is to modulate the striking
energy versus temperature (see feature hereafter).
I.S.O.
Switched off current
350mA
versus ambient temperature
200mA
A.S.D. FEATURE
For freezing temperatures, the ISO level is maintained at 350 mA, and for positive temperatures, the ISO
level decreases slowly.
7/14
EFS
POWER SUPPLY SCHEMATIC
4/ AUXILIARY POWER SUPPLY:
R2
R1
In order to reduce the number of components, an
auxiliary power supply is integrated in the ASD .
This active power supply works directly on the
mains and requires only a low voltage capacitor
16V - 22µF. The operating mode of this supply
varies with the starter operating phase:
D1
ASD
TUBE
R6
DRIVER
G1
7.68
7.57
VCC
GND
C SUPPLY
Supply operation during preheat phase:
During preheat phase, the driver manages alone the supply function (neither the driver nor D1 and R6 are
involved). A part of the current flowing through the ASD is used, at the beginning and at the end of each
positive mains half cycle, to charge the output capacitor.
Supply operation during standby phase:
When the lamp is lit, the monitors its supply voltage (Vcc). At the beginning of each positive mains half
cycle, when Vcc is lower than 7.57V, the driver closes the ASD supply switch. The capacitor is charged
to provide the standby current of the driver. During this phase the tube lamp is short circuited by the
ASD . When the supply voltage reaches 7.68V, the driver opens the ASD supply switch. Since this
current is also flowing in the ballast, the supply turn off provides across the lamp an additional voltage
spike. After running few minutes the lamp becomes warm and this spike voltage naturally decreases.
SUPPLY DURING STANDBY PHASE
(Without E.M.I. Capacitor nor R6 nor D1)
SUPPLY DURING PREHEAT PHASE
Starter current
at the ignition
5min after
ignition
Starter voltage
To reduce dramatically this repetitive voltage spikes across the lamp, the R6 resistor with the diode D1
provide a part of the supply current. Thus, the ripple voltage of the supply voltage is reduced, as well as the
level of the switched off current. On the other hand, this increases the safety margin of the RF noise
(versus the IEC 55015 limits)
8/14
EFS
5/ THE DRIVER: FUNCTIONAL DESCRIPTION
EFS2A DRIVER Internal block diagram (50Hz operation)
State tube detection
(Striked / Off)
State
tube
Clock 1/8
Pre-heat
1,5s
or
2.5s
Preheat
Select
Shunt
0 current synchro
period
counter
ISO synchro
350mA
8 attempts
Strikes counter
Current generator
30mA
G 2
G 1
UVLO
Minimum
Power supply
Vcc
GND
ALGORITHM
1. At switch on:
At switch on, an integrated Under Voltage Lock Out function (UVLO) resets the driver as long as the supply
voltage stays below a safety level.
2. Preheat:
AC MAINS ON
The ignition sequence begins with the preheat
UVLO
RESET
phase. Two different duration’s can be selected with
PIN 2 (see table EFS STARLIGHT-KIT PARTS
SELECTION page 2).
Preheat
1.5s or 2.5s
*
During this phase, the driver maintains the ASD in
a full ON-state making the starter equivalent to a
bi-directional conducting switch.
Strike
3. Ignition of the fluorescent tube:
Attempt = Attempt + 1
At the end of the preheat period, the starter strikes
the fluorescent lamp.
Preheat
0.75s or 1.25s
*
Loop 2
Tube
Ignited?
YES
For that, the driver reads continuously the current
through the starter. When the current reaches the
Switch Off level (ISO = 350mA), the driver turns off
the ASD . This induces a high voltage pulse across
the lamp. This pulse amplitude is limited by the
ASD (′1350V).
YES
Loop 3
NO
Fail = Fail + 1
Attempt <8
NO
Autosupply
Loop 1
NO
Fail = 0
Fail = 8
Attempt = 0
4. If the lamp fails to strike:
YES
Fail = 0
Autosupply
The driver detects the state of the tube (lit or off). If it
stays off during 8 mains cycles (loop 1), a new
preheat period, shorter than the first one, starts
again (loop 3), followed by a new ignition attempt.
The driver will try to fire the tube 8 times. If none of
* see the preheat duration table § 6
the 8 attempts succeeds in striking the lamp, the driver turns in standby mode, and the whole starter is fully
stopped until the next mains removal and power supply reset.
5. If the lamp is ignited:
If the lamp is ignited, the driver stays in standby mode while monitoring the state of the lamp (loop 2).
During normal operation of the tube, this short pulse is masked by the lamp conduction. If the mains
interruption is really long enough to turn off completely the lamp, a new ignition sequence starts again (loop
3) with 8 other new possible attempts.
9/14
EFS
6/ PREHEAT PHASE DURATION 50-60Hz:
The driver determines the preheat duration by counting mains cycles. This numeric solution brings
naturally a good precision depending only on the mains frequency tolerance.
With the 2 driver versions, the EFS startlight-kit provides a choice of 4 preheat duration’s. The following
table gives the preheat duration before the first ignition attempt. The seven next preheat duration’s, in case
of unsuccessful ignition attempt, last the half of the first one
PREHEAT DURATION
MAINS FREQUENCY
DRIVER VERSION
Pin 2 connection
50Hz
60Hz
EFS2A
EFS2B
GND
0.74s
EFS2B
GND
1.5s
VCC
2.56s
VCC
GND
0.62s
VCC
1.24s
1.03s
7/ TUBE STATE DETECTION:
During the ignition sequence or once the lamp is lit, the starter checks the state of the lamp (lit or off).
To determine this state, the driver reads the lamp voltage through the resistor bridge (R1+R2+R3, R4).
- If the lamp is off, its voltage equal the mains voltage.
- If the lamp is lit, its voltage is only 80 V (for a 58W lamp).
Thus the lamp state is determined by comparison of the lamp voltage with a programmed detection level.
CORRECT SETTING = NO WAVEFORM
ACROSS THE GREY AREA
Tolerance effects:
Tolerances on resistors (R1, R2, R3 and R4) as
well as on the integrated comparator bring a
tolerance on the set detection level. Thus the
detection level is included in a range delimited by
the maximum and the minimum detection levels
(DLMAX DLmin).
OFF Lamp
Voltage
DL
MAX
DL
min
The driver checks the state of the lamp when
mains voltage is maximum, that is to say 5 ms after
the zero crossing mains voltage (50Hz). Here
again internal tolerances bring a tolerance on the
real checking moment (TCmin TCMAX).
LIT Lamp
Voltage
TCmin
TCMAX
How to set the detection level?
Only the R4 resistor value can be set to adjust the detection level. Values of resitors R1 to R3 must match
values of the table RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS of
the page 5. Practically the R4 resistor value has to be set so that neither the OFF lamp voltage nor the LIT
lamp voltage cross the grey area.
The DLMAX and DLmin limits can be calculated as follows:
1.265 x (R4 min + R1MAX + R2MAX + R3MAX
)
1.122 x (R4MAX + R1min+ R2 min+ R3 min)
DLMAX
=
and DLmin =
R4 min
R4MAX
10/14
EFS
8/ E.M.I. CAPACITOR:
As required in the IEC 926 standard (§11.5),
“starters which are interchangeable with glow
starters in accordance with IEC 155 shall contain
means for radio interference suppression, the
effect of which is equivalent to that of the radio
interference suppression capacitor prescribed in
7.12 of IEC 155”.
ASD
DRIVER
14
13
12
1
5
2
3
9
C
E.M.I.
The EFS starlight-kit is compatible with this 5nF
E.M.I. Capacitor which must be connected directly
across the ASD (between pin 3 “TUBE” and pin
4 “GND”).
7/8/10/11
2/3/5/6
4
1
4
Rsense
On the other hand, this E.M.I. capacitor increases
the striking pulse width of about 55% on positive
temperatures.
8.1. Operation in single lamp configuration
The EFS STARLIGHT-KIT is ideal in the following configurations:
- Single Starter / 230V / 50Hz - Single Starter / 230V / 60Hz - Single Starter / 120V / 60Hz
T
U
B
E
AC
MAINS
Note 4: the different driver versions should be chosen according to the table “EFS STARLIGHT KIT PARTS SELECTION” page 2.
Note 5: Components to choose are listed in the table “RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS”
page 5.
8.2. Operation with capacitor for power factor correction:
The EFS STARLIGHT-KIT is also suitable for magnetic ballast including front end parallel capacitor.
The EFS STARLIGHT-KIT is NOT suitable for magnetic ballast including front end serial capacitor.
LEADING MAGNETIC BALLAST WITH
SERIAL CAPACITOR
MAGNETIC BALLAST WITH SHUNT
PARALLEL CAPACITOR
T
U
B
E
T
U
B
E
AC
MAINS
11/14
EFS
8.3. Operation on the 230V/50Hz AC mains in twin tubes configuration
The EFS STARLIGHT-KIT is also suitable for the configurations Twin tubes Starter
Note 5: Components to choose are listed in the table “RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS”
page 5.
The only electrical diagram difference consists of the R4 resistor which needs to be changed from 1 to
2.2kΩ. Without this modification, the starter will generate only one ignition attempt instead of 8 in case of
defective lamp; the loop 3 is removed from the algorithm described in page 9.
AC
BALLAST
MAINS
TWINTUBE
230V
STARTER
Rotate of 180°
ALIGHT
ALIGHT
only one starter
T
T
U
B
E
U
B
E
230V / 50HZ
SOCKET
FLUORESCENT
TUBE
In the Twin Series 230V/50Hz configuration, the polarity of the two starters must be respected:
In case of no operation of starters, rotate one of the starters of 180° on its socket.
12/14
EFS
PACKAGE MECHANICAL DATA
SO14 (Driver)
Millimeters
Inches
Dim.
Min. Typ. Max. Min. Typ. Max.
A
a1
a2
b
1.75
0.069
0.008
0.063
0.018
0.010
0.1
0.2 0.004
1.6
G
L
c1
C
a2
A
0.35
0.46 0.014
0.25 0.007
b
e
b1 0.19
S
b1
a1
e3
D
E
C
0.5
0.020
c1
45o (typ.)
8.75 0.336
6.2 0.228
M
D
E
8.55
5.8
0.334
0.244
8
7
14
1
e
1.27
7.62
0.050
0.300
F
e3
F
3.8
4.6
0.5
4.0 0.150
5.3 0.181
1.27 0.020
0.68
0.157
0.208
0.050
0.027
G
L
M
S
8o (max.)
13/14
EFS
PACKAGE MECHANICAL DATA
Pentawatt HV with lead forming - TL5 (ASD )
DIMENSIONS
Millimeters
Min. Typ. Max. Min. Typ. Max.
REF.
Inches
A
C
D
4.3
1.22
2.4
4.8 0.169
1.42 0.048
2.8 0.094
3.85 0.144
0.45 0.014
0.75 0.026
5.28 0.192
7.82 0.292
10.4
0.188
0.056
0.110
0.152
0.018
0.030
0.208
0.308
0.409
0.409
DIAM 3.65
E
0.35
0.65
4.88
7.42
F
G1
G2
H2
H3 10.05
L1
10.4 0.396
3.3
0.130
L2 14.24
14.64 0.560
2.74 0.092
0.576
0.108
0.118
0.622
0.260
L3
L5
L6
L7
R
2.34
2.6
15.1
6
3
0.102
15.8 0.594
6.6 0.236
0.5
0.020
Information furnished isbelieved to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of
use of such information nor for any infringement of patents or other rights of third parties which mayresult from its use. No license is granted by
implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap-
proval of STMicroelectronics.
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14/14
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