PBL38085 [ERICSSON]
Integrated circuit for transformerless driving of battery powered EL (electroluminicent) lamps; 集成电路的电池供电的EL （ electroluminicent ）灯变压器驱动
| 型号： | PBL38085 |
| 厂家： | 
ERICSSON |
| 描述： | Integrated circuit for transformerless driving of battery powered EL (electroluminicent) lamps |
| 文件： | 总4页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
July 1999
PBL 380 85
Integrated circuit for transformerless
driving of battery powered
EL (electroluminicent) lamps
Description.
Key features.
PBL 380 85 is a monolithic integrated circuit for supplying power to an EL
•
Minimum number of external
components for function: 1 choke, 1
filter-capacitor and 1 resistor.
(electroluminicent) lamp. This is intended to replace the LCD background illumination
system in battery powered handheld equipment with a low power EL- lamp. Especially
suitable for mobile phones where current saving is highly important, as background
illumination for both LCD and keyboard. Output voltage max. 190V, min. 170V at max.
2mA constant current charge / discharge of the EL- lamp. Application dependent
parameterssuchascharge/dischargecurrentaresetbyanexternalresistor.Twocontrol
signals are needed one for the switcher and one for the lamp.The output voltage is set
under170V bythedutycycleandtheswitchingfrequencyofthecontrolsignal, over170V
by an amplitude limiter that switches the switcher off. The switching frequency is app. 50
kHz. The light intensity is controlled by the dutycycle of the switcher control signal. The
lamp control signal is divided by two by the circuit. The wave form of the output AC-signal
is either triangular or trapezoid depending of the capacitance of the EL-lamp, charge /
discharge current and frequency of the lamp control signal.The triangular or trapezoid
wave form of the EL-lamp driving voltage and the high switching frequency minimizes
audible noise from the lamp and also reduces upcoming electrical noise and harmonics.
•
•
•
Easy adaption to various lamp
specifications.
Easy dimming function by
controlling the duty cycle.
Extensive current saving feature
compared with LEDs.
•
•
•
•
Power down function <<1µA.
Supply voltage down to 3V.
Comes in a 3x3 mm package
Lights up to 20nFlamp capacitance
area depending on lamp
parameter nF/cm2.
+supply
5
10
9
8
PBL 380 85
2
switcher control
signal
EL-lamp
PBL 380 85
6
4
3
1
Pekka 11.11-98
lamp control
signal
PBL 380 85
True size
10 - pin plastic mini SOP package
Functional diagram.
1
PBL 380 85
Maximum Ratings
Parameter
Symbol
Min.
0
Max.
90
Unit
V
Supply voltage, continuous
All inputs (zener protection)
Operating temperature range
Storage temperature range
V+
6.5
+85
+150
V
°C
°C
TAmb
TStg
-30
-55
Electrical Characteristics
At TAmb = 25°C V+ = 2.75 V if no otherwise stated. For further conditions see figure.
Parameter
Condition
Symbol
Min.
Typ.
Max.
Unit
Battery voltage
VBat
V+
1.5
2.4
3.6
2.75
5
65*
0.1
5.5
V
µA
V
V
BAT quiescent curren
V+ off
Logic supply voltage
V+ operating supply current
V+ quiescent supply current
Logic low level input voltage
Logic high level input voltage
Logic low level input current
SC + LC 50% 50%
SC = 0 ; LC = 0
µA
0.3xV+
V
V
µA
0.7xV+
-100
100
0.6
DC/DC converter:
Booster output voltage, int.limited
Switch transistor sat. voltage
Switching frequency, set by the
SC-signal frequency
90
50
V
V
80mA inductor current
kHz
H - BRIDGE:
Output voltage EL1 - EL2
Output unbalance voltage EL1 - EL2
Output sink/source current range
lower limit
Output sink/source current range
upper limit
170
-5
Vpp
V
+5
0.1
mA
mA
V
1.5
9.5
Output current x resistance product
( note1)
I
SET* RSET
10
10.5
Output drive frequency, set by the
LC-signal frequency
250
Hz
Note1: This product is the EL1/EL2 output current multiplied by the resistor value connected to ISET. Voltace at the ISET pin is
dependent of the V+ voltage asit is a quota of that voltage.
* Battery voltage max. 65V requires correctly chosen duty cycle and inductance.
2
PBL 380 85
GND
SC
1
2
3
4
5
L
10
9
C
I
SET
8
EL1
NC
EL2
7
LC
6
V+
10 pin plastic mini SOIC package
Pin configuration.
Pin Descriptions:
Refer to pin configuration.
SO
Name
Function
SO
Name
Function
1
2
3
4
5
GND
SC
Ground connection
6
7
EL2
NC
EL1
C
EL - lamp connection
Switch control input
No connection
ISET
LC
Control input for lamp driving capability
Lamp frequency control input
Supply voltage
8
EL - lamp connection
9
Boost capacitor connection
Inductor connection
V+
10
L
A
A
B
C
D
SC
LC
V
Bat
V+
22nF
series resistance
(ESR) < 1Ω
EL1
EL2
470µH
<5Ω
10
9
5
EL2
8
2
EL-lamp
4.7 nF
SC
PBL 380 85
6
EL1
4
1
3
Pekka 2.12-98
EL1-EL2
LC
Reference picture.
Some circuit curve forms .
3
PBL 380 85
10 - pin mini SOP
Dim.
A
millimeters
1.10
tol.
max.
+0.07
-0.08
B
0.23
C
0.18
±0.05
BSC
D
0.50
E
3.00
±0.1
E
F
F
4.90
±0.15
±0.15
G
H
0.55
3.00
0.10
3.0°
±0.1
±0.05
K
α
±3.0°
H
G
A
α
C
D
K
B
Information given in this data sheet is believed to be accurate and reliable. However no responsibility is assumed
for the consequences of its use nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Ericsson
ComponentsAB.TheseproductsaresoldonlyaccordingtoEricssonComponentsAB's generalconditionsofsale,
unless otherwise confirmed in writing.
Specifications subject to change without
notice.
1522-PBL 380 85/1 Uen Rev.A
© Ericsson Components AB
July 1999
Ordering Information
Ericsson Components AB
Package
Temp. Range
Part No.
S-164 81 Kista-Stockholm, Sweden
Telephone: (08) 757 50 00
www.ericsson.se/microe
10 pin plastic mini SOP -30 to 85°C PBL 380 85/1MSOT Tape and Reel
4
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