- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384455 > HV803X (SUPERTEX INC) High-Voltage EL Lamp Driver PDF資料下載
參數(shù)資料
| 型號： | HV803X |
| 廠商： | SUPERTEX INC |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | High-Voltage EL Lamp Driver |
| 中文描述： | EL DISPLAY DRIVER, UUC12 |
| 封裝： | DIE-12 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大小： | 80K |
| 代理商： | HV803X |
15-7
15
External Component Description
External Component
Selection Guide Line
Diode
Fast reverse recovery diode, 1N4148 or equivalent.
Cs Capacitor
0.01
μ
F to 0.1
μ
F, 100V capacitor to GND is used to store the energy transferred from the inductor. 0.01
μ
F is
recommended when driver has large EL lamps.
R
EL-osc
The EL lamp frequency is controlled via an external R
EL
resistor connected between R
EL-osc
and V
DD
of the
device. The lamp frequency increases as R
EL
decreases. As the EL lamp frequency increases, the amount
of current drawn from the battery will increase and the output voltage V
CS
will decrease. The color of the EL
lamp is dependent upon its frequency.
A 2M
resistor would provide lamp frequency of 300 to 430Hz. Decreasing the R
EL-osc
by a factor of 2, the
lamp frequency will increase by factor of 2.
R
SW-osc
The switching frequency of the converter is controlled via an external resistor, R
SW
between R
SW-osc
and V
DD
of the device. The switching frequency increases as R
SW
decreases. With a given inductor, as the switching
frequency increases, the amount of current drawn from the battery will decrease and the output voltage, V
CS
,
will also decrease.
C
SW
Capacitor
A 1nF capacitor is required on R
SW-osc
pin to GND when the input voltage is equal to or greater than 5V.
As the input voltage of the device increases, a faster switching converter frequency is required to avoid
saturating the inductor. With the higher switching frequency, more noise will be introduced. This capacitor
is used to shunt any switching noise that may couple into the R
SW-osc
pin.
The inductor L
x
is used to boost the low input voltage by inductive flyback. When the internal switch is on,
the inductor is being charged. When the internal switch is off, the charge stored in the inductor will be
transferred to the high voltage capacitor C
S
. The energy stored in the capacitor is then available to the internal
H-bridge and therefore to the EL lamp. In general, smaller value inductors, which can handle more current,
are more suitable to drive larger size lamps. As the inductor value decreases, the switching frequency of the
inductor (controlled by R
SW
) should be increased to avoid saturation.
560
μ
H Murata inductors with 14.5
series DC resistance is typically recommended. For inductors with the
same inductance value but with lower series DC resistance, lower R
SW
value is needed to prevent high current
draw and inductor saturation.
Lx Inductor
Lamp
As the EL lamp size increases, more current will be drawn from the battery to maintain high voltage across
the EL lamp. The input power, (V
IN
x I
IN
), will also increase. If the input power is greater than the power
dissipation of the package (350mW), an external resistor in series with one side of the lamp is recommended
to help reduce the package power dissipation.
Enable/Disable Configuration
The HV803 can be easily enabled and disabled via a logic control
signal on the R
SW
and R
EL
resistors as shown in Figure 4 below.
The control signal can be from a microprocessor. R
SW
and R
EL
are typically very high values. Therefore, only 10’s of microam-
1
7
2
3
4
8
6
5
V
DD
ON =V
DD
OFF = 0V
C
S
100V
0.1
μ
F
1nF
L
x
1N4148
R
SW
R
EL
5.1K
EL Lamp
HV803LG
L
x
GND
V
B
V
A
R
EL-osc
V
DD
R
SW-osc
C
s
+
-
Enable
Figure 4: Enable/Disable Configuration
peres will be drawn from the logic signal when it is at a logic high
(enable) state. When the microprocessor signal is high the
device is enabled and when the signal is low, it is disabled.
HV803
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HV8051 | High-Voltage EL Lamp Driver(輸入電壓1.0-1.6V,高壓電致反光燈驅(qū)動器) |
| HV8053 | High-Voltage EL Lamp Driver(輸入電壓2.4-3.5V,高壓電致反光燈驅(qū)動器) |
| HV809 | Off-Line High Voltage EL Lamp Driver(脫線高壓電致反光燈驅(qū)動器) |
| HV823 | High-Voltage EL Lamp Driver(輸入電壓2.0-9.5V,高壓電致反光燈驅(qū)動器) |
| HV823 | High Voltage EL Lamp Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HV8051 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:High-Voltage EL Lamp Driver |
| HV8051LG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ballast/Backlight Controller/Driver |
| HV8053 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:High-Voltage EL Lamp Driver |
| HV8053LG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ballast/Backlight Controller/Driver |
| HV809 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:Off-Line High Voltage EL Lamp Driver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。