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參數(shù)資料
| 型號(hào)： | S-8330 |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關(guān)穩(wěn)壓器) |
| 中文描述： | 升壓型開關(guān)LCD偏置電源穩(wěn)壓器（用于液晶偏置電源的步升開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 13/35頁 |
| 文件大?。?/td> | 324K |
| 代理商： | S-8330 |
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STEP-UP SWITCHING REGULATOR FOR LCD BIAS SUPPLY
S-8330/8331
Series Rev.2.8
12
Seiko Instruments Inc.
The contents of the register must be reset because they are uncertain when powering on. If the power off pin is ”L” level
and step-up operation stops, the contents of the register are held inside the electric volume by applying voltage of 2 V or
more between V
IN
to V
SS
. Data write and reset operation in the register are also available under this state. The register is
reset by setting VCLK to
"
H
"
and VSTRB to ”H. “ The output voltage is set to the minimum value. Power on under the state
where the power off pin is being set to “L.” Next, set VCLK to
"
H
"
and VSTRB to H to reset the contents of the register.
Then, start step-up operation under the state where the power off pin is being set to “H. “
Note If you start step-up operation without resetting the contents of the register after powering on, the maximum voltage is
output to V
OUT
, and the connected device or instrument may be broken or damaged. It is recommended to
connect a pull down resistor to the power off pin if a problem may occur due to the maximum output voltage.
Recommended Selection of Series Products and External Parts
1.
How to Select the Series Products
The S-8330/31 Series comes in three types depending upon the switching transistor attachment method (internal or
external) and the oscillating frequency. As shown in Figure 10, respective output current targets differ to ensure high
efficiency within the respective output current range. Select an appropriate series which meets your output current
requirements (see the reference data for the output current and efficiency characteristics).
S-8331A Series The switching transistor is externally attached and the oscillating frequency is 180 kHz (typ.). Its target
is the output current of 10 mA or more. High output voltage of 30 V or more is available by only
attaching a simple external circuit to the S-8331A Series (see the S-8330 Series application circuit
shown in Figure 17).
S-8330A Series The switching transistor is built in and the oscillating frequency is 180 kHz (typ.). Its target is the
output current ranging from 1 mA to 10 mA. The oscillating frequency of the S-8330A Series is
higher than that of the S-8330B Series. This minimizes ripple and ensures excellent transitory
response characteristics.
S-8330B Series The switching transistor is built in and the oscillating frequency is 50 kHz (typ.). Its target is output
current of 1mA or less. The self current consumption of the S-8330B Series is less than that of the
S-8330A Series. This ensures high efficiency in the output current of about 0.1 mA or less.
2.
Inductor
The inductance value greatly affects I
OUT
and efficiency .
Figure 11 shows the dependency of I
OUT
, of the S-8330A and the S-8330B on “L.”
S-8330B
S-8330A
A switch transistor is built
in
8V
30V
(f=180kHz)
(f=180kHz)
(f=50kHz)
S-8331
A switch transitor is
externally attached
1mA
10mA
100mA
Figure 10 S-8330/8331 Series Depending Upon Output Current
Output
Voltage
Output Current
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S-8331 | Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關(guān)穩(wěn)壓器) |
| S-8340 | PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制，高頻步升開關(guān)穩(wěn)壓器-控制器) |
| S-8340A | PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制，高頻步升開關(guān)穩(wěn)壓器-控制器) |
| S-8340B | PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制，高頻步升開關(guān)穩(wěn)壓器-控制器) |
| S-8341 | PWM/PFM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM/PFM控制，高頻步升開關(guān)穩(wěn)壓器-控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8330A20FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 8-20V 100uA 2.4% RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S-8330A20FS-T2-G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 8-20V 100uA 2.4% RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S-8330A22FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 10-22V 100uA 2.4% RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S-8330A22FS-T2-G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 10-22V 100uA 2.4% RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S-8330A24FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 12-24V 100uA 2.4% RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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