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參數(shù)資料
| 型號： | S-8331 |
| 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)： | 12/35頁 |
| 文件大?。?/td> | 324K |
| 代理商： | S-8331 |
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STEP-UP SWITCHING REGULATOR FOR LCD BIAS SUPPLY
Rev.2.8
S-8330/8331
Series
Seiko Instruments Inc.
11
3. Electric Volume
The S-8330/31 series incorporates an electric volume with an 8-bit shift register and an 8-bit latch. The output voltage is
variable in the width of 12 V. The output voltage can be held in the data transmission mode because the data read in the
shift register is fetched into the latch by unshyncronized strobe input. Figure 8 shows a block diagram and timing charts
.
Figure 8 Block Diagram and Timing
VDIN: Inputs data to the electric volume.
”Data 1” is input at “H”level; ”Data 0” is input at ”Low” level.
VCLK: Inputs clock to the electric volume.
Fetches data at VDIN pin into the shift register at the rising edge of clocks. When clocks of over 8 bits are input,
the read data is shifted in succession for each clock, and data corresponding to 8 bits which was input lastly is
valid.
VSTRB: Inputs strobe signal.
The contents of the shift register are latched by turning the strobe signal to ”H. ” When the data fetched into the
latch is directly transmitted to the electric volume, the output voltage changes. Data in the latch is held by turning
the strobe signal to ”L. ”
The electric volume has 8-bit resolution. An error
in linearity may exceed ±1/2LSB (±23.5 mV) only
before or after data changeover of 127
←→
128
(01111111
←→
10000000) (see Figure 9).
The error in linearity corresponds to 6 bits (±93.8
mV) when used in the 12 V variable range.
In an application where the variable range of
output voltage is 6 V or less, it is possible to use it
with high linearity accuracy with appropriate product
selection. For example, if you want to change output
voltage within the range from 12 V to 18 V, select the
S-8330A24FS and use it within the range of
0
←→
127 (00000000
←→
01111111). If so, high
linearity accuracy (within±1/2LSB) can be obtained.
8-bit
Shift Register
RESET
VOUT
VSTRB
VCLK
VDIN
8-bit
Latch
Electric
Volume
D0
D1
D2
D3
D4
D5
D6
D7
(LSB)
Read
Setting
value
Min. value
VOUT
VSTRB
Hold
Reset
Hold
VCLK
VDIN
(MSB)
±
2LSB
(
±
93.8mV)
±
1/2LSB
(
±
23.5mV)
Output Voltage
(V)
Electric
Volume
Data (DEC)
254 255
128
127
0
1
±
1/2LSB
Figure 9 Linearity Accuracy
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8331A20FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 8V-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-8331A20FS-T2-G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 8V-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-8331A22FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 10V-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-8331A22FS-T2-G | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 10V-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-8331A24FS-T2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 12V-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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