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參數(shù)資料
| 型號： | S-8323 |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | CMOS PWM-Control Step-Up Switching Regulator(Built-In Switch)(CMOS PFM（頻率脈沖調(diào)制）控制步升開關穩(wěn)壓器) |
| 中文描述： | 的CMOS脈寬調(diào)制控制升壓開關穩(wěn)壓器（內(nèi)置開關）（烤瓷的CMOS（頻率脈沖調(diào)制）控制步升開關穩(wěn)壓器） |
| 文件頁數(shù)： | 46/65頁 |
| 文件大?。?/td> | 569K |
| 代理商： | S-8323 |
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4
5
Collection of Product FAQs
Author: Tachibana Midori
Date: 98/11/12 (Thursday) 10:17 (Modified:)
<Information level>
B:
For Distri & Rep (Printing N.G.)
Index:
B: Technical
<Product>
Division name: 01 IC
Category 1:
11 Power Supply
Category 2:
4. Switching Regulators
Cal No.:
S-8323/24/27/28
Related Documents:
Question:
What about the soft-start mechanism of the S-8323/24/27/28
Answer:
The soft-start function has been added to prevent overshoot of the output voltage when the boosting
operation is initiated, and to suppress the rush current during voltage increases. The following are
among the soft-start methods available:
Placing a current limit on the switching current
Slowly increasing the reference voltage
Limiting on-duty at the start
This IC adopts method above.
The waveforms observed when the S-8327B30 is soft-started are shown below. As reference voltage
VREF within the measurement circuit is increased slowly from 0 V, output voltage VOUT also slowly
increases. [Vref indicated with dotted lines in the waveform is the value obtained when reference
voltage VREF is converted to an output voltage VOUT level (Vref = VREF x (R1 + R2)
÷
R2).]
VOUT increases to close to VIN immediately after the power is switched on, as the current is supplied
from VIN to VOUT via L and SD of the measurement circuit. Moreover, the soft-start function
implemented by an output-power regulation circuit allows an extended soft-start time to be ensured
when a large external Cc is selected.
(Refer to FAQ No. 11S8323007.)
Measurement Circuit: S-8327B30 VIN = 0
→
1.8 V IOUT = 1 mA
相關PDF資料 |
PDF描述 |
|---|---|
| S-8327 | CMOS PWM-Control Step-Up Switching Regulator(External Transistor)(CMOS PFM（頻率脈沖調(diào)制）控制步升開關穩(wěn)壓器) |
| S-8324 | CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關穩(wěn)壓器) |
| S-8328 | CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關穩(wěn)壓器) |
| S-8330 | Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關穩(wěn)壓器) |
| S-8331 | Step-Up Switching Regulator For LCD Bias Supply(用于LCD偏置電源的步升開關穩(wěn)壓器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S-8323A27MC-ELH-T2 | 功能描述:開關變換器、穩(wěn)壓器與控制器 REORD 628-8353A27MC 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S-8323A30MC-ELK-T2 | 功能描述:DC/DC 開關控制器 3.0V 17.2uA 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8323A33MC-ELN-T2 | 功能描述:DC/DC 開關控制器 3.3V 19.1uA 2.4% RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| S-8323A50MC-EME-T2 | 功能描述:開關變換器、穩(wěn)壓器與控制器 REORD 628-8353A50MC 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| S8324A10-8 | 制造商: 功能描述: 制造商:undefined 功能描述: |
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