參數(shù)資料
型號(hào)： S-8521C31MC-BTQ-T2
元件分類： 穩(wěn)壓器
英文描述： 0.05 A SWITCHING CONTROLLER, 75 kHz SWITCHING FREQ-MAX, PDSO5
封裝： SOT-23, 5 PIN
文件頁(yè)數(shù)： 4/43頁(yè)
文件大?。?/td> 488K
代理商： S-8521C31MC-BTQ-T2
STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR
S-8520 / 8521 Series
Rev.7.5_00
12
Seiko Instruments Inc.
Operation
1. Switching control method
1. 1 PWM control (S-8520 Series)
The S-8520 Series consists of DC-DC converters that employ a pulse-width modulation (PWM)
system. This series is characterized by its low current consumption. In conventional PFM system
DC-DC converters, pulses are skipped when they are operated with a low output load current, causing
variations in the ripple frequency of the output voltage and an increase in the ripple voltage. Both of
these effects constitute inherent drawbacks to those converters.
In the S-8520 series the pulse width varies in the range from 0 to 100% according to the load current,
yet ripple voltage produced by the switching can easily be removed by a filter since the switching
frequency is always constant. These converters thus provide a low-ripple voltage over wide range of
input voltage and load current. And it will be skippped to be low current consumption when the pulse
width is 0% or it is no load, input current voltage is high.
1. 2 PWM / PFM switching control (S-8521 Series)
The S-8521 series is a DC-DC converter that automatically switches between a pulse width
modulation method (PWM) and a pulse frequency modulation method (PFM), depending on the load
current, and features low current consumption.
The S-8521 series operates under PWM control with the pulse width duty changing from 25 to 100%
when the output load current is high. On the other hand, when the output current is low, the S-8541
series operates under PFM control with the pulse width duty fixed at 25%, and pulses are skipped
according to the load current. The oscillator thus oscillates intermittently so that the resultant lower
current consumption prevents a reduction in the efficiency when the load current is low.
The
switching point from PWM control to PFM control depends on the external devices (coil, diode, etc.),
input voltage, and output voltage. This series is an especially efficient DC-DC converter at an output
current of around 100
A.
相關(guān)PDF資料
PDF描述
S-8520B31MC-ARQ-T2 0.05 A SWITCHING CONTROLLER, 216 kHz SWITCHING FREQ-MAX, PDSO5
S-8520A28MC-AVN-T2 0.05 A SWITCHING CONTROLLER, 216 kHz SWITCHING FREQ-MAX, PDSO5
S-8520D27MC-BVM-T2 0.05 A SWITCHING CONTROLLER, 75 kHz SWITCHING FREQ-MAX, PDSO5
S-88502F-T1 5 V FIXED POSITIVE REGULATOR, PDSO8
S-88502F-T2 5 V FIXED POSITIVE REGULATOR, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-8521C31MC-BTQT2G 功能描述:DC/DC 開關(guān)控制器 3.1V Step-Dn PWM/PFM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK
S-8521C31MC-BXQ-T2 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS
S-8521C32MC-BTR-T2 功能描述:DC/DC 開關(guān)控制器 3.2V Step-Dn PWM/PFM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK
S-8521C32MC-BTRT2G 功能描述:DC/DC 開關(guān)控制器 3.2V Step-Dn PWM/PFM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK
S-8521C32MC-BXR-T2 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*