參數(shù)資料
型號： S-8520
廠商： Seiko Instruments Inc.
英文描述： PWM Control Step-Down Switching Regulator-Controller(PWM 控制，步降開關(guān)穩(wěn)壓器-控制器)
中文描述： PWM控制降壓型開關(guān)穩(wěn)壓控制器（脈寬調(diào)制控制，步降開關(guān)穩(wěn)壓器-控制器）
文件頁數(shù)： 29/30頁
文件大小： 650K
代理商： S-8520
28
Collection of Product FAQs
Author: Tachibana Midori
Date: 98/11/12 (Thursday), 10:17 (Modified: )
<Information level>
A:
Public (Printing O.K.)
Index:
B (Technical)
<Product>
Division name: 01 IC
Category 1:
11 Power Supply
Category 2:
4. Switching Regulators
Cal No.:
S-8520/21
Related documents:
Question:
At start-up, a large rush current flows from the input power source VIN. What countermeasures against
this do you recommend
Answer:
Waveform of rush current when ON/OFF=Lo
→
Hi
-6
-4
-2
0
2
4
-0.002
0.000
0.002
0.004
TIME
(sec)
0.006
0.008
0.010
0.012
Output voltage (V)
-1
0
1
2
3
4
Coil current (A)
VOUT
IL
Testing condition
VIN=5V
No RL
Conditions: S-8520B33, VIN=5V, No RL, Cout=47
μ
F
This shows the performance of IC. This IC includes a soft start-up circuit to ensure that the VREF
voltage in the IC rises slowly from 0V to the base voltage. As a result, the output voltage rises slowly,
suppressing the rush current at start-up.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-8520A20MC-AVFT2G 功能描述:DC/DC 開關(guān)控制器 Step Down SWR PWM 180kHz 60uA Iq 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-8520A21MC-AVG-T2 功能描述:DC/DC 開關(guān)控制器 2.1V Step-Down PWM 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-8520A21MC-AVGT2G 功能描述:DC/DC 開關(guān)控制器 2.1V Step-Down PWM 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-8520A25MC-ARK-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-8520A25MC-AVK-T2 功能描述:DC/DC 開關(guān)控制器 2.5V Step-Down PWM 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
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