參數(shù)資料
型號(hào)： 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(guān)穩(wěn)壓器)
中文描述： 的CMOS脈寬調(diào)制控制升壓開關(guān)穩(wěn)壓器（內(nèi)置開關(guān)）（烤瓷的CMOS（頻率脈沖調(diào)制）控制步升開關(guān)穩(wěn)壓器）
文件頁數(shù)： 51/65頁
文件大?。?/td> 569K
代理商： S-8323
50
Waveform 1
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
-1.0
1.0
3.0
5.0
7.0
-0.001
0.000
0.001
TIME
(sec)
0.001
0.002
0.002
CONT Voltage (V)
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Coil Current (A)
CONT
IL
Soft-start motion
Fault phenomenon
Q1 on
In the output-voltage boosting circuit shown in Figure 1, when the Vdd switch (Q1) comes on to initiate
voltage boosting, full-duty switching is observed prior to the soft-start motion, as can be seen in
Waveform 1, and a failure occurs, causing a large rush current to flow from VIN and the VIN voltage to
drop. This occurs if the VOUT terminal voltage falls (VIN x RB
÷
(RA+RB)) due to the addition of RA
and RB when the Vdd switch (Q1) comes on. As a result, an extended period is required to set the
output voltage of the internal error amplifier circuit. One means of preventing this malfunction of the
internal error amplifier circuit is turning off Q2 at the moment the Vdd switch (Q1) goes off, so that
VOUT will be made equal to the VDD level via RA, as shown in Figure 2. (Normally, RA and RB are cut
off in order to eliminate the reactive current generated when the power is switched off.)
GND
EXT
10uF
+
-
VSS
VOUT
Cin
SD
L
Tr1
S-8327E50
VDD
OUT
VIN
3.3V
150uH
15V
Cout
20uF
Figure 2
Q1
Internal
Circuit
RA
RB
CC
Coil current
CONT voltage
ON/OFF
ON/OFF
Q2
<Remarks>
FAQ No.: 11S8323011
相關(guān)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(guān)穩(wěn)壓器)
S-8324 CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關(guān)穩(wěn)壓器)
S-8328 CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關(guān)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(guān)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(guān)穩(wěn)壓器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-8323A27MC-ELH-T2 功能描述:開關(guān)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(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-8323A30MC-ELK-T2 功能描述:DC/DC 開關(guān)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(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-8323A33MC-ELN-T2 功能描述:DC/DC 開關(guān)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(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-8323A50MC-EME-T2 功能描述:開關(guān)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(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
S8324A10-8 制造商: 功能描述: 制造商:undefined 功能描述:
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