參數(shù)資料
型號(hào)： S-8324
廠商： Seiko Instruments Inc.
英文描述： CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開關(guān)穩(wěn)壓器)
中文描述： 的CMOS PWM / PFM切換，控制升壓型開關(guān)穩(wěn)壓器的CMOS（PWM / PFM切換控制步升開關(guān)穩(wěn)壓器）
文件頁數(shù)： 22/68頁
文件大?。?/td> 647K
代理商： S-8324
SMALL PACKAGE PWM/PFM CONTROL STEP-UP SWITCHING REGULATOR
S-8324/8328 Series
Seiko Instruments Inc.
21
5.
Voltage Inverting Type DC/DC Converter
The Start circuit is not needed because the power is supplied from V
DD
to the IC. Set V
IN
to 9V-|V
CC
| or less.
When V
CC
is -2 V, - 3 V and - 5 V, use the S-8324D20MC, the S-8324D30MC and the S-8324D50MC respectively. Always
connect V
OUT
to GND without attaching R
A
, R
B
.
Set R
b
to 60
or more and R
E
to 6 k
or less. The larger R
E
, the smaller the reactive current through R
E
and R
b
, allowing
the efficiency to be improved. On the other hand, the switching loss of the Tr becomes large and consequently the
efficiency will be worsend. Select R
E
to ensure high efficiency under operating conditions.
6.
Power Supply for GaAs and MR Head
The following are an application negative power supply circuit for GaAs and MR head, and its characteristics when 3V
(3V ±10%) and 5V (5V±10%) are used for the applied power. Set V
IN
to 9V-|V
CC
| or less.
Figure 25
(a)Output Current - Output Voltage
(b)Output Current - Efficiency
100
VIN=2.7V
VIN=3.0V
VIN=4.5V
VIN=5.0V
-3.05
-3.03
-3.01
-2.99
-2.97
-2.95
0.01
0.1
1.
10.
100.
Output Current I
OUT
(mA)
Output Voltage
V
OUT
(V)
VIN=2.7V
VIN=3.0V
VIN=4.5V
VIN=5.0V
0
20
40
60
80
0.01
0.1
1.
10.
(mA)
100.
Efficiency
η
(%)
Output Current I
OUT
Figure 24
V
DD
S-8324D30
-
C
IN
+
+
-
V
SS
V
OUT
C
OUT
R
E
R
b
CONT
V
IN
-3V
2SA1362/Toshiba
750
2k
A
CD54/100
μ
H
F93
47
μ
F
MA720
SD
V
CC
Figure 23
V
DD
S-8324D
-
C
IN
+
+
-
V
SS
V
OUT
C
OUT
R
E
R
b
CONT
V
IN
Tr
V
CC
R
B
R
A
相關(guān)PDF資料
PDF描述
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)
S-8340 PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制，高頻步升開關(guān)穩(wěn)壓器-控制器)
S-8340A PWM Control High-Frequency Step-Up Switching Regulator-Controllers(PWM控制，高頻步升開關(guān)穩(wěn)壓器-控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S8324A10-8 制造商: 功能描述: 制造商:undefined 功能描述:
S-8324A27MC-EOH-T2 功能描述:DC/DC 開關(guān)控制器 SOT-23-5 2.7V 17uA 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-8324A30MC-EOK-T2 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 REORD 628-8354H30MC 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-8324A33MC-EON-T2 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 SOT-23-5 3.3V 17uA 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-8324A50MC-EPE-T2 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 SOT-23-5 5.0V 17uA 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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