- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299876 > S-8328J25MC-F2F-T2 0.3 A SWITCHING CONTROLLER, 287.5 kHz SWITCHING FREQ-MAX, PDSO5 PDF資料下載
參數(shù)資料
| 型號： | S-8328J25MC-F2F-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.3 A SWITCHING CONTROLLER, 287.5 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁數(shù)： | 14/65頁 |
| 文件大小： | 759K |
| 代理商： | S-8328J25MC-F2F-T2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當(dāng)前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁
SMALL PACKAGE PWM/PFM CONTROL STEP-UP SWITCHING REGULATOR
Rev. 7.2-10
S-8324/8328 Series
Seiko Instruments Inc.
21
4.2. Enhancement MOS FET Type
5. Others (S-8324D/J and S-8328E/J only)
The S-8324D/J and S-8328E/J are applicable to the following uses because the power pin for IC chip and Vout pin for output
voltage are separated:
When changing the output voltage with an external resistance.
When outputing the high voltage such as +12 V or 15 V.
When making the step-down DC/DC converter.
When making the inverted DC/DC converter.
Choose the products in the following table according to applications for
to
.
Use
Step-up
Step-down
Output voltage VCC
2V
≤VCC<3V 3V≤VCC<5V 5V≤VCC<9V
9V
≤VCC
Ref. circuit
2V
≤VCC<3V 3V≤VCC<5V 5V≤VCC<9V
Ref. circuit
S-8324D20
Std. circuit (5)
Appl. circuit 3
S-8324D30
Std. circuit (5)
Appl. circuit 3
S-8324D50
Std. circuit (5)
Appl. circuit 3
S-8324J25
Std. circuit (5)
S-8324J50
Std. circuit (5)
S-8328E20
Std. circuit (6)
S-8328E50
Std. circuit (6)
S-8328J25
Std. circuit (6)
S-8328J50
Std. circuit (6)
Connection to VDD pin
VIN or VCC
VIN
VIN
The operational precautions are follows:
I. This IC starts to oscillate and step up operation at VDD=0.8V(1.3V for J-type) but frequency of the oscillator does not stabilize.
Input the voltage from 2 V to 9 V for VDD pin to get the stabilized output voltage and oscilation frequency.
The input voltage from 2 V to 9 V for VDD pin allows the connection of VDD pin to both input power pin VIN and output power pin
Vout.
II. Choose external resistors RA and RB not to affect to the output voltage with the consideration of the impedance between VOUT
and VSS pins in the IC chip.
Internal resistance between VOUT and VSS pins are as follows:
S-8324D20, S-8324J20, and S-8328E20: 3.0 M
to 19.6 M
S-8324J25, S-8328J25: 3.9 M
to 22.5 M
S-8324D30: 3.3 M
to 22.6 M
S-8324D50, S-8324J50, S-8328E50, and 8328J50: 2.1 M
to 19.1 M
III. Attach the capacitor “CC” in parallel to RA resistance when the oscilation of the output voltage occurs.
Caluculate “CC” from the following formula:
Figure 9 Circuit example using 2SK1959
Figure 9 is a circuit example using NEC 2SK1959 MOS FET
transistor (N-channel).
For a MOS FET, an N-channel power MOS FET should be used.
Because the gate voltage and current of the external power MOS
FET are supplied from the stepped up output voltage VOUT, the MOS
FET is driven more effectively.
Depending on which MOS FET you use in your device, there is a
chance of a current overrun at power ON.
Thoroughly test all settings with your device before deciding on
which one to use. Also, try to use a MOS FET with the gate
capacitance of 300 pF or less.
Since the ON resistor of the MOS FET might affect the output
amperage as well as the efficiency, the threshold voltage should be
low. When the output voltage is as low as 2.0V the same as in the
S-8328E20, the circuit operates only when the MOS FET has the
threshold voltage lower than 2.0V.
VOUT
EXT
VOUT
-
+
(ON / OFF)
(VDD)
VSS
+
-
CC (F)=
2
π RA 20 kHz
1
DISCONTINUED
PRODUCT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S-8331B20FS-T2G | SWITCHING CONTROLLER, PDSO8 |
| S-8340A25AFT-T2 | 0.1 A SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO8 |
| S-8351A28MC-J2NT2G | SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO5 |
| S-93C56ADFJ | 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
| S-93C56BD0I-I8T1G | 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S832D | 功能描述:SW TOGGLE 3PDT 30A LEVER SCREW RoHS:是 類別:開關(guān) >> 撥動開關(guān) 系列:S 標準包裝:1 系列:A 電路:雙刀雙擲 開關(guān)功能:開-開-開 觸點額定電壓:6A @ 125VAC 觸動器類型:扁平型 觸動器長度:11.38mm 發(fā)光:不發(fā)光 安裝類型:面板安裝 端接類型:焊片 軸襯螺紋:1/4-40 包裝:散裝 |
| S-832D | 制造商:Nihon Kaiheiki Ind Co Ltd 功能描述:250V 50000 Silver 70 -10 42mm 24mm 73mm |
| S832D-RO | 功能描述:撥動開關(guān) 3PST ON-NONE-ON RoHS:否 制造商:C&K Components 觸點形式:DPDT 開關(guān)功能:ON - ON - ON 電流額定值: 電壓額定值 AC:20 V 電壓額定值 DC:20 V 功率額定值:0.4 VA 端接類型:V-Bracket 安裝風(fēng)格: 端子密封:Epoxy 觸點電鍍:Gold 照明:Not Illuminated |
| S832-RO | 功能描述:撥動開關(guān) 3PDT ON-ON HIGH CAP RoHS:否 制造商:C&K Components 觸點形式:DPDT 開關(guān)功能:ON - ON - ON 電流額定值: 電壓額定值 AC:20 V 電壓額定值 DC:20 V 功率額定值:0.4 VA 端接類型:V-Bracket 安裝風(fēng)格: 端子密封:Epoxy 觸點電鍍:Gold 照明:Not Illuminated |
| S8-32X1 | 制造商:MISCELLANEOUS 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。