參數(shù)資料
型號(hào)： S-8352D30MC-K8P-T2
元件分類： 穩(wěn)壓器
英文描述： 0.3 A SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDSO5
封裝： SOT-23, 5 PIN
文件頁數(shù)： 9/50頁
文件大小： 635K
代理商： S-8352D30MC-K8P-T2
STEP-UP, SUPER-SMALL PACKAGE, PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.1.2_00
S-8351/8352 Series
Seiko Instruments Inc.
17
3. Operation
The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 18.)
+
+
OSC
CL
CONT
M1
VIN
L
Di
OFF
/
ON
VOUT
Figure 18 Step-Up Switching Regulator Circuit for Basic Equation
Voltage at CONT pin at the moment M1 is turned ON (VA)
*1 :
VA = VS
*2
(1)
*1.
Current flowing through L (IL) is zero.
*2.
Non-saturated voltage of M1.
The change in IL over time :
L
V
L
V
dt
dI
S
IN
L
=
(2)
Integration of equation (2) (IL) :
t
L
V
I
S
IN
L
=
(3)
IL flows while M1 is ON (tON). The time of tON is determined by the oscillation frequency of OSC.
The peak current (IPK) after tON :
ON
S
IN
PK
t
L
V
I
=
(4)
The energy stored in L is represented by 1/2
L (IPK)
2.
When M1 is turned OFF (tOFF), the energy stored in L is emitted through a diode to the output capacitor.
Then, the reverse voltage (VL) is generated :
VL = (VOUT
+ VD
*1) VIN
(5)
*1.
Diode forward voltage
The voltage at CONT pin rises only by VOUT
+VD.
The change in the current (IL) flowing through the diode into VOUT during tOFF :
L
V
L
V
dt
dI
IN
D
OUT
L
+
=
(6)
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S-8352D30MC-K8PT2G 功能描述:DC/DC 開關(guān)控制器 Step-Up SWR PFM 100kHz 23.2uA 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
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S-8352D60MC-K9TT2U 功能描述:IC REG CTRLR BOOST SOT23-5 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 輸出類型:晶體管驅(qū)動(dòng)器 功能:升壓 輸出配置:正 拓?fù)?升壓 輸出數(shù):1 輸出階段:1 電壓 - 電源（Vcc/Vdd）:0.9 V ~ 10 V 頻率 - 開關(guān):100kHz 占空比（最大）:0.8 同步整流器:無 時(shí)鐘同步:無 串行接口:- 控制特性:- 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:SC-74A，SOT-753 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1
S-8353A20MC-IQFT2G 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Step-Up SWR PWM 18.7uA Iq RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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