參數(shù)資料
型號(hào)： S-8355Q34BD-OWT-TF
元件分類： 穩(wěn)壓器
英文描述： 0.08 A SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO6
封裝： SNB-6
文件頁數(shù)： 20/77頁
文件大?。?/td> 836K
代理商： S-8355Q34BD-OWT-TF
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.7.0_00
S-8355/56/57/58 Series
Seiko Instruments Inc.
27
4. Operation
The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 15.)
CL
M1
D
VOUT
CONT
VIN
L
+
EXT
VSS
Figure 15 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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-8355Q34BD-OWT-TFG 制造商:Seiko Instruments Inc (SII) 功能描述:DC DC CNTRLR SGL-OUT W/ PWM DC TO DC CNTRLR/STEP UP 10V 6PIN - Tape and Reel 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG CTRLR BST PWM 6-SNB
S-8355Q34MC-OWTT2G 功能描述:DC/DC 開關(guān)控制器 Step-Up SWR PWM 25.9uA 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-8355Q45MC-OXET2G 功能描述:DC/DC 開關(guān)控制器 STEP-UP SWR PWM 25.9UA 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-8355Q50BD-OXJ-TFG 制造商:Seiko Instruments Inc (SII) 功能描述:DC DC CNTRLR SGL-OUT W/ PWM DC TO DC CNTRLR/STEP UP 10V 6PIN - Tape and Reel 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG CTRLR BST PWM 6-SNB
S-8355Q50MC-OXJT2G 功能描述:DC/DC 開關(guān)控制器 Step-Up SWR PWM 25.9uA 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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