參數(shù)資料
型號(hào)： S-8327
廠商： Seiko Instruments Inc.
英文描述： CMOS PWM-Control Step-Up Switching Regulator(External Transistor)(CMOS PFM（頻率脈沖調(diào)制）控制步升開(kāi)關(guān)穩(wěn)壓器)
中文描述： 的CMOS脈寬調(diào)制控制升壓開(kāi)關(guān)穩(wěn)壓器（外部晶體管）（烤瓷的CMOS（頻率脈沖調(diào)制）控制步升開(kāi)關(guān)穩(wěn)壓器）
文件頁(yè)數(shù)： 37/65頁(yè)
文件大?。?/td> 569K
代理商： S-8327
SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
S-8323/8327 Series
36
Seiko Instruments Inc.
Reference Data
Use reference data to choose the external parts.
Reference data give yor the procedure to choose the recommended external parts for various applications and its
characteristics data.
1. Procedure to choose the most suitable condition from reference data.
START
Choose the desired output voltage
Choose the condition for desired output current
Operation efficiency is
more important rather than
stand-by efficiency
*1
*2
*3
No
Yes
Choose the best condition for operation efficiency.
Stand-by
efficiency is OK
*4
Choose next best
condition for operation
efficiency
Choose the best condition for stand-by efficiency.
Operation efficiency is OK
*4
*4
Choose next best condition
for stand-by efficiency
No
*4
*5
Ripple voltage is OK
Increase output
current
Yes
*5
No
END
Yes
*4
*4
*1)
Choose desired output voltage from conditions (1) to (17) shown in Table 1 and 2.
When desired output voltage does not exist in Tables, choose the next higher voltage.
For instance, when V
OUT
=3V for S-8323, choose from conditions (3) to (6).
*2)
Choose all conditions from conditions choosed above for output current needed for input voltage (min) of the
operational condition from
“
Reference data 1 (a) output voltage characteristics for output current
”
.
For instance, when 10mA output current is needed at V
IN
=0.9V, choose from conditions (4) to (6).
*3)
Stand-by efficiency means the efficiency when the output current is small (approx. 100
μ
A), operation efficiency
means the efficiency when the output current is large (several mA).
For instance, go to
“
YES
”
when operation efficiency is more important rather than stand-by efficiency.
*4)
Read the efficiency for input voltage and output current in operational condition from
“
Reference data 1 (b)
efficiency characteristics for output current
”
.
For instance, when V
IN
=0.9V at I
OUT
=10mA, the efficiency is max. (75%) in condition (6) in (4) to (6).
There is no difference between conditions (4) to (6) when the output current is 100
μ
A at stand-by condition.
Therefore, choose condition (6).
*5)
Read the ripple voltage under the operational condition selected above from
“
Reference data 2 ripple voltage
characteristics for output current
”
.
For instance, when condition (6) is selected above, the ripple voltage is mV at V
IN
=0.9V and I
OUT
=10mA.
No
Yes
相關(guān)PDF資料
PDF描述
S-8324 CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開(kāi)關(guān)穩(wěn)壓器)
S-8328 CMOS PWM/PFM-Control Step-Up Switching Regulator(CMOS PWM/PFM控制步升開(kāi)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(kāi)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(kāi)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(kāi)關(guān)穩(wěn)壓器-控制器)
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