參數(shù)資料
型號(hào)： S-8328
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)： 58/68頁
文件大?。?/td> 647K
代理商： S-8328
57
Collection of Product FAQs
Author: Tachibana Midori
Date: 98/11/12 (Thursday) 10:17 (Modified:)
<Information level>
X:
Working
Index:
B: Technical
<Product>
Division name: 01 IC
Category 1:
11 Power Supply
Category 2:
4. Switching Regulators
Cal No.:
S-8323/24/27/28
Related Documents:
Question:
What about using MOS FET siliconix/TN200T externally connected to the S-8328B
Answer:
Power dissipation when Siliconix/TN200T is used.
Results:
-
Version 3.3 V did not have the required capacity of Iout = 400 mA (at VIN=1.8 V) when
Siliconix/TN0200T was employed.
-
Version 5 V did not exceed the power dissipation of Siliconix/TN0200T at Iout = 200 mA (at VIN=1.8
V).
Description of study:
Loss P under the worst possible conditions (VIN=1.8 V, Iout=200 mA) was calculated.
P
=
(I contave
×
duty)
2
×
Ron
=
(0.84A
×
76%)
2
×
0.4
=
0.163w
≤
PD (0.23w)
Where,
I contave:Average current that flows through the external MOS FET, TRS at the time of ton. This is a
measured value (see the waveforms below).
duty:
Ratio of ton to the switching period. This is a measured value (see the waveforms below).
Ron:
Drain-source resistance value when Siliconix/TN0200T comes on. This is the maximum
value of the specification.
PD:
Package power dissipation of Siliconix/TN0200T. This is the maximum value of the
specification.
相關(guān)PDF資料
PDF描述
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)
S-8340B 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)
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