SM8002C Datasheet PDF - ETC
Part Number | SM8002C | |
Description | Switch off the power switch chip (18 Pages) | |
Manufacturers | ETC | |
Logo | ||
There is a preview and SM8002C download ( pdf file ) link at the bottom of this page. Total 18 Pages |
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www.DataSheet4U.co6.m
7.
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PWM
HDIP4
15W
100KHz
1.
2. DVD VCD
3.
PWM
EMI
±2KHz
20W
SM8002C
100KHz
深圳市宝利捷电子有限公司
TEL:0755--82866737 83952850
1
FAX:0755--83012794
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离线式开关电源开关芯片
上电过程中各点波形如图四:
SM8002C
图四
当
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Vin(高直流电压)上电之后,首先通过
Vstart
脚使
Vsw
和
VDD
的电压逐渐上升,当
VDD
上升到 5V,内部定时器开始工作,同时电压上升,由于内部稳压管作用,电压最终到 5.6V;0.65
秒之后(就是图中的 t),定时器结束,同时内部开关关断,由于电流消耗,VDD 下降,下降到 4.8V,
Vsw 出现 PWM 波形,这个时候会在变压器的输出端输出一定的电压,经整流和滤波后在输出端
有输出电压 Vout; Vout 电压逐渐上升,当上升到设计值,系统通过光耦对 VDD 做一次很小的电
压调整,然后出现平稳,Vsw 的波形也趋向平稳。
十、应用电路
下面的电路图为常用的 5V 输出开关电源电路。在具体 PCB Layout 要注意的是,就是 C5 104
瓷片电容要尽量靠近芯片。
深圳市宝利捷电子有限公司
5
TEL:0755--82866737 83952850
FAX:0755--83012794
共 18 页
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SM8002C electronic component. |
Information | Total 18 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Product Image and Detail view | 1. PWM Controller ( PDF ) [ Learn More ] | |
Download | [ SM8002C.PDF Datasheet ] |
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