Ϻ PCBѵ ϵ2020ŷޱ̭
γϵ绰0512-57933566
ŻԴܵPCBƲּ

ϵ2020ŷޱ̭

ɽγPCBϵʽ
ɽγǵӿƼ޹˾

˾ַ:ɽǧ·26
˾绰Tel:0512-50139595
ʼEmail: [email protected]

2020ŷޱ̭  ֧  ŻԴܵPCBƲּ

ŻԴܵPCBƲּ

ʱ䣺2016-08-10 08:40:54 ࣺ

 ȫֵԴȱʹʼн2020ŷޱ̭ܺı׼ԽԽϸ񣬶ڵԴʦЧʡܵĵԴһսĴӵԴPCBIJֳŻSIMPLE SWITCHERԴܵļPCBַʵ

ڹ滮ԴʱҪǵص··ȻڵԴЩ·˽·Եĵ·ԺҪΪǻ⡣ͼ1ʾĻ·1УԵͨ·(Cin1)ڸ߶MOSFETijͨʱھMOSFETڲ·(CO1)󷵻·

 

ͼ1 Դл·ʾͼ

 

·2ڲ߶MOSFETĹضʱԼͶMOSFETĵͨʱγɵġڲд洢·͵ͶMOSFET󷵻GNDͼ1ʾ·ص򣨰·ı߽磩Ϊdi/dtתṩƵԼʹƵԴ·ĹУ·(Cin1)Źؼá

·(Co1)Ȼϴȴ䵱ĸƵ˲ԭӦþԵVINVOUTŷáͼ2ʾʹ·ԵVINVOUT֮߾̲ɽЩӲĵн͡

 

ͼ2 SIMPLE SWITCHER·

 

PCBеĵнͣôһ,ͨٽCin1CO1֮ĴԪܡ⽫ȷõĸƵ·di/dtĵʽѹֵͬ͡ʱܽ͵ѹӦͣȷ󻯽EMI

ӸټеĵͻֳԸƵʵĵ迹ԣӶٴ䡣ʹմɵX7RX5RESR͵ֻнĵݷڿGNDVINʱӵĸݲܷáSIMPLE SWITCHERԴ龭еͷʹEMIѭĽܵPCBָ룬øܡ

··滮ӣŻԴȴŹؼá⣬ӦþCin1CO1֮Ľӵߣֱ㺸̣ھнϴ(Cin1)ӵΪҪ

нӵصţ㺸̣Լ裬ӦPCBϵĻ·㡣˻·Ϊе͵ķ·ԼĽ̸ɢװʹá

 

ͼ3 鼰Ϊ迹PCBʾͼ

 

ҲӦھܿFBŵλϡҪ˸迹ڵϵDZȡֵͣFB뷴мͷ֮߾ܶҪġõIJǰӦ÷ھܿϲ㷴λϡ

ɢ

Ľղڵôͬʱɢ˸Ӱ죬ֵĹҪӸСĿռɢǵһ⣬SIMPLE SWITCHERԴװıһĴ㺸̣ԵʽӵءúڴڲMOSFETͨ󲿷PCBṩ͵迹

Ӱ뵼ᵽЩװ迹(θJC)Ϊ1.9/WȻﵽҵȵθJCֵͺ룬װ迹(θCA)̫ʱθJCֵҲûṩΧͨĵ迹ɢ·ͻۼ㺸޷ɢôʲôθCAֵ㺸̵ȫPCBԼصɢƬĿơ

˽һνвɢƬļPCBɢͼ3ʾ鼰Ϊ迹PCBӽᵽƬ̵迹ȣڽװ迹ԽϸߣһιƴӽᵽΧ(θJT)ʱ2020ŷޱ̭ԺθJAɢ·

ɢһȷҪɢĹʡݱйЧͼ(η)ɼĵĹ(PD)

Ȼ2020ŷޱ̭ʹеĸ¶TAmbientͶTJunction(125)¶ԼȷPCBϷװ衣

2020ŷޱ̭ʹPCB棨͵ײϾδ𻵵һ˾ͭɢƬɢȿףĶȴݵĴ򻯵Ľֵȷɢİ

 

PCBֵδǵɢȿӵãЩɢȿ׽Ӷ㣨װPCBײ㴫ݡײ㣬ԴォϵͳȥΪʹֵЧʹ810ɢȿסɢȿ׵зʽֵ

˽ֱֵΪ12ܶͭΪ0.5˾ĵֱͨס㺸·ҪܶһЩɢȿףʹЩɢȿ11.5mmļγС

SIMPLE SWITCHERԴΪӦԸӵĵԴԼֱ/ֱתصĵ͵PCBṩȻѱһЩԱõ·ɢŻܡ

ԴŻԴܵPCBƲּ

"ŻԴܵPCBƲּ"˻ע

ȨУɽγǵӿƼ޹˾      ֧֣