ä ̧»è¦ç¹ç¹
è¶ å®1/2è3/4å ¥çμåèå'ï1/43Vè³40V
å ̄éæ©çæ ̈¡å1/4æä1/2
å1/4ºå¶PWMæ ̈¡å1/4
PFMæ ̈¡å1/4
å ̄ç1/4ç ̈çμæμPFMåPWMæ ̈¡å1/4ä¹é'çè3/4¹ç
300μAICéæçμæμï1/4ç¤ç·ï1/4空è1/21/2ï1/4; 180μAè3/4å ¥éæçμæμï1/4æ è'è1/21/2ï1/4ç¤ç· V OUTè¿æ¥å°AUXVCCï1/4
å°äº3μAå3/4 æºè3/4å ¥çμæμï1/4ICçæ®ç3/4人士ï1/4
ä ̧塿æ
忥éå
é忥éå
ä ̧¤ä ̧ªé¶æ®μååéå
å ̄ç1/4ç ̈é¢çä»200kHz - 2.2MHzçé¢ç忥è1/2å
±1ï1/4 ä ̧¥æ 1/4ççμåè°èç²3/4度
å ̄é çéå ̈æè¿æμä¿æ¤
æ ̧©åº¦è¡¥å¿çμæμæ£æμ
é¢çæè¿
å ̄ç1/4ç ̈è¶ é¢æé
å ̈æåæ åμä ̧çè· ̄æ¡ä»¶çæåæ ̈¡å1/4ä¿æ¤
20 LD HTSSOPå°è£
æ é ï1/4符åRoHSï1/4
æè¿°
ISL78200æ ̄ä ̧ä ̧ªå
·æ90mΩé«è3/4¹MOSFETåä1/2ä3/4§é©±å ̈å ̈éæç忥éåæ§å¶å ̈ãISL78200æ ̄æ3Vè³40Vçå®1/2è3/4å ¥çμåèè'ãå ³äºISL78200çè3/4åºçμæμè1/2åï1/4å ̈éå ̧ ̧ æ ̄æ5Vè³äºæ¡ä»¶ä ̧çä ̧ä ̧ª2.5Açè¿ç»è'è1/21/2è3/4åºï1/4äºå ̈ 8Vå°36Vèå'å ï1/4ä ̧º500kHzï1/4+85°Cé'éæ¢ç©ºæ°ç ̄墿 ̧©åº¦ãå ̄¹äºä»»ä1/2ç¹å®çåºç ̈ç ̈åºï1/4å é çæå¤§è3/4åºçμæμåå®³äºæ ̈¡å
·æ ̧©åº¦ä ̧è¶ è¿+125°Cçæ¶æ£å ̈ICççμæºï1/4è¿æ ̄å ³ç³»å°è3/4å ¥çμåï1/4è3/4åºçμåï1/4å 空æ ̄ï1/4å1/4å ³é¢çï1/4ç ̄墿 ̧©åº¦åçμè · ̄æ¿å ̧å±ççãåé 第14é¡μçè3/4åºçμæμé ̈åçæ'å¤ç»èãISL78200å
·æå1/4ºå¶PWMæ ̈¡å1/4åPFMæ ̈¡å1/4ä ̧çæä1/2æ ̈¡å1/4çμæ'»éæ©ãå ̈PFMæ ̈¡å1/4ä ̧ï1/4è3/4å ¥éæçμæμä ̧º300μAä1/2ï1/4å ̄以è¿ä ̧æ¥åå°ä ̧AUXVCCè¿æ¥å°V180μA ä ̧12Vè ³äºIN 5Vè³äºè3/4åºçåºç ̈ãPFMåPWMä¹é'çè'è1/21/2è3/4¹çå ̄以ç1/4ç ̈ï1/4æ¶μçäºå¹¿æ³çåºç ̈ãä1/2ä3/4§é©±å ̈å ̈ï1/4å ̈滥ç ̈æ¥é©±å ̈å¤é ̈ä1/2è3/4¹MOSFETç ̈äºå æ¥éåï1/4æçä ̧ä ̧ä ̧ªæ åçé忥éåé²ç1/2®ãä1/2ä3/4§é©±å ̈å ̈¹å ̄以被ç ̈æ¥é©±å ̈ååè1/2¬æ¢å ̈ä1/2ä ̧ºé¢ç ̈³åå ̈ï1/4大夤§æ©å±äºä1/2ä ̧çè3/4å ¥çμåèå'3Vææ'ä1/2ï1/4åè å ̧ååºç ̈çμè· ̄å3/4III -ååéåè1/2¬æ¢å ̈ç第5é¡μï1/4ãISL78200æä3/4æå1/4ºå¤§çμæμä¿æ¤ãå®éç ̈éå ̈æçμæμéå¶å³°å1/4çμæμæ ̈¡å1/4æ§å¶ãå®ä ̧ é¢çæè¿çμæμéå¶æ¡ä»¶ä ̧宿1/2; æ¤å¤ï1/4æåè¿æμä¿æ¤æ ̈¡å1/4ï1/4è¿å®æ1/2äºèå»çææ¡ä»¶ä ̧ä¿è ̄å ̄é è¿è¡ãISL78200å ·æå ̄¹åç§æ éçå ̈é¢ä¿æ¤ï1/4å æ¬è¿åè¿æ ̧©ä¿æ¤ çã