涓茶仈鍨嬫垨骞惰仈鍨嬬數鍘嬪熀鍑嗙殑閫夋嫨
鏈枃浠嬬粛浜嗕笉鍚岀被鍨嬬數鍘嬪熀鍑嗚姱鐗囩殑閫夋嫨锛屾彁渚涗簡閫夋嫨涓茶仈鍨嬪拰骞惰仈鍨嬬數鍘嬪熀鍑嗘椂闇€瑕佽€冭檻鐨勫嚑椤规寚鏍囥€?
涓茶仈鍨嬬數鍘嬪熀鍑?/H2>
涓茶仈鍨?b>鐢靛帇鍩哄噯鍏锋湁涓変釜绔瓙锛歏IN銆乂OUT鍜孏ND锛岀被浼间簬绾挎€хǔ鍘嬪櫒锛屼絾鍏惰緭鍑虹數娴佽緝浣庛€佸叿鏈夐潪甯搁珮鐨勭簿搴︺€備覆鑱斿瀷鐢靛帇鍩哄噯浠庣粨鏋勪笂鐪嬩笌璐熻浇涓茶仈(鍥?)锛屽彲浠ュ綋浣滀竴涓綅浜嶸IN鍜孷OUT绔箣闂寸殑鍘嬫帶鐢甸樆銆傞€氳繃璋冩暣鍏跺唴閮ㄧ數闃伙紝浣縑IN鍊间笌鍐呴儴鐢甸樆鐨勫帇闄嶄箣宸?绛変簬VOUT绔殑鍩哄噯鐢靛帇)淇濇寔绋冲畾銆傚洜涓虹數娴佹槸浜х敓鍘嬮檷鎵€蹇呴渶鐨勶紝鍥犳鍣ㄤ欢闇€姹插彇灏戦噺鐨勯潤鎬佺數娴佷互纭繚绌鸿浇鏃剁殑绋冲帇銆備覆鑱斿瀷鐢靛帇鍩哄噯鍏锋湁浠ヤ笅鐗圭偣锛?
- 鐢垫簮鐢靛帇(VCC)蹇呴』瓒冲楂橈紝淇濊瘉鍦ㄥ唴閮ㄧ數闃讳笂浜х敓瓒冲鐨勫帇闄嶏紝浣嗙數鍘嬭繃楂樻椂浼氭崯鍧忓櫒浠躲€?
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- 绌鸿浇鏃讹紝鍞竴鐨勫姛鑰楁槸鐢靛帇鍩哄噯鐨勯潤鎬佺數娴併€?
- 鐩稿浜庡苟鑱斿瀷鐢靛帇鍩哄噯锛屼覆鑱斿瀷鐢靛帇鍩哄噯閫氬父鍏锋湁鏇村ソ鐨勫垵濮嬭宸拰娓╁害绯绘暟銆?
鍥?. 涓夌涓茶仈鍨嬬數鍘嬪熀鍑嗘鍥?/I>
涓茶仈鍨嬪熀鍑嗚璁?/H2>
涓茶仈鍨嬬數鍘嬪熀鍑嗙殑璁捐鐩稿綋绠€渚匡紝鍙渶纭繚杈撳叆鐢靛帇鍜屽姛鑰楀湪IC瑙勫畾鐨勬渶澶у€间互鍐咃細
P_SER = (VSUP - VREF)IL + (VSUP 脳 IQ)
瀵逛簬涓茶仈鍨嬬數鍘嬪熀鍑嗭紝鏈€澶у姛鑰楀嚭鐜板湪鏈€楂樿緭鍏ョ數鍘嬨€佽礋杞芥渶閲嶇殑鎯呭喌涓嬶細
WC_P_SER = (VMAX - VREF)ILMAX + (VMAX x IQ)
鍏朵腑锛?br>
P_SER = 涓茶仈鍨嬪熀鍑嗙殑鍔熻€?br>VSUP = 鐢垫簮鐢靛帇
VREF = 鍩哄噯鐢靛帇杈撳嚭
IL = 璐熻浇鐢垫祦
IQ = 鐢靛帇鍩哄噯鐨勯潤鎬佺數娴?br>WC_P_SER = 鏈€澶у姛鑰?br>VMAX = 鏈€澶х數婧愮數鍘?br>ILMAX = 鏈€澶ц礋杞界數娴?br>
骞惰仈鍨嬬數鍘嬪熀鍑?/H2>
骞惰仈鍨嬬數鍘嬪熀鍑嗘湁涓や釜绔瓙锛歄UT鍜孏ND銆傚畠鍦ㄥ師鐞嗕笂鍜岀ǔ鍘嬩簩鏋佺寰堢浉浼硷紝浣嗗叿鏈夋洿濂界殑绋冲帇鐗规€э紝绫讳技浜庣ǔ鍘嬩簩鏋佺锛屽畠闇€瑕佸閮ㄧ數闃诲苟涓斿拰涓庤礋杞藉苟鑱斿伐浣?鍥?)銆傚苟鑱斿瀷鐢靛帇鍩哄噯鍙互褰撲綔涓€涓繛鎺ュ湪OUT鍜孏ND涔嬮棿鐨勫帇鎺х數娴佹簮锛岄€氳繃璋冩暣鍐呴儴鐢垫祦锛屼娇鐢垫簮鐢靛帇涓庣數闃籖1鐨勫帇闄嶄箣宸?绛変簬OUT绔殑鍩哄噯鐢靛帇)淇濇寔绋冲畾銆傛崲涓€绉嶈娉曪紝骞惰仈鍨嬬數鍘嬪熀鍑嗛€氳繃浣胯礋杞界數娴佷笌娴佽繃鐢靛帇鍩哄噯鐨勭數娴佷箣鍜屼繚鎸佷笉鍙橈紝鏉ョ淮鎸丱UT绔數鍘嬬殑鎭掑畾銆傚苟鑱斿瀷鍩哄噯鍏锋湁浠ヤ笅鐗圭偣锛?
- 閫夋嫨閫傚綋鐨凴1淇濊瘉绗﹀悎鍔熺巼瑕佹眰锛屽苟鑱斿瀷鐢靛帇鍩哄噯瀵规渶楂樼數婧愮數鍘嬫病鏈夐檺鍒躲€?
- 鐢垫簮鎻愪緵鐨勬渶澶х數娴佷笌璐熻浇鏃犲叧锛屾祦缁忚礋杞藉拰鍩哄噯鐨勭數婧愮數娴侀渶鍦ㄧ數闃籖1涓婁骇鐢熼€傚綋鐨勫帇闄嶏紝浠ヤ繚鎸丱UT鐢靛帇鎭掑畾銆?
- 浣滀负绠€鍗曠殑2绔櫒浠讹紝骞惰仈鍨嬬數鍘嬪熀鍑嗗彲閰嶇疆鎴愪竴浜涙柊棰栫殑鐢佃矾锛屼緥濡傝礋鐢靛帇绋冲帇鍣ㄣ€佹诞鍦扮ǔ鍘嬪櫒銆佸墛娉㈢數璺互鍙婇檺骞呯數璺€?
- 鐩稿浜庝覆鑱斿瀷鐢靛帇鍩哄噯锛屽苟鑱斿瀷鐢靛帇鍩哄噯閫氬父鍏锋湁鏇翠綆鐨勫伐浣滅數娴併€?
鍥?. 2绔苟鑱斿瀷鐢靛帇鍩哄噯妗嗗浘
骞惰仈鍨嬪熀鍑嗚璁?/H2>
骞惰仈鍨嬬數鍘嬪熀鍑嗙殑璁捐绋嶅井鏈変簺闅惧害锛屽繀椤昏绠楀閮ㄧ數闃诲€笺€傝鏁板€?R1)闇€瑕佷繚璇佺敱鐢靛帇鍩哄噯鍜岃礋杞界數娴佷骇鐢熺殑鍘嬮檷绛変簬鐢垫簮鐢靛帇涓庡熀鍑嗙數鍘嬬殑宸€笺€傞噰鐢ㄦ渶浣庤緭鍏ョ數婧愮數鍘嬪拰鏈€澶ц礋杞界數娴佽绠桼1锛屼互纭繚鐢佃矾鑳藉湪鏈€鍧忔儏鍐典笅姝ｅ父宸ヤ綔銆備笅鍒楃瓑寮忕敤浜庤绠桼1鐨勬暟鍊煎拰鍔熻€楋紝浠ュ強骞惰仈鍨嬬數鍘嬪熀鍑嗙殑鍔熻€?鍥?)銆?br>
R1 = (VMIN - VREF)/(IMO + ILMAX)
R1涓婄殑鐢垫祦鍜屽姛鑰椾粎涓庣數婧愮數鍘嬫湁鍏筹紝璐熻浇鐢垫祦瀵规娌℃湁褰卞搷锛屽洜涓鸿礋杞界數娴佷笌鐢靛帇鍩哄噯鐨勭數娴佷箣鍜屼负鍥哄畾鍊硷細
I_R1 = (VSUP - VREF)/R1
P_R1 = (VSUP - VREF)²/R1
P_SHNT = VREF(IMO + I_R1 - IL)
鏈€宸伐浣滄潯浠跺彂鐢熷湪杈撳叆鐢靛帇鏈€澶с€佽緭鍑虹┖杞芥椂锛?br>
WC_I_R1 = (VMAX - VREF)/R1
WC_P_R1 = (VMAX - VREF)²/R1
WC_P_SHNT = VREF(IMO + WC_I_R1)
鎴?br>WC_P_SHNT = VREF(IMO + (VMAX - VREF)/R1)
鍏朵腑锛?br>
R1 = 澶栭儴鐢甸樆
I_R1 = R1鐨勭數娴?br>P_R1 = R1鐨勫姛鑰?br>P_SHNT = 鐢靛帇鍩哄噯鐨勫姛鑰?br>VMIN = 鏈€浣庣數婧愮數鍘?br>VMAX = 鏈€楂樼數婧愮數鍘?br>VREF = 鍩哄噯杈撳嚭
IMO = 鐢靛帇鍩哄噯鏈€灏忓伐浣滅數娴?br>ILMAX = 鏈€澶ц礋杞界數娴?br>WC_I_ R1 = 鏈€宸儏鍐典笅R1鐨勭數娴?br>WC_P_R1 = 鏈€宸儏鍐典笅R1鐨勫姛鑰?br>WC_P_SHNT = 鏈€宸儏鍐典笅骞惰仈鐢靛帇鍩哄噯鐨勫姛鑰?br>
鍥?. 骞惰仈鍨嬬數鍘嬪熀鍑嗚皟鏁寸數娴?IMO)浠ヤ骇鐢熺ǔ瀹氱殑VREF
閫夋嫨鐢靛帇鍩哄噯
鐞嗚В浜嗕覆鑱斿瀷鍜屽苟鑱斿瀷鐢靛帇鍩哄噯鐨勫樊寮傦紝鍗冲彲鏍规嵁鍏蜂綋搴旂敤閫夋嫨鏈€鍚堥€傜殑鍣ㄤ欢銆備负浜嗗緱鍒版渶鍚堥€傜殑鍣ㄤ欢锛屾渶濂藉悓鏃惰€冭檻涓茶仈鍨嬪拰骞惰仈鍨嬪熀鍑嗐€傚湪鍏蜂綋璁＄畻涓ょ绫诲瀷鐨勫弬鏁板悗锛屽嵆鍙‘瀹氬櫒浠剁被鍨嬶紝杩欓噷鎻愪緵涓€浜涚粡楠屾柟娉曪細
- 濡傛灉闇€瑕侀珮浜?.1%鐨勫垵濮嬬簿搴﹀拰25ppm鐨勬俯搴︾郴鏁帮紝涓€鑸簲璇ラ€夋嫨涓茶仈鍨嬬數鍘嬪熀鍑嗐€?
- 濡傛灉瑕佹眰鑾峰緱鏈€浣庣殑宸ヤ綔鐢垫祦锛屽垯閫夋嫨骞惰仈鍨嬬數鍘嬪熀鍑嗐€?
- 骞惰仈鍨嬬數鍘嬪熀鍑嗗湪杈冨鐢垫簮鐢靛帇鎴栧ぇ鍔ㄦ€佽礋杞芥潯浠朵笅浣跨敤鏃跺繀椤诲€嶅姞灏忓績銆傝鍔″繀璁＄畻鑰楁暎鍔熺巼鐨勬湡鏈涘€硷紝瀹冨彲鑳藉ぇ澶ч珮浜庡叿鏈夌浉鍚屾€ц兘鐨勪覆鑱斿瀷鐢靛帇鍩哄噯(璇峰弬鑰冧互涓嬭寖渚?銆?
- 瀵逛簬鐢垫簮鐢靛帇楂樹簬40V鐨勫簲鐢紝骞惰仈鍨嬬數鍘嬪熀鍑嗗彲鑳芥槸鍞竴鐨勯€夋嫨銆?
- 鏋勫缓璐熺數鍘嬬ǔ鍘嬪櫒銆佹诞鍦扮ǔ鍘嬪櫒銆佸墛娉㈢數璺垨闄愬箙鐢佃矾鏃讹紝涓€鑸€冭檻骞惰仈鍨嬬數鍘嬪熀鍑嗐€?
渚?锛氫綆鐢靛帇銆佸浐瀹氳礋杞?/H2>
鍦ㄨ繖涓究鎼哄紡搴旂敤涓紝鏈€鍏抽敭鐨勫弬鏁版槸鍔熻€椼€備互涓嬩负鐩稿簲鐨勬妧鏈寚鏍囷細
VMAX = 3.6V
VMIN = 3.0V
VREF = 2.5V
ILMAX = 1µA
鎴戜滑鎶婅寖鍥寸缉灏忓埌涓や釜鍣ㄤ欢锛?br>
涓茶仈鍨嬬數鍘嬪熀鍑哅AX6029
IQ = 5.75µA
WC_P_SER = (VMAX - VREF)ILMAX + (VMAX 脳 IQ)
WC_P_SER = (3.6V - 2.5V)1µA + (3.6V 脳 5.75µA) = 21.8µW
璇ヤ覆鑱斿瀷鍩哄噯鏄數璺腑鍞竴娑堣€楀姛鐜囩殑鍣ㄤ欢锛屽洜姝わ紝鍦ㄦ渶宸伐浣滄潯浠朵笅鐨勬€诲姛鑰椾负21.8µW銆?br>
骞惰仈鍨嬬數鍘嬪熀鍑哅AX6008
IMO = 1µA
R1 = (VMIN - VREF)/(IMO + ILMAX)
R1 = (3.0V - 2.5V)/(1µA + 1µA) = 250k惟
WC_I_R1 = (VMAX - VREF)/R1
WC_I_R1 = (3.6V - 2.5V)/250k惟 = 4.4µA
WC_P_R1 = (VMAX - VREF)²/R1
WC_P_R1 = (3.6V - 2.5V)²/250k惟 = 4.84µW
WC_P_SHNT = VREF(IMO + (VMAX - VREF)/R1)
WC_P_SHNT = 2.5V(1µA + (3.6V - 2.5V)/250k惟) = 13.5µW
鏈€宸伐浣滄潯浠朵笅鐨勬€诲姛鑰楁槸R1鐨勫姛鑰?WC_P_R1)涓庡苟鑱斿熀鍑嗗姛鑰?WC_P_SHNT)鐨勫拰锛屽洜姝わ紝鎬诲姛鑰椾负18.3µW銆?br>
璇ュ簲鐢ㄤ腑鏈€鍚堥€傜殑鍣ㄤ欢搴旇鏄苟鑱斿瀷鐢靛帇鍩哄噯MAX6008锛屽叾鍔熺巼鎹熻€椾负18.3µW (鑰孧AX6029鐨勫姛鑰椾负21.8µW)銆傝瀹炰緥璇存槑鐢垫簮鐢靛帇鍙樺寲瀵硅璁＄殑褰卞搷杈冨ぇ銆傛渶鍒濓紝骞惰仈鍨嬬數鍘嬪熀鍑嗙殑1µA鏈€灏忓伐浣滅數娴佸叿鏈夋瀬澶т紭鍔匡紝浣嗘槸涓轰簡纭繚鑳藉湪鏈€宸伐浣滄潯浠朵笅宸ヤ綔锛屽叾宸ヤ綔鐢垫祦琚揩澧炲姞鑷?.4µA銆傝嫢鐢垫簮鐢靛帇鐨勫彉鍖栬寖鍥存瘮鏈緥涓殑瑕佹眰(3.0V鑷?.6V)鏇村涓€浜涳紝閮戒細浼樺厛鑰冭檻浣跨敤涓茶仈鍨嬬數鍘嬪熀鍑嗐€?br>
渚?锛氫綆鐢靛帇銆佸彉鍖栫殑璐熻浇
鏈緥绫讳技浜庝緥1锛屼絾鎶€鏈寚鏍囨湁涓€浜涘皬鐨勬敼鍙樸€備笌1µA鍥哄畾璐熻浇涓嶅悓锛屾湰渚嬩腑鐨勮礋杞藉懆鏈熸€у湴鍚告敹鐢垫祦锛屽湪99ms鐨勬椂闂村唴鍚告敹鐢垫祦涓?µA锛?ms鐨勬椂闂村唴鍚告敹鐢垫祦涓?mA锛?br>
VMAX = 3.6V
VMIN = 3.0V
VREF = 2.5V
ILMAX = 1mA (1%鐨勬椂闂?
ILMIN = 1µA (99%鐨勬椂闂?
鎴戜滑鑰冭檻鍚屾牱鐨勪袱绉嶅櫒浠讹細
涓茶仈鍨嬬數鍘嬪熀鍑哅AX6029
IQ = 5.75µA
WC_P_SER = (VMAX - VREF)ILMAX + (VMAX 脳 IQ)
WC_P_SER (1mA IL) = (3.6V - 2.5V)1mA + (3.6V 脳 5.75µA)
= 1.12mW (1%鐨勬椂闂?
WC_P_SER (1µA IL) = (3.6V - 2.5V)1µA + (3.6V x 5.75µA)
= 21.8µW (99%鐨勬椂闂?
骞冲潎鍔熻€?= 1.12mW 脳 1% + 21.8µW 脳 99% = 32.78µW
骞惰仈鍨嬬數鍘嬪熀鍑哅AX6008
IMO = 1µA
R1 = (VMIN - VREF)/(IMO + ILMAX)
R1 = (3.0V - 2.5V)/(1µA + 1mA) = 499惟
瀵逛簬ILOAD = 1mA锛?br>WC_P_R1 = (VMAX - VREF)²/R1
WC_P_R1 = (3.6V - 2.5V)²/499惟 = 2.42mW (1%鐨勬椂闂?
P_SHNT = VREF(IMO + I_R1 - IL)
P_SHNT = 2.5V(1µA + 1mA - 1mA) = 2.5µW (1%鐨勬椂闂村唴)
瀵逛簬ILOAD = 1µA锛?br>WC_P_R1 = (VMAX - VREF)²/R1
WC_P_R1 = (3.6V - 2.5V)²/499惟 = 2.42mW (99%鐨勬椂闂村唴)
P_SHNT = VREF(IMO + I_R1 - IL)
P_SHNT = 2.5V(1µA + 1mA - 1µA) = 2.5mW (99%鐨勬椂闂村唴)
骞冲潎鍔熻€?= 2.42mW 脳 1% + 2.5µW 脳1% + 2.42mW 脳 99% + 2.5mW 脳 99% = 4.895mW銆?br>
浠庝笂杩板疄渚嬪彲浠ョ湅鍑猴細骞惰仈鍨嬬數鍘嬪熀鍑嗙殑鍔熻€楄秴杩囦簡涓茶仈鍨嬬數鍘嬪熀鍑嗙殑100鍊嶃€傚浜庤礋杞界數娴佸彉鍖栬寖鍥磋緝瀹界殑搴旂敤锛屼覆鑱斿瀷鐢靛帇鍩哄噯鏄洿濂界殑閫夋嫨銆?br>