5.6
鍙嶉鐢佃矾鍘熺悊鐨勮璁?/p>
鍙嶉鐢佃矾鍘熺悊鍥惧鍥撅紙
5-7
锛?/p>
銆?/p>
涓轰簡纭繚杈撳嚭鐨勭ǔ瀹?/p>
,
鍦?/p>
+15V
涓婂紩鍏ュ弽棣?/p>
,
閲囩敤
2.5~36V
鍙皟寮忕簿瀵嗗苟鑱旂ǔ
鍘嬪櫒
TL431
浣滀负绋冲帇鍣ㄤ欢銆傚畠鐨勮緭鍑虹數鍘嬪彲鐢ㄤ袱涓數闃讳换鎰忚缃埌
Uref(2.5V)
鍒?/p>
36V
鑼冨洿鍐呫�傝鍣ㄤ欢鐨勫吀鍨嬪姩鎬侀樆鎶椾负
0.2
惟
銆傜敤瀹冩潵鏋勬垚澶栭儴璇樊鏀惧ぇ鍣?/p>
,
鍐嶄笌绾挎�у厜鑰?/p>
PC817
缁勬垚闅旂寮忓弽棣堢數璺�傚綋杈撳叆绔姞鐢典俊鍙锋椂
,
鍙戝厜鍣ㄥ彂鍑哄厜
绾?/p>
,
鐓у皠鍦ㄥ彈鍏夊櫒涓?/p>
,
鍙楀厜鍣ㄦ帴鍙楀厜绾垮悗瀵奸�?/p>
,
浜х敓鍏夌數娴佷粠杈撳嚭绔緭鍑?/p>
,
浠庤�屽疄
鐜颁簡鈥滅數
-
鍏?/p>
-
鐢碘�濈殑杞崲銆?/p>
PC817
涓嶅彲浠ヨ捣鍒板弽棣堜綔鐢?/p>
,
杩樺彲浠ヨ捣鍒伴殧绂讳綔鐢?/p>
,
褰?/p>
PC817
浜屾瀬绠℃鍚戠數娴佸湪
3mA
宸﹀彸鍙樺寲鏃?/p>
,
涓夋瀬绠＄殑闆嗗皠鐢垫祦鍦?/p>
4mA
宸﹀彸鍙樺寲
,
鑰?/p>
闆嗗皠鏋佺數鍘嬪湪寰堝鐨勮寖鍥村唴绾挎�у彉鍖?/p>
,
鍥犺�屾瘮杈冪鍚?/p>
SG3525
鐨勬帶鍒惰姹傘�?/p>
褰?/p>
+15V
杈撳嚭鐢靛帇鍗囬珮鏃?/p>
,
缁?/p>
R11
銆?/p>
R12
鍒嗗帇鍚庡緱鍒扮殑鍙栨牱鐢靛帇
,
灏变笌
TL431
涓殑
2.5V
甯﹂殭
鍩哄噯鐢靛帇杩涜姣旇緝
,
骞跺湪闃存瀬涓婂舰鎴愯宸數鍘?/p>
,
浣?/p>
LED
鐨勫伐浣滅數娴佸彂鐢熷彉鍖?/p>
,
鍐嶉�?/p>
杩囧厜鑰?/p>
PC817
鍘绘敼鍙樺弽棣?/p>
FD
鐨勭數鍘?/p>
,
SG3525
1
鑴氱殑鐢靛帇澶у皬鍙戠敓鍙樺寲
,9
鑴氱數娴?/p>
澶у皬鍙戠敓鍙樺寲
,
浠庤�屼娇
11
銆?/p>
14
鐨勮緭鍑哄崰绌虹浉搴斿彉鍖栫淮鎸佺ǔ瀹氱殑
+15V
杈撳嚭銆?/p>
5.6.1
鍙嶉鐢佃矾鍙傛暟璁＄畻
鏍规嵁鍘熺悊鍥撅紙
5-7
锛夊彲鐭?/p>
Vr
12
R
R11
1
V0
锛?/p>
锛?/p>
飥?/p>
飥?/p>
鍏紡锛?/p>
5-2
锛?/p>
宸茬粡鐭ラ亾
TL421
鐨勫熀鍑嗙數鍘?/p>
Vr=2.5V,
鍙?/p>
R11=10k
锛屽垯鐢卞叕寮忥紙
5-1
锛夊彉褰㈠緱
鍏紡锛?/p>
5-3
锛夛細
11
R
1
Vr
V0
R12
锛?/p>
锛?/p>
飥?/p>
飥?/p>
=
1)
-
2.5
15
(
=50K
鍏紡锛?/p>
5-3
锛?/p>
鐢卞浘锛?/p>
5-8
锛?/p>
PC817
鐨?/p>
V
ce
涓?/p>
I
f
鐨勫叧绯绘洸绾垮彲浠ユ纭‘瀹?/p>
PC817
浜屾瀬绠℃鍚戠數
娴?/p>
I
f
锛?/p>
鍙?/p>
I
f
锛?/p>
3mA
锛?/p>
浜屾瀬绠＄殑姝ｅ悜鍘嬮檷
V
f
鍏稿瀷鍊间负
1.2V
銆?/p>
浠?/p>
TL431
鐨勬妧鏈弬鏁扮煡锛?/p>
TL431
鐨勯槾鏋佺數鍘嬪�?/p>
V
ka
鍦?/p>
2.5V
锛?/p>
37V
鍙樺寲鏃讹紝
TL431
鐨勯槾鏋佺數鍘嬪�?/p>
Ika
鍙互鍦ㄤ粠
1mA
鍒?/p>
100mA
浠ュ唴寰堝ぇ鑼冨洿閲屽彉鍖栵紝涓�鑸�?/p>
20mA
鍗冲彲锛屾棦鍙互绋冲畾宸ヤ綔锛屽張鑳?/p>
鎻愪緵涓�閮ㄥ垎姝昏礋杞姐�傚彇
R15=470
飦?/p>
鍒欙紝
R15
鐨勭數鍘?/p>
V
r15
鐢卞叕寮忥紙
5-4
锛夋眰寰楋細
V
r15
锛?/p>
I
f
脳
R
15
锛?/p>
0.003
脳
470
锛?/p>
1.41V
鍏紡锛?/p>
5-4
锛?/p>
鍙嶉鐢佃矾鍘熺悊鍥惧浘锛?/p>
5-7
锛?/p>
Uf
R1
4
1.1
K
R1
3
10K
R1
2
50K
R1
7
153
惟/1W
R1
5
1.5
K
R1
1
10K
150
0P
47P
1
2
4
3
PC
817
R1
5
470
惟/1W
+1
5V
3mA
20mA
2.5
V
Uin