1~多节锂电池充电管理IC

຅ක઼ཥ๕ʿ̂ཥ流೻ʕ, IC ਈ಻ཥϫ ๝度, 若Υ˷๝度ᇍఖ, ‫ۆ‬ආɝ̂ཥ流೻.
Չʕ Tdet ʱᏀ: 若 LST345-KZ ภৣ̮ ટཥ‫(ڜ‬TR), 10K ohm, ‫ۆ‬:
̂ཥ๝度ᇍఖ(Э๝): 1ĘC ̂ཥ๝度ᇍఖ(৷๝): 48ĘC ‫ܨ‬復̂ཥ๝度ᇍఖ(Э๝): 4ĘC ‫ܨ‬復̂ཥ๝度ᇍఖ(৷๝): 45ĘC 若൴˷ɪࠑᇍఖ, ‫މۆ‬๝度異੬. уੂ行: 1.) ࣛග‫ڭ‬ᚐࠇࣛᅲ৾ 2.) ৾˟̂ཥཥ流 3.) LED ᜑͪ̂ཥʕዱ໮ ‫ܙ‬๝度‫ܨ‬復͍੬ᇍఖ, Ύࠠอ̂ཥ流೻. 若不Դ͜๝度‫ڭ‬ᚐ̌ঐ, Ϥ໔̙ٜટટ ̮௅ L431 ٙ Ref(參ϽཥᏀ)໔З.
¾ ໔Зत‫׌‬說‫׼‬: Vdd (፩ɝཥ๕): IC ʫ‫ܔ‬ၚ๟ཥᏀˢ༰ᇞ路, ਈ಻࠽ၾʈ
ЪཥᏀ޴ᗫ聯, ‫ܔ‬ᙄʈЪཥᏀʘ፩ɝཥ๕ ‫ މ‬4.5V.
¼ LEDR(ߎЍ LED ̂ཥ狀࿒፩̈),
LEDG(綠Ѝ LED ཱི̂狀࿒፩̈):
ЭཥЗਗЪ. 若ᚨਗཥ流= 10mA, ‫ܔۆ‬
ᙄટ 330 ohm ཥ‫ڜ‬ၾ LED(ජ฽)Ї VDD.
Multi-cells Li Battery Charger Controller εᒶ቞ཥཥϫ̂ཥછՓIC LS977-L79
¾ त‫ ׌‬Features ¼ ཥϫໄɝਈ಻, ԱཥϫཥᏀૢ΁ආɝ ޴࿁Ꮠ̂ཥ狀࿒. ¼ ֛ཥ流̂ཥᅼό; Ҟ̂̂ཥཥ流࠽, ̙̮͟௅ཥ‫ڜ‬ண֛ሜ዆. ¼ ཀ‫׳‬ཥཥϫ, ˸ʃཥ流ཫ̂(Pre-charge), ˸‫ڭ‬ᚐཥϫ. ¼ ɓছ͍੬ཥϫཥᏀ, ‫˸ۆ‬ண֛࠽, ЪҞ̂(Fast Charge)流೻. ¼ ˸ཥϫіϗ̂ཥཥ流࠽, Ъၚ๟ཱི̂к й (Current Termination). ¼ ཱི̂ཥϫ(Vfast), уҁΌ୞˟̂ཥ. ¼ εࠠ቞ཥ‫ڭ‬ᚐ: ཀ̂ཥཥᏀ‫ڭ‬ᚐ, ཀ̂ཥཥ流‫ڭ‬ᚐ, ཀ‫׳‬ཥཥϫ‫ڭ‬ᚐ. ¼ ๝度‫ڭ‬ᚐ: ̂ཥ๝度ᇍఖ‫ڭ‬ᚐ, ‫ܨ‬復̂ཥ๝度ᇍఖ‫ڭ‬ᚐ. ¼ ̂ཥࣛග‫ڭ‬ᚐ: ཫ̂ࣛග‫ڭ‬ᚐ, Ҟ̂ࣛ ග‫ڭ‬ᚐ. ¼ ཱི̂ཥϫ͊՟̈, ຅ཥϫཥᏀɨ降 ཀЭ, ‫ࠠۆ‬อ઼ਗҞ̂流೻.
Q1
PMOS, LSP01
S
D
L1
Layout:1A
10uH/1A
+
+
C6
R7
G
D1
R10
C7
CE, 100uf
220R, 1/4W
1N5817
1K
CE, 10uf
R1
20R
Vdd 4.5V
Remark: C2, C3, C5 must close to U1
R2 1K2, 1%
U2 L431
R3 1K5, 1%
¼ PWM (֛ཥ流̂ཥ৙路છՓ፩̈): ‫̂׵‬ཥಂග(ཫ̂‫א‬Ҟ̂), PWM ໔З‫ت‬
Җ‫މ‬৷᎖এላ˙ό. ਗЪࣛ‫މ‬৷ཥЗ, ˸ ‫֛ܵڭ‬ཥ流ʘ̂ཥཥ流; ຅̂ཥཥ流ɽ‫׵‬ ண֛/ཫ֛࠽, ‫א‬ཥϫཥᏀɽ‫֛׵‬ཥᏀ࠽, ‫ۆ‬不ਗЪ, ˸ᗫௐ(降Э)̂ཥཥ流‫א‬ཥϫ ཥᏀ.
¾ ༶͜: 1~ N ᒶ቞ཥ̂ཥ༶͜, ν便ᙳό DVD ᅧ‫׳‬ዚ, LCD ཥൖ, 行ਗཥ๕.
¾ ໔З說‫ ׼‬Pin Assignment
໔數
ᔊ၈ ፩̈ɝ 說‫׼‬
1
NC -
٤໔
2
Vdet I
ཥϫཥᏀਈ಻፩ɝ
3
Tdet I
Temperature Detect ๝度ਈ಻፩ɝ
4
Idet I
̂ཥཥ流ਈ಻፩ɝ
5
GND P
Ground ཥ๕ટή
6
Vdd P
Power Input ཥ๕፩ɝ
7
Timer I
̂ཥࣛග‫ڭ‬ᚐ, ࣛගண֛፩ɝ
8
LEDR O
ߎЍ LED ̂ཥ狀࿒፩̈
9
LEDG O
綠Ѝ LE৙路છՓ፩̈
LS977-L79: Multi-cells Li battery charger IC
¾ ̂ཥᅼόၾϜᇞྡ Charge Curve
Vin Vbat
Ic Mode LED
Vpre
Pre-charge
Fast-Charge CC mode
Vfull Charge termination
CV mode
¾ ༶Ъ˙ό Operation A.) ઼ਗཥ๕(Power On): ආɝІҢ಻༊ᅼό. B.) ๝度‫ڭ‬ᚐ(Temperature Protect): ʫ‫ܔ‬๝度讀՟кᓙᓃ(Temperature detect), ຅̮ટ‫׵‬ ཥϫʫʘᆠઽཥ‫ڜ‬Ϋෂ๝度ཀ৷, 立у੶ࠗ୞˟̂ཥ流೻, ˸ᆽ‫ڭ‬ཥϫτΌ. C.) ཫ௪̂ཥ(Pre-Charge) (уཀ‫׳‬ཥᏀ‫ڭ‬ᚐᅼό): 若ཥϫ‫މ‬ཀ‫׳‬ཥ狀࿒, ‫˸ۆ‬ ʃཥ流֛流(Constant Current)̂ཥ˸‫ڭ‬ᚐཥϫྪն. D.) ཫ௪̂ཥࣛග‫ڭ‬ᚐ: ཫ̂ࣛග୞˟, 若͊ҁϓཫ̂流೻, ‫੶ۆ‬行୞˟異੬ཥϫٙ̂ ཥ流೻. E.) Ҟ஺̂ཥ(Fast Charge): 若ཥϫ‫͍މ‬੬狀࿒, ‫˸ۆ‬ண֛Ҟ̂ཥ流࠽, ֛流(Constant Current)̂ཥ˸Ҟ஺ཱི̂ཥϫ. F.) Ҟ஺̂ཥࣛග‫ڭ‬ᚐ: Ҟ̂ࣛග୞˟, 若͊ҁϓҞ̂流೻, ‫ۆ‬୞˟Ҟ̂流೻, ൖ‫̂މ‬ ཱི. G.) ֛ཥᏀ̂ཥ(Constant Voltage) (уཀ̂ཥᏀ‫ڭ‬ᚐᅼό): ຅ཥϫཥᏀ༺ཥᏀཱི̂࠽ (Voltage Full), ‫֛˸ۆ‬ཥᏀ˙ό, ܵᚃ̂ཥ. H.) ୞˟̂ཥ(Charge Termination): ຅̂ཥཥ流ʃ‫׵‬ண֛ཥ流࠽ Ifull ࣛ, ˾‫ڌ‬ཥϫᆽྼ ཱི̂, 立у୞˟̂ཥ. I.) ࠠอ̂ཥ(Re-start): ཱི̂ཥϫ͊՟̈, ຅ཥϫཥᏀɨ降ཀЭ, ‫ࠠۆ‬อ઼ਗҞ̂流೻.
IC ʫ௅ண֛ཫ̂ʃཥ流ʘ֛ཥ流= 0.2C.
¼ Vdet (ཥϫཥᏀਈ಻፩ɝ): Vdet ໔Зʫ௅݊Ա 1 ᒶཥϫཥᏀ࠽ਗЪ,
සቇ͜‫ ׵‬1 ᒶཥϫʘ༶Ъ.ٜટ‫׵‬ཥϫ͍၌. 若ཥϫཥᏀʃ‫ ׵‬Vmin, IC ึੂ行ཫ̂
(Pre-Charge)流೻. уཀ‫׳‬ཥʘཥϫ, Іਗ ˸༰ʃ֛ཥ流(ཫ̂ཥ流)̂ཥ, ˸‫ڭ‬ᚐ ཥϫྪն.
1
Rev. cr1.2
This Spec. may be changed without Notice.
Multi-cells Li Battery Charger Controller εᒶ቞ཥཥϫ̂ཥછՓIC LS977-L79
C5 0.1uf
Q2 NPN, 3904
Vdet R9 100K
Idet
Vdd 4.5V
D2 1N5817
R11 10K, 1%
Tdet
Layout:1A
BAT1 Li, 1S 1500mAh
NTC1 10K LST345-KZ
Layout:1A
Rc1 0R2, 1%, 1/4W Ic= 100mV / 0R2 ~ 500mA
LED ᜑͪᅼό:
ධϣ 狀࿒
ᜑͪ
ཥ๕ක઼ ߎ綠ʹಁ ࿔৪ ϣ
ೌཥϫ ဥ๘
̂ཥ
ߎዱ‫ܩ‬亮
ཱི̂
綠ዱ‫ܩ‬亮
異੬
ߎ綠ʹಁҞ৪
௪ൗ Ҟ৪: 1 ϣ 0.5 ߆;
у 0.25 ߆亮, 0.25 ߆ဥ๘.
࿔৪: 1 ϣ 1 ߆;у 0.5 ߆亮, 0.5 ߆ဥ๘.
若ཥϫཥᏀɽ‫ ׵‬Vmin, IC ึੂ行Ҟ̂ (Fast Charge)流೻. у͍੬ཥᏀʘཥϫ, І ਗ˸ண֛ʘ֛ཥ流(Ҟ̂ཥ流)̂ཥ, ˸Ҟ ஺̂ཥ.
若ཥϫཥᏀഃ‫(׵‬ટ‫)ڐ‬Vfast ࣛ, IC ึੂ 行֛ཥᏀ̂ཥ流೻. ཥϫіϗ̂ཥ流஼န 降Э, ຅ʃ‫ ׵‬Ifull ཫண࠽(0.15C)ࣛ, ‫ۆ‬ LED ᔷ‫ཱི̂މ‬ዱ໮; ˾‫ڌ‬ཥϫཱི̂, Ԩ立 у୞˟̂ཥ.
¼ Idet (̂ཥཥ流ਈ಻፩ɝ): ̮ટ̂ཥཥ流ண֛ʘཥ‫(ڜ‬Rc), ໄ‫׵‬ཥ
ϫʘࠋ၌. Չʕʘ̂ཥཥ流ண֛࠽ (‫א‬၈ 1C)= 100 mV /Rc.
若̂ཥཥ流ɽ‫׵‬ண֛࠽, ʫ௅уᗫௐ PWM ໔ЗਗЪ, 若̂ཥཥ流ʃ‫׵‬ண֛࠽, ʫ௅уක઼ PWM ໔ЗਗЪ.
‫ڌ‬ତ‫̮׵‬௅ྼყᇞ路ʘ̂ཥཥ流࠽ա IC ʫ௅, ၾ̮௅ MOS ਗЪˀᏐҞ࿔Ͼᅂᚤ, ɓছႬࢨߒ‫މ‬ண֛࠽,ʘ+/-10%.
LS977-L79: Multi-cells Li battery charger IC
2
Rev. cr1.2
This Spec. may be changed without Notice.
Multi-cells Li Battery Charger Controller εᒶ቞ཥཥϫ̂ཥછՓIC LS977-L79
LS977-L79: Multi-cells Li battery charger IC
4
Rev. cr1.2
This Spec. may be changed without Notice.
¾ ཥϫཥᏀၾ࿁Ꮠ̂ཥཥ流 (௪ൗ 1C ‫ڌ‬ண֛ʘ̂ཥཥ流)
ධϣ
ʫ࢙
ཥϫཥᏀкй
̂ཥཥ流
1 ཫ̂ (ཥϫཀ‫׳‬ཥ) Vplug <= Vbat < Vmin 0.2C
2 Ҟ̂ (֛ཥ流)
Vmin <= Vbat < Vfast 1C
3 Ҟ̂ (֛ཥᏀ)
Vbat = Vfast
1C~ 0.15C
Ш若ϤࣛཥϫཥᏀЭ‫ ׵‬Vfull-error, ‫ۆ‬ൖ ‫މ‬異੬.
ཱི̂‫ܝ‬ʘཥϫ, ΪІ್‫׳‬ཥ, ՉཥᏀ若 Э‫ ׵‬Vre-charge ࠽, ‫ࠠۆ‬อආɝҞ̂流೻.