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參數(shù)資料
| 型號(hào)： | L6924D013TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Battery charger system with integrated power switch for Li-ION/Li-POLYMER |
| 中文描述： | 電池為鋰聚合物集成電源開關(guān)，充電系統(tǒng) |
| 文件頁數(shù)： | 26/38頁 |
| 文件大?。?/td> | 1350K |
| 代理商： | L6924D013TR |
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Application information: monitoring and protection
L6924D
26/38
When the TH pin voltage rises and exceeds the V
MINTH
= 50% of V
REF
(900mV typ), the
L6924D stops the charge, and indicates a fault by the status pins. The device re-starts to
charge the battery, only when the voltage at the TH pin goes under V
MINTH_HYS
= 780mV (typ).
For what concerns the high temperature limit, when the TH pin voltage falls under the V
MAXTH
=
12.5% of V
REF
(225mV Typ.), the L6924D stops the charge until the TH pin voltage rises at the
V
MAXTH_HYS
= 248mV (Typ.).
When the battery is at the low temperature limit, the TH pin voltage is 900mV. The correct
resistance ratio to set the low temperature limit at 0°C can be found with the following formula:
R
V
V
+
Where RUP is the pull-up resistor, V
REF
is equal to 1.8V, and R
NTC0°C
is the value of the NTC
at 0°C. Since at the low temperature limit V
MINTH
= 900mV:
R
°
+
It follows that:
Figure 20. Voltage window with hysteresis On TH
Figure 21. Pin connection
V
MINTH
V
MAXTH
V
MINTH_HYS
V
MAXTH_HYS
900mV
780mV
225mV
248mV
Voltage
Variation on TH pin
Charge disable
Charge enable
L6924D
TH
V
REF
NTC
C
NTC
UP
C
NTC
REF
MINTH
R
R
°
°
×
=
0
0
Eq: 9-1
C
NTC
UP
C
NTC
R
R
°
×
=
0
0
8
9
Eq: 9-2
UP
C
NTC
R
R
=
°
0
Eq: 9-3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6924U | 功能描述:電池管理 USB Battery Charger System w/integra RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| L6924U013TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer |
| L6924UTR | 功能描述:電池管理 Battery Charger USB Compatible RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| L6925 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
| L6925013TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
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