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(yè)數(shù)： 27/38頁(yè)
文件大?。?/td> 1350K
代理商： L6924D013TR
L6924D
Application information: monitoring and protection
27/38
Similarly, when the battery is at the high temperature limit, the TH pin voltage is 225mV. The
correct resistance ratio to set the high temperature limit at 50°C can be found with the following
formula:
Where R
NTC50°C
is the value of the NTC at 50°C. Considering V
MAXTH
= 225mV it follows that:
R
+
Consequently:
Based on equations 9-3 and 9-6, it derives that:
The temperature hysteresis can be estimated by the formula:
Where V
TH
is the pin voltage threshold on the rising edge, V
TH_HYS
is the pin voltage threshold
on the falling edge, and NTC
T
(- %/°C) is the negative temperature coefficient of the NTC at
temperature (T) expressed in % resistance change per °C. For NTC
T
values, see the
characteristics of the NTC manufacturers (e.g. the 2322615 series by VISHAY). At the low
temperature, the hysteresis is approximately:
Obviously at the high temperature hysteresis is:
Considering typical values for NTC
0°C
and NTC
50°C
, the hysteresis is:
And:
C
NTC
UP
C
NTC
+
REF
MAXTH
V
R
R
R
V
°
°
×
=
50
50
Eq: 9-4
C
NTC
UP
C
NTC
R
R
°
°
×
=
50
50
8
225
.
Eq: 9-5
7
50
UP
C
NTC
R
R
=
°
Eq: 9-6
7
50
0
=
°
°
C
NTC
C
NTC
R
R
Eq: 9-7
T
TH
HYS
TH
NTC
TH
V
HYS
V
V
T
×
=
_
Eq: 9-8
C
NTC
mV
mV
°
0
mV
T
C
HYS
×
=
°
900
780
900
0
Eq: 9-9
C
NTC
mV
mV
50
mV
T
C
HYS
°
×
°
225
248
225
50
Eq: 9-10
C
mV
mV
051
mV
T
C
HYS
o
5
.
×
900
780
900
0
=
°
Eq: 9-11
C
mV
mV
039
mV
T
C
HYS
o
5
.
×
225
248
225
50
=
°
Eq: 9-12
相關(guān)PDF資料
PDF描述
L6925 HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925013TR HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6925D HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
L6926013TR High efficiency monolithic synchronous step down regulator
L6926D1 High efficiency monolithic synchronous step down regulator
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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