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參數資料
| 型號： | MAX6427 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Power, Single/Dual-Level Battery Monitors with Hysteresis |
| 中文描述： | 低功耗、單/雙電平電池監(jiān)測器，帶有滯回 |
| 文件頁數： | 12/20頁 |
| 文件大?。?/td> | 319K |
| 代理商： | MAX6427 |
M
Low-Power, Single/Dual-Level Battery Monitors
with Hysteresis
12
______________________________________________________________________________________
Applications Information
Resistor-Value Selection (Programming
the Adjustable Thresholds)
MAX6433/MAX6434/MAX6435
(See Figure 5)
Use the following steps to determine values for R1, R2,
and R3 of Figure 8.
1)
Choose a value for R
TOTAL
, the sum of R1, R2, and
R3. Because the MAX6433/MAX6434/MAX6435
have very high input impedances, R
TOTAL
can be
up to 5M
.
2)
Calculate R3 based on R
TOTAL
and the desired
upper trip point:
3) Calculate R2 based on R
TOTAL
, R3, and the
desired lower trip point:
4) Calculate R1 based on R
TOTAL
, R3, and R2:
=
MAX6436/MAX6437/MAX6438
(See Figure 6)
Use the following steps to determine values for R1, R2,
and R3 of Figure 8.
1)
Choose a value for R
TOTAL
, the sum of R1, R2, and
R3. Because the MAX6436/MAX6437/MAX6438
have very high input impedances, R
TOTAL
can be
up to 5M
.
2)
Calculate R3 based on R
TOTAL
and the desired
upper trip point:
3) Calculate R2 based on R
TOTAL
, R3, and the
desired lower trip point:
4) Calculate R1 based on R
TOTAL
, R3, and R2:
V
HTH+
= V
HTH-
1.05, V
LTH+
= V
LTH-
1.05
DC-to-DC Converter Application
The MAX6430/MAX6431/MAX6432 and MAX6436/
MAX6437/MAX6438 dual-output battery monitors can
be used in conjunction with a step-up DC-to-DC con-
verter to power 5V microprocessor systems using a sin-
gle Li+ cell or two to three alkaline/NiCd/NiMH cells
(Figure 9). The
LBOH
output indicates that the battery
voltage is weak, and is used to warn the microproces-
sor of potential problems. Armed with this information
the microprocessor can reduce system power con-
sumption. The
LBOL
output indicates the battery is
empty, and system power should be disabled. By con-
necting
LBOL
to the
SHDN
pin of the DC-to-DC con-
verter, power to the microprocessor is removed.
R
R
R
R
TOTAL
1
2
3
=
585
3
mV
V
TRIPLOW
R
R
TOTAL
×
R
V
R
V
mV
V
TRIPHIGH
R
REF
TOTAL
TRIPHIGH
TOTAL
3
585
×
×
=
=
V
LBOL
V
V
mV
LBOL OUTPUT
V
V
V
R
R
+
R
R
R
LBOH OUTPUT
V
V
V
R
R
R
R
R
R
R
R
REF
LTHI
HTHIN
:
TRIPLOW
LTH
REF
TRIPHIGH
REF
TOTAL
/
+
+
/
:
+
+
3
+
+
=
=
=
=
=
=
=
=
N-
-
-
HTL-
585
1
2
3
2
3
1
2
3
1
2
3
LBOH
R
R
R
R
TOTAL
1
2
3
×
R
mV
V
R
R
TOTAL
TRIPLOW
2
615
3
=
R
V
R
V
mV
V
TRIPHIGH
R
REF
TOTAL
TRIPHIGH
TOTAL
3
585
×
×
=
=
V
V
V
mV
R
R
+
1
V
V
V
R
R
R
+
3
V
V
V
R
R
R
R
R
R
R
R
REF
LTHIN
HTHIN
TRIPLOW
LTH
REF
TRIPHIGH
HTL
REF
TOTAL
+
1
+
+
+
1
+
=
=
=
=
=
=
=
=
615
2
3
2
3
2
3
2
3
Figure 9. DC-to-DC Converter Application
μ
P
V
BATT
NMI
V
CC
DC/DC
BATT
OUT
IN
MAX6431
LBOL
LBOH
SHDN
GND
GND
相關PDF資料 |
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| MAX6427__UR-T | Low-Power, Single/Dual-Level Battery Monitors with Hysteresis |
| MAX6428 | Low-Power, Single/Dual-Level Battery Monitors with Hysteresis |
| MAX6429 | Low-Power, Single/Dual-Level Battery Monitors with Hysteresis |
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| MAX6431 | Automotive Catalog LIN Physical Interface 8-SOIC -40 to 125 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX64270RUR+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX6427AGUR | 制造商:Maxim Integrated Products 功能描述:LOW-POWER SINGLE/DUAL-LEVEL BATTER - Rail/Tube |
| MAX6427AGUR+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 3PIN SOT-23 - Rail/Tube |
| MAX6427AGUR+T | 功能描述:電池管理 Single Battery Monitor 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 |
| MAX6427AGUR-T | 功能描述:電池管理 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 |
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