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參數(shù)資料
| 型號： | MAX6441KANQVD7-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | SOT-23, 8 PIN |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 235K |
| 代理商： | MAX6441KANQVD7-T |
M
Manual Reset
Many microprocessor-based products require manual
reset capability, allowing the operator, a test technician,
or external logic circuitry to initiate a reset while the
monitored supplies remain above their reset thresholds.
These devices have a dedicated active-low
MR
pin.
When
MR
is pulled low,
RESET
asserts a one-shot low
pulse for the
MR
reset timeout period. The
MR
input has
an internal 1.5k
pullup resistor to V
CC
and can be left
unconnected if not used.
MR
can be driven with CMOS-
logic levels, open-drain/open-collector outputs, or a
momentary push-button switch to GND (the MR function
is internally debounced for the t
DEB
timeout period) to
create a manual reset function. If
MR
is driven from long
cables, or if the device is used in a noisy environment,
connect a 0.1μF capacitor from
MR
to GND to provide
additional noise immunity (see Figure 4).
Hysteresis
Hysteresis increases the comparator
’
s noise margin by
increasing the upper threshold or decreasing the lower
threshold. The hysteresis prevents the output from
oscillating (chattering) when V
BATT
is near the low-bat-
tery threshold. This is especially important for applica-
tions where the load on the battery creates significant
fluctuations in battery voltages (see Figure 5).
Applications Information
Li+ Battery Charger Application
The MAX6441/MAX6442 dual-output battery monitors
can be used in conjunction with a battery charger to
provide a system with additional information about the
battery charge state. Many battery chargers, such as
the MAX1879, provide the user with a
CHG
output,
which tells the system when the battery is charged. The
MAX6441/MAX6442 dual-output battery monitors pro-
vide three outputs, which can be used to relay the bat-
tery condition to the system. This information is useful in
determining which system resources can be powered by
the battery at the current charge state (see Figure 6).
with Hysteresis and Integrated μP Reset
10
______________________________________________________________________________________
V
BATT
LBO
t
LBOP
V
HTH
V
LTH
V
HYST
HTH = BATTERY VOLTAGE GOOD, ENABLE OPERATION.
LTH = BATTERY VOLTAGE LOW, SUSPEND/DISABLE OPERATION.
Figure 5. Hysteresis
BATT
GND
1-CELL
Li+
BATTERY
THERM
ADJ
GATE
PULSE-WIDTH
SELECT INPUT
CHG
LED
THERMISTOR
IN
MAX1879
MAX6441
MAX6442
TSEL
GND
LBOL
LBOLH
RESET
LBOH
V
BATT
V
CC
CURRENT-
LIMITED
AC WALL
ADAPTER
IN
OUT
SHDN
DC/DC CONVERTER
Figure 6. Li+ Charger Application (Using MAX1879)
DC/DC
SHDN
MR
V
BATT
RESET
MAX6441
MAX6442
NMI
RESET
μ
P
V
CC
GND
GND
V
CC
Li+
3.6V
LBOL
LBOH
OUT
IN
Figure 7. DC-to-DC Converter Application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6441KANQWD3 | 制造商:Maxim Integrated Products 功能描述:LOW-POWERSINGLE/DUAL-LEVEL BATTERY - Rail/Tube |
| MAX6441KANQWD3+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 1.9V/1.995V 8PIN SOT-23 - Rail/Tube |
| MAX6441KANQWD3+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 |
| MAX6441KANQWD3-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 |
| MAX6441KANQWD7 | 制造商:Maxim Integrated Products 功能描述:LOW-POWERSINGLE/DUAL-LEVEL BATTERY - Rail/Tube |
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