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| 型号： | MAX6848KAYD3+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MON ADJ SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 电池监控器 |
| 电池化学： | 碱性，锂离子，镍镉，镍金属氢化物 |
| 电源电压： | 1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
Low-Power, Adjustable Battery Monitors with
Hysteresis and Integrated μP Reset
Pin Description
PIN
MAX6846/MAX6847 MAX6848/MAX6849
NAME
FUNCTION
1
2
3
1
2
3
V DD
GND
LTHIN
V DD Supply. Device power supply if V DD is greater than V CC .
Ground
LTH Threshold Monitor Input. A resistor-divider network sets the low
threshold associated with LBOL and LBO .
Low-Battery Output, Active-Low, Open-Drain. LBO is asserted when LTHIN
4
—
LBO
drops below the V LTH specification and remains asserted until HTHIN rises
above the V HTH specification for at least 150ms.
Reset Output, Active-Low, Push-Pull, or Open-Drain. RESET goes from high
to low when the V CC input drops below the selected reset threshold and
remains low for the V CC reset timeout period after V CC exceeds the reset
5
5
RESET
threshold. RESET is one-shot edge-trigger pulsed low for the MR reset
timeout period when the MR input is pulled low. RESET is an open-drain
output for the MAX6846/MAX6848, and a push-pull output for the
MAX6847/MAX6849. The push-pull outputs are referenced to V CC . RESET
is guaranteed to be in the correct logic state for V DD or V CC ≥ 10V.
Manual Reset Input, Active-Low, Internal 1.5k ? Pullup to V CC . Pull MR low
6
—
MR
to assert a one-shot reset output pulse for the MR reset timeout period.
Leave unconnected or connect to V CC if unused. The MR input is
debounced for MR rising edges to prevent false reset events.
7
8
7
8
HTHIN
V CC
HTH Threshold Monitor Input. A resistor-divider network sets the high
threshold associated with LBOH and LBO .
V CC Voltage Input. Input for V CC reset threshold monitor and device power
supply if V CC is greater than V DD .
Low-Battery Output High, Active-Low, Open-Drain. LBOH is asserted when
—
6
LBOH
HTHIN drops below the V HTH- specification. LBOH is deasserted when
HTHIN rises above the V HTH+ specification for at least 150ms.
Low-Battery Output Low, Active-Low, Open-Drain. LBOL is asserted when
—
4
LBOL
LTHIN drops below the V LTH- specification. LBOL is deasserted when
LTHIN rises above the V LTH+ specification for at least 150ms.
Detailed Description
The MAX6846–MAX6849 family is available with several
monitoring options. The MAX6846/MAX6847 have single
low-battery outputs and the MAX6848/MAX6849 have
dual low-battery outputs (see Figures 1a and 1b).
The MAX6846–MAX6849 combine a 615mV reference
with two comparators, logic, and timing circuitry to pro-
vide the user with information about the charge state of
the power-supply batteries. The MAX6848/MAX6849
monitor separate high-voltage and low-voltage thresh-
olds to determine battery status. The output(s) can be
used to signal when the battery is charged, when the
battery is low, and when the battery is empty. User-
adjustable thresholds are ideal for monitoring single-
cell Li+ or multicell alkaline/NiCd/NiMH power supplies.
When the power-supply voltage drops below the speci-
fied low threshold, the low-battery output asserts. When
the voltage rises above the specified high threshold fol-
lowing a 150ms (min) timeout period, the low-battery
output is deasserted. This ensures the supply voltage
has stabilized before power-converter or microproces-
sor activity is enabled.
These devices also have an independent μP supervisor
that monitors V CC and provides an active-low reset out-
put. A manual reset function is available to allow the
user to reset the μP with a pushbutton.
6
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6848KAYD7+T | 功能描述:电池管理 Single Adjustable Battery Monitor RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX6848KAYD7-T | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX6848KAZD3 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX6848KAZD3+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6848KAZD3+T | 功能描述:电池管理 Single Adjustable Battery Monitor RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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