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| 型号： | MAX6428BIUR+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR BAT LP SOT23-3 |
| 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： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 带卷 (TR) |
Low-Power, Single/Dual-Level Battery Monitors
with Hysteresis
Detailed Description
The MAX6427–MAX6438 family is available with several
monitoring options. The MAX6427/MAX6428/MAX6429
offer factory-trimmed battery-monitor thresholds, with a
single low-battery output (see Figure 1). The
MAX6430/MAX6431/MAX6432 also feature factory-
trimmed thresholds, but have two low-battery outputs
(see Figure 2). The factory-trimmed thresholds of the
MAX6427 –MAX6432 eliminate the requirement for
external components.
The user sets the threshold voltages for the
MAX6433–MAX6438, which permit the user to select
the hysteresis range, and consequently the sensitivity
of the system to noise. A wide hysteresis range pre-
vents chattering that can result during battery recovery
or load removal. The MAX6433/MAX6434/ MAX6435
have single low-battery outputs and the MAX6436/
MAX6437/MAX6438 have dual low-battery outputs (see
Figures 3 and 4).
The MAX6427–MAX6438 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 MAX6427–MAX6438
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. Factory-
V BATT
trimmed thresholds are ideal for monitoring single-cell
Li+ or multicell alkaline/NiCd/NiMH power supplies.
User-programmable versions are also available with
thresholds determined using an external resistor-
divider (see Resistor-Value Selection ).The adjustable
versions can monitor down to 0.62V, making them suit-
able for monitoring single-cell alkaline, NiMH, and NiCd
applications (V DD ≥ 1.6V).
When the power-supply voltage drops below the speci-
fied low threshold, the low-battery output asserts (see
Low-Battery Output ). When the voltage rises above the
specified high threshold following a 140ms (min) time-
out period, the low-battery output is deasserted (see
Threshold Monitoring ). This ensures the supply voltage
has stabilized before power-converter or microproces-
sor activity is enabled.
Low-Battery Output
The low-battery outputs are available in active-low
( LBO , LBOH , LBOL , push-pull and open-drain) and
active-high (LBO, LBOL, LBOH, open-drain) configura-
tions. Push-pull outputs are referenced to BATT (for
factory-trimmed versions) or V DD (for adjustable thresh-
old versions).
The open-drain devices can be pulled to a voltage inde-
pendent of V DD or BATT, up to 5.5V. This allows the
R
Q
V BATT
LBO TIMEOUT
S
Q
LBO
(LBO)
615
mV
+
-
PERIOD
( ) ARE FOR THE MAX6429
Figure 1. MAX6427/MAX6428/MAX6429 Functional Diagram
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6428BJUR | 制造商:Maxim Integrated Products 功能描述:LOW-POWER SINGLE/DUAL-LEVEL BATTER - Rail/Tube |
| MAX6428BJUR+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 3PIN SOT-23 - Rail/Tube |
| MAX6428BJUR+T | 功能描述:电池管理 Single 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 |
| MAX6428BJUR-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 |
| MAX6428CGUR | 制造商:Maxim Integrated Products 功能描述:LOW-POWER SINGLE/DUAL-LEVEL BATTER - Rail/Tube |
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