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| 型号： | MAX6431PTUS+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR BAT LP SOT143-4 |
| 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-253-4，TO-253AA |
| 供应商设备封装： | SOT-143-4 |
| 包装： | 带卷 (TR) |
Low-Power, Single/Dual-Level Battery Monitors
with Hysteresis
Applications Information
(See Figure 6)
MAX6436/MAX6437/MAX6438
? R 1 + R 2 + R 3 ?
?
?
R 2 + R 3
? R 1 + R 2 + R 3 ?
?
?
V TRIPLOW LTH - = V REF ?
? R 1 + R 2 + R 3 ?
?
V TRIPHIGH = V HTL- = V REF ?
?
?
?
Resistor-Value Selection (Programming
the Adjustable Thresholds)
MAX6433/MAX6434/MAX6435
(See Figure 5)
V REF = V LTHIN = V HTHIN = 615 mV
V TRIPLOW = V LTH = V REF ? ?
V TRIPHIGH = V HTL = V REF ? ?
R 3
R TOTAL = R 1 + R 2 + R 3
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
V REF = V LTHI N- = V HTHIN - = 585 mV
LBOL / LBOL OUTPUT :
= V
? R 2 + R 3 ?
LBOH / LBOH OUTPUT :
? R 1 + R 2 + R 3 ?
R 3
R TOTAL = R 1 + R 2 + R 3
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:
V REF × R TOTAL
R 3 =
=
upper trip point:
R 3 =
V TRIPHIGH
=
585 mV × R TOTAL
V TRIPHIGH
V REF × R TOTAL 585 mV × R TOTAL
V TRIPHIGH V TRIPHIGH
3) Calculate R2 based on R TOTAL , R3, and the
desired lower trip point:
615 mV × R TOTAL
585 mV × R TOTAL
3) Calculate R2 based on R TOTAL , R3, and the
desired lower trip point:
R 2 = ? R 3
V TRIPLOW
? R 3
V TRIPLOW
4) Calculate R1 based on R TOTAL , R3, and R2:
4) Calculate R1 based on R TOTAL , R3, and R2:
R 1 = R TOTAL
?
R 2
?
R 3
R 1 = R TOTAL
?
R 2
?
R 3
V HTH+ = V HTH- ? 1.05, V LTH+ = V LTH- ? 1.05
DC-to-DC Converter Application
IN
OUT
The MAX6430/MAX6431/MAX6432 and MAX6436/
MAX6437/MAX6438 dual-output battery monitors can
V BATT
DC/DC
V CC
be used in conjunction with a step-up DC-to-DC con-
verter to power 5V microprocessor systems using a sin-
BATT
MAX6431 LBOL
SHDN
μ P
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-
GND
LBOH
NMI
GND
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-
Figure 9. DC-to-DC Converter Application
verter, power to the microprocessor is removed.
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6432AGUS | 制造商:Maxim Integrated Products 功能描述:LOW-POWER SINGLE/DUAL-LEVEL BATTER - Rail/Tube |
| MAX6432AGUS+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 4PIN SOT-143 - Rail/Tube |
| MAX6432AGUS+T | 功能描述:电池管理 Dual 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 |
| MAX6432AGUS-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 |
| MAX6432AHUS | 制造商:Maxim Integrated Products 功能描述:LOW-POWER SINGLE/DUAL-LEVEL BATTER - Rail/Tube |
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