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參數(shù)資料
| 型號： | MAX6787TA+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | ROHS COMPLIANT, TDFN-8 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大小： | 166K |
| 代理商： | MAX6787TA+T |
Monitoring a Battery Voltage Higher
than the Allowable VBATT
For monitoring higher voltages, supply a voltage to BATT,
which is within the specified supply range, and power the
input resistive divider from the high voltage to be moni-
tored. Do not exceed the Absolute Maximum Ratings.
Maintaining Reference Accuracy
Since the ground connection of the MAX6782–MAX6790
has a small series resistance, any current flowing into an
output flows to ground and causes a small voltage to
develop from the internal ground to GND. This has the
effect of slightly increasing the reference voltage. To mini-
mize the effect on the reference voltage, keep the total
output sink current below 3mA.
Adding External Capacitance to Reduce
Noise and Transients
If monitoring voltages in a noisy environment, add a
bypass capacitor of 0.1F from BATT to GND as close
as possible to the device. For systems with large tran-
sients, additional capacitance may be required.
Reverse-Battery Protection
To prevent damage to the device during a reverse-battery
condition, connect the MAX6782–MAX6785 in the configu-
ration shown in Figure 6a or 6b. For the internal reverse-
battery protection to function correctly on the MAX6782–
MAX6790, several conditions must be satisfied:
The connections to IN_/LBL_/LBH_ must be made to
the center node of a resistive divider going from
BATT to GND. The Thevenin equivalent impedance
of the resistive divider must not fall below 1k
in
order to limit the current.
HADJ_ (MAX6782–MAX6785 only) must either be
connected to GND or to the center node of a resis-
tive divider going from REF to GND.
The outputs may only be connected to devices pow-
ered by the same battery as the MAX6782–
MAX6790.
Note that the MAX6782–MAX6790 will not protect other
devices in the circuit.
Additional Application Circuit
Figure 7 shows the MAX6786/MAX6787/MAX6788 in a
typical two-battery-level monitoring circuit.
MAX6782–MAX6790
Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level
Battery Monitors in Small TDFN and TQFN Packages
14
______________________________________________________________________________________
MAX6782
MAX6783
MAX6784
MAX6785
IN_
R1
R2
R1
R2
A) FACTORY PRESET HYSTERESIS CONNECTION
LBO_
REF
HADJ_
GND
BATT
MAX6782
MAX6783
MAX6784
MAX6785
IN_
B) EXTERNAL HYSTERESIS ADJUST CONNECTION
LBO_
REF
HADJ_
GND
BATT
R3
R4
1
Figure 6. Internal Preset or Externally Adjusted Hysteresis
Connection
MAX6786
MAX6787
MAX6788
LBL1
LBO1
LBH1
LBL2
LBH2
GND
BATT
LBO2
Figure 7. Two-Battery-Level Monitor Configuration
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| MAX6788TA+T | Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6788TA+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6788TA+T | 功能描述:電池管理 Dual 1%-Accurate 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 |
| MAX6789TB+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6789TB+T | 功能描述:電池管理 Quad 1%-Accurate 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 |
| MAX6790TB+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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