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參數(shù)資料
| 型號： | DS2782 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Stand-Alone Fuel Gauge IC |
| 中文描述： | 獨立式電量計IC |
| 文件頁數(shù)： | 7/25頁 |
| 文件大?。?/td> | 291K |
| 代理商： | DS2782 |
DS2782: Stand-Alone Fuel Gauge IC
7 of 25
Figure 3. Multicell Application Example
Pack+
SDA
SNS
VDD
VSS
RSNS
Pack-
SDA
Protection
Circuit
DS2782
PIO
150
150
SCL
Multi-Cell
Li-Ion
Battery
0.1uF
NC
VIN
(n * R)
(1)
(1)
(1) Components improve IEC1004 Air/Contact ESD compliance
R
MAX1615
4.7uF
0.1uF
500
SCL
POWER MODES
The DS2782 has two power modes: ACTIVE and SLEEP. On initial power up, the DS2782 defaults to ACTIVE
mode. While in ACTIVE mode, the DS2782 is fully functional with measurements and capacity estimation
continuously updated. In SLEEP mode, the DS2782 conserves power by disabling measurement and capacity
estimation functions, but preserves register contents. SLEEP mode is entered under two different conditions and
an enable bit for each condition makes entry into SLEEP optional. SLEEP mode can be enabled using the Power
Mode (PMOD) bit or the Under Voltage Enable (UVEN) bit.
The PMOD type SLEEP is entered if the PMOD bit is set AND a bus low condition occurs. A bus low condition,
where both SDA AND SCL low for t
SLEEP
(2s nominal), is used to detect a pack disconnection or system shutdown
in which the bus pull-up voltage, V
PULLUP
, is not present. PMOD SLEEP assumes that no charge or discharge
current will flow and therefore coulomb counting is not necessary. A system with PMOD SLEEP enabled must
ensure that a standalone or cradle charger includes a pull-up on SDA and/or SCL. The DS2782 transitions from
PMOD SLEEP to ACTIVE mode when either SDA or SCL is pulled high.
The second option for entering SLEEP is an under voltage condition measured on VIN. When the UVEN bit is set,
the DS2782 will transition to SLEEP if the voltage on VIN is less than V
SLEEP
(2.45V nominal) AND the 2-Wire bus
is in a bus high or a bus low condition for t
SLEEP
. UVEN SLEEP relieves the battery of the DS2782 load until
communication resumes to prevent over discharging the battery. The DS2782 transitions from UVEN SLEEP to
ACTIVE mode when either SDA or SCL change logic state. The bus master should initiate a transaction after
charging of a depleted battery begins.
Note:
PMOD and UVEN SLEEP features must be disabled when a battery is charged on an external charger that
does not connect to SDA and/or SCL. PMOD SLEEP can be used if the charger pulls the bus high. The DS2782
remains in SLEEP and therefore does not measure or accumulate current when a battery is charged on a charger
that fails to properly drive the communication bus.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2782_09 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
| DS2782BE | 制造商:Maxim Integrated Products 功能描述:STAND ALONE FG IC 2WIRE 8P TSSOP - Rail/Tube |
| DS2782BE/T&R | 制造商:Maxim Integrated Products 功能描述:STAND ALONG FG IC 2WIRE 8P TSSOP TR - Tape and Reel |
| DS2782E+ | 功能描述:電池管理 Stand-Alone Fuel Gauge 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 |
| DS2782E+R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
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