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參數(shù)資料
| 型號： | DS2761AE |
| 英文描述： | High-Precision Li+ Battery Monitor |
| 中文描述： | 高精度鋰電池監(jiān)視器 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 286K |
| 代理商： | DS2761AE |
DS2761
6 of 24
POWER MODES
The DS2761 has two power modes: active and sleep. While in active mode, the DS2761 continually
measures current, voltage, and temperature to provide data to the host system and to support current
accumulation and Li+ safety monitoring. In sleep mode, the DS2761 ceases these activities. The DS2761
enters sleep mode when any of the following conditions occurs:
The PMOD bit in the Status Register has been set to 1 and the DQ line is low for longer than
2s (pack disconnection)
The voltage on V
IN
drops below undervoltage threshold V
UV
for t
UVD
(cell depletion)
The pack is disabled through the issuance of a SWAP command (SWEN bit = 1)
The DS2761 returns to active mode when any of the following occurs:
The PMOD bit has been set to 1 and the SWEN bit is set to 0 and the DQ line is pulled high
(pack connection)
The
PS
pin is pulled low (power switch)
The voltage on PLS becomes greater than the voltage on V
IN
(charger connection) with the SWEN bit
set to 0
The pack is enabled through the issuance of a SWAP command (SWEN bit = 1)
The DS2761 defaults to sleep mode when power is first applied.
Li+ PROTECTION CIRCUITRY
During active mode, the DS2761 constantly monitors cell voltage and current to protect the battery from
overcharge (overvoltage), overdischarge (undervoltage), and excessive charge and discharge currents
(overcurrent, short circuit). Conditions and DS2761 responses are described in the sections below and
summarized in Table 2 and Figure 3.
Table 2.
Li+ PROTECTION CONDITIONS AND DS2761 RESPONSES
ACTIVATION
CONDITION
NAME
THRESHOLD
Overvoltage
V
IN
> V
OV
DELAY
t
OVD
RESPONSE
CC
high
RELEASE
THRESHOLD
V
IN
< V
CE
, or
V
IS
≤
-2mV
V
PLS
> V
DD
(1)
(charger connected)
V
PLS
< V
DD
- V
TP (3)
V
PLS
> V
DD
- V
TP (4)
V
PLS
> V
DD
- V
TP (4)
Undervoltage
V
IN
< V
UV
t
UVD
CC
,
DC
high,
Sleep Mode
CC
,
DC
high
DC
high
DC
high
Overcurrent, Charge
Overcurrent, Discharge
Short Circuit
V
IS
> V
OC(2)
V
IS
< -V
OC(2)
V
SNS
> V
SC
t
OCD
t
OCD
t
SCD
V
IS
= V
IS1
- V
IS2
. Logic high = V
PLS
for
CC
and V
DD
for
DC
.
All voltages are with respect to V
SS
. I
SNS
references current
delivered from pin SNS.
1)
If V
DD
< 2.2V, release is delayed until the recovery charge current (I
RC
) passed from PLS to V
DD
charges the battery and
allows V
DD
to exceed 2.2V.
2)
For the internal sense resistor configuration, the overcurrent thresholds are expressed in terms of current: I
SNS
> I
OC
for
charge direction and I
SNS
< -I
OC
for discharge direction
3)
With test current I
TST
flowing from PLS to V
SS
(pulldown on PLS)
4)
With test current I
TST
flowing from V
DD
to PLS (pullup on PLS)
Overvoltage.
If the cell voltage on V
IN
exceeds the overvoltage threshold, V
OV
, for a period longer than
overvoltage delay, t
OVD
, the DS2761 shuts off the external charge FET and sets the OV flag in the
protection register. When the cell voltage falls below charge enable threshold V
CE
, the DS2761 turns the
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2761AE+ | 功能描述:電池管理 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 |
| DS2761AE+025 | 功能描述:電池管理 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 |
| DS2761AE+025/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC MON BATT LI-ION HP 16-TSSOP |
| DS2761AE+025/T&R | 功能描述:電池管理 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 |
| DS2761AE-025 | 功能描述:電池管理 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 |
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