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| 型号： | PS501-I/SS |
| 厂商： | Microchip Technology |
| 文件页数： | 14/42页 |
| 文件大小： | 0K |
| 描述： | IC FIELD REPROG BATT MGR 28SSOP |
| 标准包装： | 47 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 5.6 V ~ 18 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
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PS501
5.1
Full Charge Detection Methods
5.2
Temperature Algorithms
For a typical Lithium Ion constant-current/constant-
voltage charge system, the PS501 will monitor the
taper current that enters the battery once the battery
has reached the final voltage level of the charger. Once
the taper current falls to a certain level, indicating that
the battery is full, the End-Of-Charge (EOC) will be trig-
gered. Different taper currents will be used for different
temperatures. See the parameter explanation in
When a valid fully charged EOC condition is detected,
the following actions occur:
? The FULLY_CHARGED status bit (bit 5) in the
SBData value of BatteryStatus is set to ‘ 1 ’ to
indicate a full condition. (This will remain set until
RelativeStateOfCharge drops below the
ClrFullyChrg value in EEPROM.)
? RelativeStateOfCharge is set to 100%.
? ChargingCurrent is set to ChrgCurrOff value.
? SBData value for MaxError is cleared to zero
percent (0%).
The PS501 SMBus Smart Battery IC provides multiple
temperature alarm set points and charging conditions.
The following EEPROM parameters control how the
temperature alarms and charging conditions operate.
HighTempAl: When the measured temperature is
greater than HighTempAl , the OVER_TEMP_ALARM
is set. If the battery is charging, then the
TERMINATE_CHARGE_ALARM is also set.
ChrgMinTemp, DischrgMaxTemp and ChrgMaxTemp:
If the measured temperature is less than ChrgMinTemp ,
the ChargingCurrent is set to ChrgCurrOff and the
ChargingVoltage is set to ChrgVolt to communicate to
the charger that the non-charging state of current and
voltage should be given. When measured temperature
is greater than ChrgMaxTemp and the system is charg-
ing, or greater than DischrgMaxTemp and the system is
discharging, then ChargingCurrent is set to ChrgCurrOff
and the ChargingVoltage is set to ChrgVoltOff
also. Otherwise, ChargingCurrent = ChrgCurr and
ChargingVoltage = ChrgVolt .
? The TERMINATE_CHARGE_ALARM bit (bit 14)
is set in BatteryStatus and an AlarmWarning
6.0
CELL BALANCING
broadcast is sent to the SMBus Host and Smart
Battery Charger addresses.
? The OverChrg value is incremented for any
charge received above 100% after a valid fully
charged EOC condition.
? Control flags for internal operations are set to
indicate a valid full charge condition was
achieved.
? Other BatteryStatus or AlarmWarning flag bits
may also be set depending on the conditions
causing the EOC.
- The charge timer, EOCTimer, is exceeded
- Cell voltage is higher than TCAVolt
DS21818C-page 14
The PS501 has internal cell balancing loads with which
to draw extra current away from higher voltage cells.
There are internal 500 ohm resistors, which will draw
up to 8.4 mA of current from each cell, depending on
the cell voltage. The cell balancing algorithm will moni-
tor individual cell voltages and the difference between
them. When the difference between any cells exceeds
the EEPROM parameter, VcelldiffMax , the resistor
load will be applied to the higher cell until it is within
VcelldiffresetMax of the lowest. Cell balancing will
only be applied during the charging state to maintain
run time during discharge.
Determination of cell balance requirement will be made
near End-Of-Charge, when the capacity difference
results in a cell voltage difference. Once this determina-
tion is made, cell balancing will commence on the
charge cycle and remain in effect for the entire charge
cycle. Upon discharging, cell balancing will be disabled
to preserve run time. Once the near empty point is
reached again, determination will be made as to
whether correct hysteresis has been reached to disable
the cell balancing for the next charge cycle.
? 2004 Microchip Technology Inc.
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相关代理商/技术参数 |
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| PS501T | 功能描述:电池管理 SBS1.1 Fuel Gauge 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 |
| PS501T-I/SS | 功能描述:IC BATTERY MANAGER REPROG 28SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品变化通告:BQ77908, BQ77910 Discontinuation 20/Mar/2012 标准包装:1 系列:- 功能:电池监控器，过压/欠压保护 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:5.6 V ~ 35 V 工作温度:-25°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:38-TSSOP 包装:剪切带 (CT) 其它名称:296-28784-1 |
| PS502 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| PS-5020APL05 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| PS5022 | 制造商:PREMO 制造商全称:PREMO CORPORATION S.L 功能描述:SMD Power Inductors Shielded |
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