- 您现在的位置：买卖IC网 > PDF目录15531 > PS501-I/SS (Microchip Technology)IC FIELD REPROG BATT MGR 28SSOP PDF资料下载
参数资料
| 型号： | PS501-I/SS |
| 厂商： | Microchip Technology |
| 文件页数： | 5/42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 |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
PS501
2.0
A/D OPERATION
EQUATION 2-1:
The PS501 A/D converter measures current, voltage
and temperature and integrates the current over time to
predict State-Of-Charge. Pack voltage and individual
cell voltages are monitored and can be individually cal-
ibrated for the best accuracy. Using an external sense
resistor, current is monitored during both charge and
discharge and is integrated over time using the on-chip
oscillator as the time base. Temperature is measured
from the on-chip temperature sensor or an optional
external thermistor. Current and temperature are also
calibrated for accuracy.
9.15 mV/R SENSE (milli-Ohms) = Current LSB
(Minimum current measurement if > NullCurr )
Current LSB x 16384 = Maximum current
measurement possible
In-circuit calibration of the current is done using the
SMBus interface at time of manufacture to obtain
absolute accuracy. The current measurement equation
is:
EQUATION 2-2:
2.1
A/D Converter List
I(ma) = (I_A/D – COCurr ) * CFCurr /16384
The A/D converter alternately measures pack voltage,
cell voltages, current, temperature and auto-offset as
explained below. The schedule for the sequence and
frequency of these measurements is programmable, as
is the number of bits used. The default scheduling uses
three lists. At near full (above the voltage point
ADLNearFull ) and near empty (below the voltage point
ADLNearEmpty ), voltage intensive lists are used to
accurately end charge or discharge. In between
ADLNearFull and ADLNearEmpty , a current intensive
schedule is used to more accurately calculate capacity.
where:
I_A/D is the internal measurement
COCurr is the “Correction Offset for Current” which
compensates for any offset error in current
measurement stored in EEPROM.
CFCurr is the “Correction Factor for Current” which
compensates for any variances in the actual sense
resistance over varying currents stored in EEPROM.
CFCurr values.
2.2
Current Measurement
FIGURE 2-1:
COCurr AND CFCurr
The A/D input channels for current measurement are
the RSHP and RSHN pins. The current is measured
using an integrating method, which averages over time
to get the current measurement and integrates over
time to get a precise measurement value.
A 5 to 600 milli-Ohm sense resistor is connected to
RSHP and RSHN as shown in the example schematic.
The maximum input voltage at either RSHP or RSHN is
+/-150 mV. The sense resistor should be properly sized
Raw Measurement
VALUE RELATIONSHIP
Ideal A/D Response
Actual A/D
Response
to accommodate the lowest and highest expected
charge and discharge currents, including suspend
and/or standby currents.
Circuit traces from the sense resistor should be as
short as practical without significant crossovers or
feedthroughs. Failure to use a single ground reference
point at the negative side of the sense resistor can
significantly degrade current measurement accuracy.
COCurr
CFCurr
Actual Current
The EEPROM value, NullCurr , represents the zero
zone current of the battery. This is provided as a
2.3
Auto-Offset Compensation
calibration guardband for reading zero current. Cur-
rents below the +/- NullCurr (in mA) limit are read as
zero and are not included in the capacity algorithm
calculations. A typical value for NullCurr is 3 mA, so
currents between -3 mA and +3 mA will be reported as
zero and not included in the capacity calculations.
The equation for current measurement resolution and
sense resistor selection is shown in the following
equation.
? 2004 Microchip Technology Inc.
Accuracy drift is prevented using an automatic auto-
zero self-calibration method, which ‘re-zeroes’ the
current measurement circuit every AOMInt * 0.5 sec-
onds when enabled. This feature can correct for drift in
temperature during operation. The auto-offset compen-
sation circuit works internally by disconnecting the
RSHP and RSHN inputs and internally shorting these
inputs to measure the zero input offset. The EEPROM
and calibration value COD is the true zero offset value
of the particular module.
DS21818C-page 5
相关PDF资料 |
PDF描述 |
|---|---|
| 101-1327 | KIT DEV STANDARD RCM6700 |
| PS7051 | IC BATTERY MONITOR ONE CELL PROT |
| V110C8C75BG2 | CONVERTER MOD DC/DC 8V 75W |
| V110C8C75BG | CONVERTER MOD DC/DC 8V 75W |
| V110C8C75BF2 | CONVERTER MOD DC/DC 8V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
发布紧急采购，3分钟左右您将得到回复。