参数资料
| 型号： | SC900841JVKR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 126/192页 |
| 文件大小： | 0K |
| 描述： | IC POWER MGT 338-MAPBGA |
| 标准包装： | 2,000 |
| 应用： | PC，PDA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 338-TFBGA |
| 供应商设备封装： | 338-MAPBGA |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第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页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页当前第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页
FUNCTIONAL DEVICE OPERATION
BATTERY INTERFACE AND POWER PATH MANAGEMENT
and the total trickle charge time has not expired. If the trickle
charge time expires before V BAT exceeding V TRKL , the
charger is turned off and the appropriate state is set. If V BAT
rises above V TRKL before the trickle charge time expires, we
enter in the Quick Charge stage and I CHGCC is used for
charging. At any time during trickle charging, if a fault occurs,
the charger turns off and an interrupt is asserted, according
to the type of fault. The trickle charge time is always set to 1/
4 of the set t CHG timer. The t CHG timer is reset when entering
the trickle charge mode. V TRKL detection is equipped with a
32 ms filter to debounce the transition between Trickle and
Quick Charge modes. Regardless of the timer state, if V BAT
rises above V TRKL , then the BATDET interrupt signal is
asserted.
Trickle charging can be forced as well, by setting the bit
TRICKLE = 1. In this case, the full t CHG timer is used during
trickle charge. In this mode, charging stops if the timer
expires or V BAT exceeds V CHGCV triggers the EOC on forced
trickle mode.
QUICK CHARGE
The fast charge includes the CC mode and the CV mode.
A soft transition between the trickle mode and the CC mode
is required to minimize the transient behavior at the input
during the transition. The Constant Current value (I CHGCC )
can be set by SPI programming the CHRGCC[2:0] bits, and
is regulated as explained previously. Once entering the CV
mode, the battery voltage is held at the battery float voltage
threshold V CHGCV , which can be set by SPI programming the
CHRGCV[3:0] bits. The charge current reduces gradually
until the end of charge event EOC. The total charge time for
the quick charge is limited by t CHG .
The t CHG timer is reset when entering the fast charge
mode.
If the battery voltage V BAT exceeds the over-voltage
threshold set by SPI programming the OVRVOLT[1:0] bits,
the buck charger is turned off and the BATOVP interrupt
signal is asserted.
END-OF-CHARGE (EOC)
For a charge cycle to be completed (EOC), two conditions
are required to be simultaneously met: the battery voltage
must be above the recharge threshold V RCHG , and the
charge current must fall below the EOC current I CHGCOMP .
I CHGCOMP can be set by SPI programming the
CHRGCOMP[2:0] bits. A 1.0 ms filter is required to prevent
fast transient current, triggering the EOC current threshold.
Quick
V CHGCV
I C HGCC
Trickle
CC
Charge
CV
V RCH G
Voltage
Charge
Current
V TRKL
I TRKL
I C HGCOMP
COMP
Interrupt
TIME
Figure 64. EOC Behavior
WATCHDOG TIMER
The charger is equipped with a watchdog timer that the
Platform controller hub can enable and set for different times.
NTC INTERFACE
A battery pack may be equipped with a thermistor which
value decreases over temperature (NTC). The NTC interface
allows an external NTC thermistor to monitor the battery
temperature and disable the charger when the temperature is
outside of a specific window. The relationship between
temperature T (in Kelvin) and the thermistor value (RT) is well
characterized, and can be described as R T =R 0 *e^(B*(1/T – 1/
T 0 ), with T 0 being room temperature, R 0 the thermistor value
at T 0 , and B being the so called B-factor which indicates the
slope of the thermistor over temperature. The NTC interface
can handle several standard B factors such as 3200, 3500,
and 3900.
To read out the thermistor value, it is biased through a pull-
up resistor R NTC from the VNTC pin, which switches the
V CORE voltage to bias the chain. This switch, along with the
NTC comparators, is controlled through the TEMPEN bit.
During charging, the NTC comparators and the switch are
turned on automatically for battery temperature monitoring,
900841
Analog Integrated Circuit Device Data
126
Freescale Semiconductor
相关PDF资料 |
PDF描述 |
|---|---|
| SC900AMLTRT | IC REG LDO ADJ .2A/.15A 20-MLPQ |
| SCCSP900842R2 | IC POWER MGT 36-WLCSP |
| SG1577ASY | IC REG CTRLR BST PWM VM 20-SOIC |
| SG1577DY | IC REG CTRLR BST PWM VM 20-DIP |
| SG3525ADW | IC REG CTRLR PWM VM 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC900844JVK | 功能描述:PMIC 解决方案 PMUIC 5SW 14LDO 10BT ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| SC900844JVKR2 | 功能描述:PMIC 解决方案 PMUIC 5SW 14LDO 10BT ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| SC900A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Programmable Penta ULDO with RESET and I2C Interface |
| SC900A100 | 制造商:Schneider Electric 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:Schneider-Telemacanique 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:SCHNEIDER ELECTRIC 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR |
| SC900A100FS | 制造商:Schneider Electric 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:Schneider-Telemacanique 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR 制造商:SCHNEIDER ELECTRIC 功能描述:SUPERPROX ULTRASONIC PROXIMITY SENSOR |
发布紧急采购，3分钟左右您将得到回复。