- 您现在的位置：买卖IC网 > PDF目录69042 > PC34708VMR2 (FREESCALE SEMICONDUCTOR INC) 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA206 PDF资料下载
参数资料
| 型号： | PC34708VMR2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA206 |
| 封装： | 13 X 13 MM, 0.80 MM PITCH, LEAD FREE, MO-275HHAC-1, MAPBGA-206 |
| 文件页数： | 139/200页 |
| 文件大小： | 5160K |
| 代理商： | PC34708VMR2 |
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页当前第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页第193页第194页第195页第196页第197页第198页第199页第200页
Analog Integrated Circuit Device Data
Freescale Semiconductor
43
PC34708
Functional Block Requirements and Behaviors
Battery Management Block Description and Application Information
battery will be connected to BP. The buck charger will take control of the charging the battery in constant current mode via the
CHRCC[3:0] bits, which will default to 550 mA. If the aux input current limit does obtain the 500 mA limit, then the system will stay
off and the battery will continue to trickle charge until the battery has recovered to the 3.4 V threshold, and then the PMIC will
power on.
With MBATT replaced by a short (GBAT grounded), the battery, and therefore BP, is below the LOWBATT[1:0] threshold, this will
be detected and the internal trickle path will be used to precharge the battery. The input current limit is set to 100 mA, when the
VAUX voltage transitions above the VAUXTH threshold and the trickle cycle is started, the trickle current resuscitation current is
set to 12 mA (resuscitation), until the battery voltage reaches 1.5 V. When the battery is between 1.5 V and VBAT_TRKL, the
trickle1 current is set to 70 mA. When the battery voltage reaches the VBAT_TRKL threshold, the trickle current will be increased
to the ITRICKLE2 current. If VAUX drops below the VAUXWEAK threshold, the trickle charger will decrease to the trickle1 setpoint.
The battery will charge to the LOWBATT threshold and the application will turn on.
The Precharge timer is set by the PRETMR pin, as shown in Table 37. The precharge will timeout and stop charging. If it did not
succeed in raising the battery to the LOWBATT[1:0] threshold, the interrupt CHRTIMEEXP will be generated. The precharge
timer applies to the total time it takes the battery to recover from the dead battery condition (caused by a resuscitation to trickle1
to trickle2).
The charging circuit will stop charging and generate an interrupt once the battery is fully charged. Clearing the CHRCMPLT
interrupt will immediately start a new charge cycle. To prevent this from immediately starting a new charge cycle, the charger
should be disabled by setting the CHREN = 0. If the CHRCMPLT interrupt is left asserted and the battery discharges below the
95.4% of the CHRGCV threshold, the charger will restart. To turn the charger buck off, the CHREN bit must be cleared. The
charge complete is detected by the charge current dropping below the charge current termination threshold CHRITERM[2:0].
The PC34708 uses the coulomb counter to determine the end of charge.
The hardware end of charge termination is enabled by the CHRITERMEN set to a 1. The hardware end of charge termination
can be disabled by setting the CHRITERMEN to a 0. With CHRITERMEN set to 0, it is up to the software to determine the end
of charge. The buck charger can be enabled or disabled at the end of charge by setting the SPI bit EOC_BUCK_EN. With
EOC_BUCK_EN =1, when the battery reaches end of charge, the buck will be enabled. With EOC_BUCK_EN =0, the buck will
be disabled when the battery reaches end of charge. Additional flexibility allows the battery to be connected or disconnected
where the MBATT FET is present. This allows the charger to be disconnected from the battery, to prevent the battery from float
charging (overcharging). When BATT_ISO_EN is set to a one, it takes priority over the EOC_BUCK_EN bit. With
BATT_IOS_EN =1, the MBATT FET is opened when the charger detects an end of charge completion. The system will be powered
via the buck charger, regardless the state of EOC_BUCK_EN. To close the MBATT FET during an end of charge, the
BATT_ISO_EN should be set to a 0.
Table 37. Precharge Timer Settings
PRETMR pin
Trickle Precharge Timer (Hrs)
Ground
4.5
VCOREDIG
5.5
Floating
6.5
Table 38. End of Charge Operating Mode
BAT_ISO_EN EOC_BUCK_EN
Operating Mode
0(default)
0 (default)
Buck off in charge complete. If
MBATT detected it will be closed
0
1
Buck on in charge complete. If
MBATT detected it will be closed
1
0
Buck on in charge complete. If
MBATT detected it will be opened
1
Buck on in charge complete. If
MBATT detected it will be opened
相关PDF资料 |
PDF描述 |
|---|---|
| PC34708VM | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA206 |
| PC34708VK | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA206 |
| PCF1252-6T | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| PCF1252-8T-T | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| PCF1252-4T-T | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PC34709VK | 制造商:Freescale Semiconductor 功能描述:PMIC 5SW,6 LDO,BST - Bulk |
| PC34709VKR2 | 制造商:Freescale Semiconductor 功能描述:PMIC 5SW,6 LDO,BST - Tape and Reel |
| PC34710EW | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Adjustable Dual Output Switching Power Supply |
| PC34710EWR2 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Adjustable Dual Output Switching Power Supply |
| PC3-48-12 | 功能描述:DC/DC转换器 3W 12V 0.25A RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
发布紧急采购，3分钟左右您将得到回复。