Cellphone Power Management Needs to be Cautious.

ON Semiconductor vice chief executive of sales Lin Jianming Cina: the near future, sales of phones and adapters will often be completely separate, which will pose a cellphone side of the test out charge. Dell Inspiron 6000 solar battery

Lin Jianming: If there isn't a perfect internal overcharge safeguards circuit, the battery will overcharge produces an explosion of truly serious consequences.



Charging the contact interface, over-voltage is undoubtedly essentially the most dangerous. Poor quality inside adapter, failure or user error then the different device adapter sometimes happens. In general, your mobile phone charge management IC can easily control the charge up-to-date and voltage, to keep up with the security charge the power. However, if the rated current in the input voltage is excessive while charging, over asking for management circuit can hold up against value, the circuit components are going to be adjusted because of charge-off or burned unable to cope power and role. That worst case, at this time around if the user moreover uses low-cost lithium battery packs, could not complete overcharge defense circuit, the battery will overcharge produces serious consequences of such an explosion. To this end the provisions in the phone in YD/T1591-2006 within the side to contain over-voltage protection circuit and hence avoiding such from happening. Overvoltage coverage (OVP) circuitry detects over-voltage problem conditions, the detection circuit can be switch off, disconnect the item and the adapter expenditure. DELL Latitude E6400 Solar battery

Power Management Products Indigenous Semiconductor Senior Application Industrial engineer Zhongjian Peng: charge management circuit functions normally charge via the management of single chips (Charger IC), or integrated charge-management works of power management chip (PMU) to get. Rechargeable lithium battery management circuitry compliment features for the drip charge, constant current getting, constant voltage charging belonging to the three charging process, and may have protection mechanisms in order to avoid overheating. Advanced charge management circuit also need to have the input voltage over-voltage coverage function. The protection of the safety from the product itself is really important. Some unqualified charge administration circuit, often lack the protection belonging to the design, the circuit itself may affect the system overheating, or over serious security issues. ACER TM00741 Solar battery

MPS Marketing Director Yuan Wenlin Asian countries: a new generation from rechargeable IC PMU have and also charging function through this highly integrated hardware to perform high reliability, but also really should have OVP (overvoltage protection), OCP (overcurrent protection), NTC do the job, both a high feedback voltage, small size as well as simple external circuit. USB charger for battery management IC should really be consistent with low standby potential / charge current programmable switching / charging option multiple input / could set the input capability charger or USB interface, and automatically charge the battery and phone distribution work be recent; and in accordance by using standard USB port from the limit.

Excellent cost-effective computer chip Recommended

Power Integrations抯 principal regulator device, such because LinkSwitch, can maintain all the electrical insulation, and does not require optical isolators in that instance feedback to provide correct output voltage. This can reduce costs, help design a more compact charger, while maintaining the data that is security clearance.

The most recent LinkSwitch-II products with genuine voltage control, can come to be very accurately simulated UNIVERSAL SERIAL BUS port. In addition, items include cable drop settlement, so regardless of cord above the extent of have an effect on current, voltage can end up being kept constant. Sony VGP-BPS8 Solar battery

LinkSwitch-II 5% voltage dependability, current accuracy of 10%, in the adapter and charger is actually ideal. Also, it requires 20 components to develop a complete AC potential, which saves the fee of components itself, but probably saves production time, putting together and inventory costs. "In Japan, labor costs have heightened to around 0. 003 You. S. dollars each element cost, for small patchy opposition and capacitor, in the fee for Shangzhangfuduo Gengda. " Doug Bailey involving Road.

MPS full choice of battery charging chips are produced using ruthless technology, have a bare minimum 20V, maximum 28V involving voltage, and have been involved over-voltage protection and meet the low standby power prerequisites. To comply with USB OTG low standby electricity requirements, a new generation of MP-2605X series also will reduce the standby recent to 40uA, and improve the overall reverse input voltage defense (-16V) function, following the industry MPS charge chips popular:

MP2605 standard charge is true for all chip general hand-held mobile devices; MP26056 support USB / adapter set of two input interface for USB interfaces should charge the portable piece of equipment; MP2607 built pwr course, can be automatically sent to to charge the battery plus the phone work current required for high-end hand-held portable devices that include smart phones, GPS routing, PDA applications.

"Based on comments from customers, they are using MPS with charge chips, the awesome majority Yin Wei fee considerations Ercai Yong PMU and single chip charge managing, but only to become defects line charge bank account all Ke Fan Xiu back may be more than 20%, but cause in overall cost increase; but would like be using external components to further improve the safety factor PMU, the excess cost and board location, also makes the market difficult to sustain. At that point if the use in MPS battery charging chips, cost and product quality will be strikes a balance. "Yuanwen Lin proclaimed.

TI抯 bq24070 series and bq24032A series provides for a separate charge path not to mention system power path, effectively stop the repeated charge and being let go system problems, battery lifestyle is greatly extended; resolve the phone a full charge that battery consumption issues began to extend the standby instance 10 ~ 20%; effectively prevent the system unable to cope due to CPU crash as well as the risk of charge, to prevent the results of external pressure and breakdown voltage within the issue, greatly increasing the reliability belonging to the system; eliminates the increased over-voltage protection, and course switching MOSFET and Schottky diode, bringing down total system cost. The adapter current consumption with the system and charge redistribution relating to the automatic on-demand, using a smaller adapter, but greatly accelerated a charge time and keep your charges down while improving the buyer experience. Acer Aspire 5000 battery pack

"TI advocates the avenue of dynamic power management in electric batteries management applications has been identified by customers, such as dual-port (USB, AIR-CON adapter input, respectively) linear price management chip bq24032A selection, single-port bq24070 Series (USB, AC adapter to share with you an input), "Zhang is said.

ON Semiconductor has introduced a few overvoltage protection chip. AIR-CON adapter for wall payment plug the NCP347/348, can assist with up to 2A of charge cell phone current and voltage transients as much 28V fault protection; NCP360 and even NCP361 USB interface, worthy of positive over-voltage protection controller, with lower 35礎 current consumption in order to meet USB standby requirements, NCP361 in addition has a current limit performance; to meet the telephone charger / power supply to accessories just like the demand for bi-directional present-day control, ON Semiconductor in addition forthcoming NCP370, provide? 28V overvoltage coverage and adjustable current reduce.

SGM4054 as St Microelectronics state management in control introduced the first product has passed the test in numerous applications and high-volume job applications, the main features contain: programmable charge current close to 800mA, high-capacity battery can do the fast charge; warm up calibration can prevent endless current, constant voltage function mode, the battery overheating and help safety of consumer services; by USB directly to your single battery charge, to get to know the multi-product compatibility; through charging indicator, providing the operator identification information; 1% price precision, to ensure wide variety life; low shutdown latest of 25礎, promote the effective consumption of power; own 2. 93V drip charge threshold, rechargeable lithium battery will be fully consistent with that standards process (trickle impose, constant current charging, prolonged voltage charged off recognition); through automatic recharge feature, to make sufficient energy. Follow-up might launch high-pressure, high asking for current of charge control chip, to meet the brand new demand for mobile smartphone application for more electric power. ACER AS07B72 Battery

State Semiconductor for different applications-rich command management solution. A solitary chip charge management processor (LM3658), support for USB, AC-DC regulator of a pair of inputs, and have overheating cover. There are many really integrated power management snack (PMU) has well-integrated charge-management operates. Such as GPS, PMP design PMU LP3913, the included support for USB, AC-DC regulator of 2 input and support belonging to the charge current path organization snap. There are many applications created for mobile phones PMU seeing that LP3919, more up to make sure you 28V overvoltage protection.