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 Mobile Power Management Really need to be Cautious.

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PostSubject: Mobile Power Management Really need to be Cautious.   Tue Oct 25, 2011 1:55 pm

ON Semiconductor vice chief executive of sales Lin Jianming China: the near future, sales of mobile phone handsets and adapters will become completely separate, which will pose a cellphone side of the test charge. Dell Inspiron 6000 electric

Lin Jianming: If there isn't a perfect internal overcharge proper protection circuit, the battery will overcharge causes an explosion of severe consequences.



Charging the contact interface, over-voltage is undoubtedly essentially the most dangerous. Poor quality inside adapter, failure or user error a different device adapter sometimes happens. In general, your mobile phone charge management IC can control the charge current and voltage, to keep up with the security charge the battery power. However, if the rated current in the input voltage is beyond their budget while charging, over asking for management circuit can face up to value, the circuit components are going to be adjusted because of charge-off or burned uncontrollably power and role. Any worst case, at that time period if the user in addition uses low-cost lithium energy, could not complete overcharge protection circuit, the battery will overcharge causes serious consequences of such an explosion. To this end the provisions in the phone in YD/T1591-2006 on the side to contain over-voltage protection circuit and hence avoiding such from happening. Overvoltage proper protection (OVP) circuitry detects over-voltage flaw conditions, the detection circuit shall be switch off, disconnect the iphone and the adapter outcome. DELL Latitude E6400 Electric

Power Management Products Indigenous Semiconductor Senior Application Professional Zhongjian Peng: charge management circuit functions normally charge by way of the management of single chip (Charger IC), or integrated charge-management works of power management chip (PMU) to create. Rechargeable lithium battery management circuitry to help with features for the trickle charge, constant current payment, constant voltage charging within the three charging process, and may have protection mechanisms in order to avoid overheating. Advanced charge management circuit also ought to have the input voltage over-voltage protection function. The protection of the safety for the product itself is extremely important. Some unqualified charge software circuit, often lack the protection within the design, the circuit itself may affect the system overheating, or more serious security issues. ACER TM00741 Electric

MPS Marketing Director Yuan Wenlin Tibet: a new generation associated with rechargeable IC PMU have apart from charging function through that highly integrated hardware to perform high reliability, but also really should have OVP (overvoltage protection), OCP (overcurrent protection), NTC work, both a high input voltage, small size and additionally simple external circuit. USB charger for battery management IC has to be consistent with low standby electrical power / charge current pré-réglable switching / charging method multiple input / will be able to set the input electricity charger or USB slot, and automatically charge the battery and telephone distribution work be existing; and in accordance through standard USB port belonging to the limit.

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Power Integrations抯 most important regulator device, such simply because LinkSwitch, can maintain this electrical insulation, and does not require optical isolators if you are feedback to provide specific output voltage. This can keep costs down, help design a small charger, while maintaining the specified security clearance.

The most recently released LinkSwitch-II products with exact voltage control, can possibly be very accurately simulated UNIVERSAL SERIES BUS port. In addition, merchandise include cable drop pay out, so regardless of wire above the extent of numerous current, voltage can end up kept constant. Sony VGP-BPS8 Wide variety

LinkSwitch-II 5% voltage accurate, current accuracy of 10%, for those adapter and charger is without a doubt ideal. Also, it requires 20 components to produce a complete AC potential, which saves the charge of components itself, as well as saves production time, assembling your equipment and inventory costs. "In China and tiawan, labor costs have enhanced to around 0. 003 Oughout. S. dollars each piece cost, for small patchy prevention and capacitor, in the sourcing cost of Shangzhangfuduo Gengda. " Doug Bailey with Road.

MPS full collection of battery charging chips are produced using questionable technology, have a minimum amount 20V, maximum 28V with voltage, and have been enclosed over-voltage protection and match the low standby power standards. To comply with HARDWARE OTG low standby potential requirements, a new generation of MP-2605X series will also reduce the standby existing to 40uA, and expand the reverse input voltage safeguard (-16V) function, following the MPS charge chips traditional:

MP2605 standard charge links with all chip general hand-held handheld devices; MP26056 support USB / adapter two of input interface for USB interfaces really need to charge the portable machine; MP2607 built pwr avenue, can be automatically issued to charge the battery as well as phone work current essential for high-end hand-held portable devices like smart phones, GPS the navigation, PDA applications.

"Based on customer opinions, they are using MPS involving charge chips, the good majority Yin Wei charge considerations Ercai Yong PMU and single chip charge software, but only to pick up defects line charge membership all Ke Fan Xiu back the numerous more than 20%, but cause your cost increase; but wishes be using external components for boosting the safety factor PMU, any additional cost and board spot, also makes the marketplace difficult to sustain. At that time if the use for MPS battery charging food, cost and product quality is strikes a balance. "Yuanwen Lin talked about.

TI抯 bq24070 series and bq24032A series is designed with a separate charge path and even system power path, effectively steer clear of the repeated charge and eliminate system problems, battery everyday living is greatly extended; resolve the telephone a full charge any battery consumption issues did start to extend the standby occasion 10 ~ 20%; effectively prevent the system rampant due to CPU crash along with the risk of charge, to prevent the outcome of external pressure and breakdown voltage with the issue, greatly increasing the reliability for the system; eliminates the added over-voltage protection, and avenue switching MOSFET and Schottky diode, trimming total system cost. The adapter current consumption on the system and charge redistribution regarding the automatic on-demand, using a smallish adapter, but greatly accelerated your charge time and keep your charges down while improving the customer experience. Acer Aspire 5000 power

"TI advocates the trail of dynamic power management in juice management applications has been recognized by customers, such as dual-port (USB, AIR COOLING adapter input, respectively) linear command management chip bq24032A line, single-port bq24070 Series (USB, AC adapter to express an input), "Zhang was first said.

ON Semiconductor has introduced several overvoltage protection chip. AIR COOLING adapter for wall receiving plug the NCP347/348, offer up to 2A of charge cellular telephone current and voltage transients nearly 28V fault protection; NCP360 and additionally NCP361 USB interface, to suit positive over-voltage protection controller, with extremely low 35礎 current consumption in order to reach USB standby requirements, NCP361 also provides a current limit purpose; to meet the cellular telephone charger / power supply to accessories much like the demand for bi-directional present control, ON Semiconductor as well forthcoming NCP370, provide? 28V overvoltage cover and adjustable current control.

SGM4054 as St Microelectronics state management responsible introduced the first product has now passed the test in different applications and high-volume purposes, the main features include things like: programmable charge current as much 800mA, high-capacity battery do the fast charge; temperatures calibration can prevent frequent current, constant voltage business mode, the battery overheating and reduce safety of consumer programs; by USB directly to the single battery charge, to pay the multi-product compatibility; by means of charging indicator, providing the individual identification information; 1% command precision, to ensure power supply life; low shutdown present-day of 25礎, promote the effective using of power; own 2. 93V drip charge threshold, rechargeable lithium battery is fully consistent with any standards process (trickle command, constant current charging, endless voltage charged off recognition); by means of automatic recharge feature, to grant sufficient energy. Follow-up should launch high-pressure, high loading current of charge operations chip, to meet the fresh new demand for mobile smartphone application for more electrical power. ACER AS07B72 Battery

Indigenous Semiconductor for different applications-rich impose management solution. A particular chip charge management snack (LM3658), support for UNIVERSAL SERIES BUS, AC-DC regulator of not one but two inputs, and have overheating safeguard. There are many remarkably integrated power management processor chip (PMU) has well-integrated charge-management works. Such as GPS, PMP creations PMU LP3913, the involved support for USB, AC-DC regulator of a few input and support for the charge current path organization snap. There are many applications specifically for mobile phones PMU since LP3919, more up to help 28V overvoltage protection.
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