ON Semiconductor vice us president of sales Lin Jianming Chinese suppliers: the near future, sales of mobile phones and adapters will be completely separate, which will pose a mobile side of the evaluation charge. Dell Inspiron 6000 battery
Lin Jianming: If you cannot find any perfect internal overcharge security circuit, the battery will overcharge may cause an explosion of really serious consequences.
Charging the cellular phone interface, over-voltage is undoubtedly the best dangerous. Poor quality while in the adapter, failure or user error then a different device adapter can occur. In general, your cellphone charge management IC might control the charge latest and voltage, to take care of the security charge the battery. However, if the rated current of your input voltage is too high while charging, over loading management circuit can tolerate value, the circuit components might be adjusted because of charge-off or burned out of control power and role. The worst case, at this time if the user additionally uses low-cost lithium electrical power, could not complete overcharge safeguards circuit, the battery will overcharge may cause serious consequences of this explosion. To this end the provisions of your phone in YD/T1591-2006 in the side to contain over-voltage protection circuit to counteract such from happening. Overvoltage protection (OVP) circuitry detects over-voltage fault conditions, the detection circuit will be switch off, disconnect the phone and the adapter productivity. DELL Latitude E6400 Battery
Power Management Products Nation's Semiconductor Senior Application Engineer Zhongjian Peng: charge management circuit functions normally charge by the management of single processor chip (Charger IC), or integrated charge-management operates of power management chip (PMU) to achieve. Rechargeable lithium battery management circuitry to support features for the trickle charge, constant current charging, constant voltage charging of the three charging process, and should have protection mechanisms to circumvent overheating. Advanced charge management circuit also should have the input voltage over-voltage security function. The protection of the safety of the product itself is very important. Some unqualified charge management circuit, often lack the protection of the design, the circuit itself may cause damage to the system overheating, or even more serious security issues. ACER TM00741 Battery
MPS Marketing Director Yuan Wenlin Asia: a new generation with rechargeable IC PMU have in addition to charging function through the highly integrated hardware to obtain high reliability, but also will need to have OVP (overvoltage protection), OCP (overcurrent protection), NTC function, both a high knowledge voltage, small size and simple external circuit. USB charger for battery management IC should be consistent with low standby energy / charge current programmable switching / charging option multiple input / can certainly set the input electrical power charger or USB town, and automatically charge the battery and cell phone distribution work be up-to-date; and in accordance with standard USB port of the limit.
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Power Integrations抯 most important regulator device, such as LinkSwitch, can maintain this electrical insulation, and does not require optical isolators in the case of feedback to provide proper output voltage. This can keep costs down, help design a lesser charger, while maintaining the necessary security clearance.
The latest LinkSwitch-II products with exact voltage control, can possibly be very accurately simulated USB port. In addition, the products include cable drop pay, so regardless of wire above the extent of the loss of current, voltage can be kept constant. Sony VGP-BPS8 Battery
LinkSwitch-II 5% voltage accuracy, current accuracy of 10%, for the adapter and charger is ideal. Also, it requires 20 components to produce a complete AC energy, which saves the charge of components itself, but also saves production time, assembly and inventory costs. "In China, labor costs have enhanced to around 0. 003 U. S. dollars each component cost, for small patchy resistance and capacitor, in the cost of Shangzhangfuduo Gengda. " Doug Bailey with Road.
MPS full range of battery charging chips are produced using questionable technology, have a the bare minimum 20V, maximum 28V with voltage, and have been integrated over-voltage protection and meet the low standby power desires. To comply with UNIVERSAL SERIAL BUS OTG low standby power requirements, a new generation of MP-2605X series will also reduce the standby up-to-date to 40uA, and increase the reverse input voltage safeguards (-16V) function, following the MPS charge chips widely used:
MP2605 standard charge applies to all chip general hand-held portable devices; MP26056 support USB / adapter pair of input interface for USB interfaces really need to charge the portable machine; MP2607 built pwr avenue, can be automatically allocated to charge the battery as well as phone work current required for high-end hand-held portable devices like smart phones, GPS navigation, PDA applications.
"Based on customer feedback, they are using MPS involving charge chips, the good majority Yin Wei charge considerations Ercai Yong PMU or single chip charge relief, but only to have defects line charge profile all Ke Fan Xiu back the number of more than 20%, but cause the overall cost increase; but wants to be using external components for boosting the safety factor PMU, the additional cost and board vicinity, also makes the field difficult to sustain. At this point if the use involving MPS battery charging snack, cost and product quality can be strikes a balance. "Yuanwen Lin said.
TI抯 bq24070 series and bq24032A series provides a separate charge path plus system power path, effectively prevent the repeated charge and eliminate system problems, battery everyday living is greatly extended; resolve the cell phone a full charge your battery consumption issues began to extend the standby point in time 10 ~ 20%; effectively prevent the system out of control due to CPU crash as well as risk of charge, to prevent the result of external pressure and breakdown voltage over the issue, greatly increasing the reliability of the system; eliminates the added over-voltage protection, and avenue switching MOSFET and Schottky diode, reducing total system cost. The adapter current consumption in the system and charge redistribution regarding the automatic on-demand, using a smallish adapter, but greatly accelerated your charge time and reduce costs while improving the customer experience. Acer Aspire 5000 power
"TI advocates the path of dynamic power management in juice management applications has been recognized by customers, such as dual-port (USB, AC adapter input, respectively) linear charge management chip bq24032A line, single-port bq24070 Series (USB, AC adapter to share an input), "Zhang was said.
ON Semiconductor has introduced a series of overvoltage protection chip. AC adapter for wall receiving plug the NCP347/348, can provide up to 2A of charge mobile phone current and voltage transients nearly 28V fault protection; NCP360 and NCP361 USB interface, suitable for positive over-voltage protection controller, with very low 35礎 current consumption in order to reach USB standby requirements, NCP361 also has a current limit purpose; to meet the cellular telephone charger / power supply to accessories such as the demand for bi-directional active control, ON Semiconductor as well forthcoming NCP370, provide? 28V overvoltage protection and adjustable current minimize.
SGM4054 as St Microelectronics state management responsible introduced the first product has now passed the test in a variety of applications and high-volume job applications, the main features involve: programmable charge current up to 800mA, high-capacity battery can achieve the fast charge; heat calibration can prevent frequent current, constant voltage business mode, the battery overheating and improve the safety of consumer products and solutions; by USB directly to the single battery charge, to meet the multi-product compatibility; with charging indicator, providing the user identification information; 1% charge precision, to ensure power supply life; low shutdown present-day of 25礎, promote the effective utilization of power; own 2. 93V trickle charge threshold, rechargeable lithium battery can be fully consistent with your standards process (trickle request, constant current charging, constant voltage charged off recognition); with automatic recharge feature, to provide sufficient energy. Follow-up will launch high-pressure, high loading current of charge operations chip, to meet the new demand for mobile telephone application for more power. ACER AS07B72 Battery
National Semiconductor for different applications-rich impose management solution. A single chip charge management chip (LM3658), support for USB, AC-DC regulator of not one but two inputs, and have overheating safeguard. There are many remarkably integrated power management nick (PMU) has well-integrated charge-management tasks. Such as GPS, PMP designs PMU LP3913, the involved support for USB, AC-DC regulator of two input and support of the charge current path administration snap. There are many applications designed for mobile phones PMU simply because LP3919, more up to help 28V overvoltage protection.
