ON Semiconductor v . p . of sales Lin Jianming China: the near future, sales of cellphones and adapters will be completely separate, that will pose a mobile phone side of the test charge.Dell Inspiron 6000 battery
Lin Jianming: When there is no perfect internal overcharge protection circuit, it will overcharge could cause an outburst of serious consequences.
Charging the device interface, over-voltage is without question probably the most dangerous. Bad quality within the adapter, failure or user error a different device adapter can happen. Generally, your phone charge management IC can control the charge current and voltage, to maintain the safety charge it. However, if the rated current with the input voltage is simply too high while charging, over charging management circuit can withstand value, the circuit components is going to be adjusted as a result of charge-off or burned out of control power and role. The worst case, at this time in the event the user also uses low-cost lithium batteries, could not complete overcharge protection circuit, the battery will overcharge might cause serious consequences of these an explosion. To this end the provisions from the phone in YD/T1591-2006 within the side to contain over-voltage protection circuit to avoid such from happening. Overvoltage protection (OVP) circuitry detects over-voltage fault conditions, the detection circuit is going to be switch off, disconnect the telephone and the adapter output.DELL Latitude E6400 Battery
Power Management Products National Semiconductor Senior Application Engineer Zhongjian Peng: charge management circuit functions normally charge from the management of single chip (Charger IC), or integrated charge-management functions of power management chip (PMU) to attain. Rechargeable lithium battery management circuitry to guide features for your trickle charge, constant current charging, constant voltage charging with the three charging process, and really should have protection mechanisms to prevent overheating. Advanced charge management circuit also should possess the input voltage over-voltage protection function. The safety with the safety of the product itself is very important. Some unqualified charge management circuit, often don’t have the protection from the design, the circuit itself may cause damage to the device overheating, or even more serious security issues.ACER TM00741 Battery
MPS Marketing Director Yuan Wenlin Asia: a fresh generation of rechargeable IC PMU have along with charging function with the highly integrated hardware to achieve high reliability, but in addition should have OVP (overvoltage protection), OCP (overcurrent protection) , NTC function, both a high input voltage, small size and straightforward external circuit. USB charger for battery management IC ought to be consistent with low standby power / charge current programmable switching / charging mode multiple input / can set the input power charger or USB port, and automatically charge the battery and mobile phone distribution work be current; plus accordance with standard USB port with the limit.
Excellent cost-effective chip Recommended
Power Integrations痴 primary regulator device, for example LinkSwitch, can keep up with the electrical insulation, and will not require optical isolators regarding feedback to provide precise output voltage. This may reduce costs, help design an inferior charger, while maintaining the necessary security clearance.
The newest LinkSwitch-II products with accurate voltage control, can be very accurately simulated USB port. Additionally, these products include cable drop compensation, so irrespective of cable across 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 good. Also, it will take 20 components to build a complete AC power, which saves the cost of components itself, but additionally saves production time, assembly and inventory costs. “In China, labor costs have raised to a number exceeding 0.003 U.S. dollars each component cost, for small patchy resistance and capacitor, inside the cost of Shangzhangfuduo Gengda.” Doug Bailey of Road.
MPS full range of battery charging chips are made using ruthless technology, use a minimum 20V, maximum 28V of voltage, and also have been integrated over-voltage protection and meet the low standby power requirements. To comply with USB OTG low standby power requirements, a brand new generation of MP-2605X series also will lessen the standby current to 40uA, and increase the opposite input voltage protection (-16V) function, pursuing the industry MPS charge chips traditionally used:
MP2605 standard charge relates to all chip general hand-held portable devices; MP26056 support USB / adapter set of input interface for USB interfaces must charge the portable device; MP2607 built pwr path, could be automatically allotted to charge it and also the phone work current needed for high-end hand-held portable devices for example mobile phones, GPS navigation, PDA applications.
“Based on customer feedback, they’re using MPS chips, most Yin Wei cost considerations Ercai Yong PMU / single chip charge management, only to locate defects line charge account all Ke Fan Xiu back the quantity of greater than 20%, but make the total cost increase; but wants to be utilising external components to improve the safety factor PMU, the additional cost and board area, also helps to make the industry challenging to sustain. At this time in the event the usage of MPS battery charging chip, cost and product quality may be strikes a balance. “Yuanwen Lin said.
TI痴 bq24070 series and bq24032A series provides a separate charge path and system power path, effectively stop the repeated charge and discharge system problems, battery is greatly extended; resolve the mobile phone an entire charge the battery consumption issues started to extend the standby time 10 ~ 20%; effectively avoid the system uncontrollable because of CPU crash as well as the likelihood of charge, to prevent the consequence of external pressure and breakdown voltage on the issue, greatly increasing the longevity of the device; eliminates the extra over-voltage protection, and path switching MOSFET and Schottky diode, reducing total system cost. The adapter current consumption within the system and charge redistribution involving the automatic on-demand, utilizing a small adapter, but greatly accelerated the charge some time and keep costs down while enhancing the user experience.Acer Aspire 5000 battery
“TI advocates the path of dynamic power management in battery power management applications may be recognized by customers, such as dual-port (USB, AC adapter input, respectively) linear charge management chip bq24032A series, single-port bq24070 Series (USB, AC adapter to talk about a port), “Zhang was said.
ON Semiconductor has introduced a series of overvoltage protection chip. AC adapter for wall charging plug the NCP347/348, can provide as much as 2A of charge cell phone current and voltage transients up to 28V fault protection; NCP360 and NCP361 USB interface, suited to positive over-voltage protection controller, with really low 35ｵA current consumption to satisfy USB standby requirements, NCP361 also offers a current limit function; to fulfill the mobile phone charger / power supply to accessories including the interest in bi-directional current control, ON Semiconductor also forthcoming NCP370, provide ｱ 28V overvoltage protection and adjustable current limit.
SGM4054 as St Microelectronics state management responsible introduced the first product has recently passed the test in a variety of applications and high-volume applications, the main features include: programmable charge current approximately 800mA, high-capacity battery can achieve the short charge; heat calibration can prevent constant current, constant voltage operation mode, battery overheating and improve the safety of consumer products; by USB straight to an individual battery charge, to fulfill the multi-product compatibility; with charging indicator, offering the user identification information; 1% charge precision, to ensure battery; low shutdown current of 25ｵA, promote the effective utilization of power; own 2.93V trickle charge threshold, rechargeable Tyso USA lithium battery may be fully in conjuction with the standards process (trickle charge, constant current charging, constant voltage charged off recognition); with automatic recharge feature, to provide sufficient energy. Follow-up will launch high-pressure, high charging current management chip, to meet the new interest in mobile phone application for more power.ACER AS07B72 Battery
National Semiconductor for several applications-rich charge management solution. A single chip charge management chip (LM3658), support for USB, AC-DC regulator of two inputs, and also have overheating protection. There are numerous highly integrated power management chip (PMU) has well-integrated charge-management functions. For example GPS, PMP designs PMU LP3913, the integrated support for USB, AC-DC regulator of two input and support of the charge current path management snap. There are numerous applications created for mobile phones PMU as LP3919, more as much as 28V overvoltage protection.