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Cellphone Power Supervision Should be Mindful

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ON Semiconductor vice president of income Lin Jianming China: the close to future, income of cell phones and adapters will be fully different, which will pose a android tablets side of the exam cost.Dell Inspiron 6000 battery

Lin Jianming: If there is no best inside overcharge defense circuit, the battery will overcharge may possibly cause an explosion of severe effects.

Charging the phone interface, more than-voltage is unquestionably the most hazardous. Bad top quality in the adapter, failure or consumer error then a various device adapter can come about. In basic, your mobile phone cost administration IC can handle the cost recent and voltage, to preserve the stability charge the battery. However, if the rated recent of the input voltage is way too high although charging, over charging administration circuit can withstand price, the circuit components will be modified since of cost-off or burned out of management electrical power and role. The worst circumstance, at this time if the person also uses low-cost lithium batteries, could not full overcharge security circuit, the battery will overcharge may possibly cause serious implications of this sort of an explosion. To this end the provisions of the phone in YD/T1591-2006 in the facet to have more than-voltage safety circuit to prevent these kinds of from occurring. Overvoltage security (OVP) circuitry detects above-voltage fault ailments, the detection circuit will be change off, disconnect the mobile phone and the adapter output.DELL Latitude E6400 Battery

Strength Management Items Nationwide Semiconductor Senior Software Engineer Zhongjian Peng: cost administration circuit features normally cost by the management of single chip (Charger IC), or built-in cost-management capabilities of electrical power administration chip (PMU) to achieve. Rechargeable lithium battery administration circuitry to assist characteristics for the trickle cost, constant present charging, continuous voltage charging of the three charging procedure, and should have safety mechanisms to avert overheating. Advanced cost administration circuit also must have the input voltage over-voltage security perform. The protection of the security of the item itself is really critical. Some unqualified cost management circuit, frequently absence the security of the design and style, the circuit itself might cause damage to the program overheating, or even a lot more significant security issues.ACER TM00741 Battery

MPS Marketing Director Yuan Wenlin Asia: a new generation of rechargeable IC PMU have in addition to charging function by way of the very built-in hardware to obtain higher dependability, but also should have OVP (overvoltage protection), OCP (overcurrent security) , NTC perform, equally a higher input voltage, little size and basic external circuit. USB charger for battery management IC need to be constant with reduced standby power / charge recent programmable switching / charging manner multiple input / can established the input strength charger or USB port, and automatically cost the battery and cell cellphone distribution operate be present and in accordance with standard USB port of the limit.

Superb price-efficient chip Advised

Power Integrations major regulator product, this sort of as LinkSwitch, can keep the electrical insulation, and does not call for optical isolators in the case of comments to supply specific output voltage. This can reduce charges, assist layout a smaller charger, although keeping the needed protection clearance.

The latest LinkSwitch-II goods with correct voltage manage, can be extremely accurately simulated USB port. In addition, the products include cable decline payment, so no matter of cable over the extent of the reduction of present, voltage can be kept continual.Sony VGP-BPS8 Battery

LinkSwitch-II 5% voltage precision, existing accuracy of 10%, for the adapter and charger is excellent. Also, it requires 20 parts to create a complete Air conditioning power, which saves the charge of elements alone, but also saves generation time, assembly and inventory costs. "In China, labor expenses have increased to around .003 U.S. pounds each element price, for tiny patchy resistance and capacitor, in the expense of Shangzhangfuduo Gengda." Doug Bailey of Road.

MPS complete assortment of battery charging chips are developed making use of large pressure engineering, have a least 20V, highest 28V of voltage, and have been built-in more than-voltage protection and fulfill the minimal standby energy demands. To comply with USB OTG minimal standby power demands, a new era of MP-2605X sequence also will minimize the standby existing to 40uA, and enhance the reverse input voltage protection (-16V) perform, subsequent the industry MPS charge chips broadly employed:

MP2605 regular cost applies to all chip basic hand-held portable gadgets MP26056 support USB / adapter pair of input interface for USB interfaces need to have to cost the transportable unit MP2607 developed pwr route, can be routinely assigned to cost the battery and the telephone operate current required for large-conclude hand-held portable products such as great iphone accessories , GPS navigation, PDA programs.

"Based on client feedback, they are making use of MPS of cost chips, the excellent greater part Yin Wei expense considerations Ercai Yong PMU / one chip cost management, but only to find defects line cost account all Ke Supporter Xiu again the number of more than twenty%, but result in the overall cost enhance but wishes to be utilizing external components to greatly enhance the basic safety issue PMU, the further charge and board location, also helps make the sector difficult to maintain. At this level if the use of MPS battery charging chip, charge and solution good quality can be strikes a harmony. "Yuanwen Lin said.

TI bq24070 collection and bq24032A series provides a different cost path and technique electrical power route, effectively avert the recurring cost and discharge program problems, battery lifestyle is significantly extended solve the cell telephone a entire charge the battery intake concerns started to extend the standby time ten ~ 20% effectively stop the method out of manage because of to CPU crash and the chance of cost, to stop the outcome of exterior strain and breakdown voltage above the issue, significantly increasing the reliability of the program gets rid of the further over-voltage protection, and path switching MOSFET and Schottky diode, reducing total technique expense. The adapter recent usage in the technique and cost redistribution amongst the automatic on-demand, employing a little adapter, but drastically accelerated the cost time and decrease costs even though enhancing the user knowledge.Acer Aspire 5000 battery

"TI advocates the path of energetic power management in battery strength administration applications has been identified by buyers, such as double-port (USB, Ac adapter input, respectively) linear cost administration chip bq24032A collection, single-port bq24070 Series (USB, Air conditioning unit adapter to share an input), "Zhang was stated.

ON Semiconductor has released a series of overvoltage defense chip. Air conditioner adapter for wall charging plug the NCP347/348, can supply up to 2A of cost cell phone existing and voltage transients up to 28V fault defense NCP360 and NCP361 USB interface, suited for positive in excess of-voltage safety controller, with quite low 35 existing intake to fulfill USB standby needs, NCP361 also has a current limit perform to meet up with the cell phone charger / power supply to components these kinds of as the desire for bi-directional present manage, ON Semiconductor also forthcoming NCP370, offer ?28V overvoltage safety and adjustable existing limit.

SGM4054 as St Microelectronics condition administration in charge launched the 1st product has now passed the examination in a assortment of applications and substantial-volume purposes, the primary functions incorporate: programmable charge current up to 800mA, substantial-capacity battery can achieve the quickly charge warmth calibration can stop continual existing, constant voltage operation method, the battery overheating and boost the basic safety of client products by USB immediately to a one battery cost, to fulfill the multi-item compatibility with charging indicator, providing the person identification data 1% cost accuracy, to ensure battery daily life very low shutdown existing of twenty five, advertise the productive utilization of energy personal 2.93V trickle charge threshold, rechargeable lithium battery can be totally steady with the specifications method (trickle cost, constant present charging, constant voltage billed off recognition) with automated recharge characteristic, to give enough vitality. Stick to-up will start substantial-strain, high charging current of cost administration chip, to meet the new desire for mobile mobile phone application for a lot more power.ACER AS07B72 Battery

Nationwide Semiconductor for distinct programs-loaded cost management resolution. A one chip charge management chip (LM3658), support for USB, Air conditioner-DC regulator of two inputs, and have overheating security. There are a lot of highly integrated electrical power administration chip (PMU) has well-integrated cost-administration functions. This kind of as GPS, tablets accessories designs PMU LP3913, the built-in help for USB, Air conditioning unit-DC regulator of two input and help of the cost existing route administration snap. There are many programs created for cell telephones PMU as LP3919, far more up to 28V overvoltage defense.

Posted Oct 21, 2012 at 8:11am