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OPERATING PRINCIPLES OF LAPTOPS POWER SUPPLY
1. The source voltage of the Laptop.
- Each Laptop line about 10 different types of voltage, they have different names, so the name of the road is an integrated voltage between the power lines and the number of machines in each line, so we have dozens, even hundreds of so-called for the line voltage, which makes any person would feel a headache and hard to remember. Skip it hard to remember names in a laptop computer usually has the following voltages:
Input voltages from 16 to 20V (the focus point between the source and the source DC IN PIN)3.3V standby voltage (the voltage level for the source driver IC)5V voltage level before (there before pressing the Power switch for charge control circuit)3.3V voltage levels before (there before pressing the Power switch for charge control circuit)Secondary voltage of 5V (for the drives, chipset male, USB, LCD screen ...)Secondary voltage 3.3V (for male chipset, BIOS, SIO, Clock gene, PCI, Sound, Network ..)2,5V voltage for DDRVoltage 1.8V for DDR2 Chip Video and1.5V voltage levels for two chipsets.Auxiliary power supply voltage for DDR 1,25V1.2 V auxiliary power supply voltage for two ChipsetVIO voltage range auxiliary power supply for the CPU 1,05V.0,9V voltage auxiliary power supply for DDR2Electrical main power supply for the CPU apVCORE
In one series, the voltage across various known:
- For example, the IBM T42 input voltage named VINT16 and 5V voltage level before named VCC5M, secondary voltage 5V named VCC5VB
in the different models, the names are different:
- for example, the input voltage of an IBM T42 but called VINT16 input voltage of ASUS machine called AC_BAT_SYS or 5V voltage level before IBM T42 VCC5M but called on the 5V voltage ASUS called 5VSUS granted before ...
If there are 10 lines and each line Laptop approximately 10 voltage is the voltage lines have different names up to hundreds of lines . => It is horrible, hard to remember too !!!
However the voltage on the line they have common characteristics, so that is easy to remember, it is based on common characteristics we divide into 5 groups voltage on power applied as follows:
Input voltage (input source)Standby voltage (Standby Power)Previous level voltage (Supply ago)Secondary voltage (secondary source)VCore voltage (Source vCore)
Features of the voltage across the group are:
5 groups of voltage on time appears different from the ascending order are: input voltage (1) => Voltage wait (2) => voltage level before (3) => Secondary Voltage ( 4) => voltage vCore (5)The voltage in the same group, it appears equal time.The voltage across the group appeared on the nature bridged, ie before the new voltage following voltage, please note this because it makes it easy to localize the cause of the disease amnesty.2. Features of the group voltage (voltage source) on Laptop.
1. Input voltage (input source)Input voltages from 12 to 20V (the focus point between the source and the source DC IN PIN).Power is the first to appear on the computer when we add battery or adapter plug.On the laptop, go to the source of input clock source to supply voltage for operating the pulse source, besides the input source directly only for high-pressure block (inverter) to illuminate the screen voltage.When the input source is still not eating or eating stream flow is negligible.

2. The voltage standby (Standby Power).
5V standby voltage (3V or 5V and) is the first low-voltage source on the machine to give some low voltage circuits needed to run before the operating clock source.Standby voltage usually comes out from the foot of the IC Always_On All oscillators generate 5V and 3V voltage level, arm usually have the name of VL, or LDO or VREG3 and VREG5.Standby voltage can be used to power the chip SIO (source driver IC) or open source command level for 5V, 3V and advances granted prior to Vcc pins (5V) power supply IC oscillator before.If the machine does not have the input source, there is no waiting and without power source, there is no standby power sources behind.Wait a source machine, the machine is still not eating or eating stream flow is negligible.

3. The voltage applied before (Feed ago)
5V and 3V voltage level before the first low-voltage pulse generated by the source but to provide charge control circuit and a secondary source of 5V, 3V later.Source 5V, 3V operation before you press the switch before open source (if the computer uses power adapter), otherwise just run Battery Adapter plug it running after you press the switch.Feed advance depends on the input source and standby power, without this second supply voltage before and no.The machine does not turn on the lights (or no secondary source) is usually caused by a loss of supply before 5V, 3V.When the power on before, conventional current flow consumes about 0.01 to 0,03A
4. Secondary Voltage (secondary sources).

Secondary sources are all the voltage appears after you press the switch to return the computer to prepare the operating mode, they include the following voltages.Secondary voltage of 5V (for the drive, the USB port, LCD, power IC sound)Secondary voltage 3.3V (for male chipset, BIOS, SIO, Clock Gen, Mini PCI slot, Sound, Network ..) and for light sources.2,5V voltage (if any), the main power supply for DDR1Chip Voltage 1.8V for DDR2 Video and main source for1.5V voltage levels for two chipsets.Voltage 1,25V (if applicable) auxiliary power supply for DDR11.2 V auxiliary power supply voltage for two ChipsetVIO voltage auxiliary power supply for about 1,05V for both the CPU and the chipset.0,9V voltage auxiliary power supply for DDR2Secondary sources are only active when 5V source was granted before the machine works fine (because this voltage level Vcc pins of the IC to oscillate secondary sources)
5. Voltage vCore (Source vCore)Electrical apVCORE main power supply for the CPU.Source vCore final appearance, and it depends on the 5V and 3V voltage secondary. (Because the power supply voltage Vcc pins of the IC to oscillate vCore source)
* The statistics some voltage source on some laptop models commonly used.

IBM T40, T41, T42
Input Source:
VINT16
(VINT20) Standby Power: ALWAYS_ON Out VL leg of 5V and 3V IC oscillator sources before: VCC5M VCC3M secondary Source: VCC5B VCC3B VCC2R5A VCC2R5B VCC1R5B VCC1R25B VCCCPUIO VCCVIDEOCORE vCore Source: VCCCPUCORE DELL D600 input Source: PWR_SRC wait Source: ALWAYS_ON Out LDO leg of 5V and 3V IC oscillator secondary Source: + 5VSUS + 3VSUS secondary sources Range: + 2_5VSUS SMDDR (1,25V) VGACORE + 1,5VSUS + 1,05V_VCCP + 1,8VRUN VTT (1,05V) VCC1_2_MCH (1.2 V) Vcore Source: + VHCORE DELL D630 Power input: + DC1_PWR_SRC standby Power : ALWAYS_ON sources before + 5V_ALWP + 3V3_ALWP secondary sources + 1.05V_VCCP_P + 1.5V_RUN_P + 1.8V_SUSP + 1.25V_RUNP CPU Source: + VCC_CORE HP DV6000 Power input: VIN Source standby ALWAYS_ON leg Out ??LDO of 5V and oscillator IC 3V Supply before: 5VPCU 3VPCU secondary Source: 1.8VSUS + 1.5V + 1.05V VGACORE CPU threshold: VCC_CORE HP DV2000 input Source: DCBATOUT Source standby ALWAYS_ON Out LDO leg of 5V and 3V IC oscillator sources before: 5V_S3 3V_PWR Source level informal 1D05_S0 1D8V_PWR 1D5V_S0 VGA_CORE_PWR CPU resources VCC_CORE_S0 ASUS T76S input Source: AC_BAT_SYS threshold: ALWAYS_ON Out VREG5 and VREG3 leg of 5V and 3V IC oscillator sources before: + 3VSUS + 5VSUS Source level a + 1.8V + 3V + 5V + 0.9VS + 1.5VS + 1.25VS + 2.5VS + 3VS Source CPU + vCore ACER Power input: DCBATOUT wait Source: ALWAYS_ON Out VREG5 and VREG3 leg of 5V and 3V IC oscillator sources before: 5V_PWR 3V_PWR secondary Source: 5V_S0 5V_S5 1D8V_PWR 1D5V_S0 1D05V_PWR VGFXCORE CPU Source: VCC_CORE SONY M780L inputs: DCBATOUT Feed advance: + 3VALW + 5VALW secondary Source: + 1_5VRUN + 1_8VSUS + 1_05VRUN CPU Source: VHCORE