Acer TravelMate 6492 Service Guide - Page 53

Hibernate(S4) (8) Soft Off(S5) (9) Mechanical off is a condition where all power except the RTC battery has been removed from the system. 1. Initial to On state: When the AC adapter or Battery pack has been plugged into the system, the PC97551 will be reset and initial all output pins then the system goes into Initial state and waiting for power on event. If the power button is pressed then the system will go into the ON state. 2. ON to Standby state: The system will go into the Standby state when 963L receives the POS command. 3. ON to Suspend state: The system will go into Suspend state when SB460 receives the S2R command. 4. ON to Hibernate state: The system will go into Hibernate state when SB460 receives the S2D command. 5. ON to Soft Off state: The system will go into Soft Off state when SB460 receives the Soft off command. 6. Standby to ON state: The system will go into ON state when the system receives any wake up events, for example, power button, Lid switch. 7. Suspend to ON state: The system will go into ON state when the power button is pressed. 8. Hibernate to ON state: The system will go into ON state when the power button is pressed. 9. Soft Off to ON state: The system will go into ON state when the power button is pressed. Power Control Pin Description The following table is NS PC97551 power control pin description: State Initial S5_ON 0 Output Pin 3VAUXEN SUSON 0 0 MAINON 0 VRON 0 ON(S0) 1 1 Standby(S1) 1 1 Suspend(S3) 1 1 1 1 1 1 1 1 1 0 0 Hibernate(S4) 1 1 Soft Off(S5) 1 0 0 0 0 0 0 0 Battery and Charger Current Amplifier: MAX8724 Charge PWM Control: IMD2AT108 PARAMETER CONDITIONS Min Input Range Input Low Voltage Input high Voltage Charge Voltage Charge Voltage Charge Current Charge Current Charge PWM Frequency Efficiency VA M/A-, D/C-, BL/C-, REFON M/A-, D/C-, BL/C-, REFON CV-SET =0V CV-SET =5V CC-SET =0.5V (for Li -ion) CC-SET =5V (for Li-ion) VA=19V Output 12V/1.7A MIN 18 2.5 15.93 16.95 0.1 3.73 TYP 19 16.09 17.11 0.25 3.93 200 91 3-13.1. DC to DC Converter TI TPS51120 PWM chip: 5V & 3.3V &15V PARAMETER 5V 3.3V CONDITIONS Current 0-3A Current 0-3A MIN TYP MAX UNITS 4.8 5.0 5.2 V 3.14 3.35 3.76 V MAX 20 0.8 5.5 16.25 17.27 0.4 4.13 UNITS V V V V V A A KHz % Chapter 1 43