Mercury Green 320, Руководство по обслуживанию

Страница: 14 / 85

14
TYPE SIGNAL DESCRIPTION
Converter from VCC_DIMM by LDO Provided.
7 AUX2.5 Converter from AUX3V by LDO
2. Provided for CHIPSET
AUX5V
Scope:
•
This voltage is USB devices power supply for wake-up function.
• This voltage is the system’s VCC5 main power (INVERTER/HDD/CD-ROM ..) supply when system is turn on.
• This is a step-down circuit with out of phase technique.
•
The power supply converts 19.0Vdc from the AC adapter or main battery pack power source to +5Vdc.
General characteristics:
Input voltage range Load/Line regulation Ripple
Voltage
Maximum
load current
Efficiency
12 to 20Vdc +5% ~ -5% 50mV 8.0A 85%
•
Over current protection (OCP): Shutdown latch.
•
Under Voltage lockout and startup.
• Short circuit protection: Yes. Shutdown latch
• Power on/off sequencing with soft-start.
•
Turn on time: 100ms.
•
Dynamic response: The voltage keeps 5% regulation when the load changing from 10% to 90%
• Operating temperature: 5 ° C to 35 ° C.
•
Test condition and instruments:
9
Ripple & Noise: Measuring with bypass capacitors 0.1uf/10uf at output terminal and oscilloscope time-base set at
20MHz. (Tested by the oscilloscope and refer to figure 1)
9
Input voltage set at 12.0V. (DC Power supply)
9
Electronic load: Chroma 63030 or Equivalent
9
Multimeter: FLUKE 87 or Equivalent
9
All measuring refer to figure 2.
AUX3V
Scope:
• This voltage is for remove wake-up function.
•
This voltage is the system’s VCC3 main power supply when system be turn on..
•
This is a step-down circuit with out of phase technique.
• The power supply converts 19Vdc from the AC adapter or Main battery pack power source to +3.3Vdc.
General characteristics:
Input voltage range Load/Line regulation Ripple
Voltage
Maximum
load current
Efficiency