JHL90 Service Manual
3. DC-DC CONVERTER
3.1 Description
upply the power for JHL90 series notebook
VALWP, +3VALWP, +1.8VP, +1.5VP,
+1.05VSP, +0.9VSP, +VGA_COREP, VG logical
CPU_CORE for CPU and supplies for the built-in KB926 microprocessor which
handles the keyboard and PMU control functions of the system.
ON/OFF is controlled by KB926. There is o a built-in charger power source. It
can pack her the computer is ON or OFF.
3.2 Fe
• High efficiency, up to 85% (using battery)
• Accept wide range DC input voltage from 8V to 19V
• Built-in charger power source
• The power ON/OFF is controlled by software
3.3 Electrical specification
Input Voltage/Current
• 8V to19V at the summing point of AC-DC and battery
• INPUT Current 10.8A max from 9-cell battery
• INPUT Current 9.6A max from 6-cell battery
• 4.74A max from 90W AC-DC Adapter.
3.4 Temperature Range:
• Operating temperature: 0°C to 40°C
• storage temperature range: - 20°C to 65°C DC/DC OUTPUT
• Fixed output voltage/Current
Item +5VALWP +CPU_CORE +VGA_COREP
Nominal voltage +5V depend on VID depend on VID
Min. current 0A 0A 0A
Max. current 4.9A 36A 16A
Peak current 7A 44A 22.8A
The DC-DC converter is designed to s
computer of Compal. It supply +5
A_1.8VSP for system, +
The power
als
charge battery whet
atures
4-3
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