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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
< Fig 4. SM-Power Circuit Diagram of KS660 >
< Fig 5. SM-Power Circuit Diagram with charging part >
‘
3.3.2. S-Gold Radio Part
3.3.2.1. General Description
S-GOLDradio integrates a Power Management Unit for Lithium-Ion battery driven applications that
require different power rails. The S-GOLDradio PMU provides two fully integrated, highly efficient,
step-down converters for the main loads such as cores and memories. Both step-down converters
support low power modes (PFM) for maximum efficiency at all times, the output voltages are stable
under all load conditions.
For supply voltages higher than the battery voltage, the S-GOLDradio PMU provides a step-up converter.
This step-up converter provides the supply voltage to, for example, serial connected LED’s used in
display backlight. A number of LDOs are available to provide different supply rails for different needs.
In addition, the S-GOLDradio PMU supports charging of the battery and generates the power-on reset. It
also provides stand-by voltages and supports different low power modes.
See Figure 4.
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