3.13.3 Power Block
3.13.3.1 General
MSM6280A, included RF, is fully covered by PM6658(Qualcomm PMIC). PM6658 cover the power of
MSM6280, MSM memory, RF block, 2M Camera, USB, USIM and TCXO.
Major power components are :
PM6658 (U801) : Phone power supply
SIA411DJ (Q800) : External charger supply switching & Main Battery charging control
3.13.3.2 PM6658
A functional block diagram for the PM6658 device is shown in Figure.
The input power management portion accepts power from common sources°™battery, external
charger, adapter, USB_VBUS, coin cell backup°™and generates all the regulated voltages needed to
power the appropriate handset electronics. It monitors and controls the power sources, detecting
which sources are applied, verifying that they are within acceptable operational limits, and coordinates
battery and coin cell recharging while maintaining the handset electronics supply voltages.
The device's general housekeeping functions include a sixteen-position analog multiplexer that Has 5
internal connections, 6 hardwired external connections, and supports an additional 12 External
connections via the multipurpose pins (MPPs). The internal connections are used to monitor on-chip
functions, such as the die temperature and bandgap reference voltage. The hardwired external
connections access input power nodes, such as VCHG, VBAT, etc. The 12 multipurpose pins can be
configured as analog inputs that are routed through switch circuits to create 5 multiplexer inputs; these
are available to monitor system parameters, such as temperatures and battery ID. The multiplexer
output signal's offset and gain is adjusted, then buffered and routed to the MSM device for analog-to-
digital conversion.
IC-level interfaces include the configurable serial bus interface (SBI) used by the MSM device to
control and status the PM6658 IC. This bus is supplemented by an interrupt manager for time- Critical
information. Another dedicated IC interface circuit monitors multiple trigger events and controls the
power-on/power-off sequences.
On-chip voltage regulators generate 19 programmable output voltages using a combination of 4
switched-mode power supplies and 15 low-dropout linear regulators, all derived from a Common
trimmed voltage reference. Two externally controlled bits allow selection of the default MSM core
voltage (VREG_MSMC = 1.200 or 1.375 V) and determine whether a buck regulator (VREG_S3) is
enabled or not upon power up.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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