Only For Training And Service Purposes - LG GM310 Service Manual

3. BB Circuit Technical brief
• Vibrator driver with adjustable voltage
• Fully controlable by software via I2C - Bus
• Temperature and battery voltage sensors
• Interrupt channels for peripherals
• System debug mode
• VQFN 48 package with heat sink and non-protruding leads
• Compatible with the Infineon E-GOLD+ V2 and V3
SM-POWER is a further step on the successful E-Power product line with enhanced and optimized
functionality.
SM-POWER features a baseband supply concept with a DC/DC step-down converter cascaded by
two linear regulators
- SM-POWER's DC/DC converter makes up to 40 % reduction of battery current for smart phone
functions (e.g. organizer functions, games, MP3 decoding) possible.
- SDBB has high efficiency up to 95% and also a power save mode.
- Memory Interface is directly supported by the SDBB
- SDBB can also act as main supply voltage for E-GOLD+ or S-GOLDlite baseband devices.
- For S-GOLD two linear regulators for DSP and Core are cascaded after the SDBB.
SM-POWER supports the standby power-down concept of S-GOLD by temporarily switching off the
linear regulator for the DSP during mobile standby whenever this subsystem is not used. In this phase
the ARM controller and most peripherals including parts of the on-chip SRAM are kept powered-up
withpower being supplied by the other linear regulator.
SM-POWER includes a fully differential audio amplifier able to drive loads down to a nominal value of
8 Ohm for usage in hands-free phones and for ringing
- 450 mW maximum output power
- adjustable gain
- mute switch SM-POWER also integrates a charging function for Li-Ion, Li-Polymer batteries
- click and pop -protection SM-POWER also integrates a charging function for Li-Ion, Li-Polymer
batteries
- Precharge current source with two current levels
- Constant current / constant voltage charging with 3 different termination voltages
- Programable charge current limitation for use with different batteries
- Freely programable pulse charging to reduce the thermal power dissipation in the constant voltage
charging phase
LGE Internal Use Only
GM310f service manual
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Only for training and service purposes