Power Management Ic - LG KC560 Service Manual

3.3. Power management IC

3.3.1. General Description
SM-POWER is a highly integrated Power and Battery Management IC for mobile handsets. It has been
specially designed for usage with S-Gold3. Although optimized for usage with the Infineon S-GOLD
baseband device it is suitable for the S-GOLD lite and the E-GOLD+ baseband devices as well. It also
supports the cellular RF devices like SMARTi-DC, SMARTi-DC+, SMARTi-SD and the Bluemoon
Single, Infineon's single chip solution for Bluetooth. If used with S-GOLD3 it provides all power supply
functions (except for the RF PA) for a complete advanced GSM Edge smart phone minimizing external
device count.
Block Description
Highly efficient step-down converter for main digital baseband supply including Core, DSP and
Memory interface (External Bus Unit).
Support of S-GOLD standby power-down concept
Low-drop-out (LDO) regulators for Flash and mobile RAM memory devices
Voltage independent switching of two SIM cards
LDO regulators for baseband I/O supply
LDO regulator for analog mixed-signal section of S-GOLD
Low-noise LDO regulators for RF devices
Supply for Bluemoon Single, Infineon's single chip solution for Bluetooth
Audio amplifier 8 Ohms for Handsfree operation and ringing
Charge Control for charging Li-Ion/Polymer batteries under software control
Pre-charge current generator with selectable current level
RTC regulator with ultra-low quiescent current
USB interface support for peripheral and mini-host mode
Backlight LEDs driver with current selection and PWM dimming function
Two single LED driver outputs for signaling
Vibrator driver with adjustable voltage
Fully controllable 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.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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3. TECHNICAL BRIEF
LGE Internal Use Only