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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. BB Circuit Technical brief
GM310f service manual
DSP
DSPIN0
CLK32K
DSPOUT1
WDOG
Navi key LED Backlight Control
GPIO_63
HS_MIDI_EN Headset
MIDI
enable
GM310f 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
SGOLD
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