LG KE600 Service Manual - Page 32

3. TECHNICAL BRIEF 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-Gold2. Although optimized for usage with the Infineon SGOLD baseband device it is suitable for the S-GOLDlite 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-GOLD2 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 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 - 33 -