Power Management - LG -A258 Service Manual

3. TECHNICAL BRIEF
3.2.6 Mixed Signal
• Improved audio performance
• Loudspeaker Audio Class D Amplifier, 700 mW@8 mono for hands-free and ringing
• Stereo Headset 2x30 mW@16 w/o coupling C
• Mono Earpiece 100 mW@16
• Digital microphone supported
• Differential microphone input
3.2.7 FM Radio
• Integrated FM radio
– FM Stereo RDS Receiver
– Sensitivity 2 V EMF
– Support for US & EU bands
– Stereo recording

3.2.8 Power Management

• Direct-to-Battery Connection
– LDOs (incl. capless)
– DC/DC step-down converter
– DC/DC step-up for white LED supply
• Battery Type
– Li-Ion
• Charging control
– Battery temperature
– Watchdog protection
– Start-up on flat battery
• External Charger
– Switch mode
• USB battery charging
– USB charging spec 1.0 compliant
• Backlight
– Up to 4 serial white LEDs (integrated LDO)
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