Power Management - LG -T370 Service Manual

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

3.1.8 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-Polymer
• 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) p ( g )
LGE Internal Use Only - 17 - Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes