LG -P990 Service Manual page 49

3.10.3 Charging control
3.10.3.1 Charging control
P970 uses individual Charger IC which is RT9524.
P990 uses individual Charger IC which is RT954.
Features
Features
28V Maximum Rating for DC Adapter
- 30V Maximum Rating for DC Adapter
- Internal Integrated Power MOSFETs
Internal Integrated Power MOSFETs
- Support 4.V/.3A Factory Mode
Support 4.2V/2.3A Factory Mode
- 50mA Low Dropout Voltage Regulator
50mA Low Dropout Voltage Regulator
- Status Pin Indicator
Status Pin Indicator
- Progrmmed Chaeging Current
Programmed Charging Current
- Under Voltage Lockout
Under Voltage Lockout
- Over Voltage Protection
Over Voltage Protection
- Thermal Feedback Optimized Charge Rate
Thermal Feedback Optimized Charge Rate
- RoHS Compliant and Halogen Free
RoHS Compliant and Halogen Free
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3. TECHNICAL BRIEF
Only for training and service purposes