Only For Training And Service Purposes - LG GU280 Service Manual

3.2.3. Power Amplifier Module
The ACPM-5201 is a fully matched 10-pin surface mount module developed for UMTS Band1.
This power amplifier module operates in the 1920-1980MHz bandwidth.
The ACPM-5001 meets stringent UMTS linearity requirements up to 27.5dBm output power.
The 3mmx3mm form factor package is self contained, incorporating 50ohm input and output matching
Networks The ACPM-5201 features 5th generation of CoolPAM circuit technology which supports 3 power modes
– bypass, mid and high power modes. The CoolPAM is stage bypass technology enhancing PAE (power added
efficiency) at low and medium power range. Active bypass feature is added to 5th generation to enhance PAE
further at low output range. This helps to extend talk time. A directional coupler is integrated into the module and
both coupling and isolation ports are available externally, supporting daisy chain.
The power amplifier is manufactured on an advanced InGaP HBT (hetero-junction Bipolar Transistor)
MMIC (microwave monolithic integrated circuit) technology offering state-of-the-artreliability, temperature stability
and ruggedness.
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Only for training and service purposes

Figure 1.2.3.1 ACPM-5201 Functional Block Diagram
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3. Technical Brief
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