Power Amplifier Module - LG KF350 Service Manual

3.22 Power Amplifier Module

The TQM7M5005 is an extremely small (5x5x1.1mm3) multi-mode power amplifier module for
GSM/EDGE applications. This module has been optimized for high EDGE efficiency and EDGE power
class E2 operation while maintaining high GSM/GPRS efficiency. In EDGE mode, the Vramp pin
provides a continuously variable bias control to minimize current consumption during backed-off power
conditions. The module incorporates two highly integrated InGaP power amplifier die with a CMOS
controller. The CMOS controller implements a fully integrated closed-loop power control within the
module for GSM Operation. This eliminates the need for any external couplers, power detectors,
current sensing etc., to assure the output power level. The latter is set directly from the Vramp input
from the DAC. The module has Tx enable, band select, mode (EDGE or GSM) inputs. Module
construction is a low-profile over-molded land-grid array on laminate.
Table 10 PAM pin description
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Only for training and service purposes
3. TECHNICAL BRIEF
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