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ACPM-7357 Datasheet(PDF) 9 Page - AVAGO TECHNOLOGIES LIMITED |
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ACPM-7357 Datasheet(HTML) 9 Page - AVAGO TECHNOLOGIES LIMITED |
9 / 19 page 9 Marking Specification CoolPAM Avago Technologies’ CoolPAM is stage-bypass PA technol- ogy which saves more power compared with convention- al PA. With this technology, the ACPM-7357 has very low quiescent current, and efficiencies at low and medium output power ranges are high. Incorporation of bias circuit The ACPM-7357 has internal bias circuit, which removes the need for external constant voltage source (LDO). PA on/off is controlled by Ven. This is digitally control pin. 3-mode power control with two mode control pins The ACPM-7357 supports three power modes (bypass power mode/mid power mode/high power mode) with two mode control pins (Vmode and Vbp). This control scheme enables the ACPM-7357 to save power consump- tion more, which accordingly gives extended talk time. PDF (probability density function) in the Figure 1. showing distribution of output power of mobile in real field gives motivation for stage-bypass PA. Output power is less than 16dBm for most of operating time (during talking), so it is important to save power consumption at low and medium output power ranges. Figure 1. PDF and Current Average current & Talk time Average current consumed by PA can be calculated by summing up current at each output power weighted with probability. So it is expressed with integration of multipli- cation of current and probability at each output power. Average current = ³ (PDF x Current) dp Talk time is extended more as average current consump- extended more as average current consump- more as average current consump- consump- tion is lowered. Manufacturing Part Number Lot Number P Manufacturing info YY Manufacturing Year WW Work Week AAAAA Assembly Lot Number Pin1 Mark AVAGO ACPM-7357 PYYWW AAAAA |
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