VC5134
High-efficiency multi-mode PA covering B1/B3/B34/B39 bands with 28.5dBm output power and integrated directional coupler.
Product Overview
Description
The VC5134 is a versatile multi-mode power amplifier supporting major 4G LTE mid-bands including B1, B3, B34, and B39.
With 28.5dBm output power and 45% PAE, this PA delivers excellent performance for LTE and LTE-Advanced applications.
The integrated directional coupler simplifies power control implementation, reducing external component count.
Product Series
VC
Primary Application
4G smartphones
Key Features
- Multi-band B1/B3/B34/B39 coverage
- High efficiency 45% PAE
- Integrated directional coupler
- APT/DPT support
- MIPI RFFE control
- Compact CSP package
Specifications
| Frequency Bands | B1/B3/B34/B39 |
|---|---|
| Output Power | 28.5 dBm |
| PAE | 45% |
| Gain | 28 dB |
| EVM | < 3% |
| ACLR | < -38 dBc |
| Supply Voltage | 3.4 V |
| Package | CSP 3.0×3.0 mm |
Applications
4G smartphones
Electronic system design
LTE tablets
Electronic system design
Mobile hotspots
Electronic system design
IoT gateways
Electronic system design
FAE Expert Insights
"The VC5134 has been a workhorse PA in numerous 4G smartphone designs I've supported. Its multi-band capability covering the critical B1/B3 bands makes it ideal for China and European markets. The integrated directional coupler is a real differentiator - it saves board space and simplifies the power control loop design. I've consistently seen 45%+ PAE in real applications, which translates to noticeably better battery life. For cost-optimized 4G designs, this is an excellent choice."
Multi-band coverage with integrated coupler saves BOM cost and PCB space
— David Liu, BeiLuo
Frequently Asked Questions
How does the integrated directional coupler work in VC5134?
The VC5134 integrated directional coupler provides -20dB coupled output for power detection: (1) Coupled port outputs a sampled version of the transmit signal; (2) Connect to power detector IC or transceiver's internal detector; (3) Enables closed-loop power control maintaining ±0.5dB accuracy; (4) Eliminates need for external coupler, saving ~0.5mm² PCB area; (5) Coupler is internally matched and temperature compensated. The coupling factor is flat across the operating bandwidth, ensuring accurate power measurement across all supported bands.
Use the integrated coupler for power control instead of adding external components.
What is APT and DPT support in VC5134?
VC5134 supports both APT (Average Power Tracking) and DPT (Dynamic Power Tracking): (1) APT - adjusts supply voltage based on average output power level, improving efficiency at back-off power; (2) DPT - dynamically optimizes bias settings in real-time based on instantaneous power requirements; (3) APT mode provides 3-5% efficiency improvement at 16-20dBm operation; (4) DPT mode offers maximum efficiency across all power levels but requires more complex control; (5) Both modes are selectable via MIPI RFFE registers. For typical smartphone applications, APT provides the best balance of efficiency improvement and implementation simplicity.
Implement APT for typical applications, DPT for premium devices requiring maximum battery life.
Can VC5134 support LTE-Advanced with carrier aggregation?
Yes, VC5134 supports LTE-Advanced carrier aggregation: (1) Intra-band CA - B1+B1 or B3+B3 contiguous/non-contiguous; (2) Inter-band CA - B1+B3, B1+B34, B3+B39 combinations; (3) Supports up to 2 CA with 40MHz total bandwidth; (4) Maintains ACLR <-38dBc under CA operation; (5) Compatible with envelope tracking (ET) systems for CA efficiency optimization. For CA applications, the PA's wide bandwidth and excellent linearity ensure clean signal transmission without interference between aggregated carriers.
Verify CA band combinations with your transceiver and contact FAE for CA-specific tuning recommendations.
What are the key differences between VC5134 and VC5778?
VC5134 and VC5778 target different applications: (1) Bands - VC5134 covers 4G mid-bands (B1/B3/B34/B39), VC5778 covers 5G high-bands (n77/n78); (2) Power - VC5134 delivers 28.5dBm for 4G, VC5778 delivers 26dBm for 5G; (3) Efficiency - VC5134 achieves 45% PAE, VC5778 achieves 42% PAE; (4) Features - VC5134 has integrated coupler, VC5778 has integrated power detector; (5) Package - both use CSP but different sizes. Choose VC5134 for 4G designs, VC5778 for 5G high-band coverage. Both can be combined for 4G+5G concurrent operation.
Select based on your target cellular bands. Contact FAE for multi-mode 4G+5G design recommendations.
What is the typical current consumption of VC5134?
VC5134 current consumption varies with operating mode: (1) Max power (28.5dBm) - 550mA typical, 650mA max; (2) Mid power (20dBm) - 280mA typical with APT enabled; (3) Low power (10dBm) - 120mA typical; (4) Bypass mode - <1mA for receive operation; (5) Shutdown mode - <10μA. The high efficiency (45% PAE) minimizes current draw compared to competing solutions. At typical urban usage patterns (mix of high and low power), average current is approximately 180-220mA.
Use APT mode and implement dynamic power control to minimize average current consumption.