A REVOLUTIONARY APPROACH TO SUPPLY BIAS SIGNAL CONDITIONING
TransSiP has developed a new approach to noise reduction and switching noise jitter (SNJ) conditioning in switching DC-DC power conversion. Using cutting-edge real-time spectrum analysis techniques that reveal signal details invisible to conventional spectrum and vector signal analyzers, TransSiP's innovative DC-DC conversion circuit topology is applicable to a broad range of applications and compatible with system-in-package devices. This patent-pending design and methodology addresses the critical needs of noise-sensitive microsystems at the heart of portable, wearable, and IoT/M2M wireless communications and navigation for clean power and high conversion efficiencies in both full and standby power modes.
Seeing is Believing...
The well-known components of PFM supply bias noise:
- Output voltage ripple
- Harmonics of switching frequency/frequencies
- Ringing (due to parasitics)
- Spurious or transient events
can be filtered and suppressed, although the variable frequency of PFM switched-mode converters can make this problematic. However, once ripple and noise on the supply bias is attenuated, TransSiP has found that noise amplitude is no longer the dominant factor.
Real-time spectrum analysis provided the answer: there are very short, varying interval transient and spurious events associated with a time domain component. This component, which TransSiP has termed “SNJ” (switching noise jitter) is what causes the chaotic noise signatures that compromise powered system performance.
Read Tektronix’ case study here.
A New Approach
The insights provided by DPX® analysis and mathematical modelling led to the development of a new filtering concept for switched-mode PFM-type DC-DC converters. This new circuit topology can be implemented in the form of a discrete SiP component on the output of a PFM DC-DC converter, as a component set on a system motherboard, or as a complete DC-DC conversion solution: TransSiP's JC-PFM™
TransSiP's ground-breaking JC-PFM™ DC-DC converter system-in-package (SiP) uses TransSiP's patent-pending jitter conditioning technology to eliminate chaotic noise normally produced by pulse-frequency modulated DC-DC power conversion. For the first time, this breakthrough enables use of efficient, PFM DC-DC power conversion in highly noise-sensitive applications such as spread-spectrum communications (WiFi, BLE, ZigBee) and GPS/GNSS navigation receivers, bringing advances in battery life, transceiver range, and overall system performance to portable, wearable, IoT, and other power-constrained applications.
JC-PFM™ FULLY INTEGRATED PFM DC-DC ConverteR CHIPSET
- PFM DC-DC conversion with proprietary Technology
- Complete solution- no external power inductor or filter needed
- Switching frequency below 1MHz
- CL Discharge
- 0.4Ω N channel synchronous rectifier switch
- Smooth, transient-free standby-full power switching
- Enhances RF and Analog circuit performance
- Micro LGA packages
- Driver Transistor: 0.4Ω (P channel driver)
- Control Method: JC-PFM™ control
- Conversion Efficiency: >90%
- Input Voltage Range: 2.0～6.0V
- Output Voltage Setting: 1.2V/1.8V (±2.0%)
- Output Current: 50/200mA
- Ultra low Iq: 500nA @ VOUT=1.8V
- Function: Short Protection
- Dimensions: Micro Converter- 2.0 x 2.5mm, Harmony™ Conditioner- 2.2 x 2.6mm max.
- Ambient Operating Temp: -40 ～ +85°C