Server Solutions
Servers support the growing demand for instantaneous online access of information, faster & complex computing capability and unlimited storage in all aspects of our lives. High reliability & even higher efficiency are the key to deliver on the customer promise. Today, annual operating energy costs to power the servers and installed site cooling solution can well exceed the initial capital cost of the servers themselves. Traditional power management has given way to efficiency management to minimize system power losses in real time based on site conditions and processor demand. Voltage regulators (VR) for servers must provide precise power for high performance, state of the art microprocessors with improved system reliability, better thermals and longer MTBF than ever before.
CHiL Server solutions deliver best-in-class multiphase controllers and MOSFET drivers to enable real gains in efficiency and reliability while optimizing the features, cost, and size. They offer flexibility to operate seamlessly with industry leading power semiconductors for best sever VR designs.
Multiphase Controllers
CHiL’s intelligent digital multiphase PWM controllers for Servers feature
- The industry’s only 8 phase PWM controller
- Provides the required high phase count to meet the increasing microprocessor current demand
- Patented efficiency shaping techniques for highest efficiency
- Provides a flat η curve across the entire load range due to load current based parameter scaling.
- Robust and reliable data communication over PMBus/ SMBus
- Allows device configuration, monitoring and control with dynamic status updates of operating parameters and reporting back to system controller
- High bandwidth due to non linear control algorithm
- Improves transient response time, minimizes de-coupling capacitors and reduces VR solution footprint
- Space savings of premium board real estate in VRD or space constrained VRM under non optimal air flow and form factors
- Delivers cost savings and increases reliability
- Advanced digital design eliminates need for feedback components
- Flexible digital architecture accessible through a Graphic User Interface (GUI)
- Enables easy re-use and customization of design with minimum board changes – simplifies inventory management
| Part Number | Specification | Max # of ph | Package | Interface | Vcc | Max Fsw |
|---|---|---|---|---|---|---|
| CHL8314CRT | Intel VR11.x | 4 | QFN 48 | SMBus | 3.3V | 1 MHz |
| CHL8316CRT | Intel VR11.x | 6 | QFN 48 | SMBus | 3.3V | 1 MHz |
| CHL8318CRT | Intel VR11.x | 8 | QFN 56 | SMBus | 3.3V | 1 MHz |
MOSFET Drivers
CHiL’s high frequency synchronous MOSFET drivers for Servers feature
- Ability to switch large high and low side MOSFETs with low Rdson and high input capacitance at high frequency with short transition times
- Variable gate voltages optimized independently for both high and low side MOSFETs to reduce gate switching losses
- Short adaptive dead time for minimum MOSFET body diode conduction losses
- Fault coverage for input voltages and high side short protection
- Fast tri-level PWM allows rapid MOSFET disable and phase shedding for improved efficiency & simplifies board layout
- Thermally enhanced smaller profile DFN package for higher efficiency
| Part Number | High side Sink/ Source | Low side Sink/ Source | Vcc | Max Fsw | Package |
|---|---|---|---|---|---|
| CHL8500CRT | 1.65A/ 2.0A | 2.0A/ 3.0A | 12V | 1 MHz | DFN 10 |
| CHL8510CRT | 3.0A/ 4.0A | 4.0A/ 6.0A | 12V | 1 MHz | DFN 10 |
Further Information
- Technical Brief - Ripple reduction with increased phase count (pdf)
- Reduction of input capacitor RMS current with increased phase count
- Technical Brief - Diode emulation during load load release (pdf)
- Using diode emulation to reduce output voltage overshoot during a transeint load release