Digital Power Controllers Integrate Active, Accurate Current Sharing
Zilker Labs introduced adaptive DC/DC power controllers for maximizing efficiency in power-constrained applications. The ZL2006 and ZL2004 –additions to the company’s Digital-DC product family – include new proprietary algorithms that dynamically optimize efficiency as operating conditions change, with no interaction or additional components required. These algorithms are said to result in a full-load efficiency improvement up to 3 percent and a light-load efficiency increase greater than 15 percent in typical applications, reducing peak power dissipation in embedded computing, storage, and telecom/datacom applications. This ability enables the ZL2006 and ZL2004 to address the growing concerns of meeting Energy Star efficiency guidelines, which become progressively more difficult each year. These products allow designers to deploy one flexible device in multiple power applications due to the integration of active, accurate current sharing. The ZL2006 is a universal power building block that can be used alone or connected in parallel to address a wide variety of load currents with a single IC. Additionally, both the ZL2006 and ZL2004 support accurate, robust current sharing between paralleled ICs through a proprietary single-wire Digital-DC bus. This high-speed bidirectional bus provides a simple, robust communications channel over which multiple Digital-DC devices can share current information to provide N+1 redundant operation in mission-critical applications. If one device is subjected to a fault condition, the current sharing master duties can be transparently passed to another IC to provide continuous operation.