Switched Tank Converter (STC) Controller with Integrated Drivers

The MAX16610/MAX16610A ICs are highly integrated, scalable, controllers for a switched tank converter (STC) topology. The STC provides highly efficient zero-current switching (ZCS) voltage conversion from a 60V–40V input bus to an intermediate bus voltage. The intermediate bus voltage is unregulated and is approximately a quarter of the input voltage.

The 4:1 STC topology has 10 FETs that need to be driven, with only 3 of the FETs connected to ground. The MAX16610/MAX16610A provide an extremely dense solution with integrated drivers and generation of floating supplies.

An adaptation algorithm tunes the STC on-times to maintain ZCS, regardless of variations in and tolerances of the STC components (e.g., temperature coefficient, aging, and voltage derating). With the adaptation algorithm, a MAX16610/MAX16610A-controlled STC can use Class II capacitors in the resonant tanks to save on cost and improve efficiency compared to Class I capacitor designs.

Multiple fault protection features prevent damage to the STC converter and downstream components.

Applications

* DDR Memory * High-Power VR13.HC CPUs * Machine Learning ASICs and Accelerator Cards * Networking ASICs

* High Density and Simplified Design

* Integrated Drivers for 10 FETs

* Integrated Floating Domains Generation

* Efficiency Optimization Regardless of Component Variation

* Adaptive On-Time Algorithm Ensures ZCS

* Support for Wide Range of Baseline Resonant Frequencies

* Higher Reliability

* Adaptive Algorithm Enforces a Minimum Off Time

* Prevents Component Over-Stress and Excessive Peak Currents

* Protection Features

* Input Overcurrent Protection (Latching)

* Output Overvoltage Protection

* Soar Mitigation and OVP

* Bias-Supply Undervoltage Protection

* Component Failure Protection

* Fault/Output Voltage Indicators

* Critical Fault-Flag Output Pin

* Power Good Indicator