SRK2001

SRK2001 is an adaptive synchronous rectification controller for LLC resonant converter. It implements a control scheme specific for the secondary side synchronous rectification in LLC resonant converters that use a transformer with center tap secondary winding for full wave rectification. It provides two high current gate drive outputs, each capable of directly driving one or more N-channel power MOSFET. The control scheme ensures that each synchronous rectifier is switched ON as the corresponding half-winding starts conducting and OFF as its current falls to zero. The low consumption mode of the device allows for meeting the most stringent requirements for converter power consumption in light-load and no-load conditions. A very low external component count is required when using this device. Typical applications are AC-DC adapters, All-in-one PC, High-end flat panel TV, 80+/85+ compliant ATX SMPS, 90+/92+ compliant SERVER SMPS, Industrial SMPS.

• Secondary side synchronous rectification controller optimized for LLC resonant converter
• Dual gate driver for N-channel MOSFET, adaptive turn-off logic, protection against current reversal
• Turn-on logic with adaptive masking time, auto-compensation of parasitic inductance
• VCC operating voltage range from 4.5V to 32V
• High voltage drain-to-source Kelvin sensing for each SR MOSFET
• Safe management of load transient, light-load and startup conditions
• Programmable exit load levels from burst mode
• Compatible with standard-level MOSFET
• SSOP10 package
• Junction temperature operating range from -40 to 150°C