MOSFET driver supports AC/DC rectification circuits
Designed for AC/DC rectification circuits in general consumer applications, notebooks and USB adapters, Diodes offers the APR348. The secondary-side, multi-mode synchronous rectification MOSFET driver supports continuous conduction mode (CCM), discontinuous conduction mode (DCM) and quasi-resonant (QR) flyback operation.
The APR348 is capable of driving the external MOSFET in both high-side and low-side secondary-side synchronous-rectifier configurations and supports secondary-side output voltages up to 20V in the three modes. These options give development teams freedom over how to implement synchronous rectification, says Diodes.
As the APR348 requires very few additional external components, Diodes adds, engineers can still realise small and efficient power supply designs that meet the demands of the consumer sector.
Fast turn-on and turn-off times reduce power loss and ensure safe operation when in CCM mode. The APR348 also features a blanking period to set the minimum turn-on period for the MOSFET. This feature significantly improves performance by limiting the impact of voltage ringing.
The APR348 also features a light load (LL) mode, which uses an internal timer to skip cycles when there is no load or only a light load detected at the output. This design delivers lower standby power at no load. Another benefit that minimises the bill of materials cost is that the high-side switching does not require an additional transformer winding.
The APR348 is available in the SOT26 Type CJ package.
Diodes is a Standard and Poor’s SmallCap 600 and Russell 3000 Index company. The company manufactures and supplies application-specific standard products within the broad discrete, logic, analogue and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC/DC converters and controllers, DC/DC switching and linear voltage regulators and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes also has timing, connectivity, switching, and signal integrity solutions for high-speed signals.