Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

The SN6501 is a

monolithic oscillator/power-driver, specifically designed

for small form factor, isolated power supplies in isolated

interface applications. The device drives a low-profile,

center-tapped transformer primary from a 3.3-V or 5-V DC

power supply. The secondary can be wound to provide any

isolated voltage based on transformer turns ratio.

The SN6501 consists

of an oscillator followed by a gate drive circuit that

provides the complementary output signals to drive the

ground referenced N-channel power switches. The internal

logic ensures break-before-make action between the two

switches.

The SN6501 is

available in a small SOT-23 (5) package, and is specified

for operation at temperatures from –40°C to 125°C.