1 Features

? Push-pull driver for isolation transformers

? Wide input voltage range: 3 V to 36 V

– Input voltage tolerance up to 60 V

– Duty-cycle control for line regulation

? 0.5-A switches with programmable current limit

? Wide switching frequency range: 100 kHz to 2

MHz

– Compatible with small-footprint transformers

– Programmable switching frequency

– External clock synchronization option

? Low noise and emissions

– Symmetric push-pull topology

– Spread sprectrum clocking

– Pin-configurable slew-rate control

? Protection Features

– Adjustable under voltage lockout (UVLO)

– Programmable over-current protection (OCP)

– Over voltage lockout (OVLO)

– Thermal shutdown (TSD)

? Wide temperature range: –55°C to 125°C

? Programmable soft-start to reduce in-rush current

? 10-Pin HVSSOP (DGQ) package with thermal pad

2 Applications

? Solar inverters, protection relays

? Factory automation

? Building automation

? Medical instruments

? Motor drives: IGBT and SiC gate-driver supplies

? Isolated power supply for CAN, RS-485, RS-422,

RS-232, SPI, I2C, low-power LAN

3 Description

The SN6507 is a high voltage, high frequency pushpull

transformer driver providing isolated power in a

small solution size. The device comes with the pushpull

topology’s benefits of simplicity, low EMI, and

flux cancellation to prevent transformer saturation.

Further space savings are achieved through dutycycle

control, which reduces component count for

wide-input ranges, and by selecting a high switching

frequency, reducing the size of the transformer.

The device integrates a controller and two 0.5-A

NMOS power switches that switch out of phase. Its

input operating range is programmed with precision

undervoltage lockouts. The device is protected

from fault conditions by over-current protection

(OCP), adjustable under-voltage lockout (UVLO), over

voltage lockout (OVLO), thermal shutdown (TSD), and

break-before-make circuitry.

The programmable Soft Start (SS) minimizes inrush

currents and provides power supply sequencing for

critical power up requirements. Spread Spectrum

Clocking (SSC) and pin-configurable Slew Rate

Control (SRC) further reduces radiated and conducted

emissions for ultra-low EMI requirements.

The SN6507 is available in a 10-pin HVSSOP DGQ

package. The device operation is characterized for a

temperature range from –55°C to 125°C.