SN6505BDBVR Description
The SN6505BDBVR is a low-noise, low-EMI push-pull transformer driver developed for isolated power supply with a small form factor. It uses a 2.25 V to 5 V DC power source to drive low-profile, center-tapped transformers. Slew rate control of the output switch voltage and Spread Spectrum Clocking is used to achieve ultra-low noise and EMI (SSC). The SN6505BDBVR is made up of an oscillator and a gate drive circuit that generates complementary output signals for driving ground-connected N-channel power switches. To assure start-up under strong loads, the SN6505BDBVR incorporates two 1-A Power-MOSFETswitches. For proper placement of switcher harmonics or when working with several transformer drivers, the switching clock can alternatively be given externally.
SN6505BDBVR Features
Push-pull driver for transformers
Wide input voltage range: 2.25 V to 5.5 V
High output drive: 1 A at 5 V supply
Low RON 0.25 Ω max at 4.5 V supply
Ultra-low EMI
Spread-spectrum clocking
Precision internal oscillator options: 160 kHz (SN6505A) and 420 kHz (SN6505B)
Synchronization of multiple devices with external clock input
Slew-rate control
1.7 A Current-limit
Low shutdown current: <1 μA
Thermal shutdown
Wide temperature range: –55°C to 125°C
Small 6-Pin SOT23 (DVB) Package
Soft-start to reduce In-rush current
SN6505BDBVR Applications
Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN
Low-noise isolated USB supplies
Process control
Telecom supplies
Radio supplies
Distributed supplies
Medical instruments
Precision instruments
Low-noise filament supplies
