Cosine COS6501
Transformer Driver
FEATURES
● Push-pull driver for transformers● Operates with 2.7-V to 5.5-V supply
● High output drive: 1A at 5V supply
● Low RON 0.25Ω at 4.5V
● Spread spectrum clocking (SSC)
● Ultra-low EMI
● Precision internal oscillator
● Slew-rate control
● 1.7A Current-limit
● Low shutdown current: <1 μA
● Thermal shutdown protection
● Wide temperature range: –45°C to 125°C
● Small package: SOT23-5
APPLICATIONS
● Isolated Interface Power Supply for CAN, RS-485, RS422, RS-232, SPI, I2C● Low-Power LAN
● Isolated USB Supplies
● Industrial Automation
GENERAL DESCRIPTION
The COS6501 is a low-EMI push-pull transformer 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 2.7-V or 5-V DC power supply. The secondary can be wound to provide any isolated voltage based on transformer turns ratio. The COS6501 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.