Transformer Driver for Isolated Power Supplies
The NSIP6051 is a push-pull transformer driver specially designed for small size, low-power isolation power supply with low standby power consumption. Its periphery only needs to match simple input and output filter capacitors, isolation transformer and rectifier circuits. Its internal integrated oscillator provides a pair of high-precision complementary signals to drive two N-channel MOSFETs. The internal design of the chip follows a symmetrical structure, which can effectively ensure the high symmetry of the two power MOSFETs and avoid magnetic bias during the working process of the circuit. Ultra-low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The internal protection features include over current protection, under-voltage lockout, thermal shutdown and break-before-make circuitry. The NSIP6051 is available in a small SOT-23 (5) package, and is specified for operation at temperatures from –40°C to 125°C.
Product Features
• Push-pull driver for transformers
• Single 3.3-V or 5-V supply
• High primary-side current drive:
5-V Supply: 350 mA (Max)
3.3-V Supply: 150 mA (Max)
• Low ripple on rectified output permits small output capacitors
• Thermal shutdown
• Over-current protection (OCP)
• Current limit 0.33A
• Spread Spectrum Clocking
• Small 5-Pin SOT-23 Package
Application
• Isolated interface power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, Low-Power LAN
• Industrial automation
• Process control
• Medical equipment
Functional Block Diagram
For more product information, please contact us.
