Texas Instruments SN6505B | Demoboard PMP30555

Description

This reference design is an isolated open-loop push-pull with “cascode” FETs that finds its typical application in isolated gate drive supply. The cascode connection extends the input voltage range of SN6505B from 5 V to 24 V, and two outputs supply 15 V at 120 mA and 5 V at 350 mA. Its 2-mm transformer makes the solution ultra-thin.

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 (DBV) package
• Soft-start to reduce In-rush current

Typical applications

• Medical instruments
• Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN / Distributed supplies / Low-noise filament supplies
• Telecom supplies / Radio supplies
• Process control / Precision instruments

More information

• IC product information