MAX22256AATB+

MAX22256AATB+ is a compact, 36V H-bridge transformer driver for isolated supplies. It provides a simple solution for making isolated power supplies over 15W. It drives a transformer’s primary coil with up to 650mARMS of current from a wide 5V to 36V DC supply. It features a resistor-adjustable current limit that allows indirect limiting of the secondary-side load current and protects the primary power source in the event of secondary- or field-side failure. The device can be operated using the accurate internal oscillator or driven by an external clock to synchronize multiple devices and precisely set the switching frequency. Key applications are isolated motor drive gate power supply, isolated +24V PLC field supply.

• Simple, flexible design, 5V to 36V supply range, up to 91% efficiency
• Provides over 15W to transformer, undervoltage lockout, internal or external clock source
• Programmable overcurrent threshold
• Robust integrated system protection, fault detection and indication
• Overcurrent limiting up to 1A, over-temperature protection
• Precision internal clock source(±6%) prevents excessive transformer core loss due to frequency shift
• 30ns dead time
• 10-pin TDFN-EP package
• Temperature range from -40°C to +125°C
• High-side driver output on-resistance is 0.52ohm (ST1=ST2=high, IST1, ST2=200mA, RLIM=1.2kohm)

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party