MAX25256
MAX25256
RECOMMENDED FOR NEW DESIGNSAutomotive, 36V H-Bridge Transformer Driver for Isolated Supplies
Small, Simple Isolated Supply for EV/HEV Applications to Bias Gate Drives
- Part Models
- 2
- 1ku List Price
- Starting From $1.27
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Overview
- Simple Flexible Design
- 8V to 36V Supply Range
- Up to 90% Efficiency
- Provides Up to 10W to the Transformer
- Undervoltage Lockout (UVLO)
- 2.5V to 5V Compatible Logic Interface
- Internal or External Clock Source
- Adjustable Overcurrent Threshold
- Integrated System Protection
- Fault Detection and Indication
- Overcurrent Limiting
- Overtemperature Protection
- Saves Space on Board
- Small 10-Pin TDFN Package (3mm x 3mm)
- AEC-Q100 Qualified
The MAX25256 H-bridge transformer driver provides a simple solution for making isolated power supplies up to 10W. The device drives a transformer’s primary coil with up to 300mA of current from a wide 8V to 36V direct current (DC) supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage.
The device features adjustable current limiting, allowing indirect limiting of secondary-side load currents. The current limit of the MAX25256 is set by an external resistor. A active-low FAULT output asserts when the device detects an overtemperature or overcurrent condition. In addition, the device features a low-power mode to reduce the overall supply current to 0.65mA (typ) when the driver is not in use.
The device can be operated using the internal oscillator or driven by an external clock to synchronize multiple MAX25256 devices and precisely set the switching frequency. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC flow through the transformer, regardless of which clock source is used.
The device is available in a small 10-pin (3mm x 3mm) TDFN package and is specified over the -40°C to +125°C automotive temperature range.
Applications
- Dual-Battery Systems
- Isolated Gate Driver Supplies
- Isolated Supplies for controller area network (CAN), serial peripheral interface (SPI), I2C, etc.
- Isolated Supplies for Motor Control
Documentation
Data Sheet 1
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX25256ATBA/V+ | 10-Lead TDFN (3mm x 3mm x 0.75mm) | ||
| MAX25256ATBA/V+T | 10-Lead TDFN (3mm x 3mm x 0.75mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 27, 2024 - 2400 ASSEMBLY |
||
| MAX25256ATBA/V+ | PRODUCTION | |
| MAX25256ATBA/V+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- MAX25256
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Evaluation Kit for the MAX25256