MAX13256
MAX13256
PRODUCTION36V H-Bridge Transformer Driver for Isolated Supplies
Wide-Range Transformer Driver Simplifies Isolated Power Designs
- Part Models
- 2
- 1ku List Price
- Starting From $4.40
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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
- 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)
The MAX13256 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 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 MAX13256 is set by an external resistor. An 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 features an internal oscillator for autonomous operation and an external clock source input to synchronize multiple MAX13256 devices and precisely set the switching frequency. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC current 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
- 24V PLC Supply Isolation
- Isolated Fieldbus Interfaces
- Medical Equipment
- Motor Controls
- Power Meters
Documentation
Data Sheet 1
User Guide 3
Design Note 2
Technical Articles 3
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 |
|---|---|---|---|
| MAX13256ATB+ | 10-Lead TDFN (3mm x 3mm x 0.75mm) | ||
| MAX13256ATB+T | 10-Lead TDFN (3mm x 3mm x 0.75mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX13256ATB+ | PRODUCTION | |
| MAX13256ATB+T | PRODUCTION | |
|
Apr 27, 2024 - 2400 ASSEMBLY |
||
| MAX13256ATB+ | PRODUCTION | |
| MAX13256ATB+T | PRODUCTION | |
|
Apr 8, 2022 - 2201 WAFER FAB |
||
| MAX13256ATB+ | PRODUCTION | |
| MAX13256ATB+T | PRODUCTION | |
|
Oct 11, 2013 - 1345 ASSEMBLY |
||
| MAX13256ATB+ | PRODUCTION | |
| MAX13256ATB+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareEvaluation Kits
Evaluation Kit for the MAX13256
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