MAX25505B

RECOMMENDED FOR NEW DESIGNS

MAX25505B

4x24 Automotive LED Matrix Driver with ASIL Features

RECOMMENDED FOR NEW DESIGNS

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Part Models 4

1ku List Price

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Features

Flexible Configuration
- Programmable Multiplex Ratio between 4:1 and1:1
- Integrated Column Drivers
- Programmable Dither for Enhanced Resolution
- Optional Individual Programmable Delays
- Optional Pseudorandom Spread Spectrum onEach Output
24 Row Drivers
- Up to 72mA Peak Output Current
- Very Narrow Minimum Current Pulse forMaximum Dimming Ratio
- Optional Ghosting Elimination
Extensive Diagnostics Supporting ASIL B
- Shorted or Open LEDs
- Programmable V_LED Overvoltage Detection withFlag

Adjacent SNK_ to SNK_ Short Detection
Shorted SNK_ or SRC_ to GND
ISET Out of Range
Internal Clock Out-of-Range Detection
Bandgap Reference Out-of-Range
CRC on Internal Memory Contents
Undervoltage/Overvoltage Detection on AllSupplies
Thermal Warning/Shutdown

FB Output to Control External DC-DC Converter
SPI Interface with CRC
V_SYNC Synchronization Input (ProgrammableActive-High/Low)
48-Lead TQFN and TSSOP Packages
AEC-Q100 Grade 1Ordering

Additional Details

The MAX25505B is a 4x24-channel modular matrix driver. The integrated current outputs can sink up to 72mA LED current each. The source drive pins provide current to the columns of the matrix on a multiplexed basis. Device power comes from an external 3.3V or 5V supply while the LED current-sink outputs can operate at up to 14V.

A feedback output pin (FB) is provided to control an external DC-DC converter so that voltage headroom can be optimized and the overall system power dissipation reduced. The device is highly flexible due to its programmability using the SPI interface. Among the programmable parameters are the LED current, individual PWM settings, and multiplex ratio.

The device features a high-speed interface for controlling up to 16 devices in a star configuration. In addition, it includes multiple diagnostic features to aid in the building of ASIL B systems.

The MAX25505B is available in TQFN and TSSOP packages and operates in the -40°C to +125°C temperature range.

APPLICATIONS

Central Information Displays
Instrument Clusters
Interior Lighting
Exterior Rear Lighting