MAX25505

RECOMMENDED FOR NEW DESIGNS

MAX25505

4 x 24 Automotive LED Matrix Drivers with ASIL Features

RECOMMENDED FOR NEW DESIGNS

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Part Models 4

1ku List Price Starting From $3.50

Features

Flexible Configuration
- Programmable Multiplex Ratio Between 4:1 and 1:1
- Integrated Column Drivers
- Programmable Dither for Enhanced Resolution
- Optional Individual Programmable Delays
- Optional Pseudorandom Spread Spectrum on Each Output
24 Row Drivers
- Up to 65mA Peak Output Current
- Very Narrow Minimum Current Pulse for Maximum Dimming Ratio
- Optional Ghosting Elimination
Extensive Diagnostics Supporting ASIL B
- Shorted or Open LEDs
- Programmable V_LED Overvoltage Detection with Flag
- 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 Optionally with CRC (MAX25505)
V_SYNC Synchronization Input (ProgrammableActive-High/Low)
48-Lead TQFN and TSSOP Packages
AEC-Q100 Grade 1Ordering

Additional Details

The MAX25504/MAX25505 are 4 x 24-channel modular matrix drivers. The integrated current outputs can sink up to 65mA 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 devices are highly flexible due to their programmability using the SPI interface. Among the programmable parameters are the LED current, individual PWM settings, and multiplex ratio.

The devices feature a high-speed interface for controlling up to 16 devices in a daisy-chain configuration. In addition, they include multiple diagnostic features to aid in the building of ASIL B systems.

The MAX25504/MAX25505 are available in TQFN and TSSOP packages and operate in the -40°C to +125°C temperature range.

APPLICATIONS

Central Information Displays
Instrument Clusters
Interior Lighting
Exterior Rear Lighting