Product Overview
The AL5958Q is a 48-channel constant current source LED driver featuring 16 built-in NMOS scan switches, designed for automotive matrix display and illumination applications. Its advanced features enhance safety, personalization, and aesthetics in new vehicle platforms.
The integrated intelligent matrix display command functions significantly reduce the processing load on the local microcontroller. Key system performance features include automatic black-frame insertion to mitigate blur, open-LED fail line detection, and staggered current output delay to minimize inrush current.
With high 16-bit resolution dimming and RGB support, the AL5958Q offers precise brightness control and color mixing. Its multiplex-pulse density modulation (M-PDM) technology improves dynamic scanning refresh rates without increasing EMI-generating clock frequencies.
The device is available in the wettable W-QFN9090-76/SWP package. A standard compliance version, AL5958, is also available for industrial and commercial applications.
The product is Automotive-compliant, AEC qualified, manufactured in sites certified to IATF 16949, and supports PPAP documents.
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The DIODES Advantage
The AL5958Q enables precise dimming control and diagnosis for each matrix LED pixel via a digital serial interface connected to the MCU.
Key Features:
- Built-In Intelligent Command Functions: Reduces local MCU overhead with automatic black-frame insertion, ghost elimination, short LED caterpillar detection, open fail-line abatement, current output staggering, grayscale enhancement, and a watchdog timer.
- 48-Channel Linear Source LED Driver with 16 Built-In Scan NMOS Switches: Provides a compact daisy-chain solution for animated or matrix LED displays, supporting cascaded devices without limitation.
- 16-Bit PWM and 3 Independent 6-Bit Global for Each RGB Group: Delivers high-resolution color and brightness control.
- Error Flag Registers: Applied for LED Open/Short detection on each channel, UVLO protection, and a watchdog timer. Reports individual pixel status for improved robustness.
Automotive Applications
- Central information displays
- Cluster displays
- Head-up displays
- Grill lights
- Body mini-LED panels
- Interior lights
- Rear lights
System Diagrams
The document includes diagrams illustrating the AL5958Q's integration into automotive lighting systems. One diagram shows the AL5958Q chip connected to 32 scan lines and 32 sets of RGB LEDs, demonstrating the 48-channel output driven by a scan matrix architecture. Another diagram provides a simplified view of the chip's connections, including control interfaces (GCK, LAT, DCK, DI), power, ground, and external current-setting resistors (REXT).
Technical Overview: Adjustable-Current Linear LED Driver
| Part Number | Supply Voltage Range | Type | Max. VOUT | Number of Channels | Max Scans | Max. Channel Output Current | Accuracy | Memory | Interface | Global ADIM Bits | PWMDIM Bits | Ambient Temperature Range | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AL5958Q | 3 to 5 V | Source | 5.0 V | 48 | 32 | 20 mA | ±1.5 % | 3x16K SRAM | SSI-4* | 3 x 6 | 16 | -40 to +125 °C | W-QFN9090-76/SWP (Type A1) |
| AL5887Q | 2.7 to 5.5 V | Sink | 5.5 V | 36 | 0 | 70 mA | ±3 % | 0 | I2C/SPI | 6 | 12 | -40 to +125 °C | W-QFN6060-52/SWP (Type A1) |
* SSI-4: Serial Synchronous Interface - 4 wires
Ordering Information
| Orderable Part Number | Compliance (Only Automotive Supports PPAP) | Package | Moisture Sensitivity | Quantity | Carrier |
|---|---|---|---|---|---|
| AL5958QJCZW76-13 | Automotive | W-QFN9090-76/SWP (Type A1) | MSL-3 | 2,500 | 13" Tape & Reel |
