Texas Instruments TLC69629-Q1 48-Channel LED Drivers
Texas Instruments TLC69629-Q1 48-Channel LED Drivers can provide up to 16-bit individual pixel-level LED PWM control. The additional 7-bit dot correction (DC) is also implemented for each channel to control peak current. Each device shares a data stream by cascaded serial interface (CSI), which supports up to 511 device connections. The interface can be applied to various application scenarios based on LED current and total number of LEDs, and the software is compatible with LED drivers within the same group.
To optimize overall systematic power efficiency, the device is equipped with an Adaptive Headroom Voltage Control (AHVC) scheme to optimize headroom voltage across each channel and device. Only the OUT47 pin from the last daisy-chain device must be programmed as an FB pin to optimize LED supply voltage from DC-DC. The Texas Instruments TLC69629-Q1 is equipped with diagnostics for LED, current sink, communication, and device.
Features
- AEC-Q100 qualified for automotive applications
- Grade 1: –40°C to 125°C ambient operating temperature
- Device HBM classification level H1C
- Device CDM classification level C4B
- Functional safety-compliant
- Developed for functional safety applications
- Documentation available to aid ISO 26262 system design up to ASIL B targeted
- 48 integrated current sinks
- Programmable 16-bit PWM / hybrid dimming
- Programmable 7-bit analog dot correction (DC)
- Maximum output current, voltage: 60mA, 16V
- Integrated 33MHz oscillator
- 16-bit PWM output at 500Hz
- > 20KHz refresh rate with enhanced spectrum (ES) PWM
- High-speed communication
- Cascaded serial interface (CSI)
- Data rates up to 17Mbps
- Power efficiency optimization
- Adaptive headroom voltage control (AHVC)
- Device power save mode (PSM)
- EMI mitigation
- Interface: programmable buffer driving capability
- Current sinks: phase shifting/spread spectrum
- Protection and diagnostic
- LED: open/short detection/health check
- Current sink: adjacent-pin short/health check
- Interface: CRC/command error/time-out error/communication watchdog
- Device: under voltage/ISET out of range/thermal shutdown/memory CRC/OTP CRC/OSC watchdog
Applications
- Automotive central information display
- Automotive cluster display
- Automotive head-up display
Simplified Schematic
