Product
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TLC69638-Q1
  • TLC69638-Q1
  • TLC69638-Q1

TLC69638-Q1

ACTIVE

Automotive, 48-channel, 100mA, functional safety-compliant local dimming backlight LED driver

Texas Instruments TLC69638-Q1 Product Info

1 April 2026 0

Parameters

Number of channels

48

Topology

Current Sink

Rating

Automotive

TI functional safety category

Functional Safety-Compliant

Operating temperature range (°C)

-40 to 125

Vin (min) (V)

3

Vin (max) (V)

5.5

Features

Adjacent-Pin Short Detection, CRC, Hybrid Dimming/Phase Shift, LED Open Detection, LED Short Detection, LED Short to Ground Detection, Local dimming, Spread Spectrum

Package

HTSSOP (DCA)-56-113.4 mm² 14 x 8.1

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: 100mA, 16V
  • Integrated 33MHz oscillator
    • 16-bit PWM output in 500Hz
    • > 20KHz refresh rate with enhanced spectrum (ES) PWM
  • High-speed communication
    • Serial peripheral interface (SPI)
    • 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
  • 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: 100mA, 16V
  • Integrated 33MHz oscillator
    • 16-bit PWM output in 500Hz
    • > 20KHz refresh rate with enhanced spectrum (ES) PWM
  • High-speed communication
    • Serial peripheral interface (SPI)
    • 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

Description

The TLC69638-Q1 is an LED driver with 48 constant current sink channels, which can provide up to 16-bit individual pixel-level LED PWM control. The additional 7-bit dot correction (DC) is also implemented to each channel to control peak current. Each device shares data stream by serial peripheral interface (SPI), which supports up to 511 devices connection. The interface is software compatible with LED drivers in the same group which can be applied to different application scenarios based on LED current and total LED number.

To optimize overall systematic power efficiency, the device is equipped with adaptive headroom voltage control (AHVC) scheme to optimize headroom voltage across each channel and device. Only the OUT47 pin from the last device of daisy chain is required to be programmed as FB pin to optimize LED supply voltage from DC/DC.

The TLC69638-Q1 is equipped diagnostics for LED, current sink, communication, and device.

The TLC69638-Q1 is an LED driver with 48 constant current sink channels, which can provide up to 16-bit individual pixel-level LED PWM control. The additional 7-bit dot correction (DC) is also implemented to each channel to control peak current. Each device shares data stream by serial peripheral interface (SPI), which supports up to 511 devices connection. The interface is software compatible with LED drivers in the same group which can be applied to different application scenarios based on LED current and total LED number.

To optimize overall systematic power efficiency, the device is equipped with adaptive headroom voltage control (AHVC) scheme to optimize headroom voltage across each channel and device. Only the OUT47 pin from the last device of daisy chain is required to be programmed as FB pin to optimize LED supply voltage from DC/DC.

The TLC69638-Q1 is equipped diagnostics for LED, current sink, communication, and device.

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