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Drivers para pantallas LED

TLC59291

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Controlador LED de corriente constante de 8/16 canales con corriente quiescente baja y autodiagnósti

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TLC59291

ACTIVO
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Detalles del producto

Features Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, ON/OFF LED Driver, Power good, Thermal shutdown Analog dimming steps 128 Data transfer rate (typ) (MHz) 33 Ch to ch accuracy (typ) (±%) 1 Rating Catalog Operating temperature range (°C) -40 to 85
Features Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, ON/OFF LED Driver, Power good, Thermal shutdown Analog dimming steps 128 Data transfer rate (typ) (MHz) 33 Ch to ch accuracy (typ) (±%) 1 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGE) 24 16 mm² 4 x 4
  • 8/16 Constant-Current Sink Output Channels with
    On/Off Control
  • Current Capability:
    • 1 – 40 mA (VCC ≤ 3.6 V)
    • 1 – 50 mA (VCC > 3.6 V)
  • Global Brightness Control: 7-Bit (128 Steps)
  • Power-Supply Voltage Range: 3 V to 5.5 V
  • LED Power-Supply Voltage: Up to 10 V
  • Constant-Current Accuracy:
    • Channel-to-Channel = ±3% (Typical)
    • Device-to-Device = ±2% (Typical)
  • Low Quiescent Current
  • SOUT can be Configured for 8-Channel or 16-
    Channel Output
  • LED Open Detection (LOD)/LED Short Detection
    (LSD) with Invisible Detection Mode (IDM)
  • Output Leakage Detection (OLD) Detects 3 µA
    Leak
  • Pre-Thermal Warning (PTW)
  • Thermal Shutdown (TSD)
  • Current Reference Terminal Short Flag (ISF)
  • Power-Save Mode with 10-µA Consumption
  • Undervoltage Lockout Sets the Default Data
  • 2-ns Delayed Switching Between Each Channel
    Minimizes Inrush Current
  • Operating Temperature: –40°C to 85°C
  • 8/16 Constant-Current Sink Output Channels with
    On/Off Control
  • Current Capability:
    • 1 – 40 mA (VCC ≤ 3.6 V)
    • 1 – 50 mA (VCC > 3.6 V)
  • Global Brightness Control: 7-Bit (128 Steps)
  • Power-Supply Voltage Range: 3 V to 5.5 V
  • LED Power-Supply Voltage: Up to 10 V
  • Constant-Current Accuracy:
    • Channel-to-Channel = ±3% (Typical)
    • Device-to-Device = ±2% (Typical)
  • Low Quiescent Current
  • SOUT can be Configured for 8-Channel or 16-
    Channel Output
  • LED Open Detection (LOD)/LED Short Detection
    (LSD) with Invisible Detection Mode (IDM)
  • Output Leakage Detection (OLD) Detects 3 µA
    Leak
  • Pre-Thermal Warning (PTW)
  • Thermal Shutdown (TSD)
  • Current Reference Terminal Short Flag (ISF)
  • Power-Save Mode with 10-µA Consumption
  • Undervoltage Lockout Sets the Default Data
  • 2-ns Delayed Switching Between Each Channel
    Minimizes Inrush Current
  • Operating Temperature: –40°C to 85°C

The TLC59291 is a 8/16-channel constant current sink LED driver. Each channel can be turned on-off by writing data to an internal register. The constant current value of all 16 channels is set by a single external resistor and 128 steps for the global brightness control (BC).

The TLC59291 has six type error flags: LED open detection (LOD), LED short detection (LSD), output leak detection (OLD), reference terminal short detection (ISF), Pre thermal warning (PTW) and thermal error flag (TEF). In addition, the LOD and LSD functions have invisible detection mode (IDM) that can detect those errors even when the output is off. The error detection results can be read via a serial interface port.

The TLC59291 has low quiescent current in normal mode, it also has a power-save mode that sets the total current consumption to 10 µA (typical) when all outputs are off.

The TLC59291 is a 8/16-channel constant current sink LED driver. Each channel can be turned on-off by writing data to an internal register. The constant current value of all 16 channels is set by a single external resistor and 128 steps for the global brightness control (BC).

The TLC59291 has six type error flags: LED open detection (LOD), LED short detection (LSD), output leak detection (OLD), reference terminal short detection (ISF), Pre thermal warning (PTW) and thermal error flag (TEF). In addition, the LOD and LSD functions have invisible detection mode (IDM) that can detect those errors even when the output is off. The error detection results can be read via a serial interface port.

The TLC59291 has low quiescent current in normal mode, it also has a power-save mode that sets the total current consumption to 10 µA (typical) when all outputs are off.
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* Data sheet TLC59291 8/16-Channel, Constant Current LED Driver with 7-bit Brightness Control Low Quiescent Current and Full Self Diagnosis for LED Lamp datasheet (Rev. A) PDF | HTML 03 mar 2016
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020

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