1FEATURES

23• 16 Constant-Current Sink Output Channels

with On/Off Control

• Current Capability:

– 40 mA (VCC ≤ 3.6 V)

– 50 mA (V CC > 3.6 V)

• Global Brightness Control: 7-Bit (128 Steps)

• Power-Supply Voltage Range: 3.0 V to 5.5 V

• LED Power-Supply Voltage: Up to 10 V

• Constant-Current Accuracy:

– Channel-to-Channel = ±1% (typ), ±3% (max)

– Device-to-Device = ±2% (typ), ±4% (max)

• Data Transfer Rate: 33 MHz

• BLANK Pulse Width: 40 ns (min)

• 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

APPLICATIONS

• Variable Message Signs (VMS)

• Illumination

DESCRIPTION

The TLC5929 is a 16-channel constant current sink

LED driver. Each channel can be turned on or off by

writing data to an internal register. The constant

current value of all 16 channels is set by a single

external resistor with 128 steps for the global

brightness control (BC).

The TLC5929 has six error flags: LED open detection

(LOD), LED short detection (LSD), output leakage

detection (OLD), reference current 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 TLC5929 also has a power-save mode that sets

the total current consumption to 10 μA (typ) when all

outputs are off.