Ver2.1

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LD1024

16-Channel, Constant-Current LED Driver with LED Open Detection

DESCRIPTION

The LD1024 is a 16-channel, constant current sink LED driver. Each channel can be turned on/off by writing serial

data to an internal register. The constant current value of all 16 channels is set by a single external resistor.

The LD1024 has two error detection circuits: one for LED open detection (LOD) and one for a pre-thermal

warning (PTW). LOD detects a broken or disconnected LED and LEDs shorted to GND while the constant current

output is on. PTW indicates a high temperature condition.

FEATURES

• 16 Channels, Constant Current Sink Output with On/Off Control

 45-mA Capability (Constant Current Sink)

 10-ns High-Speed Constant Current Switching Transient Time

• Low On-Time Error

• LED Power-Supply Voltage up to 5V

• VDD = 3.0 V to 5.5 V

• Constant Current Accuracy:.

- Pin to Pin Deviation Typ ±1.0%, Min/Max ± 3.0%

- Chip to Chip Deviation Typ ±3.0%, Min ± 6.0%

• CMOS Logic Level I/O

 35-MHz Data Transfer Rate

• 20-ns OEB Pulse Width

• Readable Error Information:

• LED Open Detection (LOD)

• Pre-Thermal Warning (PTW)

• Operating Temperature: –40°C to +85°C

PART NUMBER

PACKAGE

Ta

LD1024-SS

24 SSOP

-40°C to 85 °C

ORDERING INFORMATION