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LED2472G Datasheet(PDF) 1 Page - STMicroelectronics |
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LED2472G Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 39 page  This is information on a product in full production. April 2014 DocID024620 Rev 3 1/39 39 LED2472G 24-channels LED driver with error detection and gain control Datasheet - production data Features • 24 constant current output channels • Output current: from 4 mA to 72 mA • 8 x 3 independently controlled channels (RGB) • Current programmable through external resistor • 7-bit global current gain adjustment in two ranges • Error detection mode (both open and shorted LED) • Programmable shorted LED detection thresholds • Auto power-saving / auto wakeup • Gradual output delay (selectable) • Supply voltage: 3 V to 5.5 V • Thermal shutdown and thermal flag • Up to 30 MHz CLK 4 wires interface • 20 V current generators rated voltage Applications • Full color large displays • LED signage • LED screens for indoor and outdoor billboards Description The LED2472G is a monolithic, low voltage, low current power 24-bit shift register designed for LED panel displays with particular features oriented to indoor and outdoor LED screen billboards. The LED2472G guarantees 20 V of output driving capability, allowing several LEDs to be connected in series. The device is configured in 3 groups (red, green and blue) of 8 independently-controlled channels. The LED current can be separately regulated for each color within the range from 4 mA to 72 mA. This range is divided into two sub-ranges and the current can be adjusted within each range in 64 steps of resolution (6 bits per color). A single external resistor is required. All the controls and the shift register data are accessible via serial interface. A single 24-bit configuration register is used to choose features and settings to fit the application. The LED failure detection circuit checks 3 different conditions that can occur at the output line: short to GND, short to LED power supply rail or open channel. The auto power shutdown and auto power-on feature (selectable) allows the device to save power without any external intervention. Thermal management includes overtemperature flag and the output thermal shutdown (170 °C). The high clock frequency of up to 30 MHz makes the device suitable for high data rate transmission. A selectable gradual output delay reduces the inrush current. The supply voltage ranges from 3 V and 5.5 V. Table 1. Device summary Order code Package Packaging LED2472GBTR TQFP48-EP Tape and reel LED2472GQTR MLPQ40-EP 5x5 www.st.com |
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