LED2472GBTR STMicroelectronics

LED2472G 24-channels LED driver with error detection and gain control Datasheet - production data 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 74)3 (3 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 0/34 (3 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 Features resistor is required. All the controls and the shift register data are accessible via serial interface. A 24 constant current output channels single 24-bit configuration register is used to Output current: from 4 mA to 72 mA choose features and settings to fit the application. 8 x 3 independently controlled channels (RGB) The LED failure detection circuit checks 3 different conditions that can occur at the output Current programmable through external line: short to GND, short to LED power supply rail resistor or open channel. The auto power shutdown and 7-bit global current gain adjustment in two auto power-on feature (selectable) allows the ranges device to save power without any external Error detection mode (both open and shorted intervention. Thermal management includes LED) overtemperature flag and the output thermal shutdown (170 C). The high clock frequency of Programmable shorted LED detection up to 30 MHz makes the device suitable for high thresholds data rate transmission. A selectable gradual Auto power-saving / auto wakeup output delay reduces the inrush current. The Gradual output delay (selectable) supply voltage ranges from 3 V and 5.5 V. Supply voltage: 3 V to 5.5 V Thermal shutdown and thermal flag Table 1. Device summary Up to 30 MHz CLK 4 wires interface Order code Package Packaging 20 V current generators rated voltage LED2472GBTR TQFP48-EP Tape and reel LED2472GQTR MLPQ40-EP 5x5 Applications Full color large displays LED signage LED screens for indoor and outdoor billboards July 2021 DocID024620 Rev 5 1/39 This is information on a product in full production. www.st.com 39Contents LED2472G Contents 1 Pin description . 6 2 Absolute maximum ratings . 9 3 Thermal characteristics . 10 4 Electrical characteristics 11 4.1 Typical application circuit . 13 5 Switching characteristics 14 6 Timing 15 7 Simplified Internal block diagram . 16 7.1 Equivalent circuits of inputs and outputs . 17 8 Digital blocks 18 8.1 Register access 18 8.2 Configuration register 20 8.3 Current ranges (CFG 0-CFG 2) 21 8.4 Error detection conditions (CFG 3-CFG 5) 21 8.5 Auto power shutdown / wakeup (CFG 6) . 21 8.6 SDO delay (CFG 7) . 22 8.7 Gradual output delay (CFG 8) . 22 8.8 Data flow management (CFG 9-CFG 11) . 23 8.9 Gain register . 24 9 Current adjustment . 26 10 LED error detection . 28 11 Thermal shutdown and thermal alert 30 2/39 DocID024620 Rev 5