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LED1642GW Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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LED1642GW Scheda tecnica(HTML) 1 Page - STMicroelectronics |
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1 / 42 page  This is information on a product in full production. November 2015 DocID024395 Rev 6 1/42 LED1642GW 16 channel LED driver with error detection current gain control and 12/16-bit PWM brightness control Datasheet - production data Features • 16 constant current output channels • Output current: from 3 mA to 40 mA • Current programmable through external resistor • 7-bit global current gain adjustment in two ranges • 12/16-bit PWM grayscale brightness control • Programmable output turn-on/off time • Error detection mode (both open and shorted- LED) • Programmable shorted-LED detection thresholds • Auto power saving/auto-wakeup • Selectable SDO synchronization on the CLK falling edge • Gradual output delay (selectable) • Supply voltage: 3 V to 5.5 V • Thermal shutdown and overtemperature alert • 30 MHz 4-wires interface • 20 V current generator rated voltage Applications • Full color/monochrome large displays • LED signage Description The LED1642GW is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The LED1642GW guarantees 20 V output driving capability allowing the user to connect several LEDs in series. In the output stage, sixteen regulated current sources provide from 3 mA to 40 mA constant current to drive the LEDs. The current is programmed through an external resistor and can be adjusted by a 7-bit current gain register in two subranges. The brightness can be adjusted separately for each channel through 12/16-bit grayscale control. Programmable turn-on and turn-off time (four different values available) improves the low noise generation performance of the system. Open/short error detection mode is available in the LED1642GW. The auto power-shutdown and auto power-on features (selectable) allow the device to save power without external intervention. Thermal management includes an overtemperature data alert and output thermal shutdown (170 °C). The high clock frequency is up to 30 MHz and it makes the device suitable for high data rate transmission. A selectable gradual output delay reduces the inrush current, whereas the selectable SDO synchronization feature works when the device is used in daisy-chain configuration. The supply voltage range is between 3 V and 5.5 V. TSSOP24 TSSOP24 (exposed pad) QSOP-24 www.st.com |
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