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TLC5970RHPR Datasheet(PDF) 1 Page - Texas Instruments |
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TLC5970RHPR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 48 page  GND SWOFF VREG VREGIF IREF2 IREF1 IREF0 VROM SDTA SDTB SCKA SCKB VCC PH BOOT FB OUT2 OUT1 OUT0 SDTY SDTZ SCKY SCKZ TLC5970 0.01 F m 0.01 F m 0.1 F m Open GND SWOFF VREG VREGIF IREF2 IREF1 IREF0 VROM SDTA SDTB SCKA SCKB VCC PH BOOT FB OUT2 OUT1 OUT0 SDTY SDTZ SCKY SCKZ TLC5970 0.01 F m 0.01 F m 0.1 F m Open VCC GND Power Supply SDTY SDTZ SDKY SDKZ Controller TLC5970 www.ti.com SBVS140 – MARCH 2010 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converter and Differential Signal Interface Check for Samples: TLC5970 1 FEATURES APPLICATIONS • Full-Color Static LED Displays for Building 23 • 3-Channel, Constant-Current Sink Output Wall • Current Capability: 150 mA per channel • Long Distance and Large Area Illumination • Grayscale (GS) Control with PWM: 12-bit (4096 steps) DESCRIPTION • Dot Correction (DC): 7-bit (128 steps) The TLC5970 is a three-channel, constant-current • Global Brightness Control (BC): sink driver with a buck dc/dc converter and a 7-bit (128 steps) differential signal interface. Each channel has • EEPROM for Dot Correction Storage individually adjustable currents with 4096 PWM grayscale (GS) steps and 128 constant-current sink • Input Voltage: Up to 36 V steps for dot correction (DC). The dot correction • LED Supply Voltage: Up to 17 V with Auto LED adjusts the brightness variations between LEDs. The Anode Voltage Control DC data can be stored in the internal EEPROM. Also, • Constant-Current Accuracy: current through all three channels can be controlled by global brightness control (BC) data with 128 steps. – Channel-to-Channel = ±0.5% (typ) GS control, DC, and BC are accessible via a – Device-to-Device = ±3% (typ) differential signal interface. The maximum current • Data Transfer Rate: 20 MHz value for each channel is set by a single external resistor. The TLC5970 contains a dc/dc buck • Differential Signal Interface for Long Distance converter. The dc/dc converter improves system Cascading efficiency, reduces system level currents, and allows • Unlimited Device Cascading thinner gauge wiring by optimizing the LED anode • Auto Display Repeat/Auto Data Refresh voltage to keep the LED cathode voltage to 1 V. The TLC5970 proivdes overtemperature protection by • Internal/External Selectable GS Clock turning all output drivers off when the IC temperature • Thermal Shutdown (TSD) is too high (exceeds +138°C). • Packages: HTSSOP-32 and QFN-28 Typical Application Circuit Example 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 PowerPAD is a trademark of Texas Instruments Incorporated. 3 All other trademarks are the property of their respective owners. UNLESS OTHERWISE NOTED this document contains Copyright © 2010, Texas Instruments Incorporated PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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