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TLC5957RTQR Datasheet(PDF) 1 Page - Texas Instruments |
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TLC5957RTQR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page X 48 COM n COM 1 COM 0 SW COM 1 VLED SW COM 0 SW COM n VLED VLED OUTR0 GCLK FLAGS READ LAT SCLK DATA Controller 3 ICn IC1 TLC5957 TLC5957 SIN SCLK LAT GCLK IREF GND OUTR0 OUTB15 SOUT Thermal Pad VCC GND IREFGND SIN SCLK LAT GCLK GND IREFGND IREF OUTB15 SOUT Thermal Pad VCC V CC GND X 48 V CC Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TLC5957 SLVSCQ4 – OCTOBER 2014 TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling 1 Features 2 Applications 1 • 48 Constant-Current Sink Output Channels • LED Video Displays • Sink Current Capability with Max BC/CC data • LED Signboards – 1~20mA (VCC = 3.3V) 3 Description – 1~25mA (VCC = 5V) The TLC5957 is a 48-channel constant current sink • Global Brightness Control (BC): 3-Bit (8 Step) driver. Each channel has an individually-adjustable, • Global Brightness Control (CC) for Each Color 65536-step, pulse width modulation (PWM) grayscale Group: 9-Bit (512 Step), Three Groups (GS) brightness control. • LED Power Supply Voltage up to 10V The output channels are divided into three groups, • VCC = 3.0 to 5.5V each group has a 512 step color brightness control (CC), CC adjusts brightness between colors. The • Knee Voltage Vout = 0.24V at 10mA maximum current value of all 48 channels can be set • Constant Current Accuracy by 8-step global brightness control (BC). BC adjusts – Channel to Channel = ±1%(Typ), ±3%(Max) brightness deviation between LED drivers. GS, CC and BC data are accessible via a serial interface port. – Device to Device = ±1%(Typ), ±2%(Max) • Data Transfer Rate : 33MHz TLC5957 has one error flag: LED open detection (LOD), which can be read via a serial interface port. • Grayscale Control Clock : 33MHz Each constant-current has a pre-charge field- effect • Pre-charge FET for Ghost Cancelling transistor (FET), which can remove ghosting and • Enhanced Circuit for Caterpillar Cancelling improve display performance on the multiplexing LED display. Besides, TLC5957 has an enhanced circuit, it • Selectable Data Transfer Bit and PWM Bit (9 bit to can cancel the caterpillar effect caused by LED open. 16 bit) • Selectable Traditional PWM and ES-PWM TLC5957 has a poker data transmission mode; GS data length can be configured from 9 bit to 16 bit • LED Open Detection (LOD) according to PWM bits in each sub-segment. Poker • Thermal Shut Down (TSD) Mode can significantly increase visual refresh rate in • Auto Display Repeat/Auto Data Refresh multiplexing applications. • Delay Switching to Prevent Inrush Current Device Information(1) • Operating Temperature : –40°C to +85°C PART NUMBER PACKAGE BODY SIZE (NOM) TLC5957 QFN (56) 8.0 mm × 8.0 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. 4 Typical Application Circuit (Multiple Daisy Chained TLC5957s) 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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