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TLC5944 Datasheet(PDF) 2 Page - Texas Instruments |
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TLC5944 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 38 page DESCRIPTION ABSOLUTE MAXIMUM RATINGS (1) (2) TLC5944 SBVS112A – JUNE 2008 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor. The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set. blank This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION(1) TRANSPORT MEDIA, PRODUCT PACKAGE-LEAD ORDERING NUMBER QUANTITY TLC5944PWPR Tape and Reel, 2000 TLC5944 HTSSOP-28 PowerPAD™ TLC5944PWP Tube, 50 TLC5944RHBR Tape and Reel, 3000 TLC5944 5 mm × 5 mm QFN-32 TLC5944RHBT Tape and Reel, 250 (1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Over operating free-air temperature range, unless otherwise noted. PARAMETER TLC5944 UNIT VCC Supply voltage, VCC –0.3 to +6.0 V VUP Pre-charge voltage –0.3 to +16 V XERR 6 mA IOUT Output current (dc) OUT0 to OUT15 70 mA Input voltage range: VIN –0.3 to VCC + 0.3 V SIN, SCLK, XLAT, BLANK, GSCLK, DCSEL, IREF SOUT, XERR –0.3 to VCC + 0.3 V VOUT Output voltage range OUT0 to OUT15 –0.3 to VUP + 0.3 V TJ(max) Operating junction temperature +150 °C TSTG Storage temperature range –55 to +150 °C Human body model (HBM) 2 kV ESD rating Charged device model (CDM) 500 V (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported. (2) All voltage values are with respect to network ground terminal. 2 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s): TLC5944 |
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