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TLC5925IDBQR

TLC5925IDBQR

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    SSOP24

  • 描述:

    IC LED DRIVER LINEAR 45MA 24SSOP

  • 数据手册
  • 价格&库存
TLC5925IDBQR 数据手册
Product Folder Sample & Buy Support & Community Tools & Software Technical Documents TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 TLC5925 Low-Power 16-Channel Constant-Current LED Sink Driver 1 Features 3 Description • • The TLC5925 is designed for LED displays and LED lighting applications. The TLC5925 contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. At the TLC5925 output stage, 16 regulated-current ports provide uniform and constant current for driving LEDs within a wide range of VF variations. Used in system design for LED display applications (such as, LED panels), the TLC5925 provides great flexibility and device performance. Users can adjust the output current from 3 mA to 45 mA through an external resistor, Rext, which gives flexibility in controlling the light intensity of LEDs. TLC5925 is designed for up to 17 V at the output port. The high clock frequency, 30 MHz, also satisfies the system requirements of highvolume data transmission. 1 • • • • • • • • • 16 Constant-Current Output Channels Constant Output Current Invariant to Load Voltage Change Excellent Output Current Accuracy: – Between Channels: < ±4% (Max) – Between ICs: < ±6% (Max) Constant Output Current Range: 3 mA to 45 mA Output Current Adjusted By External Resistor Fast Response of Output Current, OE (Min): 100 ns 30-MHz Clock Frequency Schmitt-Trigger Inputs 3.3-V to 5-V Supply Voltage Thermal Shutdown for Overtemperature Protection ESD Performance: 1-kV HBM The serial data is transferred into TLC5925 via SDI, shifted in the shift register, and transferred out via SDO. LE can latch the serial data in the shift register to the output latch. OE enables the output drivers to sink current. 2 Applications • • • • • Gaming Machine and Entertainment General LED Applications LED Display Systems Signs LED Lighting White Goods Device Information PART NUMBER TLC5925 (1) PACKAGE BODY SIZE (NOM) SSOP (24) 8.65 mm × 3.90 mm SOIC (24) 15.40 mm × 7.50 mm TSSOP (24) 7.80 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Typical Application 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. TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com Table of Contents 1 2 3 4 5 6 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 7 1 1 1 2 3 4 Absolute Maximum Ratings ...................................... 4 ESD Ratings.............................................................. 4 Recommended Operating Conditions....................... 4 Thermal Information .................................................. 5 Electrical Characteristics: VDD = 3 V......................... 5 Electrical Characteristics: VDD = 5.5 V..................... 6 Power Dissipation and Thermal Impedance ............. 6 Timing Requirements ................................................ 7 Switching Characteristics: VDD = 3 V........................ 7 Switching Characteristics: VDD = 5.5 V................... 8 Typical Characteristics ............................................ 9 Parameter Measurement Information ................ 10 8 Detailed Description ............................................ 12 8.1 8.2 8.3 8.4 9 Overview ................................................................. Functional Block Diagram ....................................... Feature Description................................................. Device Functional Modes........................................ 12 12 12 13 Application and Implementation ........................ 14 9.1 Application Information............................................ 14 9.2 Typical Application ................................................. 15 10 Power Supply Recommendations ..................... 16 11 Layout................................................................... 16 11.1 Layout Guidelines ................................................. 16 11.2 Layout Example .................................................... 17 12 Device and Documentation Support ................. 18 12.1 12.2 12.3 12.4 Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 18 18 18 18 13 Mechanical, Packaging, and Orderable Information ........................................................... 18 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (March 2013) to Revision B • 2 Page Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 5 Pin Configuration and Functions DBQ, DW, or PWP Package 24-Pin SSOP, SOIC, or TSSOP Top View GND 1 24 VDD SDI 2 23 R-EXT CLK 3 22 SDO LE 4 21 OE OUT0 5 20 OUT15 OUT1 6 19 OUT14 OUT2 7 18 OUT13 OUT3 8 17 OUT12 OUT4 9 16 OUT11 OUT5 10 15 OUT10 OUT6 11 14 OUT9 OUT7 12 13 OUT8 Pin Functions PIN NAME NO. I/O DESCRIPTION CLK 3 I Clock input for data shift on rising edge GND 1 — Ground for control logic and current sink LE 4 I Data strobe input Serial data is transferred to the respective latch when LE is high. The data is latched when LE goes low. LE has an internal pull-down resistor. OE 21 I Output enable When OE is active (low), the output drivers are enabled. When OE is high, all output drivers are turned OFF (blanked). OE has an internal pullup resistor. OUT0 5 OUT1 6 OUT2 7 OUT3 8 O Constant-current outputs OUT4 9 OUT5 10 OUT6 11 OUT7 12 OUT8 13 OUT9 14 OUT10 15 OUT11 16 OUT12 17 OUT13 18 OUT14 19 OUT15 20 R-EXT 23 I Input used to connect an external resistor (Rext) for setting output currents SDI 2 I Serial-data input to the Shift register SDO 22 O Serial-data output to the following SDI of next driver IC or to the microcontroller VDD 24 I Supply voltage Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 3 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX 0 7 V Input voltage –0.4 VDD + 0.4 V Output voltage –0.5 20 V 45 mA 750 mA 125 °C –40 150 °C –55 150 °C VDD Supply voltage VI VO IOUT Output current IGND GND terminal current TA Free-air operating temperature range –40 TJ Operating junction temperature range Tstg Storage temperature range (1) UNIT Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 6.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) UNIT ±1000 Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) V ±500 JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) VDD Supply voltage VO Output voltage MIN MAX 3 5.5 V 17 V OUT0 to OUT15 VO ≥ 0.6 V 3 UNIT IO Output current DC test circuit IOH High-level output current SDO IOL Low-level output current SDO VIH High-level input voltage CLK, OE, LE, and SDI 0.7 × VDD VDD V VIL Low-level input voltage CLK, OE, LE, and SDI GND 0.3 × VDD V tR Rise Time CLK 500 ns tF Fall Time CLK 500 ns 4 VO ≥ 1 V 45 –1 mA 1 Submit Documentation Feedback mA mA Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 6.4 Thermal Information TLC5925 DBQ (SSOP) DW (SOIC) PW (TSSOP) 24 PINS 24 PINS 24 PINS Mounted on JEDEC 1-layer board (JESD 51-3), No airflow 99.8 80.5 118.8 °C/W Mounted on JEDEC 4-layer board (JESD 51-7), No airflow 61 45.5 87.9 °C/W RθJC(top) Junction-to-case (top) thermal resistance 52.9 45.0 44.9 °C/W RθJB Junction-to-board thermal resistance 41.5 44.8 52.9 °C/W ψJT Junction-to-top characterization parameter 16.4 21.7 6.7 °C/W ψJB Junction-to-board characterization parameter 41.2 44.4 52.5 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance n/a n/a n/a °C/W THERMAL METRIC RθJA (1) Junction-toambient thermal resistance (1) UNIT For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 6.5 Electrical Characteristics: VDD = 3 V VDD = 3 V, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP UNIT Input voltage VO Output voltage IO Output current IOH High-level output current, source IOL Low-level output current, sink VIH High-level input voltage 0.7 × VDD VDD VIL Low-level input voltage GND 0.3 × VDD Ileak Output leakage current VOH = 17 V VOH High-level output voltage SDO, IOL = –1 mA VOL Low-level output voltage SDO, IOH = 1 mA Output current 1 VOUT = 0.6 V, Rext = 1680 Ω Output current error, die-die IOL = 13 mA, VO = 0.6 V, Rext = 1680 Ω, TJ = 25°C ±3% ±6% Output current error, channel-tochannel IOL = 13 mA, VO = 0.6 V, Rext = 1680 Ω, TJ = 25°C ±1.5% ±4% Output current 2 VO = 0.8 V, Rext = 840 Ω Output current error, die-die IOL = 26 mA, VO = 0.8 V, Rext = 840 Ω, TJ = 25°C ±3% ±6% Output current error, channel-tochannel IOL = 26 mA, VO = 0.8 V, Rext = 840 Ω, TJ = 25°C ±1.5% ±4% Output current vs output voltage regulation VO = 1 V to 3 V, IO = 13 mA Pullup resistance OE 500 kΩ Pulldown resistance LE 500 kΩ IO(1) IO(2) IOUT vs VOUT 3 MAX VDD VO ≥ 0.6 V -1 Restart temperature hysteresis TJ = 25°C TJ = 125°C CIN (1) Supply current Input capacitance 2 VDD – 0.4 13 μA 26 mA ±0.1 %/V ±1 175 V mA 200 °C °C 7 10 Rext = 1680 Ω 9 12 Rext = 840 Ω 11 13 VI = VDD or GND, CLK, SDI, SDO, OE V V 0.4 15 Rext = Open IDD 0.5 150 mA mA 1 (1) Overtemperature shutdown V 45 VDD = 3.0 V to 5.5 V, IO = 13 mA to 45 mA Thys V 17 3 VO ≥ 1 V Tsd 5.5 10 mA pF Specified by design Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 5 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 6.6 www.ti.com Electrical Characteristics: VDD = 5.5 V VDD = 5.5 V, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER VDD Input voltage VO Output voltage TEST CONDITIONS MIN TYP 3 VO ≥ 0.6 V MAX 5.5 V 17 V 3 IO Output current IOH High-level output current, source IOL Low-level output current, sink VIH High-level input voltage 0.7 × VDD VDD VIL Low-level input voltage GND 03 × VDD Ileak Output leakage current VOH = 17 V VOH High-level output voltage SDO, IOL = –1 mA VOL Low-level output voltage SDO, IOH = 1 mA Output current 1 VOUT = 0.6 V, Rext = 1680 Ω Output current error, die-die IOL = 13 mA, VO = 0.6 V, Rext = 1680 Ω, TJ = 25°C ±3$ ±6$ Output current error, channel-tochannel IOL = 13 mA, VO = 0.6 V, Rext = 1680 Ω, TJ = 25°C ±1.5$ ±4$ Output current 2 VO = 0.8 V, Rext = 840 Ω Output current error, die-die IOL = 26 mA, VO = 0.8 V, Rext = 840 Ω, TJ = 25°C ±3% ±6% Output current error, channel-tochannel IOL = 26 mA, VO = 0.8 V, Rext = 840 Ω, TJ = 25°C ±1.5% ±4% Output current vs output voltage regulation VO = 1 V to 3 V , IO = 26 mA Pullup resistance OE 500 Pulldown resistance LE 500 IO(1) IO(2) IOUT vs VOUT VO ≥ 1 V 45 -1 TJ = 25°C 0.5 TJ = 125°C 2 VDD – 0.4 Overtemperature shutdown 13 Thys Restart temperature hysteresis IDD Supply current CIN (1) Input capacitance %/V ±1 175 kΩ kΩ 200 15 °C °C 9 11 Rext = 1680 Ω 12 14 Rext = 840 Ω 14 16 VI = VDD or GND, CLK, SDI, SDO, OE V mA ±0.1 Rext = Open μA mA 26 150 V V 0.4 (1) Tsd mA mA 1 VDD = 3.0 V to 5.5 V, IO = 13 mA to 45 mA UNIT 10 mA pF Specified by design 6.7 Power Dissipation and Thermal Impedance MIN PD 6 Power dissipation Mounted on JEDEC 4-layer board (JESD 51-7), No airflow, TA = 25°C, TJ = 125°C Submit Documentation Feedback MAX DBQ package 1.6 DW package 2.2 PW package 1.1 UNIT W Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 6.8 Timing Requirements VDD = 3 V to 5.5 V (unless otherwise noted) MIN MAX UNIT tw(L) LE pulse duration 15 ns tw(CLK) CLK pulse duration 15 ns tw(OE) OE pulse duration 300 ns tsu(D) Setup time for SDI 3 ns th(D) Hold time for SDI 2 ns tsu(L) Setup time for LE 5 ns th(L) Hold time for LE 5 ns fCLK Clock frequency, Cascade operation 30 MHz 6.9 Switching Characteristics: VDD = 3 V VDD = 3 V, TJ = –40°C to 125°C (unless otherwise noted) MIN TYP MAX tPLH1 Low-to-high propagation delay time, CLK to OUTn PARAMETER TEST CONDITIONS 30 45 60 UNIT ns tPLH2 Low-to-high propagation delay time, LE to OUTn 30 45 60 ns tPLH3 Low-to-high propagation delay time, OE to OUTn 30 45 60 ns tPLH4 Low-to-high propagation delay time, CLK to SDO 30 40 ns tPHL1 High-to-low propagation delay time, CLK to OUTn 40 65 100 ns tPHL2 High-to-low propagation delay time, LE to OUTn 40 65 100 ns tPHL3 High-to-low propagation delay time, OE to OUTn 40 65 100 ns tPHL4 High-to-low propagation delay time, CLK to SDO 30 40 ns tw(CLK) Pulse duration, CLK tw(L) Pulse duration LE tw(OE) Pulse duration, OE th(D) tsu(D) 15 ns 15 ns 300 ns Hold time, SDI 2 ns Setup time, SDI 3 ns th(L) Hold time, LE 5 ns tsu(L) Setup time, LE tr Rise time, CLK tf Fall time, CLK tor Rise time, outputs (off) 35 tof Rise time, outputs (on) 15 fCLK Clock frequency (1) VIH = VDD, VIL = GND, Rext = 840 Ω, VL = 4 V, RL = 88 Ω, CL = 10 pF 5 ns (1) 500 ns 500 ns 50 70 ns 50 120 ns 30 MHz (1) Cascade operation If the devices are connected in cascade and tr or tf is large, it may be critical to achieve the timing required for data transfer between two cascaded devices. Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 7 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 6.10 Switching Characteristics: VDD = 5.5 V VDD = 5.5 V, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH1 Low-to-high propagation delay time, CLK to OUTn 20 35 55 ns tPLH2 Low-to-high propagation delay time, LE to OUTn 20 35 55 ns tPLH3 Low-to-high propagation delay time, OE to OUTn 20 35 55 ns tPLH4 Low-to-high propagation delay time, CLK to SDO 20 30 ns tPHL1 High-to-low propagation delay time, CLK to OUTn 15 28 42 ns tPHL2 High-to-low propagation delay time, LE to OUTn 15 28 42 ns tPHL3 High-to-low propagation delay time, OE to OUTn 15 28 42 ns tPHL4 High-to-low propagation delay time, CLK to SDO 20 30 ns tw(CLK) Pulse duration, CLK tw(L) Pulse duration LE tw(OE) Pulse duration, OE th(D) Hold time, SDI tsu(D) 10 ns 10 ns 200 ns 2 ns Setup time, SDI 3 ns th(L) Hold time, LE 5 ns tsu(L) Setup time, LE tr Rise time, CLK tf Fall time, CLK tor Rise time, outputs (off) 25 tof Rise time, outputs (on) 7 fCLK Clock frequency (1) 8 VIH = VDD, VIL = GND, Rext = 840 Ω, VL = 4 V, RL = 88 Ω, CL = 10 pF 5 ns (1) 500 ns 500 ns 45 65 ns 12 20 ns 30 MHz (1) Cascade operation If the devices are connected in cascade and tr or tf is large, it may be critical to achieve the timing required for data transfer between two cascaded devices. Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CLK OE 1 LE 0 SDI off OUT0 on off OUT1 on off OUT2 on off OUT3 on off OUT15 on SDO Don't care Figure 1. Timing Diagram 6.11 Typical Characteristics 50 Temperature = 25°C IO = 45 mA IO = 38 mA Output Current (mA) 40 IO = 31 mA 30 IO = 24 mA 20 IO = 17 mA IO = 10 mA 10 IO = 3 mA 0 0 0.5 1 1.5 2 2.5 3 Output Voltage (V) Figure 2. Output Current vs Output Voltage Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 9 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 7 Parameter Measurement Information IDD VDD OE IIH, IIL IOUT OUT0 CLK LE OUT15 SDI VIH, VIL R-EXT GND SDO Iref Figure 3. Test Circuit for Electrical Characteristics IDD IOUT VDD VIH, VIL OE CLK LE Function Generator OUT0 OUT15 RL CL SDI Logic input waveform VIH = VDD VIL = 0V R-EXT GND SDO Iref CL VL Figure 4. Test Circuit for Switching Characteristics 10 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 Parameter Measurement Information (continued) tw(CLK) CLK 50% tsu(D) SDI 50% 50% th(D) 50% 50% tPLH4, tPHL4 50% SDO tw(L) 50% LE tsu(L) th(L) OE Low OE LOW tPLH2, tPHL2 Output off OUTn 50% Output on tPLH1, tPHL1 tw(OE) HIGH 50% OE Pulsed OE 50% tPLH3 tPHL3 Output off 90% OUTn 90% 50% 50% 10% tof 10% tor Figure 5. Normal Mode Timing Waveforms Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 11 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 8 Detailed Description 8.1 Overview The TLC5925 is a 16-channel LED driver designed for LED displays and LED lighting applications. The TLC5925 contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. At the TLC5925 output stage, 16 regulated-current ports provide uniform and constant current for driving LEDs within a wide range of VF variations. Used in system design for LED display applications (for example, LED panels), the TLC5925 provides great flexibility and device performance. Users can adjust the output current from 3 mA to 45 mA through an external resistor, REXT, which gives flexibility in controlling the light intensity of LEDs. TLC59025 is designed for up to 17 V at the output port. The high clock frequency, 30 MHz, also satisfies the system requirements of high-volume data transmission. 8.2 Functional Block Diagram OUT0 R-EXT OUT1 OUT14 OUT15 I/O REGULATOR VDD 8 OUTPUT DRIVER OE CONTROL LOGIC 16 16 16-BIT OUTPUT LATCH LE CONFIGURATION LATCHES 16 CLK 8 SDI 16-BIT SHIFT REGISTER SDO 16 8.3 Feature Description 8.3.1 Constant Current In LED display applications, TLC5925 provides nearly no current variations from channel to channel and from IC to IC. While IOUT ≤ 45 mA, the maximum current skew between channels is less than ±5% and between ICs is less than ±6%. 12 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 8.4 Device Functional Modes The table below lists the functional modes for the TLC5925. Table 1. Truth Table in Normal Operation CLK LE OE SDI OUT0...OUT15...OUT15 SDO ↑ H L Dn Dn...Dn – 7...Dn – 15 Dn – 15 ↑ L L Dn + 1 No change Dn – 14 ↑ H L Dn + 2 Dn + 2...Dn – 5...Dn – 13 Dn – 13 ↓ X L Dn + 3 Dn + 2...Dn – 5...Dn – 13 Dn – 13 ↓ X H Dn + 3 off Dn – 13 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 13 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information 9.1.1 Turning on the LEDs To turn on an LED connected to one of the outputs of the device, the output must be pulled low. To do this, the SDI signal must let the device know which outputs should be activated. Using the rising edge of CLK, the logic level of the SDI signal latches the desired state of each output into the shift register. Once this is complete, the LE signal must be toggled from low to high then back to low. Once /OE is pulled down, the corresponding outputs will be pulled low and the LEDs will be turned on. The below diagram shows outputs 0, 3, 4, 5, 10, 13, and 15 being activated. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CLK OE 1 LE 0 SDI off OUT0 on off OUT1 on off OUT2 on off OUT3 on off OUT15 on SDO Don't care Figure 6. Timing Diagram 14 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 Application Information (continued) 9.1.2 Propagation Delay Times Figure 7. CLK to OUT7 Figure 8. OE to OUT1 Figure 9. OE to OUT7 9.2 Typical Application Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 15 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com Typical Application (continued) 9.2.1 Design Requirements For the following design procedure, the input voltage (VDD) is between 3 V and 5.5 V. 9.2.2 Detailed Design Procedure 9.2.2.1 Adjusting Output Current TLC5925 sets IOUT based on the external resistor Rext. Users can follow the below formulas to calculate the target output current IOUT,target in the saturation region: IOUT,target = (1.21 V / Rext) × 18, where Rext is the external resistance connected between R-EXT and GND. Therefore, the default current is approximately 26 mA at 840 Ω and 13 mA at 1680 Ω. 9.2.3 Application Curve IOUT – mA The default relationship after power on between IOUT,target and Rext is shown in Figure 10. 45 40 35 30 25 20 15 10 5 0 0 500 1000 1500 2000 Rext – 8W 2500 3000 3500 4000 Figure 10. Default Relationship Curve Between IOUT,target and Rext After Power Up 10 Power Supply Recommendations The TLC5925 is designed to operate with a VDD range between 3 V and 5.5 V. 11 Layout 11.1 Layout Guidelines The SDI, CLK, SDO, LE, and OE signals should all be kept from potential noise sources. All traces carrying power through the LEDs should be wide enough to handle necessary currents. All LED current passes through the device and into the ground node. There must be a strong connection between the device ground and the circuit board ground. 16 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 TLC5925 www.ti.com SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 11.2 Layout Example Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 17 TLC5925 SLVS765B – OCTOBER 2008 – REVISED SEPTEMBER 2015 www.ti.com 12 Device and Documentation Support 12.1 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.2 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.3 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 18 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TLC5925 PACKAGE OPTION ADDENDUM www.ti.com 13-Aug-2021 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) TLC5925IDBQR ACTIVE SSOP DBQ 24 2500 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 125 TLC5925I TLC5925IDWR ACTIVE SOIC DW 24 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 TLC5925I TLC5925IDWRG4 ACTIVE SOIC DW 24 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 TLC5925I TLC5925IPWR ACTIVE TSSOP PW 24 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 Y5925 TLC5925IPWRG4 ACTIVE TSSOP PW 24 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 Y5925 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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