ZHCSIC6A June   2018  – January 2019 TLC6946 , TLC6948

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      T48 路多路复用 LC6948典型应用原理图
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Pin Equivalent Input and Output Schematic Diagrams
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Built-In 16Kb Display Memory (SRAM)
      2. 9.3.2  GCLK Dual-Edge Operation
      3. 9.3.3  Programmable Constant-Sink Channel Current
        1. 9.3.3.1 Global Brightness Control (BC)
        2. 9.3.3.2 Select RIREF for a Given BC
      4. 9.3.4  Grayscale (GS) Function (PWM Control)
      5. 9.3.5  Serial Data Interface
      6. 9.3.6  LED-Open Detection (LOD)
      7. 9.3.7  Caterpillar Removal
      8. 9.3.8  Precharge FET
      9. 9.3.9  Thermal Shutdown
      10. 9.3.10 IREF Resistor Short Protection (ISP)
    4. 9.4 Device Functional Modes
      1. 9.4.1 Normal Operating Mode
      2. 9.4.2 Power-Save Mode (PSM)
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedures
        1. 10.2.2.1 Power Supply Voltage
        2. 10.2.2.2 Channel Current and Brightness Control
        3. 10.2.2.3 SCLK and GCLK Frequency
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
  13. 13器件和文档支持
    1. 13.1 文档支持
      1. 13.1.1 相关文档
    2. 13.2 相关链接
    3. 13.3 接收文档更新通知
    4. 13.4 社区资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 术语表
  14. 14机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.5 Electrical Characteristics

VCC = 3 V to 5.5 V and TA = –40°C to 85°C; typical values are at VCC = VLED = 3.5 V, TA = 25°C, over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOH High-level output voltage IOH = –2 mA at SOUT VCC – 0.4 VCC V
VOL Low-level output voltage IOL = 2 mA at SOUT 0.4 V
VIREF Reference voltage BC = 00h, RIREF = 10.7 kΩ (IOUTn = 0.3-mA target) 0.8 V
V(LOD) LED open-detection threshold All OUTn = on, LODVTH = 00b 0.12 0.2 0.28 V
All OUTn = on, LODVTH = 01b 0.42 0.5 0.58 V
All OUTn = on, LODVTH = 10b 0.82 0.9 0.98 V
All OUTn = on, LODVTH = 11b 1.12 1.2 1.28 V
V(KNEE) Knee voltage (OUT0 to OUT15) All OUTn = on, BC = 36h, RIREF = 1.27 kΩ (IOUTn = 10-mA target) 0.3 V
ΔIOLC0 Constant-current error (channel-to-channel)(1) All OUTn = on, BC = 00h,VOUTn = 1 V, RIREF = 10.7 kΩ (IOUTn = 0.3-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±3.5%
ΔIOLC1 Constant-current error (device-to-device)(2) All OUTn = on, BC = 00h,VOUTn = 1 V, RIREF = 10.7 kΩ (IOUTn = 0.3-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2%
ΔIOLC2 Constant-current error (channel-to-channel)(1) All OUTn = on, BC = 2Ah,VOUTn = 1 V, RIREF = 10.7 kΩ (IOUTn = 1-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±3%
ΔIOLC3 Constant-current error (device-to-device)(2) All OUTn = on, BC = 2Ah,VOUTn = 1 V, RIREF = 10.7 kΩ (IOUTn = 1-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2.5%
ΔIOLC4 Constant-current error (channel-to-channel)(1) All OUTn = on, BC = 36h,VOUTn = 1 V, RIREF = 1.27 kΩ (IOUTn = 10-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2.5%
ΔIOLC5 Constant-current error (device-to-device)(2) All OUTn = on, BC = 36h,VOUTn = 1 V, RIREF = 1.27 kΩ (IOUTn = 10-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2.5%
ΔIOLC6 Constant-current error (channel-to-channel)(1) All OUTn = on, BC = 7Eh,VOUTn = 1 V, RIREF = 1.02 kΩ (IOUTn = 25-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2%
ΔIOLC7 Constant-current error (device-to-device)(2) All OUTn = on, BC = 7Eh,VOUTn = 1 V, RIREF = 1.02 kΩ (IOUTn = 25-mA target), TA = 25°C, includes the VIREF tolerance ±1% ±2%
ΔIOLC8 Line regulation(3) All OUTn = on, VCC = 3 V to 5.5 V, VOUTn = 1 V ±1 ±2 %/V
ΔIOLC9 Load regulation(4) All OUTn = on, VOUTn = 1 V to 3 V ±1 ±2 %/V
VIL(ISP) IREF resistor short-protection enter threshold 0.15 0.195 V
VIH(ISP) IREF resistor short-protection release threshold 0.325 0.4 V
T(TSD) Thermal shutdown threshold(5) 170 °C
T(HYS) Thermal shutdown hysteresis(5) 15 °C
II SCLK or SIN Input current VI = VCC or GND at SCLK or SIN –1 1 µA
ICC(0) Supply current(5) GCLK = LAT = SCLK = SIN = GND, GSn = 0000h, BC = 00h, PCHG_EN = 0, VOUTn = VCC, RIREF = open 3 4.5 6 mA
ICC(1) GCLK = LAT = SCLK = SIN = GND, GSn = 0000h, BC = 36h, PCHG_EN = 0, VOUTn is floating, RIREF = 1.27 kΩ (IOUTn = 10-mA target) 4 6.5 8 mA
ICC(2) GCLK = LAT = SCLK = SIN = GND, GSn = 0000h, BC = 7Eh, PCHG_EN = 0, VOUTn is floating, RIREF = 1.27 kΩ (IOUTn = 20-mA target) 4 7.5 9 mA
ICC(3) LAT = SCLK = SIN = GND, GCLK = 33 MHz, GSn = FFFFh, BC = 36h, PCHG_EN = 0, VOUTn = 1 V, RIREF = 1.27 kΩ (IOUTn = 10-mA target) 4.7 7 10 mA
ICC(4) LAT = SCLK = SIN = GND, GCLK = 33 MHz, GSn = FFFFh, BC = 7Eh, PCHG_EN = 0, VOUTn = 1 V, RIREF = 1.27 kΩ (IOUTn = 20-mA target) 4.7 7.7 10 mA
ICC(6) In power-save mode, PCHG_EN = 0, RIREF = 1.60 kΩ 1 1.5 mA
RDW Pulldown resistor LAT 250 480 750 kΩ
GCLK 250 480 750
(1) The deviation of each output from average of all channels constant current. The deviation is calculated by the formula. TLC6946 TLC6948 equation-01-c2c-accuracy-slsvseb3.gif
(2) The deviation of the average of constant current from the ideal constant current value. TLC6946 TLC6948 tlc6946-equation-02-d2d-accuracy-slsvseb3.gif ,Ideal current is calculated by the following equation TLC6946 TLC6948 tlc6946-equation-03-ideal-output-slsvseb3.gif
(3) Line regulation is calculated by the following equation TLC6946 TLC6948 tlc6946-equation-04-line-regulation-slsvseb3.gif
(4) Load regulation is calculated by the following equation TLC6946 TLC6948 tlc6946-equation-05-load-regulation-slsvseb3.gif
(5) Specified by design