TLC5955
- 48 Constant-Current Sink Output Channels
- Sink Current Capability with Maximum MC, DC, and BC Data:
- 23.9 mA (VCC ≤ 3.6 V, MC = 5)
- 31.9 mA (VCC > 3.6 V, MC = 7)
- Grayscale (GS) Control:
- 16-Bit (65,536 Steps) with Enhanced Spectrum or Conventional PWM
- Maximum Current (MC) Control:
- 3 Bits (8 Steps) with a 3-mA to 30-mA Range
- 3 MC Sets for Each Color Group
- Dot Correction (DC) Control:
- 7 Bits (128 Steps) with a 26.2% to 100% Range
- Global Brightness Control (BC):
- 7 Bits (128 Steps) with a 10% to 100% Range
- 3 BC Sets for Each Color Group
- LED Power-Supply Voltage: Up to 10 V
- VCC: 3.0 V to 5.5 V
- Constant-Current Accuracy:
- Channel-to-Channel: ±2% (typ), ±5% (max)
- Device-to-Device: ±2% (typ), ±4% (max)
- Data Transfer Rate: 25 MHz
- Grayscale Control Clock: 33 MHz
- Auto Display Repeat
- Display Timing Reset
- Auto Data Refresh (GS and DC Only)
- LED Open Detection (LOD)
- LED Short Detection (LSD)
- UVLO Sets Default Data
- Delay Switching to Prevent Inrush Current
- Operating Temperature: –40°C to +85°C
The TLC5955 is a 48-channel, constant-current sink driver. Each channel has an individually-adjustable, pulse width modulation (PWM), grayscale (GS) brightness control with 65,536 steps and 128 steps of constant-current dot correction (DC). DC adjusts brightness deviation between channels. All channels have a 128-step global brightness control (BC). BC adjusts brightness deviation between the R, G, B color group. The eight-step maximum current control (MC) selects the maximum output current range for all channels of each color group. GS, DC, BC, and MC data are accessible with a serial interface port.
The TLC5955 has two error flags: LED open detection (LOD) and LED short detection (LSD). The error detection results can be read with a serial interface port.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TLC5955 48-Channel, 16-Bit, PWM LED Driver with DC, BC, LED Open-Short Detection, and Internal Current Setting datasheet | PDF | HTML | 2014年 3月 7日 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Technical article | Improve the user experience with an LED ring | PDF | HTML | 2017年 11月 9日 |
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