TLC5957
- 48 Constant-Current Sink Output Channels
- Sink Current Capability with Max BC/CC data
- 1~20mA (VCC = 3.3V)
- 1∼25mA (VCC = 5V)
- Global Brightness Control (BC): 3-Bit (8 Step)
- Global Brightness Control (CC) for Each Color Group:
9-Bit (512 Step), Three Groups - LED Power Supply Voltage up to 10V
- VCC = 3.0 to 5.5V
- Knee Voltage Vout = 0.24V at 10mA
- Constant Current Accuracy
- Channel to Channel = ±1%(Typ), ±3%(Max)
- Device to Device = ±1%(Typ), ±2%(Max)
- Data Transfer Rate : 33MHz
- Grayscale Control Clock : 33MHz
- Pre-charge FET for Ghost Cancelling
- Enhanced Circuit for Caterpillar Cancelling
- Selectable Data Transfer Bit and PWM Bit (9 bit to 16 bit)
- Selectable Traditional PWM and ES-PWM
- LED Open Detection (LOD)
- Thermal Shut Down (TSD)
- Auto Display Repeat/Auto Data Refresh
- Delay Switching to Prevent Inrush Current
- Operating Temperature : –40°C to +85°C
The TLC5957 is a 48-channel constant current sink driver. Each channel has an individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS) brightness control.
The output channels are divided into three groups, each group has a 512 step color brightness control (CC), CC adjusts brightness between colors. The maximum current value of all 48 channels can be set by 8-step global brightness control (BC). BC adjusts brightness deviation between LED drivers. GS, CC and BC data are accessible via a serial interface port.
TLC5957 has one error flag: LED open detection (LOD), which can be read via a serial interface port. Each constant-current has a pre-charge field- effect transistor (FET), which can remove ghosting and improve display performance on the multiplexing LED display. Besides, TLC5957 has an enhanced circuit, it can cancel the caterpillar effect caused by LED open.
TLC5957 has a poker data transmission mode; GS data length can be configured from 9 bit to 16 bit according to PWM bits in each sub-segment. Poker Mode can significantly increase visual refresh rate in multiplexing applications.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling datasheet | PDF | HTML | 2014年 8月 21日 |
White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
User guide | How to Use TLC5957 to Build a Multiplexing LED Wall | 2016年 5月 25日 |
設計與開發
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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
封裝 | 引腳 | 下載 |
---|---|---|
VQFN (RTQ) | 56 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。