TLC5958 Texas instruments

TLC5958

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TLC5958

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Описание

The TLC5958 is a 48 channels constant-current sink driver for multiplexing system with 1 to 32 duty ratio. Each channel has an individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS). 48K bit display memory is implemented to increase the visual refresh rate and to decrease the GS data writing frequency. The output channels are grouped into three groups, each group has 16 channels. Each group has a 512-step color brightness control (CC) function. The maximum current value of all 48 channels can be set by 8-step global brightness control (BC) function. CC and BC can be used to adjust the brightness deviation between LED drivers. GS, CC, and BC data are accessible via a serial interface port. Send request via email for Application Note: Build High Density, High Refresh Rate, Multiplexing LED Panel with TLC5958. The TLC5958 has one error flag: LED open detection (LOD), which can be read via a serial interface port. The TLC5958 also has a power-save mode that sets the total current consumption to 0.8mA (typ) when all outputs are off.Send request via email for Application Note: .

48 Channels Constant Current Sink Output
Sink Current Capability with Max BC/CC data:
- 25mA at 5VCC
- 20mA at 3.3VCC
Global Brightness Control (BC) : 3-Bit (8 Step)
Color Brightness Control (CC) for Each Color Group:
9-Bit (512 Step), Three Groups
Grayscale(GS) Control with Multiplexed
Enhanced Spectrum(ES) PWM: 16bit
48K bit Grayscale Data Memory Support
32-multiplexing
LED Power Supply Voltage Up To 10V
Vcc = 3.0V to 5.5V
Constant Current Accuracy
- Channel to Channel = ±1%(Typ), ±3%(Max)
- Device to Device = ±1%(Typ), ±2%(Max)
Data Transfer Rate: 25MHz
Gray Scale Clock: 33MHz
LED Open Detection (LOD)
Thermal Shut Down (TSD)
I_REF Resistor Short Protection (ISP)
Power-Save Mode (PSM) with high speed recovery
Delay Switching to Prevent Inrush Current
Pre-charge FET to Avoid Ghosting Phenomenon
Operating Temperature : –40°C to +85°C

Features	48CH LED Driver, Error Flag, Fault Detection, LED Open Detection, PWM LED Driver, Pre-Charge FET, SRAM, Thermal shutdown
Analog dimming steps	512
Data transfer rate (typ) (MHz)	25
Ch to ch accuracy (typ) (±%)	1
Rating	Catalog
Operating temperature range (°C)	-40 to 85