TLC5947系列介绍资料

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TLC5947

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具有内部振荡器的 24 通道 12 位 PWM LED 驱动器

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The TLC5947 is a 24-channel, constant-current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps. PWM control is repeated automatically with the programmed grayscale (GS) data. GS data are written via a serial interface port. The current value of all 24 channels is set by a single external resistor.

The TLC5947 has a thermal shutdown (TSD) function that turns off all output drivers during an over-temperature condition. All of the output drivers automatically restart when the temperature returns to normal conditions.

24 Channels, Constant-Current Sink Output
30-mA Capability (Constant-Current Sink)
12-Bit (4096 Steps) PWM Grayscale Control
LED Power-Supply Voltage Up to 30 V
V_CC = 3.0 V to 5.5 V
Constant-Current Accuracy:
- Channel-to-Channel = ±2% (Typical)
- Device-to-Device = ±2% (Typical)
CMOS Logic Level I/O
30-MHz Data Transfer Rate (Standalone)
15-MHz Data Transfer Rate (Cascaded Devices,
SCLK Duty = 50%)
Shift Out Data Changes With Falling Edge to
Avoid Data Shift Errors
Auto Display Repeat
4-MHz Internal Oscillator
Thermal Shutdown (TSD):
- Automatic Shutdown at OverTemperature Conditions
- Restart Under Normal Temperature
Noise Reduction:
- 4-Channel Grouped Delay to Prevent Inrush Current
Operating Temperature: –40°C to 85°C

Number of channels	24
LED current per channel (mA)	30
Vin (min) (V)	3
Vin (max) (V)	5.5
Features	PWM control, Thermal shutdown
Operating temperature range (°C)	-40 to 85
Rating	Catalog

HTSSOP (DAP)	32	89.1 mm² 11 x 8.1
VQFN (RHB)	32	25 mm² 5 x 5

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TLC5947

具有内部振荡器的 24 通道 12 位 PWM LED 驱动器

4000-306-326