晶錡科技 StarChips
SCT2508 8-bit PWM LED Driver with Global Brightness Control
Features
* Patented SPI interface for simplicity of local dimming control
* Real-time dot correction of luminance
* Backlight local dimming controller available
* Daisy chained SPI interface by SYI and SYO
* 5 MHz built in PWM clock, 8 individual 8"bit PWM controlled outputs
* 8 robust constant current sinker with LED power"supply voltage up to 24V
* Excellent regulation to load, supply voltage and temperature
Temperature regulation: ±0.005%/°C,
Load regulation: ±0.1%/V
Line regulation: ±0.5%/V
* High current matching accuracy: ±1% between outputs, ±2% between ICs
* Fine grayscale response with 120ns PWM pulse width
* Buffered outputs to regenerate input signals for cascaded operation
* Output current is set by a single external resistor and OEI programmable outputs
* Constant output current : 3 – 30/45mA@3.3/5V
* Low dropout voltage 0.5V@20mA, VDD=5V
* CMOS Schmitt trigger inputs
* Built"in power on reset(POR) circuit forces all the outputs ON while power on
* Built"in thermal protection function to prevent damage from over current operation
* Package: TSSOP20
* Applications: Local dimming LED backlight
| SCT2508 Package Type |
SCT2508
(TSSOP20) |
 |
SCT2508 Typical Applications circuit
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