LP3944
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Краткое описание:
8-Channel RGB/White/Blue LED Driver with I2C Interface
Дополнительная информация
The LP3944 is an integrated device capable of independently driving 8 LEDs. It contains an internal precision oscillator that provides all necessary timing for driving each LED. Two prescaler registers along with two PWM registers provide duty cycle control. The device is designed to reduce bus traffic in I2C applications by allowing the host to set frequency and duty cycle for each output pin once, after which a single command can turn outputs on, off, or to a programmed dimming rate. Any ports not used for LEDs can be used as general-purpose I/O expanders. It features open-drain outputs and supports variable dimming rates from 6.25ms to 1.6s.
| RoHS | Compliant |
| Lead Free | Yes |
| Interface Type | I2C/SMBus |
| Number of Channels | 8count |
| Input Voltage (Max) | 5.5V |
| Input Voltage (Min) | 2.3V |
| Shutdown Current (Typ) | 2µA |
| Dimming Frequency Range | 0.625 to 160Hz |
| LED Current Per Channel | 25mA |
| Quiescent Current (Typ) | 0.35mA |
| Operating Temperature Range | -40 to 85°C |
| Total Output Sink Current (Max) | 200mA |
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