Microcontrollers that output high-resolution PWM for fine dimming and toning of LED lighting
RL78/I1A microcontrollers realize PWM output of a minimum 0.98 ns resolution using 64 MHz timer operation and dithering function, supporting fine dimming and toning. Through cooperation between the PWM timer and comparator/external interrupt input, PFC control and protection functions can be realized by hardware. Low consumption current of 3.3 mA during LED and power supply control and 0.23 μA when waiting for UART (DALI) communication allows the power consumption of the system to be reduced. DALI/DMX512 lighting communication and Power Management Bus (PMBus) and System Management Bus (SMBus) power communication are supported. These microcontrollers can be used in LED lighting equipment and digital power supplies.
Main Solutions
Key Features:
| ITEM | RL78/I1A | |||
|---|---|---|---|---|
| Pin Count | 20-pin | 30-pin | 38-pin | |
| Part Name | R5F1076xxxSP | R5F107AxxxSP | R5F107DxxxSP | |
| I/O Port | Total | 16 | 26 | 34 |
| CMOS I/O | 13 | 23 | 29 | |
| CMOS input | 3 | 3 | 5 | |
| Timer | 16-bit timer (TAU) | 8 channels (no timer output) | 8 channels (timer output: 1, PWM output: 1) | 8 channels (timer outputs: 3, PWM outputs 3) |
| 16-bit timer (KB) | 2 channels (PWM outputs: 4) | 3 channels (PWM outputs: 6) | ||
| 16-bit timer (KC) | 1 channel (PWM outputs: 3) | 1 channel (PWM outputs: 6) | ||
| Real time clock (RTC) | 1 channel (no output) | 1 channel (1 output) | ||
| 8/10-bit A/D converter | 6 channels | 11 channels | ||
| Comparator | 4 channels | 6 channels | ||
| Programmable gain amplifier | 1 channel (Input: 4 channels) | 1 channel (Input: 7 channels) | ||
| Serial interface | UART (Supporting LIN-bus and DMX512) | 1 channel | - | |
| UART (Supporting DALI communication) | 1 channel | |||
| UART | - | 1 channel | ||
| CSI/UART (Supporting LIN-bus and DMX512): | - | - | 1 channel | |
| I2C bus | 1 channel | |||
| Vectored interrupt sources | 7 external / 27 internal | 10 external / 30 internal | 11 external / 30 internal | |
| Operating ambient temperature | -40 to +105 ℃ (R5F107xxxGSP) / -40 to +125 ℃ (R5F107xxxMSP) | |||
Block Diagram:
You can find an explanation of orderable part numbers here.
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|---|---|
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