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TCA6507PWRG4 Fiches technique(PDF) 10 Page - Texas Instruments |
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TCA6507PWRG4 Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 32 page www.ti.com TCA6507 LOW-VOLTAGE 7-BIT I2C AND SMBus LED DRIVER WITH INTENSITY CONTROL AND SHUTDOWN SCPS164B – MAY 2007 – REVISED NOVEMBER 2007 Table 13. Time Parameters CODE TIME (ms) 0 0 1 64 2 128 3 192 4 (default) 256 5 384 6 512 7 768 8 1024 9 1536 10 2048 11 3072 12 4096 13 5760 14 8128 15 16320 The Maximum Intensity register (register 8) defines the duty cycle of the waveform driving the LED in its fully-on state per region F in Figure 7. The first four bits (C7–C4) in this register set the duty cycle for BANK1 and the next four bits (C3–C0) set the duty cycle for BANK0. The data for each bank is a binary number between 0 and 15. For BANK1, the MSB is bit C7, while the LSB is bit C4. For BANK0, the MSB is bit C3, while the LSB is bit C0. The values in this register also define the LED intensity indicated by the BRIGHT_F0 or BRIGHT_F1 modes. The intensity of each LED is updated 125 times per second (every 8 ms with a 32-kHz clock). Table 14. Register 8 (Maximum Intensity Register) BANK BANK1 BANK0 BIT C7 C6 C5 C4 C3 C2 C1 C0 DEFAULT 1 1 1 1 1 1 1 1 Table 15. Intensity Parameters (see Figure 7) REGISTER REGION PARAMETER NAME PARAMETER RANGE REGISTER NAME REGISTER RANGE 0 to 16320 ms A1, A2 Fade-on time 0 to 15 Fade-On Time 2 (exponential trend) 0 to 16320 ms B1, B2 Fully-on time 0 to 15 Fully-On Time 3 (exponential trend) 0 to 16320 ms C1, C2 Fade-off time 0 to 15 Fade-Off Time 4 (exponential trend) 0 to 16320 ms D First fully-off time 0 to 15 First Fully-Off Time 5 (exponential trend) 0 to 16320 ms E Second fully-off time 0 to 15 Second Fully-Off Time 6 (exponential trend) F Maximum intensity 0 to 100% 0 to 15 Maximum Intensity 7 10 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated Product Folder Link(s): TCA6507 |
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