TCA6507_16 Datasheet, PDF (14/45 Pages) Texas Instruments – Low-Voltage 7-Bit I2C and SMBus LED Driver

TCA6507
SCPS164C – MAY 2007 – REVISED JANUARY 2016
Functional Block Diagram (continued)
Select2
Pulse
Data From
Shift Register
Select1
Pulse
Select0
Pulse
Select2
Register
DQ
FF
C_{K Q}
Select1
Register
DQ
FF
C_{K Q}
Select0
Register
DQ
FF
C_{K Q}
Logic 1
BRIGHT_F0
BRIGHT_F1
Logic 0
PWMALD
PWM0
PWM1
A
B
C
A
A
B
B
C
D
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P6–P0
ESD Protection
Diode
GND
Figure 11. Output Port Simplified Schematic
8.3 Feature Description
8.3.1 Seven LED Driver Outputs
The TCA6507 features 7 outputs that can be controlled with multiple modes: ON, OFF, blinking (one of the two
separate banks), and fading at a programmable rate (one of the two separate banks).
8.3.2 Open-Drain Outputs Directly Drive LEDs
The TCA6507 has open-drain outputs (see Figure 11) that are capable of sinking current up to 40 mA for LEDs.
8.3.3 Widely Programmable
The TCA6507 has two separate banks, which can be programmed to do a wide variety of blink rates, fade-ON
and fade-OFF rates, as well as maximum intensity (brightness).
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