TB6718AFG Datasheet, PDF (1/31 Pages) Marktech Corporate – Controller and Driver for Full-color LED Modules and Panels

TOSHIBA Bi-CMOS Integrated Circuit Silicon Monolithic
TB62718AFG
Controller and Driver for Full-color LED Modules and Panels
TB62718AFG
The TB62718AFG is an LED driver which is suitable for driving full-color
LED modules. This device has built-in 8 bit PWM grayscale and an output
current adjustment functions. It can turn on to 16 LEDs. This device has a
heat sink fitting side on the surface of the package. Then, a heat sink will
dissipate heat generated in the device. In addition, this device incorporates
built-in TSD (thermal Shutdown) and output-open detection functions to
protect the device.
Features
• Output current capability and number of outputs: 90 mA × 16 outputs
Weight: 0.26 g (typ.)
• Constant current range: 5 mA~75 mA
• Application output voltage: 0.7 V (output current 5 mA~90 mA)
• Adjustment function
1. Standard current adjustment (8-bit serial data input)
This function supports standard current adjustment using an external resistance connected to the REXT pin.
2 high-order bits … Output current can be adjusted to any one of 4 levels in the range 25%~100%.
6 low-order bits … Output current can be adjusted to any one of 64 levels in the range 40%~100%.
2. Each dot adjustment (128-bit serial data input)
This function allows adjustment of the current value for each output (dot).
… Output current can be adjusted to any one of 64 levels in the range 20%~100%.
3. All dot adjustment 1 (8-bit parallel data input)
This function allows adjustment of brightness for each LED module.
5 low-order bits … Output current can be adjusted to any one of 32 levels in the range 50%~100%.
4. All dot adjustment 2 (8-bit parallel data input)
This function allows changes to the frequency of the PWM clock and allows major brightness adjustment for the display.
3 high-order bits … PWM clock frequency can be adjusted to any one of 8 levels in the range 1/1~1/8.
5. 256-grayscale PWM function (8-bit parallel input)
This function controls the pulse width for each output, yielding 256 grayscales.
Maximum PWM clock frequency 10 MHz (for all temperature range), Minimum pulse width 2 ms
• Accuracy of bits in constant-current output levels prior to adjustment
±6.0% max (for output current of 40 mA~80 mA)
±7.0% max (for output current of 20 mA~40 mA)
±12.0% max (for output current of 5 mA~20 mA)
• Protection functions
1. Thermal shutdown function (TSD)
This function monitors the rise in junction temperature.
Connect a pull-up resistor to the ALARM1 pin in order to monitor the temperature.
2. Output Pin Open Detection function
This function detect when an output pin is open.
Connect a pull-up resistor to the ALARM2 pin in order to monitor this.
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