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

• 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.

• For anode-common LEDs

• Input signal voltage level: CMOS level (Schmitt trigger input)

• Power supply voltage range VDD = 4.5 V~5.5 V

• Maximum output pin voltage: 26 V

• Serial and parallel data transfer rate: 20 MHz (max, cascade connection)

• Operating temperature range Topr = −40°C~85°C

• Package: HQFP64-P-1010-0.50. A Heat sink can be fitted.