TB62D612FTG Datasheet, PDF (13/24 Pages) Toshiba Semiconductor – 24-Channel Constant-Current LED Driver of the 3.3-V and 5-V Power Supply Voltage Operation

9. Points to Note when Setting Up the TB62D612FTG
TB62D612FTG
1. External resistors for specifying the LED driving current (Rext-R, Rext-G, Rext-B)
External resistors should be separately connected to the Rext-R, Rext-G and Rext-B pins. Three resistors must not be
collectively connected to a single pin. If they are connected to a single pin, current error is generated in each RBG.
2. External resistors for ID configuration
The total resistance value of three external resistors used for specifying a device ID (which are connected between Vcc and
GND) should be about 30 kΩ or lower.
3. ID configuration sequence
ID configuration can be performed after POR is released upon powering on. However, to avoid false operation of the ID
configuration, transient input signals of less than two clock cycles of the reference clock for the internal oscillator are not
accepted.
Vcc
2V
1.8V
ID Configuration Not Allowed
ID Configuration Allowed
ID Configuration Not Allowed
Care should be taken during the period between the POR released timing and
the timing when power supply has reached the rated Vcc voltage.
4. ID configuration
Make sure to set IDs after releasing reset condition.
5．Data configuration
Do not input the data which is not on the list of the data configuration table in page 6 and 7.
Data is written to the shift resister at the rising edge of SCLK every 8 bits. And data is transferred at the falling edge of the
eighth clock. So, input data to the falling edge at the eighth clock.
6．Special mode
Data which corresponds to 24 channels should be inputted. If data of more than 24 channels are provided, the 25th and
subsequent data are treated as invalid. If data of less than 24 channels are provided, those data are written to the channels
in order and the remaining channels retain the previous data.
７．Timing of data configuration
In order to set data to the same slave address, next data should be inputted after３ms which corresponds to 127 internal
PWM clocks is passed since the period command is inputted. However, in order to set data to the different slave address,
terminal of 3 ms which corresponds to 127 internal PWM clocks should not be taken.
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2012-07-23