max. 100mA/ch, 27-channel RGB LED Driver
The AP4201 is a 27 channels RGB LED driver. It is able to drive a 100mA at maximum and easily realize unfettered color expression while maintaining the color reproducibility of LED screen for decoration such as amusement equipment. In addition, the AP4201 supports high-speed response for animated expression.
Each RGB current can be controlled by external resistors and also each channel current can be set in 256 levels corresponding to 256 color gradations. Therefore, the color tone for the application can be compensated easily.
Since the AP4201 controls LEDs by 8-bit PWM method with 4-wire SCI interface or Serial-F/F cascade in accordance with the LED gradation data (256 levels) that is programmed into the device, LED current can be varied in high-speed. Therefore the AP4201 enables a video expression.
It is possible to reduce wirings of the PCB since the AP4201 corresponds to a wide operating voltage range of 4.5V to 5.5V and 8V to 24V, and the voltage on anode side of LEDs can be taken from this power supply line. The 5V outputs generated by the internal LDO can provide 30mA (max.) current thus the AP4201 contributes to reduce the number of parts of the system.
Amusement Equipment, Tablet Devices, Decorative Displays, Vending Machines, etc.
|1.||Operating Temperature range||0～70°C|
|2.||Input Voltage range||8.0V～24.0V、4.5V～5.5V|
|（Please connect the VIN pin and the VDC1 pin when input voltage is 4.5~5.5V）|
|3.||Absolute Maximum Voltage||30V（VIN、LEDR0～8、LEDG0～8、LEDB0～8）|
|4.||2 Types of Serial Interface for Setting Lighting Data (Selectable by SCIEN pin)|
|- 4-wire SCI interface(CSB, SCK, TxD, RxD)||(maximum communication clock: 5MHz）|
|- Serial-F/F cascade||(maximum communication clock: 10MHz)|
|* Both interfaces correspond to 3.3V and 5.0V input signals (output is fixed to 5.0V)|
|5.||LED current (Selectable by DRSET pin)|
|- Constant Current Output||50mA/ch|
|- Open Drain Output||100mA/ch|
|(Each channel current will be less than these values above when all channels are set simultaneously)|
|6.||LED Gradation||8-bit PWM Gradation Method (256 levels)|
|7.||PWM Cycle||Built-in PWM Generator, Adjustable PWM Period|
|8.||Simultaneous Lighting-off Function||only for SCI interface|
|- Under Voltage Lock Out (UVLO)|
|- Over Current Protection (OCP)|
|- Thermal Shutdown (TSD)|