[AP4201]

015008157-E-00

- 1 -

2015/09

1.

General Description

The AP4201 is a 27 channel LED Driver that supports 2 types of serial interfaces (SCI serial interface or serial

F/F cascade interface) to program LED lighting. The built-in 100mA drivable power MOSFET is used to shut

off the LED current, and LEDs are controlled by a PWM method in accordance with the LED gradation data

that is programmed into the device. Constant current output and Open drain output are selectable by DRSET

setting pin. To reduce wirings in the system, voltage on anode side of LEDs can be communized. A maximum

of 32 devices can be connected on a single BUS to a common master device; furthermore, each AP4201 retains

its own programmed commands allowing continuous autonomous lighting. The internal UVLO function

prevents the LEDs from incorrect operations when the supply voltage is 4V or less. An internal over current

protection function and a thermal protection function are also integrated.

2.

Features

8.0V~24.0V

4.5V~5.5V (connect VIN pin and VDC1 pin)

 Oprating Temperature

0 ~ 70C

 Absolute Maximum Voltage

30V (VIN, LEDR0~8, LEDG0~8, LEDB0~8)

 2 Types of Serial Interface for Setting Lighting Data

- 4-wire SCI interface

(maximum communication clock: 5MHz)

- Serial-F/F cascade

(maximum communication clock: 10MHz)

- Applicable to both 3.3V and 5.0V input signal (output is fixed to 5.0V)

 LED Current

maximum 100mA/ch

- Constant Current Output

50mA/ch

- Open Drain Output

100mA/ch

(Each channel current is less than the value above when 27 channels are set simultaneously)

 LED Gradation

8-bit PWM gradation method (256 gradation)

 Built-in PWM Generator, Adjustable PWM Period

 Simultaneous Lighting-Off Function (When SCI interface setting)

 Protection Function

- Under Voltage Lock Out (UVLO)

- Over Current Protection (timer latch recovery type)

- Thermal Shutdown (automatic recovery)

 Package

48-pin LQFP

 Application

A LED loading machine for the decoration

27ch 100mA LED Driver IC

AP4201