PDF AP4201 Data sheet ( Hoja de datos )

Número de pieza	AP4201
Descripción	27ch 100mA LED Driver IC
Fabricantes	AKM
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No Preview Available ! [AP4201] AP4201 27ch 100mA LED Driver IC 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  Power Supply Voltage 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 015008157-E-00 -1- 2015/09 1 page ■ Function No. Name 1 A3/CLRB 2 A4/ENB 3 CSB/LAT 4 SCK/CLK 5 TxD/SI 6 RxD/SO 7 DRSET 8 SCIEN [AP4201] Equivalent circuit VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 VDC1 Explanation IC address input pin 3 (built in 100k ohm pull-up resistor). Configure by connecting to GND or open. CLRB input pin used for serial F/F. Data clear pin used for shift register. IC address input pin 4 (built in 100 k ohm pull-up resistor). Configure by connecting to GND or open. ENB input pin used for serial F/F. Control the shift resister data which reflect to PWM data or not. Strobe signal input pin for SCI. Respective orders are accepted when the CSB terminal goes “L” level. The CSB terminal always needs to be “L” level while commands are entered or data are transferred. If the CSB pin goes “H” level when data are transferred, the commands are disregarded. LAT signal input pin used for serial F/F. Input LAT signal for shift register. Clock signal input for SCI. Writing data is entered from the TxD pin at the SCK rising edge, reading data is output to RxD pin at the SCK falling edge. It is not always necessary to supply a clock signal to the SCK pin. CLK signal input pin used for serial F/F. CLK signal for shift register. Data signal input pin. To input commands, writing data. SI input pin for serial F/F. To input data signal of shift register. Input to F/F which determine LEDB0 lighting data. Data signal output pin for SCI. To output reading data. Outputs Hi-Z except when data is output. SO output pin for serial F/F. To output data signal of shift register. Output from F/F which determine LEDR8 lighting data. Switching pin which can switch to driver output current source or open drain (100kohm pull up) Connect to GND or set to open. If connect to GND, it can work as open drain mode. Enable pin for serial interface. (100kohm pull up) Connect to GND or set to open. If connect to GND, it can work as serial F/F control mode. If open this pin, it can work as SCI control mode. 015008157-E-00 -5- 2015/09 5 Page ■ SCI Interface (AC timing) Table 1. SCI Timing Parameter SCK Period SCK Pulse Width CSB Set-up Time CSB Hold Time Data Set-up Time Data Hold Time RxD pin Output Delay Time CSB High-level Minimum Time RxD pin High-impedance Output Delay Time SCK, CSB, TxD Raising Time Symbol tSCKP tSCKW tCSS tCSH tDIS tDIH tPD tCS tOZ tCSR SCK, CSB, TxD Falling Time tCSF min 200 60 50 70 50 70 - - 2 - - - - - [AP4201] typ max Unit Condition - - ns - - ns - - ns - - ns - - ns - - ns - 80 ns CL=100pF - 50 ns CL=20pF - - μs - 250 ns CL=100pF - tSCKW×15% ns tSCKW<4000ns - 600 ns tSCKW≥4000ns - tSCKW×15% ns tSCKW<4000ns - 600 ns tSCKW≥4000ns CSB SCK TxD RxD tCS tCSS tSCKP tSCKW tSCKW tDIS tDIH Hi-Z Figure 2. SCI Interface Timing Chart 1 015008157-E-00 - 11 - 2015/09 11 Page

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