NJU6060 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU6060

Full Color LED Controller Driver with PWM Control

Japan Radio Corporation  

! BLOCK DIAGRAM

VDD

OSC

VDD

RSTb

C

CSb

P

CLK

U DATA

VSS

OSC

I

/

Instruction

F

Decoder

NJU6060

32step

PWM

32step

PWM

32step

PWM

Driver

Driver

Driver

LED1

LED2

VLED

LED3

! FUNCTIONAL DESCRIPTIONS

(1) Description for each blocks

(1-1) PWM Luminance Control

The NJU6060 incorporates three channel of 32 steps PWM Luminance Control circuits. 32 steps of Luminance

Control by setting up DUTY. The relation between a register and DUTY is shown below:

REGISTER

0,0,0,0,0

0,0,0,0,1

0,0,0,1,0

0,0,0,1,1

0,0,1,0,0

0,0,1,0,1

0,0,1,1,0

0,0,1,1,1

DUTY

1/32

2/32

3/32

4/32

5/32

6/32

7/32

8/32

REGISTER

0,1,0,0,0

0,1,0,0,1

0,1,0,1,0

0,1,0,1,1

0,1,1,0,0

0,1,1,0,1

0,1,1,1,0

0,1,1,1,1

DUTY

9/32

10/32

11/32

12/32

13/32

14/32

15/32

16/32

REGISTER

1,0,0,0,0

1,0,0,0,1

1,0,0,1,0

1,0,0,1,1

1,0,1,0,0

1,0,1,0,1

1,0,1,1,0

1,0,1,1,1

DUTY

17/32

18/32

19/32

20/32

21/32

22/32

23/32

24/32

REGISTER

1,1,0,0,0

1,1,0,0,1

1,1,0,1,0

1,1,0,1,1

1,1,1,0,0

1,1,1,0,1

1,1,1,1,0

1,1,1,1,1

DUTY

25/32

26/32

27/32

28/32

29/32

30/32

31/32

32/32

(1-2) Oscillator

The NJU6060 Oscillation circuit is generated clock which generates PWM by connecting external resistor.

The oscillation circuit with the external register generate the clock for PWM. The PWM frequency (fPWM) is finely

adjusted by value of the external register. In addition, the ON/OFF of oscillation circuit is controlled by the instruction,

and the current consumption is decreased when it was OFF of the oscillation circuit.

If PWM was high when the oscillation circuit became OFF, the situation of PWM was kept. Input OFF command of

the output port.

Ver.2004-04-16

-3-

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