NJU6062
Full Color LED Controller Driver with PWM Control
GENERAL DESCRIPTION
The
NJU6062
is a full color LED controller driver. It can
control and drive a 3 in 1 packaged (Red, Green and
Blue) LED.
The
NJU6062
contains PWM luminance (Pulse Width
Modulation) control circuit , LED driving circuit, MPU
interface.
The PWM signal control the duty cycle of each RGB
LED delicately, therefore can recognize a lot of colors.
Enable terminal (ON/OFF) is possible to synchronize
with a sound source..
It requires only four external components such as three
resistors for LED current adjustment, which enables the
NJU6062
to save PCB space.
Multi Device control is enabled and it is possible to
control the multiple
NJU6062
by a I
2
C address.
The
NJU6062
is suitable for cellular phone, car audio
and so on.
PACKAGE OUTLINE
NJU6062V
(SSOP14)
FEATURES
Controlling a 3-in-1 packaged RGB LED
4-channel output
I
LED
=30mA x 4
Built-in PWM luminance control
(256steps x 4)
2
Built-in I C interface circuit
Multi Device control
Built-in CR oscillation circuit
Operating voltage
1.8V to 5.5V
Package
SSOP14
CMOS Technology
Ver.2012-07-30
-1-
NJU6062
PIN CONNECTIONS (TOP VIEW)
NC
LED4
LED3
LED2
LED1
VSS
OSC
EN
VDD
SCL
Top View
SDA
RSTb
NC
DATAOUT
SSOP14
PIN DESCRIPTIONS
PIN No.
12
11
10
8
7
6
5
4
3
2
14
13
1,9
PIN NAME
SCL
SDA
RSTb
DATAOUT
OSC
V
SS
LED1
LED2
LED3
LED4
EN
V
DD
NC
TYPE
Input
Input /
Output
Input
Output
Input
Power
Output
Output
Output
Output
Input
Power
Enable terminal
built-in Pull-up resistor
“H” : LED ON
“L” : LED OFF
V
DD
Power Supply terminal
Non Connect
These terminals are electrically open.
LED Connect terminals (Open drain output)
Output level can be divided into 256 steps by PWM signal.
Connecting with the cathode of LED.
Serial Clock terminal
Serial Data terminal
Reset terminal - Active “L”.
"L" status: Reset state
"H" status: Operating state
Multi Device control terminal (connect RSTb of next NJU6062 for Multi
Device use.)
External clock input terminal
It is used by external clock.
Normally open.
Ground terminal
DESCRIPTIONS
-2-
Ver.2012-07-30
NJU6062
BLOCK DIAGRAM
3.6 to 6.0V
1.8 to 5.5V
OSC
OSC
VDD
256 step
PWM
Driver
30mA
LED1
256 step
PWM
IC
I/F
2
Driver
30mA
LED2
C
P
U
RSTb
SCL
SDA
Instruction
Decoder
256 step
PWM
Driver
30mA
LED3
256 step
PWM
EN
Driver
30mA
LED4
DATAOUT
FUNCTIONAL DESCRIPTIONS
(1) Description for Each Blocks
(1-1) PWM Luminance Control
The
NJU6062
incorporates four 256 steps PWM Luminance Control circuits.
At the user’s option, PWM data can be set.
PWM data set by selecting start point(S) and end point(E) of each terminal.
LED1
LED2
LED3
LED4
1-frame
f
OSC
=1MHz
1/256step 1us(1MHz)
1-frame = 256step = 256us(3.9kHz)
LED1
LED2
LED3
LED1 S
LED2 S
Ver.2012-07-30
LED1 E
LED2 E
LED3 S
LED4 S
LED3,4 E
-3-
NJU6062
(1-2) Oscillator
The oscillation circuit with the internal register and capacitor generates the clock signal for PWM.
The oscillation circuit can be turned on/off by the instruction to minimize the current consumption.
The oscillation frequency (fosc) can be selected in 16 conditions by the instruction.
Additionally, it can operate the external clock without using the internal oscillation circuit.
If not zero PWM signal is still output after the oscillation circuit OFF, write “00h” into the start point(S) and
end point(E) register or let EN =“L”.
(1-3) Enable function
The enable terminal (EN terminal) is used to turn on/off the device from the external. The register value
does not change by this signal. When EN terminal is not used open.
-4-
Ver.2012-07-30
NJU6062
(2) Instructions
The data transfer between CPU and the
NJU6062
is via a I
2
C interface.
Table.1 shows the instruction codes of the
NJU6062.
Table 1. Instruction Code
* : Don’t Care
Lower
address
D
7
D
6
D
5
Code
Description
D
4
D
3
D
2
D
1
D
0
AL : Address increment
PWM : PWM output
FC
1
, FC
0
: OSC freq. Select
FD
1
, FD
0
: Divide ratio Select
EXT : External OSC use
FS : Internal OSC ON/OFF
PWM data/ Start Point
/ End Point Set
Instruction
(a)
Function Set
00h
AI
PWM
FC
1
FC
0
FD
1
FD
0
EXT
FS
LED1 Start
LED2 Start
LED3 Start
LED4 Start
(b)
LED1End
LED 2End
LED3 End
LED4 End
(c)
Update/
Static on
NOP
(d)
Multi Device
Address set
NOP
(e)
Maker Testing
Inhibited command
01h
02h
PWM data/ Start Point
03h
04h
05h
06h
PWM data/ End Point
07h
08h
09h
0Ah~0Fh
10h
11h~1Eh
1Fh
20h~FFh
UD
4
UD
3
UD
2
UD
1
GP
4
GP
3
GP
2
GP
1
UD
1
to UD
4
: Data update
GP
1
~GP
4
: Statifc ON/OFF
Non Operation code
(Not Applicable)
Multi Device mode
address set
Non Operation code
(Not Applicable)
Inhibited command
Inhibited command
*
MA
7
*
MA
6
*
MA
5
*
MA
4
*
MA
3
*
MA
2
*
MA
1
*
MA
0
*
T
7
*
T
6
*
T
5
*
T
4
*
T
3
*
T
2
*
T
1
*
T
0
*
*
*
*
*
*
*
*
Ver.2012-07-30
-5-
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