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Macroblock
Features
l l l l l l 3 output channels for RGB LED lamps
Preliminary Datasheet
MBI1009
3-Channel RGB LED Lamp Driver
MBI5168CP
MBI1009CP
Output current invariant to load voltage change Programmable output current for each channel Built-in brightness control Constant output current range: 5 - 40mA Output current accuracy: between channels: <5% (max.), and between ICs: <12% (max.)
l
3 ~ 5.5V supply voltage
SSOP16-150-0.64 Weight0.07g
Applications
l l l Multi-color (Color-variable) LED backlight for portable devices Keypad backlighting Push-button backlighting
General Description
MBI1009 is a 3-channel current sink driver for RGB LED lamps. It is easy to be designed in applications that need mixing RGB light sources for multi-color output. MBI1009 contains a serial buffer and data latches which convert serial input data into parallel output format. At MBI1009 output stage, three regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of Vf variations. The output current is determined by an external resistor and the brightness control code, both set by users. MBI1009 provides users with great flexibility and device performance. Users may adjust the output current from 5 mA to 40 mA, which gives users flexibility in controlling the light intensity of LEDs. MBI1009 guarantees to endure maximum 17V at the output port.
(c)Macroblock, Inc. 2004 Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC. TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: info@mblock.com.tw -1-
MBI1009
Block Diagram
OUT0 / GREEN
3-Channel RGB LED Lamp Driver
OUT1 / RED
OUT2 / BLUE
R-EXT
VDD
IO Regulator
OE
Output Driver
Output Driver
Output Driver
6-bit Brightness Control 6 LE
5-bit Brightness Control 5 16-bit Data Latch 16 16-bit Shift Register
5-bit Brightness Control 5
GND
SDI CLK
SDO
Note: To let users understand how to use MBI1009, we assume OUT0 is GREEN output, OUT1 and OUT2 respectively for RED and BLUE. The applications of MBI1009 would not be limited to what has been shown in this example.
Timing Diagram
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CLK
SDI
B4
Bit15
B3
Bit14
B2
B1
B0
Bit11
R4
Bit10
R3
Bit9
R2
Bit8
R1
Bit7
R0
Bit6
G5
Bit5
G4
Bit4
G3
Bit3
G2
Bit2
G1
Bit1
G0
Bit0
Bit13 Bit12
LE
Brightness Control Code
Bit Definition of 16-Bit Brightness Control Code Bit 0 Bit 1 Bit 2 Bit 3
Meaning
Bit 4 G4
Bit 5 Bit 6 Bit 7 Bit 8 Bit 9 Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15 G5 R0 R1 R2 GRED R3 R4 B0 B1 B2 GBLUE 0 0 0 0 0 0 0 B3 B4
G0
G1
G2
G3
GGREEN
Default Value
0
0
0
0
0
0
0
0
0
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April 2004, V0.6
MBI1009
Terminal Description
Pin No. 1 2 3 Pin Name GND SDI CLK Function
3-Channel RGB LED Lamp Driver
Pin Description
Ground terminal for control logic and current sinks Serial-data input to the shift register Clock input terminal for data shift on rising edge Data strobe input terminal
4
LE
Serial data is transferred to the respective latch when LE is high. The data is latched when LE goes low. Constant current output terminal Constant current output terminal Constant current output terminal Output enable terminal
GND SDI CLK LE OUT0 NC NC NC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VDD R-EXT SDO
OE
OUT2 OUT1 NC NC
5 6-10 11 12
OUT0 NC OUT1 OUT2
13
OE
When (active) low, the output drivers are enabled; when high, all output drivers are turned OFF (blanked). Serial-data output to the following SDI of next driver IC Input terminal used to connect an external resistor for setting up output current for all output channels Supply voltage terminal
14
SDO
15 16
R-EXT VDD
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April 2004, V0.6
MBI1009
Maximum Ratings
Characteristic Supply Voltage Input Voltage Output Current Output Voltage Clock Frequency Operating Temperature Storage Temperature
3-Channel RGB LED Lamp Driver
Symbol VDD VIN IOUT VDS FCLK Topr Tstg
Rating 0 ~ 7.0 -0.4 ~ VDD+0.4 +60 -0.5 ~ +17.0 20 -40 ~ +85 -55 ~ +150
Unit V V mA V MHz C C
Electrical Characteristics (Ta = 25C, VDD = 5V, unless otherwise noted)
Characteristics Supply Voltage Output Voltage Output Current Input Voltage "H" level "L" level Symbol VDD VDS IOUT VIH VIL IOH Condition OUT0, OUT1, OUT2 terminals DC Test Circuit Ta = -40~85C Ta = -40~85C VOH = 17.0V Min. 3.0 5 0.8VDD -0.3 Typ. 5.0 26.25 Max. 5.5 17.0 40 VDD+0.3 0.3VDD 10 Unit V V mA V V A mA
Output Leakage Current OUT0 / GREEN Current
VDS = 1.0V, Rex t = 3.6 K IOUT,GREEN GGREEN = (G0,G1,G2,G3,G4,G5) = (1,1,1,1,1,0) IOUT,RED VDS = 1.0V, Rext = 3.6 K GRED = (R0,R1,R2,R3,R4) = (1,1,1,1,1) VDS =1.0V, Rext = 3.6 K GBLUE = (B0,B1,B2,B3,B4) = (1,1,1,1,1) IOUT = 26.25mA VDS = 1.0V Rext = 3.6 K
OUT1 / RED Current
-
26.25
-
mA
OUT2 / BLUE Current
IOUT,BLUE
-
26.25
-
mA
Current Skew
IOUT
250 250 -
1 15 3 500 500 3.0 3.0 8.0 8.0
5 -
%
Output Current Variation vs. Supply Voltage Variation
RIN(up) RIN(down) IDD(off) 1 IDD(on) 1 IDD(off) 1 IDD(on) 1
VDD within 2.7V and 3.3V, Rext = 3.6 K VDD within 4.5V and 5.5V Rext = 3.6 K OE LE Rext = 3.6 K, OUT0/OUT1/OUT2 = Off, VDD = 3.3V Rext = 3.6 K, OUT0/OUT1/OUT2 = On, VDD = 3.3V Rext = 3.6 K, OUT0/OUT1/OUT2 = Off, VDD = 5V Rext = 3.6 K, OUT0/OUT1/OUT2 = On, VDD = 5V
% 800 800 6.0 6.0 mA 12.0 15.0 K K
Pull-up Resistor Pull-down Resistor "OUT Off" "OUT On"
Supply Current
"OUT Off" "OUT On"
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April 2004, V0.6
MBI1009
Switching Characteristics
3-Channel RGB LED Lamp Driver
(Ta = 25C, VDD = 3.3V ~ 5V, unless otherwise noted)
Characteristics CLK Pulse Width LE OE Hold Time for LE Setup Time for LE Hold Time for SDI Setup Time for SDI Clock Frequency Output Rise Time (turn off) Output Fall Time (turn on) Symbol tw(CLK) tw(L) tw(OE) th(L) tsu(L) th(D) tsu(D) FCLK tor tof Min. 25 25 1000 20 20 15 20 Typ. 200 200 Max. 20 400 400 Unit ns ns ns ns ns ns ns MHz ns ns
Timing Waveform
tW(CLK)
CLK
50%
50%
50%
tsu(D)
th(D)
50%
SDI
50%
tW(L)
LE
th(L)
50%
50%
tsu(L)
tW(OE) OE
50% 50%
GREEN/RED/BLUE
90% 50% 10%
90% 50% 10%
tof
tor
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April 2004, V0.6
MBI1009
Application Information Typical Application Circuit
3-Channel RGB LED Lamp Driver
VLED
3.3V or 5.0V
Controller
VDD /OE LE CLK SDI
OUT0 / GREEN
OUT1 / RED
OUT2 / BLUE
MBI1009
R-EXT 3.6 K GND SDO
Current Setting for GREEN, RED, and BLUE Output Ports
The output currents of OUT0 / GREEN, OUT1 / RED, and OUT2 / BLUE are determined by an external resistor and the 16-bit Brightness Control Code, both set by users. That is: IOUT,GREEN = GGREEN x I (Rext); IOUT,RED = GRED x I (Rext); IOUT,BLUE = GBLUE x I (Rext); where I (Rext) is the reference current set by the external resistor Rext and GGREEN, GRED, GBLUE are current gains for output channels OUT0 / GREEN, OUT1 / RED, and OUT2 / BLUE , respectively.
I (Rext) (Ta = 25C, VDD = 3.3V) - A reference table
Rext 4571 3600 2952 3.05 3.64 4.14 4.01 5.07 6.08 4.19 5.4 6.62 4.26 5.52 6.80 I (Rext) in mA
Vout= 0.1V Vout= 0.2V Vout= 0.3V Vout= 0.4V Vout= 0.5V Vout= 0.6V Vout= 0.7V Vout= 0.8V Vout= 0.9V Vout= 1.0V
4.26 5.52 6.80
4.26 5.52 6.80
4.26 5.52 6.80
4.26 5.52 6.80
4.26 5.52 6.80
4.26 5.52 6.80
I (Rext) (Ta = 25C, VDD = 5V) - A reference table
Rext 4571 3600 2952 2.86 3.40 3.89 3.65 4.57 5.45 3.79 4.81 5.84 3.84 4.88 5.94 I (Rext) in mA
Vout= 0.1V Vout= 0.2V Vout= 0.3V Vout= 0.4V Vout= 0.5V Vout= 0.6V Vout= 0.7V Vout= 0.8V Vout= 0.9V Vout= 1.0V
3.84 4.88 5.94
3.84 4.88 5.94
3.84 4.88 5.94
3.84 4.88 5.94
3.84 4.88 5.94
3.84 4.88 5.94
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April 2004, V0.6
MBI1009
3-Channel RGB LED Lamp Driver
Current Gain and Brightness Control Code
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CLK
SDI
B4
Bit15
B3
Bit14
B2
B1
B0
Bit11
R4
Bit10
R3
Bit9
R2
Bit8
R1
Bit7
R0
Bit6
G5
Bit5
G4
Bit4
G3
Bit3
G2
Bit2
G1
Bit1
G0
Bit0
Bit13 Bit12
LE
Bit Definition of 16-Bit Brightness Control Code Bit 0 Bit 1 Bit 2 Bit 3
Meaning
Bit 4 G4
Bit 5 Bit 6 Bit 7 Bit 8 Bit 9 Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15 G5 R0 R1 R2 GRED R3 R4 B0 B1 B2 GBLUE 0 0 0 0 0 0 0 B3 B4
G0
G1
G2
G3
GGREEN
Default Value
0
0
0
0
0
0
0
0
0
Brightness Control Code for GREEN (6-bit)
Brightness Control Code for RED (5-bit)
Brightness Control Code for BLUE (5-bit)
GGREEN 0 1 2 3 4 5 6 GRED 0 1 2 3 4 5
Bit 0 G0 0 1 1 1 1 1 1 Bit 6 R0 0 1 1 1 1 1 Bit 11 B0 0 1 1 1 1 1
Bit 1 G1 0 0 1 1 1 1 1 Bit 7 R1 0 0 1 1 1 1 Bit 12 B1 0 0 1 1 1 1
Bit 2 G2 0 0 0 1 1 1 1 Bit 8 R2 0 0 0 1 1 1 Bit 13 B2 0 0 0 1 1 1
Bit 3 G3 0 0 0 0 1 1 1 Bit 9 R3 0 0 0 0 1 1 Bit 14 B3 0 0 0 0 1 1
Bit 4 G4 0 0 0 0 0 1 1 Bit 10 R4 0 0 0 0 0 1 Bit 15 B4 0 0 0 0 0 1
Bit 5 G5 0 0 0 0 0 0 1
GBLUE 0 1 2 3 4 5
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April 2004, V0.6
MBI1009
An Example
3-Channel RGB LED Lamp Driver
Setting Rext = 4571, Vout = 1.0V for OUT0 / GREEN, OUT1 / RED, and OUT2 / BLUE , then I (Rext) = 4mA If the 16-bit Configuration Code is {111111, 00000, 11110}, IOUT,GREEN = GGREEN x I (Rext) = 6 x 4mA = 24mA ; IOUT,RED = GRED x I (Rext) = 0 x 4mA = 0mA ; IOUT,BLUE = GBLUE x I (Rext) = 4 x 4mA = 16mA; The mixing multi-color is determined by IOUT,GREEN = 24mA, IOUT,RED = 0mA, and IOUT,BLUE = 16mA.
Assuming Luminous Intensity (mcd) of R/G/B LEDs are the same and I (Rext) = 4mA, we may ideally let GGREEN + GRED + GBLUE = C (Constant value) to get a stable brightness. For instance, while C = 10, that is GGREEN +GRED + GBLUE = 10, MB1009 can easily give system designers a wide range of color and brightness control in portable electronic devices.
(0, 6, 4) Total 26 color Combinations (1, 6, 3) (2, 6, 2) (3, 6, 1) (4, 6, 0)
(GGREEN, GRED, GBLUE)
(0, 5, 5) (1, 5, 4) (2, 5, 3) (3, 5, 2) (4, 5, 1) (5, 5, 0)
(1, 4, 5) (2, 4, 4) (3, 4, 3) (4, 4, 2) (5, 4, 1)
(2, 3, 5) (3, 3, 4) (3, 2, 5) (4, 3, 3) (4, 2, 4) (5, 3, 2) (5, 2, 3)
(4, 1, 5) (5, 1, 4) (5, 0, 5)
Package Outline
MBI1009CP Outline Drawing
MBI1009 Package Information
Device Type CP Package Type SSOP16-150-0.64 Weight (g) 0.07
Note: The unit for the outline drawings is mm.
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April 2004, V0.6

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