MBI5026 [ETC]
16-bit Constant Current LED Sink Driver; 16位恒流LED驱动器
| 型号： | MBI5026 |
| 厂家： | 
ETC |
| 描述： | 16-bit Constant Current LED Sink Driver |
| 文件： | 总14页 (文件大小：384K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MBI5026
Preliminary Datasheet
Macroblock
16-bit Constant Current LED Sink Driver
Features
MBI5026CN\CNS
M
l
l
l
16 constant-current output channels
Constant output current invariant to load voltage change
Excellent output current accuracy:
between channels: <±3% (max.), and
between ICs: <±6% (max.)
CN: P-DIP24-300-2.54
CNS: SP-DIP24-300-1.78
l
l
l
l
l
l
Output current adjusted through an external resistor
Constant output current range: 5-90 mA
Fast response of output current, OE (min.): 200 ns
25MHz clock frequency
MBI5026CD\CF
Schmitt trigger input
5V supply voltage
CD: SOP24-300-1.27
CF: SOP24-300-1.00
MBI5026CP\CPA
CP\CPA: SSOP24-150-0.64
Current Accuracy
Conditions
Between Channels
Between ICs
< ±3%
< ±6%
IOUT = 10 ~ 60 mA
Product Description
MBI5026 is designed for LED displays. As an enhancement of its predecessor, MBI5016, MBI5026 exploits
PrecisionDrive™ technology to enhance its output characteristics. MBI5026 contains a serial buffer and data
latches which convert serial input data into parallel output format. At MBI5026 output stage, sixteen regulated
current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of Vf
variations.
MBI5026 provides users with great flexibility and device performance while using MBI5026 in their system design
for LED display applications, e.g. LED panels. Users may adjust the output current from 5 mA to 90 mA through an
external resistor, Rext, which gives users flexibility in controlling the light intensity of LEDs. MBI5026 guarantees to
endure maximum 17V at the output port. The high clock frequency, 25 MHz, also satisfies the system requirements
of high volume data transmission.
ÓMacroblock, Inc. 2003
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 -
MBI5026
16-bit Constant Current LED Sink Driver
Block Diagram
OUT0 OUT1
OUT14 OUT15
IO Regulator
R-EXT
VDD
16-bit Output Driver
OE
LE
16
16-bit Output Latch
16
GND
16-bit Shift Register
SDO
SDI
CLK
Terminal Description
Pin Configuration
Pin Name
Function
24
23
22
GND
SDI
CLK
LE
OUT0
OUT1
OUT2
OUT3
OUT4
1
2
3
4
5
6
7
8
9
VDD
R-EXT
SDO
Ground terminal for control logic and current
sink
GND
SDI
21 OE
Serial-data input to the shift register
20
19
18
OUT15
OUT14
OUT13
Clock input terminal for data shift on rising
edge
CLK
17 OUT12
OUT11
OUT10
OUT9
16
15
14
13
Data strobe input terminal
OUT5 10
OUT6 11
OUT7
Serial data is transferred to the output latch
when LE is high. The data is latched when
LE goes low.
LE
OUT0 ~OUT15
OE
12
OUT8
MBI5026CN\CNS\CD\CF\CP
Constant current output terminals
Output enable terminal
OUT14
OUT15
OE
SDO
R-EXT
VDD
24 OUT13
1
2
3
4
5
6
7
8
9
23
22
21
20
19
18
17
16
15
14
13
OUT12
OUT11
OUT10
OUT9
OUT8
OUT7
OUT6
When OE (active) low, the output drivers are
enabled; when OE high, all output drivers
are turned OFF (blanked).
Serial-data output to the following SDI of
next driver IC
GND
SDO
SDI
CLK
LE
OUT0 11
OUT1
OUT5
OUT4
OUT3
OUT2
Input terminal used to connect an external
resistor for setting up output current for all
output channels
10
R-EXT
VDD
12
5V supply voltage terminal
August 2003, V0.9
- 2 -
MBI5026
16-bit Constant Current LED Sink Driver
Equivalent Circuits of Inputs and Outputs
LE terminal
terminal
OE
VDD
VDD
IN
IN
CLK, SDI terminal
SDO terminal
VDD
VDD
OUT
IN
August 2003, V0.9
- 3 -
MBI5026
16-bit Constant Current LED Sink Driver
Timing Diagram
N = 0
1
2
3
4
5
6
7
8
9
10 11
12
13
14 15
CLK
SDI
LE
OE
OFF
ON
OUT0
OFF
ON
OUT1
OFF
ON
OUT2
OUT3
OFF
ON
OFF
ON
OUT15
SDO
: don’t care
Truth Table
CLK
LE
OE
SDI
OUT0 … OUT7 … OUT15
SDO
H
L
L
L
L
L
H
Dn
Dn-15
Dn-14
Dn-13
Dn-13
Dn-13
Dn ….. Dn - 7 ….Dn - 15
Dn+1
Dn+2
Dn+3
Dn+3
No Change
H
X
X
Dn + 2 ….Dn - 5 ….Dn - 13
Dn + 2 ….Dn - 5 ….Dn - 13
Off
August 2003, V0.9
- 4 -
MBI5026
16-bit Constant Current LED Sink Driver
Maximum Ratings
Characteristic
Supply Voltage
Symbol
VDD
Rating
0~7.0
-0.4~VDD + 0.4
+90
Unit
V
Input Voltage
VIN
V
Output Current
IOUT
mA
V
Output Voltage
VDS
-0.5~+20.0
25
Clock Frequency
FCLK
IGND
MHz
GND Terminal Current
1440
mA
CN – type
CNS – type
CD – type
CF – type
CP – type
CPA – type
CN – type
CNS – type
CD– type
2.32
1.87
2.51
Power Dissipation
(On PCB, Ta=25°C)
PD
W
2.12
1.73
1.73
53.82
66.74
49.81
Thermal Resistance
(On PCB, Ta=25°C)
Rth(j-a)
°C/W
CF – type
CP – type
CPA – type
59.01
72.43
72.43
Operating Temperature
Storage Temperature
Topr
Tstg
-40~+85
-55~+150
°C
°C
August 2003, V0.9
- 5 -
MBI5026
16-bit Constant Current LED Sink Driver
Electrical Characteristics
Characteristic
Supply Voltage
Symbol
VDD
VDS
IOUT
IOH
Condition
Min.
Typ.
Max.
5.5
17.0
90
Unit
V
-
4.5
5.0
Output Voltage
-
-
V
OUT0 ~ OUT15
DC Test Circuit
SDO
5
-
mA
mA
mA
V
Output Current
-
-
-1.0
1.0
VDD
0.3VDD
0.5
0.4
-
IOL
SDO
-
-
“H” level
“L” level
VIH
Ta = -40~85ºC
Ta = -40~85ºC
VOH=17.0V
IOL=+1.0mA
IOH=-1.0mA
VDS=0.6V
0.8VDD
-
Input Voltage
VIL
GND
-
V
Output Leakage Current
IOH
-
-
-
μA
V
VOL
VOH
IOUT1
-
-
SDO
Output Voltage
4.6
-
V
Output Current 1
Rext=720 Ω
Rext=720 Ω
Rext=360 Ω
Rext=360 Ω
26.25
-
mA
IOL=26.25mA
VDS=0.6V
dIOUT1
IOUT2
-
-
-
±1
52.5
±1
±3
-
%
mA
%
Current Skew
Output Current 2
VDS=0.8V
IOL=52.5mA
VDS=0.8V
dIOUT2
±3
Current Skew
Output Current vs.
Output Voltage Regulation
Output Current vs.
%/dVDS
%/dVDD
VDS within 1.0V and 3.0V
VDD within 4.5V and 5.5V
-
-
±0.1
±1
-
-
% / V
% / V
Supply Voltage Regulation
Pull-up Resistor
RIN(up)
250
500
500
7
800
800
12
KΩ
KΩ
OE
Pull-down Resistor
RIN(down)
IDD(off) 1
IDD(off) 2
IDD(off) 3
IDD(on) 1
IDD(on) 2
250
LE
-
-
-
-
-
Rext=Open, OUT0 ~OUT15 =Off
Rext=720 Ω, OUT0 ~ OUT15 =Off
Rext=360 Ω, OUT0 ~ OUT15 =Off
Rext=720 Ω, OUT0 ~ OUT15 =On
Rext=360 Ω, OUT0 ~ OUT15 =On
“OFF”
Supply
Current
10
12
10
12
12
mA
15
18
“ON”
20
Test Circuit for Electrical Characteristics
IDD
IOUT
VDD
OUT0
OE
.
.
.
.
IIH,IIL
CLK
LE
OUT15
SDI
SDO
GND
R -EXT
VIH,VIL
Iref
August 2003, V0.9
- 6 -
MBI5026
16-bit Constant Current LED Sink Driver
Switching Characteristics
Characteristic
Symbol
tpLH1
tpLH2
tpLH3
tpLH
Condition
Min.
Typ.
50
Max.
100
100
100
-
Unit
ns
-
-
CLK - OUTn
50
ns
LE - OUTn
Propagation Delay Time
(“L” to “H”)
-
20
ns
OE - OUTn
CLK - SDO
15
-
20
ns
VDD=5.0 V
VDS=0.8 V
VIH=VDD
VIL=GND
Rext=300 Ω
VL=4.0 V
RL=52 Ω
CL=10 pF
100
100
50
150
150
150
ns
tpHL1
tpHL2
tpHL3
CLK - OUTn
LE - OUTn
-
ns
Propagation Delay Time
(“H” to “L”)
-
ns
OE - OUTn
CLK - SDO
15
20
20
200
5
20
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
tpHL
CLK
LE
tw(CLK)
tw(L)
-
Pulse Width
tw(OE)
-
OE
Hold Time for LE
Setup Time for LE
Hold Time for SDI
Setup Time for SDI
-
t
t
h(L)
5
-
su(L)
th(D)
10
5
-
tsu(D)
-
Cascade
Operation
Clock Frequency
FCLK
-
-
25.0
MHz
Maximum CLK Rise Time
Maximum CLK Fall Time
-
-
-
-
-
500
500
120
200
ns
ns
ns
ns
tr**
tf**
tor
-
Output Rise Time of Vout (turn off)
Output Fall Time of Vout (turn on)
40
70
tof
**If the devices are connected in cascade and t or t is large, it may be critical to achieve the timing required for
r
f
data transfer between two cascaded devices.
Test Circuit for Switching Characteristics
IDD
IOUT
VDD
VIH,VIL
OUT0
OE
.
.
CLK
LE
Function
.
Generator
OUT15
RL
CL
SDI
SDO
GND
R -EXT
Logic input
waveform
VL
VIH = 5V
VIL = 0V
CL
Iref
tr = tf =10 ns
August 2003, V0.9
- 7 -
MBI5026
16-bit Constant Current LED Sink Driver
Timing Waveform
tW(CLK)
50%
50%
50%
CLK
SDI
tsu(D)
th(D)
50%
50%
50%
SDO
LE
tW(L)
tpLH, tpHL
50%
50%
th(L)
tsu(L)
LOW = OUTPUTS ENABLED
OE
HIGH = OUTPUT OFF
LOW = OUTPUT ON
50%
OUTn
tpLH1, tpHL1
tpLH2, tpHL2
tW(OE)
50%
OE
50%
tpLH3
tpHL3
90%
50%
10%
90%
50%
10%
OUTn
tor
tof
August 2003, V0.9
- 8 -
MBI5026
16-bit Constant Current LED Sink Driver
Application Information
Constant Current
In LED display application, MBI5026 provides nearly no variations in current from channel to channel and from IC
to IC. This can be achieved by:
1) The maximum current variation between channels is less than ±3%, and that between ICs is less than ±6%.
2) In addition, the current characteristic of output stage is flat and users can refer to the figure as shown below. The
output current can be kept constant regardless of the variations of LED forward voltages (Vf). This performs as
a perfection of load regulation.
100.00
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
1.1 1.2 1.3 1.4 1.5
2
2.5
VDS (V)
Adjusting Output Current
The output current of each channel (IOUT) is set by an external resistor, Rext. The relationship between Iout and Rext is
shown in the following figure.
100
90
80
70
60
50
40
30
20
10
0
VDS = 1.0V
0
500
1000
1500
Rext
2000
2500
3000
3500
Resistance of the external resistor, Rext, in Ω
Also, the output current can be calculated from the equation:
VR-EXT = 1.26V；IOUT = (VR-EXT / Rext ) x 15
where Rext is the resistance of the external resistor connected to R-EXT terminal and VR-EXT is the voltage of R-EXT
terminal. The magnitude of current (as a function of Rext) is around 52.5mA at 360Ω and 26.25mA at 720Ω.
August 2003, V0.9
- 9 -
MBI5026
16-bit Constant Current LED Sink Driver
Package Power Dissipation (PD)
The maximum allowable package power dissipation is determined as PD(max) = (Tj – Ta) / Rth(j-a). When 16 output
channels are turned on simultaneously, the actual package power dissipation is PD(act) = (IDD x VDD) + (IOUT x Duty
x VDS x 16). Therefore, to keep PD(act) ≤ PD(max), the allowable maximum output current as a function of duty cycle
is:
IOUT = { [ (Tj – Ta) / Rth(j-a) ] – (IDD x VDD) } / VDS / Duty / 16,
where Tj = 150°C.
Iout vs. Duty Cycle at Rth = 53.82 (°C/W)
Iout vs. Duty Cycle at Rth = 59.01 (°C/W)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
Duty Cycle
Duty Cycle
CN type package
CF type package
Iout vs. Duty Cycle at Rth = 66.74 (°C/W)
Iout vs. Duty Cycle at Rth = 72.43 (°C/W)
100
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
Duty Cycle
Duty Cycle
CNS type package
CP\CPA type package
Iout vs. Duty Cycle at Rth = 49.81 (°C/W)
100
90
80
70
60
50
40
30
20
10
0
Condition：Iout = 90mA，VDS = 1.0V，16 output
channels active
Device Type
CN
Rth(j-a)(°C/W)
53.82
Note
CNS
CD
CF
66.74
49.81
59.01
Ta = 25
Ta = 55
℃
℃
Ta = 85
℃
CP\CPA
72.43
Duty Cycle
CD type package
August 2003, V0.9
- 10 -
MBI5026
16-bit Constant Current LED Sink Driver
The maximum power dissipation, PD(max) = (Tj – Ta) / Rth(j-a), decreases as the ambient temperature increases.
Max. Power Dissipation at Various Ambient Temperature
2.50
2.25
2.00
CN Type: Rth= 53.82
1.75
CNS Type: Rth= 66.74
CD Type: Rth= 49.81
1.50
CF Type: Rth= 59.01
CP Type: Rth= 72.43
1.25
CPA Type: Rth= 72.43
1.00
0.75
0.50
10
20
30
40
50
60
70
80
90
Ambient Temperature
Load Supply Voltage (VLED)
MBI5026 are designed to operate with VDS ranging from 0.4V to 1.0V considering the package power dissipating
limits. VDS may be higher enough to make PD(act) > PD(max) when VLED = 5V and VDS = VLED – Vf, in which VLED is the
load supply voltage. In this case, it is recommended to use the lowest possible supply voltage or to set an external
voltage reducer, VDROP
A voltage reducer lets VDS = (VLED – Vf) – VDROP
Resistors or Zener diode can be used in the applications as shown in the following figures.
.
.
VLED
VLED
VDROP
VDROP
Vf
Vf
VDS
VDS
MBI5026
MBI5026
August 2003, V0.9
- 11 -
MBI5026
16-bit Constant Current LED Sink Driver
Package Outline
MBI5026CN Outline Drawing
MBI5026CNS Outline Drawing
August 2003, V0.9
- 12 -
MBI5026
16-bit Constant Current LED Sink Driver
MBI5026CD Outline Drawing
MBI5026CF Outline Drawing
August 2003, V0.9
- 13 -
MBI5026
16-bit Constant Current LED Sink Driver
MBI5026CP\CPA Outline Drawing
MBI5026 Package Information
Device Type
CN
CNS
CD
CF
Package Type
P-DIP24-300-2.54
SP-DIP24-300-1.78
SOP24-300-1.27
SOP24-300-1.00
SSOP24-150-0.64
Weight(g)
1.628
1.11
0.617
0.28
0.11
CP\CPA
Note: The unit for the outline drawing is mm.
August 2003, V0.9
- 14 -
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