ETC MBI5026CPA

Macroblock
MBI5026
Preliminary Datasheet
16-bit Constant Current LED Sink Driver
Features
MBI5026CN\CNS
MBI5016CNS
MBI5016CNS
l
16 constant-current output channels
l
Constant output current invariant to load voltage change
l
Excellent output current accuracy:
between channels: <±3% (max.), and
CN: P-DIP24-300-2.54
between ICs: <±6% (max.)
CNS: SP-DIP24-300-1.78
l
Output current adjusted through an external resistor
l
Constant output current range: 5-90 mA
l
Fast response of output current, OE (min.): 200 ns
l
25MHz clock frequency
l
Schmitt trigger input
l
5V supply voltage
MBI5016CF
MBI5026CD\CF
MBI5016CF
CD: SOP24-300-1.27
CF: SOP24-300-1.00
MBI5026CP\CPA
MBI5016CP
Current Accuracy
Between Channels
Between ICs
< ±3%
< ±6%
CP\CPA: SSOP24-150-0.64
Conditions
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: [email protected]
-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
16
16-bit Output Latch
LE
16
GND
16-bit Shift Register
SDI
SDO
CLK
Terminal Description
Pin Configuration
Pin Name
Function
GND
Ground terminal for control logic and current
sink
SDI
Serial-data input to the shift register
CLK
Clock input terminal for data shift on rising
edge
Data strobe input terminal
LE
Serial data is transferred to the output latch
when LE is high. The data is latched when
LE goes low.
GND 1
SDI
2
CLK 3
LE
4
OUT0 5
OUT1 6
OUT2 7
OUT3 8
OUT4 9
OUT5 10
OUT6 11
OUT7 12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
R-EXT
SDO
OE
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
MBI5026CN\CNS\CD\CF\CP
OUT0 ~ OUT15 Constant current output terminals
Output enable terminal
OE
SDO
R-EXT
VDD
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
Input terminal used to connect an external
resistor for setting up output current for all
output channels
5V supply voltage terminal
OUT14 1
OUT15 2
OE
3
SDO
4
R-EXT 5
VDD
6
GND
7
8
SDI
CLK
9
LE
10
OUT0 11
OUT1 12
24
23
22
21
20
19
18
17
16
15
14
13
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
MBI5026CPA
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Equivalent Circuits of Inputs and Outputs
LE terminal
OE terminal
VDD
VDD
IN
IN
CLK, SDI terminal
SDO terminal
VDD
VDD
OUT
IN
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August 2003, V0.9
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
OUT0
ON
OFF
OUT1
ON
OFF
OUT2
ON
OFF
OUT3
ON
OFF
OUT15
ON
SDO
: don’t care
Truth Table
CLK
LE
OE
SDI
OUT 0 … OUT 7 … OUT15
SDO
H
L
Dn
Dn ….. Dn - 7 …. Dn - 15
Dn-15
L
L
Dn+1
No Change
Dn-14
H
L
Dn+2
Dn + 2 …. Dn - 5 …. Dn - 13
Dn-13
X
L
Dn+3
Dn + 2 …. Dn - 5 …. Dn - 13
Dn-13
X
H
Dn+3
Off
Dn-13
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Maximum Ratings
Characteristic
Symbol
Rating
Unit
Supply Voltage
VDD
0~7.0
V
Input Voltage
VIN
-0.4~VDD + 0.4
V
Output Current
IOUT
+90
Output Voltage
VDS
-0.5~+20.0
Clock Frequency
FCLK
25
MHz
GND Terminal Current
IGND
1440
mA
Power Dissipation
(On PCB, Ta=25°C)
Thermal Resistance
(On PCB, Ta=25°C)
CN – type
2.32
CNS – type
1.87
CD – type
PD
CF – type
2.51
2.12
CP – type
1.73
CPA – type
1.73
CN – type
53.82
CNS – type
66.74
CD– type
Rth(j-a)
CF – type
49.81
59.01
CP – type
72.43
CPA – type
72.43
mA
V
W
°C/W
Operating Temperature
Topr
-40~+85
°C
Storage Temperature
Tstg
-55~+150
°C
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Electrical Characteristics
Characteristic
Symbol
Condition
Min.
Typ.
Max.
Unit
Supply Voltage
VDD
-
4.5
5.0
5.5
V
Output Voltage
VDS
OUT0 ~ OUT15
-
-
17.0
V
IOUT
DC Test Circuit
5
-
90
mA
IOH
SDO
-
-
-1.0
mA
IOL
SDO
-
-
1.0
mA
“H” level
VIH
Ta = -40~85ºC
0.8VDD
-
VDD
V
“L” level
VIL
Ta = -40~85ºC
GND
-
0.3VDD
V
IOH
VOH=17.0V
-
-
0.5
μA
VOL
IOL=+1.0mA
-
-
0.4
V
VOH
IOH=-1.0mA
4.6
-
-
V
Output Current 1
IOUT1
VDS=0.6V
Rext=720 Ω
-
26.25
-
mA
Current Skew
dIOUT1
IOL=26.25mA
VDS=0.6V
Rext=720 Ω
-
±1
±3
%
Output Current 2
IOUT2
VDS=0.8V
Rext=360 Ω
-
52.5
-
mA
dIOUT2
IOL=52.5mA
VDS=0.8V
Rext=360 Ω
-
±1
±3
%
Output Current
Input Voltage
Output Leakage Current
Output Voltage
SDO
Current Skew
Output Current vs.
Output Voltage Regulation
Output Current vs.
Supply Voltage Regulation
%/dVDS
VDS within 1.0V and 3.0V
-
±0.1
-
%/V
%/dVDD
VDD within 4.5V and 5.5V
-
±1
-
%/V
Pull-up Resistor
RIN(up)
OE
250
500
800
KΩ
Pull-down Resistor
RIN(down)
LE
250
500
800
KΩ
=Off
-
7
12
“OFF”
Supply
Current
“ON”
IDD(off) 1
Rext=Open,
IDD(off) 2
Rext=720 Ω,
OUT0 ~ OUT15
=Off
-
10
12
IDD(off) 3
Rext=360 Ω,
OUT0 ~ OUT15
=Off
-
12
15
IDD(on) 1
Rext=720 Ω,
OUT0 ~ OUT15
=On
-
10
18
IDD(on) 2
Rext=360 Ω,
OUT0 ~ OUT15
=On
-
12
20
OUT0 ~ OUT15
mA
Test Circuit for Electrical Characteristics
IDD
VDD
IIH,IIL
IOUT
..
..
OUT0
OE
CLK
LE
OUT15
SDI
R - EXT GND
SDO
VIH, VIL
Iref
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Switching Characteristics
Characteristic
Propagation Delay Time
(“L” to “H”)
Propagation Delay Time
(“H” to “L”)
Symbol
Condition
Min.
Typ.
Max.
Unit
CLK - OUTn
tpLH1
-
50
100
ns
LE - OUTn
tpLH2
-
50
100
ns
OE - OUTn
tpLH3
-
20
100
ns
CLK - SDO
tpLH
15
20
-
ns
CLK - OUTn
tpHL1
-
100
150
ns
LE - OUTn
tpHL2
-
100
150
ns
OE - OUTn
tpHL3
-
50
150
ns
CLK - SDO
tpHL
15
20
-
ns
20
-
-
ns
CLK
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
tw(CLK)
LE
tw(L)
20
-
-
ns
OE
tw(OE)
200
-
-
ns
Hold Time for LE
th(L)
5
-
-
ns
Setup Time for LE
tsu(L)
5
-
-
ns
Hold Time for SDI
th(D)
10
-
-
ns
Setup Time for SDI
tsu(D)
5
-
-
ns
-
-
25.0
MHz
Pulse Width
Cascade
Operation
Clock Frequency
FCLK
Maximum CLK Rise Time
tr**
-
-
500
ns
Maximum CLK Fall Time
tf**
-
-
500
ns
Output Rise Time of Vout (turn off)
tor
-
40
120
ns
Output Fall Time of Vout (turn on)
tof
-
70
200
ns
**If the devices are connected in cascade and tr or tf is large, it may be critical to achieve the timing required for
data transfer between two cascaded devices.
Test Circuit for Switching Characteristics
IDD
VIH, VIL
Function
Generator
VDD
IOUT
..
.
OUT0
OE
CLK
LE
OUT15
RL
SDI
R - EXT GND
SDO
CL
Logic input
waveform
VIH = 5V
VL
CL
Iref
VIL = 0V
tr = tf = 10 ns
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Timing Waveform
tW(CLK)
tsu(D)
SDI
50%
50%
CLK
50%
50%
th(D)
50%
SDO
50%
tW(L)
tpLH, tpHL
LE
50%
50%
th(L)
OE
tsu(L)
LOW = OUTPUTS ENABLED
HIGH = OUTPUT OFF
50%
OUTn
tpLH1, tpHL1
LOW = OUTPUT ON
tpLH2, tpHL2
tW(OE)
OE
50%
50%
tpLH3
tpHL3
90%
50%
10%
OUTn
tof
-8-
90%
50%
10%
tor
August 2003, V0.9
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
Iout (mA)
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
IOUT (mA)
shown in the following figure.
100
90
80
70
60
50
40
30
20
10
0
VDS = 1.0V
0
500
1000
1500
2000
2500
3000
3500
Rext
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.
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August 2003, V0.9
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
90
80
80
70
70
60
90
Iout(mA)
80
70
60
50
40
30
20
10
Duty Cycle
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
20%
0
15%
95%
100%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
Iout vs. Duty Cycle at Rth = 72.43 (°C/W)
Iout vs. Duty Cycle at Rth = 66.74 (°C/W)
100
10%
30%
CF type package
CN type package
5%
25%
Duty Cycle
Duty Cycle
Iout(mA)
20%
95%
100%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
0
20%
10
0
15%
20
10
5%
30
20
10%
40
30
15%
50
40
5%
50
100
90
80
70
60
50
40
30
20
10
0
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
Iout(mA)
60
10%
Iout(mA)
100
Duty Cycle
CNS type package
CP\CPA type package
Iout vs. Duty Cycle at Rth = 49.81 (°C/W)
100
90
Condition：Iout = 90mA，VDS = 1.0V，16 output
channels active
Device Type
Rth(j-a)(°C/W)
Note
CN
53.82
CNS
66.74
Ta = 25℃
Ta = 55℃
CD
49.81
Ta = 85℃
CF
59.01
CP\CPA
72.43
70
60
50
40
30
20
10
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
20%
15%
5%
0
10%
Iout(mA)
80
Duty Cycle
CD type package
- 10 -
August 2003, V0.9
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
Power Dissipation
2.25
2.00
CN T ype: Rth= 53.82
1.75
CNS Type: Rth= 66.74
CD T ype: Rth= 49.81
1.50
CF Type: Rth= 59.01
1.25
CP T ype: Rth= 72.43
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
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
Package Outline
MBI5026CN Outline Drawing
MBI5026CNS Outline Drawing
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
MBI5026CD Outline Drawing
MBI5026CF Outline Drawing
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August 2003, V0.9
MBI5026
16-bit Constant Current LED Sink Driver
MBI5026CP\CPA Outline Drawing
MBI5026 Package Information
Device Type
CN
CNS
CD
CF
CP\CPA
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
Note: The unit for the outline drawing is mm.
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August 2003, V0.9