MBI5025CNS [ETC]
16-bit Constant Current LED Sink Driver; 16位恒流LED驱动器
| 型号： | MBI5025CNS |
| 厂家： | 
ETC |
| 描述： | 16-bit Constant Current LED Sink Driver |
| 文件： | 总13页 (文件大小：277K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MBI5025
Advance Information
Macroblock
16-bit Constant Current LED Sink Driver
Features
MBI5025CN/CNS
· 16 constant-current output channels
· Constant output current invariant to load voltage change：
Constant output current range: 3-50 mA
· Excellent output current accuracy:
between channels: ±3% (max.), and
between ICs: ±6% (max.)
CN: P-DIP24-300-2.54
CNS: SDIP24-300-1.78
MBI5025CD/CF
· Output current adjusted through an external resistor
· Fast response of output current, OE (min.): 400 ns
· 25MHz clock frequency
CD: SOP24-300-1.27
CF: SOP24-300-1.00
· Schmitt trigger input
· 3.3V / 5V supply voltage
MBI5025CP
SSOP24-P-150-0.64
Current Accuracy
Conditions
IOUT = 3 mA ~ 35 mA
Between Channels
Between ICs
< ±3%
< ±6%
Product Description
MBI5025 is designed for LED displays. As an enhancement of its predecessor, MBI5016,
MBI5025 exploits PrecisionDrive™ technology to enhance its output characteristics. MBI5025
contains a serial buffer and data latches which convert serial input data into parallel output
format. At MBI5025 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.
MBI5025 provides users with great flexibility and device performance while using MBI5025 in
their system design for LED display applications, e.g. LED panels. Users may adjust the output
current from 3 mA to 35 mA through an external resistor, Rext, which gives users flexibility in
controlling the light intensity of LEDs. MBI5025 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 -
MBI5025
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 No.
Pin Name
Function
24
23
22
GND
SDI
CLK
LE
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5 10
OUT6 11
1
2
3
4
5
6
7
8
9
VDD
R-EXT
SDO
Ground terminal for control logic and current
sink
1
GND
21 OE
2
3
SDI
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
Serial data is transferred to the output latch
when LE is high. The data is latched when
LE goes low.
4
LE
OUT0 ~OUT15
OE
12
OUT8
OUT7
5~20
21
Constant current output terminals
Output enable terminal
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
22
SDO
Input terminal used to connect an external
resistor for setting up output current for all
output channels
23
24
R-EXT
VDD
3.5V / 5V supply voltage terminal
January 2004, V0.9
- 2 -
MBI5025
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
January 2004, V0.9
- 3 -
MBI5025
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
H
L
SDI
Dn
SDO
Dn-15
Dn-14
Dn-13
Dn-13
Dn-13
OE
L
OUT0… OUT 7… OUT15
Dn ….. Dn - 7 ….Dn - 15
L
Dn+1
Dn+2
Dn+3
Dn+3
No Change
H
X
L
Dn + 2 ….Dn - 5 ….Dn - 13
L
Dn + 2 ….Dn - 5 ….Dn - 13
X
H
Off
January 2004, V0.9
- 4 -
MBI5025
16-bit Constant Current LED Sink Driver
Maximum Ratings
Characteristic
Symbol
VDD
Rating
0~7.0
Unit
V
Supply Voltage
Input Voltage
VIN
-0.4~VDD + 0.4
+50
V
Output Current
IOUT
mA
V
Output Voltage
VDS
-0.5~+20.0
25
Clock Frequency
GND Terminal Current
Operating Temperature
Storage Temperature
FCLK
IGND
Topr
MHz
mA
°C
1440
-40~+85
-55~+150
53.82
Tstg
°C
CN – type
CNS – type
CD– type
CF – type
CP – type
66.74
Thermal Resistance
(On PCB, Ta=25°C)
Rth(j-a)
°C/W
49.81
59.01
72.43
January 2004, V0.9
- 5 -
MBI5025
16-bit Constant Current LED Sink Driver
Recommended Operating Conditions
Characteristic
Supply Voltage
Output Voltage
Symbol
Condition
Min.
Typ.
Max.
5.5
Unit
4.5
5.0
VDD
-
V
3.0
3.3
3.6
VDS
IOUT
IOH
-
-
-
-
-
-
-
-
17.0
35
V
mA
mA
mA
V
OUT0 ~ OUT15
DC Test Circuit
3
Output Current
Input Voltage
SDO
SDO
-
-
-1.0
IOL
1.0
VIH
VIL
0.8VDD
-0.3
40
VDD+0.3
0.3VDD
-
CLK, OE , LE and SDI
CLK, OE , LE and SDI
V
tw(L)
ns
LE Pulse Width
CLK Pulse Width
tw(CLK)
tw(OE)
tsu(D)
th(D)
tsu(L)
th(L)
20
-
-
-
-
ns
ns
400
OE Pulse Width
Setup Time for SDI
Hold Time for SDI
Setup Time for LE
Hold Time for LE
Clock Frequency
VDD=4.5~5.5V
5
10
15
15
-
-
-
-
-
-
-
ns
ns
-
-
-
ns
ns
FCLK
Cascade Operation
25.0
MHz
January 2004, V0.9
- 6 -
MBI5025
16-bit Constant Current LED Sink Driver
Electrical Characteristics
Characteristic
“H” level
“L” level
Symbol
Condition
Min.
Typ.
Max.
Unit
VIH
VIL
Ta = -40~85ºC
Ta = -40~85ºC
0.8VDD
GND
-
-
VDD
V
V
Input Voltage
0.3VDD
Output Leakage Current
IOH
VOH=17.0V
-
-
0.5
μA
VOL
VOH
IOL=+1.0mA
IOH=-1.0mA
-
-
-
0.4
-
V
V
SDO
Output Voltage
4.6
IOUT1
dIOUT1
IOUT2
VDS=0.5V
Rext=1260 Ω
Rext=1260 Ω
Rext=620 Ω
Rext=620 Ω
-
-
-
-
15.0
±1
-
mA
%
Output Current 1
IOL=15mA
VDS=0.5V
±3
-
Current Skew
VDS=0.8V
30.0
±1
mA
%
Output Current 2
Current Skew
IOL=30mA
VDS=0.8V
dIOUT2
±3
Output Current vs.
Output Voltage Regulation
%/dVDS
%/dVDD
VDS within 1.0V and 3.0V
VDD within 4.5V and 5.5V
-
-
±0.1
±1
-
-
% / V
% / V
Output Current vs.
Supply Voltage Regulation
Pull-up Resistor
RIN(up)
RIN(down)
IDD(off) 1
IDD(off) 2
IDD(off) 3
IDD(on) 1
IDD(on) 2
250
500
500
9
800
KΩ
KΩ
OE
LE
Pull-down Resistor
250
800
-
-
-
-
-
-
-
-
-
-
Rext=Open,
OUT0 ~ OUT15 =Off
Rext=1260 Ω, OUT0 ~OUT15 =Off
Rext=620 Ω, OUT0 ~ OUT15 =Off
Rext=1260 Ω, OUT0 ~OUT15 =On
Rext=620 Ω, OUT0 ~ OUT15 =On
10
11
10
11
“OFF”
Supply
Current
mA
“ON”
Test Circuit for Electrical Characteristics
IDD
IOUT
VDD
OUT0
OE
.
.
.
.
IIH,IIL
CLK
LE
OUT15
SDI
SDO
GND
R -EXT
VIH,VIL
Iref
January 2004, V0.9
- 7 -
MBI5025
16-bit Constant Current LED Sink Driver
Switching Characteristics
Characteristic
Symbol
Condition
Min.
Typ.
Max.
Unit
-
-
50
50
100
100
100
-
ns
ns
ns
ns
ns
ns
ns
tpLH1
tpLH2
tpLH3
tpLH
CLK - OUTn
LE - OUTn
Propagation Delay Time
(“L” to “H”)
-
20
OE - OUTn
CLK - SDO
15
-
20
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
tpHL1
tpHL2
tpHL3
CLK - OUTn
LE - OUTn
-
Propagation Delay Time
(“H” to “L”)
-
OE - OUTn
CLK - SDO
15
20
20
400
5
20
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tpHL
tw(CLK)
tw(L)
CLK
LE
-
-
-
Pulse Width
tw(OE)
-
-
OE
Hold Time for LE
-
-
t
h(L)
Setup Time for LE
Maximum CLK Rise Time
Maximum CLK Fall Time
Output Rise Time of Iout
Output Fall Time of Iout
5
-
-
t
su(L)
-
-
500
500
200
120
tr**
-
-
tf**
tor
-
70
40
-
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
January 2004, V0.9
- 8 -
MBI5025
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
January 2004, V0.9
- 9 -
MBI5025
16-bit Constant Current LED Sink Driver
Application Information
Constant Current
To design LED displays, MBI5025 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.
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.
60
50
40
30
VDS = 1.0V
20
10
0
0
500
1000
Rext (Ω)
1500
2000
2500
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 30mA
at 620Ω and 15mA at 1260Ω.
January 2004, V0.9
- 10 -
MBI5025
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.
Load Supply Voltage (VLED)
MBI5025 are designed to operate with VDS ranging from 0.4V to 0.8V (IOUT=5~35mA)
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
MBI5025
MBI5025
January 2004, V0.9
- 11 -
MBI5025
16-bit Constant Current LED Sink Driver
Package Outline
MBI5025CNS Outline Drawing
MBI5025CD Outline Drawing
January 2004, V0.9
- 12 -
MBI5025
16-bit Constant Current LED Sink Driver
MBI5025CF Outline Drawing
MBI5025CP Outline Drawing
January 2004, V0.9
- 13 -
相关型号：
©2020 ICPDF网 联系我们和版权申明