SITI DD311_1

DD311
Version
: A.002
Issue Date : 2008/12/09
File Name : SP-DD311-A.002.doc
Total Pages : 19
HIGH CONSTANT CURRENT LED DRIVER
新竹市科學園區展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
DD311
HIGH CONSTANT CURRENT LED DRIVER
General Description
DD311 is a single-channel constant current LED driver, which incorporates current mirror and
current switch, designed to drive power LEDs. It can provide a maximum sink current of 1A,
adjustable by reference current input. The output current is 100 times the input current value set by
an external resistor or bias voltage. Tuning or enabling the bias voltage can provide dot correction or
global brightness control in LEDs system. The Maximum output voltage of 36V can provide more
series power LEDs in a string. The output enable allows dimming control applications.
Features
z
z
z
Maximum output current: 1A (determined by input reference current)
Minimum output voltage: 1V (Iout = 1A)
Maximum output voltage: 36V (output leakage current < 0.1uA)
z
z
Maximum output enable frequency: 1MHz
Excellent output current accuracy
Applications
z
z
z
LED architectural or entertainment lighting
LED general or specialty illumination
LED backlighting applications
Package Types
z
TO-252
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 1
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Block Diagram
VLED
Vbias
IREF
ILED
REXT
OUT
EN
1 : 100
VSS
GND
1
2
3
4
5
REXT
OUT
GND
VSS
EN
Pin Connection
Pin Description
PIN No.
PIN NAME
FUNCTION
1
REXT
Reference current input terminal.
2
OUT
Sink constant current outputs (open-drain).
3
GND
Ground terminal.
4
VSS
Ground terminal.
5
EN
Output current enable terminal:
VEN = 0V, output current is turned OFF.
VEN > 3.3V, output current is turned ON.
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 2
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Maximum Ratings (Ta=25°C, Tj(max) = 125°C)
CHARACTERISTIC
SYMBOL
RATING
UNIT
Input Reference Current
IREF
10
mA
Output Current
Iout
1.0
A
Output Voltage
Vout
-0.3 ~ 36
Enable Voltage
VEN
-0.3 ~ 18
Output Enable Frequency
FEN
1
MHz
GND Terminal Current
IGND
1.01
A
Power Dissipation
Pd
4.2 (Ta=25°C)
W
Thermal Resistance (Junction to Air)
Rth(j-a)
23.38
Thermal Resistance (Junction to Case)
Rth(j-c)
1.77
Operating Temperature
Top
-40 ~ 85
Storage Temperature
Tstg
-55 ~ 150
V
°C/W
°C
Recommended Operating Condition
CHARACTERISTIC
Bias Voltage
SYMBOL
CONDITION
MIN.
TYP.
MAX.
force REXT terminal directly
⎯
⎯
2.7
with an external resistor
5
⎯
36
1
⎯
⎯
UNIT
Vbias
V
*1
Output Voltage
Vout
Driver On
Output Voltage
Vout
Driver Off
*2
⎯
⎯
36
Output Current
Iout
Ven > 3.3V
⎯
⎯
1
3.3
⎯
18
-0.3
⎯
0.0
DC
⎯
1
V
VEN(IH)
IREF = 1mA ~ 10mA
Input Enable Voltage
VEN(IL)
Input Enable Frequency
*1
*2
A
FEN
Ven > 3.3V
V
MHz
Notice that the power dissipation is limited to its package and ambient temperature.
The driver output voltage including any overshoot stress has to be compliant with the maximum voltage (33V).
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 3
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Electrical Characteristics (Ta = 25°C unless otherwise noted)
CHARACTERISTIC
SYMBOL
Input Enable Voltage “H” Level
CONDITION
VEN(IH)
MIN.
TYP.
MAX.
3.3
⎯
18
UNIT
IREF = 1mA ~ 10mA
Input Enable Voltage “L” Level
Output Leakage Current
V
VEN(IL)
Vout = 36 V
Ven = 0V
IOL1
Output Current Skew
(Chip-to-Chip)
IOL2
*1
Ambient Temperature Regulation
η1
IREF = 1mA ~ 10mA
-0.3
⎯
0.0
⎯
⎯
0.1
uA
⎯
± 0.5
± 10
%
⎯
0.01
⎯
% / °C
⎯
0.05
⎯
mA / °C
⎯
1.5
10
%/V
Vout = 1.0 V
Ambient Temperature Regulation
Output Voltage Regulation
η2
% / Vout
IREF = 1mA ~ 10mA
Vout = 1V ~ 3V
Switching Characteristics (Ta = 25°C unless otherwise noted)
CHARACTERISTIC
Propagation Delay
(‘L to ‘H’)
Propagation Delay
(‘H’ to ‘L’)
SYMBOL
EN-to-OUT
(Driver On)
tpLH
EN-to-OUT
(Driver Off)
tpHL
Output Current Rise Time
CONDITION
MIN.
TYP.
MAX.
IREF = 10mA
⎯
10
⎯
⎯
50
⎯
UNIT
(Iout = 1A)
VEN(IH) = 5V
VEN(IL) = 0V
tor
VL = 12V
ns
⎯
25
⎯
⎯
50
⎯
RL = 10 Ω
Output Current Fall Time
tof
CL = 13 pF
*1
Chip-to-Chip skew is defined as the range into which any ratio between output current and reference current of any IC
falls.
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 4
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
VL
IREF
RL
Optional
REXT
R
CLED
OUT
Optional
EN
VSS
C
GND
CL
Switching Characteristics Test Circuit
Transient Characteristics
In order to reduce the overshoot or undershoot(Vout) during switching large current, it is
recommended adding a large enough capacitor between VLED and GND to keep LED supply
voltage(VLED) stable. The longer rise time and fall time of the EN dimming signal, adjustable by
RC filter, produce the smooth transient response of output current. The two output waveforms
illustrating the EN dimming signal with and without RC filter are given below:
without RC filter
HIGH CONSTANT CURRENT LED DRIVER
with RC filter
Version:A.002
Page 5
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Constant-Current Output
Constant-current value is set by the reference current input. The output current will be 100
times the input current value produced by an external resistor between the REXT pin and the bias
voltage*2 or, alternatively, force the low bias voltage to REXT pin. Varying the resistor or the bias
voltage value can adjust the current scale ranging up to 1A. Notice that the output current is a little
increasing or decreasing until the device temperature and ambient temperature are balance. The
output current value is calculated roughly by the following equation:
ILED (A) ~ 100 × ( Vbias- VREXT ) / REXT (ohm) = 100 × IREF (A)
*2
The variation of bias voltage influences the output stability directly.
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 6
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Output Current as a Function of REXT value
1100
1000
Vbias=36V
ILED (mA)
900
Vbias=24V
800
Vbias=18V
700
Vbias=12V
600
Vbias=5V
500
400
300
200
100
0
100
1000
10000
100000
REXT (ohm)
VLED
ILED
Vbias
IREF
REXT
DD311
1
VREXT
HIGH CONSTANT CURRENT LED DRIVER
2
3
4
5
EN
Version:A.002
Page 7
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
VLED
DD311
Vbias
DD311
ILED
1
2
3
4
5
EN
Output Current as a Function of Vbias
1100
ILED (mA)
1000
900
VEN = 5V
800
Vout = 1V
700
600
500
400
300
200
100
0
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Vbias (volt)
Output Current as a Function of Output Voltage
1.2
Iout = 1A
1.0
Iout=750m
Iout (A)
0.8
Iout=500m
0.6
Iout=350m
0.4
0.2
Iout=100m
0.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
Vout (volt)
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 8
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Ambient Temperature vs. Output Current
1100
1007.0
Iout=1A
1000
1006.5
900
Iout=750mA
1006.0
700
Iout (mA)
Iout (mA)
800
600
Iout=500mA
500
Iout=350mA
400
1005.5
1005.0
1004.5
300
200
Vout = 1V, VEN = 12V
Iout=100mA
100
Vout = 1V
VEN = 12V
1004.0
0
1003.5
-60
-40
-20
0
20
40
60
80
100
120
140
-60
-40
Ambient Temperature (°C)
0
20
40
60
80
100
120
140
120
140
120
140
Ambient Temperature (°C)
505
762
504
761
503
Iout (mA)
760
Iout (mA)
-20
759
758
757
501
500
499
Vout = 1V
VEN = 12V
756
502
Vout = 1V
VEN = 12V
498
497
755
-60
-40
-20
0
20
40
60
80
100
120
-60
140
-40
-20
0
20
40
60
80
100
Ambient Temperature (°C)
Ambient Temperature (°C)
357
102.0
101.8
356
101.6
Iout (mA)
Iout (mA)
101.4
355
354
353
101.0
100.8
100.6
100.4
Vout = 1V
VEN = 12V
352
101.2
Vout = 1V
VEN = 12V
100.2
100.0
351
99.8
-60
-40
-20
0
20
40
60
80
100
120
Ambient Temperature (°C)
HIGH CONSTANT CURRENT LED DRIVER
140
-60
-40
-20
0
20
40
60
80
100
Ambient Temperature (°C)
Version:A.002
Page 9
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Enable Voltage vs. Output Current
1100
1020
Iout=1A
1000
900
700
600
Iout (mA)
Iout (mA)
1010
Iout=750mA
800
Iout=500mA
500
Iout=350mA
400
1000
990
300
Vout = 1V
980
Vout = 1V, Ta = 25°C
200
Ta = 25°C
Iout=100mA
100
970
0
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
8
VEN (volt)
10
12
14
16
18
20
18
20
VEN (volt)
509
764
762
508
Iout (mA)
Iout (mA)
760
758
756
754
Vout = 1V
752
Ta = 25°C
507
Vout = 1V
506
Ta = 25°C
750
505
0
2
4
6
8
10
12
14
16
18
0
20
2
4
6
353.5
100.80
353.0
100.75
352.5
Vout = 1V
352.0
8
10
12
14
16
V EN (volt)
Iout (mA)
Iout (mA)
VEN (volt)
100.70
Vout = 1V
100.65
Ta = 25°C
Ta = 25°C
351.5
100.60
0
2
4
6
8
10
12
14
16
18
VEN (volt)
HIGH CONSTANT CURRENT LED DRIVER
20
0
2
4
6
8
10
12
14
16
18
20
VEN (volt)
Version:A.002
Page 10
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Power Dissipation
Notice that the power dissipation of a semiconductor chip is limited to its package and ambient
temperature, in which the device requires the maximum output current calculated for given
operating conditions. The maximum allowable power consumption can be calculated by the
following equation:
Pd(max)(Watt) =
Tj(junction temperature)(max)(°C)– Ta(ambient temperature)(°C)
Rth(junction-to-air thermal resistance)(°C/Watt)
The relationship between power dissipation and operating temperature can be refer to the figure
below:
5.0
Power Dissipation Pd(W)
4.5
Tj(max)=125 °C
4.0
Rth=23.38 °C/Watt
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
20
40
60
80
100
120
140
Ambient Temperature Ta(°C)
Based on the Pd(max), the maximum allowable voltage of output terminal can be calculated as
follows:
Vout(max)(Volt) =
HIGH CONSTANT CURRENT LED DRIVER
Pd(max)(Watt)– VREXT(Volt) × IREF(A)
Iout(A) × Dimming Duty
Version:A.002
Page 11
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Typical Application
VLED
DD311
REXT
ILED
1
2
3
4
5
EN
Series String (Suggested)
VLED
Optional
In
I2
I1
DD311
REXT
1
2
3
4
5
EN
ILED = I1+ I2+ … + In
Paralleled Strings
VLED
Optional
In
I2
I1
REXT
Optional
DD311
1
2
3
4
5
EN
ILED = I1+ I2+ … + In
Cross Connected Paralleled Strings
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 12
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
ILED
PWM
(synchronization to EN)
or
Level Shift
(Vbias or IREF)
ILED
PWM signal
(synchronization to EN)
REXT
REXT
Vbias
1
1
3
4
2
3
4
5
EN
ILED
EN
1
2
3
4
DD311
5
REXT
1
2
3
4
DD311
5
Global Brightness Control
REXT
EN
EN
PWM
(synchronization to EN)
or
Level Shift
(Vbias or IREF)
ILED
ILED
VLED
VLED
REXT
REXT
1
1
switch
Vbias
3
4
2
3
4
DD311
2
DD311
5
5
GND
EN
GND
EN
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
Dot Correction (compensation data from sensing LEDs)
5
ILED
PWM
(synchronization to EN)
or
Level Shift
(Vbias or IREF)
DD311
2
DD311
Vbias
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DD311
Typical Application
Page 13
ILED
HIGH CONSTANT CURRENT LED DRIVER
1
2
3
4
DD311
5
ILED
REXT
VCC
1
2
Version:A.002
grayscale control and color manipulation.
of DD311 and DM413 offers an ideal solution for high end
grayscale signal to control a set of three DD311. The combination
input, DM413 can generate maximum of 14 bits RGB PWM
configured to act as PWM signal generator. Through serial data
typical application, a PWM enabled RGB driver DM413 is
system will adapt to precise dimming control. In this display of a
capability. By connecting ENABLE pin to a PWM signal output,
switching signal (1Mhz max) while providing high current driving
3
4
DD311
DD311 is specifically designed to withstand high frequency
REXT
VCC
5
11
10
9
6
7
8
12
13
5
14
4
16
15
3
3
2
2
1
1
4
5
GND
VCC
DD311
DM413
VCC
REXT
Pull-High Resistance
ILED
VLED
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Typical Application
Page 14
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Package Outline Dimension
TO-252
HIGH CONSTANT CURRENT LED DRIVER
Unit: inch/mm
Version:A.002
Page 15
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
Product Ordering Information
Part Number
DD311-TO252EX
Package Type
TO252-1.27
(Exposed Pad)
HIGH CONSTANT CURRENT LED DRIVER
Number / Weight ( typ.)
Tube / Tray
Reel ( Box included )
80pcs / Tube
0.046kg ± 5%
-
Version:A.002
Page 16
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
DD311-TO252EX Package and Weight(4 Boxes Set)
TO252 - 1.27 ( Exposed Pad )
IC
TO252
80 pcs ICs per Tube
Tube
53cm
Box
40 Tubes per Box
17cm
10cm
61cm
4 Boxes per Carton
Carton
35cm
24cm
64cm
Weight
Item
1
2
3
4
Description
80 pcs DD311-TO252EX per Tube
Net Weight of one Box
Net Weight of one Carton
Weight ( Kg )
0.046±5%
0.40±5%
1.24±5%
Per Carton Set ( 4 Boxes, 12,800 pcs )
HIGH CONSTANT CURRENT LED DRIVER
10.20±5%
Version:A.002
Page 17
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
DD311-TO252EX Package and Weight(6 Boxes Set)
TO252 - 1.27 ( Exposed Pad )
IC
TO252
80 pcs ICs per Tube
Tube
53cm
Box
40 Tubes per Box
17cm
10cm
61cm
6 Boxes per Carton
Carton
35cm
34cm
64cm
Weight
Item
1
2
3
4
Description
80 pcs DD311-TO252EX per Tube
Net Weight of one Box
Net Weight of one Carton
Weight ( Kg )
0.046±5%
0.40±5%
1.44±5%
Per Carton Set ( 6 Boxes, 19,200 pcs )
HIGH CONSTANT CURRENT LED DRIVER
14.88±5%
Version:A.002
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點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
新竹市科學園區展業一路 9 號 7 樓之 1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656
Fax:886-3-5645626
DD311
The products listed herein are designed for ordinary electronic applications, such as
electrical appliances, audio-visual equipment, communications devices and so on. Hence,
it is advisable that the devices should not be used in medical instruments, surgical
implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention
equipment and the like. Misusing those products may directly or indirectly endanger
human life, or cause injury and property loss.
Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage
of the products mentioned above. Anyone who purchases any products described herein
with the above-mentioned intention or with such misused applications should accept full
responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all
their officers and employees shall defend jointly and severally against any and all claims
and litigation and all damages, cost and expenses associated with such intention and
manipulation.
HIGH CONSTANT CURRENT LED DRIVER
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