View DD3111_4797141.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

DD311
Version : A.002 Issue Date : 2008/12/09 File Name : SP-DD311-A.002.doc Total Pages : 19
HIGH CONSTANT CURRENT LED DRIVER
9 7 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel886-3-5645656 Fax886-3-5645626
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
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 Maximum output current: 1A (determined by input reference current) Minimum output voltage: 1V (Iout = 1A) Maximum output voltage: 36V (output leakage current < 0.1uA) Maximum output enable frequency: 1MHz Excellent output current accuracy
Applications LED architectural or entertainment lighting LED general or specialty illumination LED backlighting applications
Package Types TO-252
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 1
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Block Diagram
Vbias VLED
IREF
ILED
REXT
OUT EN
1 : 100 VSS GND
Pin Connection
1
2
3
4
5
GND
REXT
Pin Description
PIN No. 1 2 3 4 PIN NAME REXT OUT GND VSS FUNCTION Reference current input terminal. Sink constant current outputs (open-drain). Ground terminal. Ground terminal. Output current enable terminal: VEN = 0V, output current is turned OFF. VEN > 3.3V, output current is turned ON.
5
EN
HIGH CONSTANT CURRENT LED DRIVER
OUT
VSS
EN
Version:A.002
Page 2
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Maximum Ratings (Ta=25C, Tj(max) = 125C)
CHARACTERISTIC Input Reference Current Output Current Output Voltage Enable Voltage Output Enable Frequency GND Terminal Current Power Dissipation Thermal Resistance (Junction to Air) Thermal Resistance (Junction to Case) Operating Temperature Storage Temperature SYMBOL IREF Iout Vout VEN FEN IGND Pd Rth(j-a) Rth(j-c) Top Tstg RATING 10 1.0 -0.3 ~ 36 V -0.3 ~ 18 1 1.01 4.2 (Ta=25C) 23.38 1.77 -40 ~ 85 -55 ~ 150 C MHz A W C/W UNIT mA A
Recommended Operating Condition
CHARACTERISTIC SYMBOL CONDITION force REXT terminal directly Bias Voltage Vbias with an external resistor Output Voltage Output Voltage Output Current Vout Vout Iout VEN(IH) Input Enable Voltage VEN(IL) Input Enable Frequency FEN Ven > 3.3V IREF = 1mA ~ 10mA -0.3 DC 0.0 1 MHz Driver On Driver Off
*1
MIN. 5 1 3.3
TYP.
MAX. 2.7
UNIT
V 36 V
*2
36 1 18 V A
Ven > 3.3V
*1 *2
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). Version:A.002 Page 3
HIGH CONSTANT CURRENT LED DRIVER
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Electrical Characteristics (Ta = 25C unless otherwise noted)
CHARACTERISTIC Input Enable Voltage "H" Level SYMBOL VEN(IH) IREF = 1mA ~ 10mA Input Enable Voltage "L" Level VEN(IL) Vout = 36 V Ven = 0V -0.3 0.0 CONDITION MIN. 3.3 TYP. MAX. 18 V UNIT
Output Leakage Current Output Current Skew (Chip-to-Chip)
*1
IOL1
0.1
uA
IOL2 IREF = 1mA ~ 10mA Vout = 1.0 V
0.5
10
%
Ambient Temperature Regulation
1
0.01
% / C
Ambient Temperature Regulation
2
IREF = 1mA ~ 10mA Vout = 1V ~ 3V
0.05
mA / C
Output Voltage Regulation
% / Vout
1.5
10
%/V
Switching Characteristics (Ta = 25C unless otherwise noted)
CHARACTERISTIC Propagation Delay (`L to `H') Propagation Delay (`H' to `L') Output Current Rise Time EN-to-OUT (Driver On) EN-to-OUT (Driver Off) SYMBOL tpLH CONDITION IREF = 10mA (Iout = 1A) tpHL VEN(IH) = 5V VEN(IL) = 0V tor VL = 12V RL = 10 Output Current Fall Time tof CL = 13 pF 50 25 50 ns MIN. TYP. 10 MAX. UNIT
*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
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
VL
IREF RL Optional R REXT EN C VSS GND CL OUT CLED Optional
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
with RC filter
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 5
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
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 x ( Vbias VREXT ) / REXT (ohm) = 100 x IREF (A)
*2
The variation of bias voltage influences the output stability directly. Version:A.002 Page 6
HIGH CONSTANT CURRENT LED DRIVER
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Output Current as a Function of REXT value
1100 1000 900 800 700 Vbias=36V Vbias=24V Vbias=18V Vbias=12V Vbias=5V
ILED (mA)
600 500 400 300 200 100 0 100 1000 10000
100000
REXT (ohm)
VLED Vbias
ILED
IREF
REXT
DD311
1 2 3 4 5
VREXT
EN
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 7
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Vbias
VLED
ILED
DD311
1 2 3 4 5
EN
Output Current as a Function of Vbias
1100 1000 900 800
VEN = 5V Vout = 1V
ILED (mA)
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
0.8
Iout (A)
0.6 0.4
Iout=500m Iout=350m
0.2 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
Iout=100m
2.6
2.8
3.0
Vout (volt)
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 8
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Ambient Temperature vs. Output Current
1100 1000 900 800
Iout=1A
1007.0 1006.5
Iout=750mA
1006.0
Iout (mA)
Iout (mA)
700 600 500 400 300 200 100 0 -60 -40 -20 0 20 40 60 80 100 120 140
1005.5 1005.0 1004.5
Iout=500mA Iout=350mA
Vout = 1V, VEN = 12V
Iout=100mA
1004.0 1003.5 -60 -40
Vout = 1V VEN = 12V
-20
0
20
40
60
80
100
120
140
Ambient Temperature (C)
Ambient Temperature (C)
762 761 760
505 504 503
Iout (mA)
759 758 757 756 755 -60 -40 -20 0 20 40 60 80 100 120 140
Iout (mA)
Vout = 1V VEN = 12V
502 501 500 499 498 497 -60 -40 -20 0 20 40 60 80 100 120 140
Vout = 1V VEN = 12V
Ambient Temperature (C)
Ambient Temperature (C)
357 356 355 354 353 352 351 -60 -40 -20 0 20 40 60 80 100 120 140
102.0 101.8 101.6 101.4
Iout (mA)
Iout (mA)
Vout = 1V VEN = 12V
101.2 101.0 100.8 100.6 100.4 100.2 100.0 99.8 -60 -40 -20 0 20 40 60 80 100 120 140
Vout = 1V VEN = 12V
Ambient Temperature (C)
Ambient Temperature (C)
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 9
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Enable Voltage vs. Output Current
1100 1000 900 800
Iout=1A
1020
Iout=750mA
1010
Iout (mA)
Iout (mA)
700 600 500 400 300 200 100 0 0 2 4 6 8 10 12 14 16 18 20
1000
Iout=500mA Iout=350mA
990
Vout = 1V, Ta = 25C
980
Iout=100mA
Vout = 1V Ta = 25C
970 0 2 4 6 8 10 12 14 16 18 20
VEN (volt)
VEN (volt)
764 762 760
509
508
Iout (mA)
758 756 754 752 750 0 2 4 6 8 10 12 14 16 18 20
Iout (mA)
507
Vout = 1V Ta = 25C
506
Vout = 1V Ta = 25C
505 0 2 4 6 8 10 12 14 16 18 20
VEN (volt)
VEN (volt)
353.5
100.80
353.0
100.75
Iout (mA)
352.5
Iout (mA)
Vout = 1V Ta = 25C
100.70
352.0
100.65
Vout = 1V Ta = 25C
351.5 0 2 4 6 8 10 12 14 16 18 20
100.60 0 2 4 6 8 10 12 14 16 18 20
VEN (volt)
VEN (volt)
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 10
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
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 4.5
Power Dissipation Pd(W)
4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 20 40 60 80
Tj(max)=125 C Rth=23.38 C/Watt
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) = Pd(max)(Watt)- VREXT(Volt) x IREF(A) Iout(A) x Dimming Duty
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 11
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Typical Application
VLED
ILED
REXT
DD311
1 2 3 4 5
EN
Series String (Suggested)
VLED
Optional
In
I2
I1
REXT
DD311
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
Vbias Vbias
Vbias
PWM signal (synchronization to EN)
switch
VLED
Typical Application
ILED
REXT ILED ILED
DD311
REXT REXT
3 4 5 5 4 1 2 3 1 2
DD311
DD311
3 4 5
1
2
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
HIGH CONSTANT CURRENT LED DRIVER
SILICON TOUCH TECHNOLOGY INC.
EN EN EN
GND
Global Brightness Control
PWM (synchronization to EN) or Level Shift (Vbias or IREF) PWM (synchronization to EN) or Level Shift (Vbias or IREF)
PWM (synchronization to EN) or Level Shift (Vbias or IREF)
VLED
Version:A.002
ILED REXT
ILED
REXT
DD311
3 4 5 1 2
DD311
3 4 5
ILED
REXT
DD311
1 2 3 4 5
1
2
EN
EN
EN
GND
Page 13
DD311
Dot Correction (compensation data from sensing LEDs)
VLED
Typical Application
VCC
VCC
VCC
ILED
REXT ILED ILED
DD311
REXT REXT
1 4 5 2 3 1 2 3
DD311
DD311
4 5
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
HIGH CONSTANT CURRENT LED DRIVER
SILICON TOUCH TECHNOLOGY INC.
VCC
Pull-High Resistance
1 2 3 4 5 6 7 8 16 15 14
1
2
3
4
5
DD311 is specifically designed to withstand high frequency
switching signal (1Mhz max) while providing high current driving
capability. By connecting ENABLE pin to a PWM signal output,
system will adapt to precise dimming control. In this display of a
typical application, a PWM enabled RGB driver DM413 is
Version:A.002
configured to act as PWM signal generator. Through serial data
DM413
13 12 11 10 9
input, DM413 can generate maximum of 14 bits RGB PWM
grayscale signal to control a set of three DD311. The combination
of DD311 and DM413 offers an ideal solution for high end
GND
grayscale control and color manipulation.
Page 14
DD311
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Package Outline Dimension
TO-252 Unit: inch/mm
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 15
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
Product Ordering Information
Part Number
Package Type
TO252-1.27 (Exposed Pad)
Number / Weight ( typ.) Tube / Tray Reel ( Box included )
DD311-TO252EX
80pcs / Tube 0.046kg 5%
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 16
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
DD311-TO252EX Package and Weight4 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 Per Carton Set ( 4 Boxes, 12,800 pcs ) Weight ( Kg ) 0.0465% 0.405% 1.245% 10.205%
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 17
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
DD311
DD311-TO252EX Package and Weight6 Boxes Set
TO252 - 1.27 ( Exposed Pad ) IC
TO252
80 pcs ICs per Tube
Tube
53cm
Box
40 Tubes per Box
17cm 10cm
61cm
Carton
35cm 34cm
6 Boxes per Carton
64cm
Weight
Item 1 2 3 4 Description 80 pcs DD311-TO252EX per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 6 Boxes, 19,200 pcs ) Weight ( Kg ) 0.0465% 0.405% 1.445% 14.885%
HIGH CONSTANT CURRENT LED DRIVER
Version:A.002
Page 18
SILICON TOUCH TECHNOLOGY INC.
9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626
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
Version:A.002
Page 19

▲Up To Search▲

Price & Availability of DD3111

	To Download DD3111 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .