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DD312 Version : A.001 Issue Date : 2007/07/18 File Name : SP-DD312-A.001.doc Total Pages : 20 HIGH CONSTANT CURRENT LED DRIVER with ERROR DETECTION 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 DD312 DD312 HIGH CONSTANT CURRENT LED DRIVER with ERROR DETECTION General Description DD312 is a high constant current driver designed for LED lighting application and power LEDs. It incorporates a constant current circuitry with current value set by an external resistor. The output enable terminal allows dimming control by system. The fast response of output current can adapt to high dimming resolution and high refresh rate applications. Built-in LED open detection, over temperature, and over current protection functions ensure the system reliability. Features Maximum output current: 1A (determined by the external resistor) Minimum output voltage: 1V (Iout = 1A) Maximum output voltage: 18V Output enable terminal: 1MHz (max.) Supply voltage range: 5V ~ 18V Over current protection Thermal shutdown Thermal alarm (SOP8 only) LED open detection (SOP8 only) Applications LED architectural or entertainment lighting LED general or specialty illumination LED backlighting applications Package Types TO-252 or SOP8 (with thermal pad) HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 1 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Block Diagram Pin Connection GND EN OUT RESERVED 1 2 3 4 8 VCC ALARM REXT REXT SOP8 7 6 5 Pin Description PIN No. TO252:3/SOP8:1 TO252:5/SOP8:2 TO252:2/SOP8:3 SOP8:4 TO252:1/SOP8:5,6 PIN NAME GND EN OUT RESERVED REXT*1 Ground terminal. Output current enable terminal. Sink constant current outputs (open-drain). Terminal for testing, user should leave this pin open. External resistor connected between REXT and GND for driver current value setting. Output open drain terminal: (connected to a pull-high resistor) `H' for normal conditions, `L' for LED open or chip overheated. Power supply terminal. FUNCTION SOP8:7 ALARM TO252:4/SOP8:8 VCC *1 Notice that both REXT pins (SOP8: pin5 and pin6) should be connected in PCB layout. Version:A.001 Page 2 HIGH CONSTANT CURRENT LED DRIVER Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Maximum Ratings (Ta=25C, Tj(max) = 125C) CHARACTERISTIC Supply Voltage Input Voltage Output Current Output Voltage Enable Voltage Output Enable Frequency GND Terminal Current Power Dissipation Thermal Resistance (Junction to Air) Operating Temperature Storage Temperature SYMBOL VDD VIN Iout Vout VEN FEN IGND Pd Rth(j-a) Top Tstg *1 RATING -0.3 ~ 18 UNIT V -0.3 ~ VDD+0.3 1.0 -0.3 ~ 18 V -0.3 ~ 18 1 1.01 3.27 ( TO-252 ) 1.67 ( SOP8 ) 30.6 ( TO-252 ) 60 ( SOP8 ) -40 ~ 85 -55 ~ 150 MHz A W C/W A C Recommended Operating Condition CHARACTERISTIC Supply Voltage SYMBOL VDD CONDITION Driver On Output Voltage Vout Driver Off Output Current Iout VIH Input Enable Voltage VIL Input Enable Frequency FEN Ven > 3.0V VDD = 5V ~ 18V -0.3 DC 1.0 1 MHz OUT *2 *3 MIN. 5.0 1.0 3.0 TYP. MAX. 18 UNIT V V 18 1.0 18 V A *1 *2 Base on JEDEC high conductivity test board (4-layer) simulation. Notice that the power dissipation is limited to its package and ambient temperature. *3 The driver output voltage including any overshoot stress has to be compliant with the maximum voltage (18V). HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 3 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Electrical Characteristics (Ta = 25C unless otherwise noted) CHARACTERISTIC Input Enable Voltage "H" Level SYMBOL VEN(IH) VDD = 5V ~ 18V Input Enable Voltage "L" Level VEN(IL) Vout = 18 V Ven = 0 V Vout = 1.0 V REXT = 10 REXT = 0.5 Vout = 0.8 V ~ 3 V -0.3 1.0 CONDITION MIN. 3.0 TYP. MAX. 18 V UNIT Output Leakage Current Output Current Skew (Chip-to-Chip) *1 IOL 1.0 uA IOL1 5 % Output Voltage Regulation % / Vout 0.1 1 %/V Supply Voltage Regulation % / VDD REXT = 0.5 2 Alarm threshold temperature Talm REXT = 0.5 K 110 C Shutdown threshold temperature Tstd 180 C IDD1 VDD = 5 V REXT = 0.5 VDD = 12 V REXT = 0.5 VDD = 18 V REXT = 0.5 1.2 Supply Current *2 IDD2 2.0 mA IDD3 2.8 *1 *2 Chip-to-Chip skew is defined as the range into which any output current of any IC falls. IO excluded. Version:A.001 Page 4 HIGH CONSTANT CURRENT LED DRIVER Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 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 VIH = VDD VIL = GND tpHL REXT = 0.5 VL = 5.0 V RL = 8 Output Current Fall Time tof CL = 13 pF 140 150 ns 270 MIN. TYP. 166 MAX. UNIT tor Transient Characteristics VEN HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 5 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Constant-Current Output Constant-current value of each output channel is set by an external resistor connected between the REXT pin and GND. Varying the resistor value can adjust the current up to 1A. Notice that the output current is a little increasing or decreasing until the device temperature and ambient temperature are balance. The maximum power dissipation of the determined external resistor should be large enough than the actual power consumption: 0.5(V ) x Iout ( A) need to be considered. Approximate output current value can be calculated by following equation: Output Current as a Function of REXT value 1100 1000 900 800 700 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 8 9 10 11 Vout = 1.0 V Iout ( mA ) REXT( ) Output Current as a Function of Output Voltage 1.2 1.0 Iout (A) 0.8 0.6 0.4 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 Vout (Volt) HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 6 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Alarm Function (SOP8 Only) It can detect the operating status by connecting a pull-high resistor to the open-drain ALARM pin. The ALARM pin is kept `H' for normal conditions, and shifted to `L' if there is any failure like LED open, overheating or both occurrence. User can determine the different status from the truth table below: ALARM H HL HL EN don't care H L Status Normal Operation LED Open or Thermal issue Thermal Alarm or Shutdown Thermal Alarm and Shutdown During operation, when the junction temperature of the IC will reach about 110, the ALARM pin will shift to low level and produce a warning signal. Suggested cooling measures is to start the fan, lower the output currents and etc. If no cooling measures were activated, the junction temperature might continue to rise. Once it reaches approximately above 180, it will cause the driver to shutdown all the outputs. Basically, the IC will cool down and return to the safe operating temperature which is approximately below 110. The ALARM pin will reset to high level, disable the warning, and restart all the outputs at the same time. Operation in the thermal situation for a long time may cause chip damage permanently. HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 7 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 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: 4.0 Power Dissipation Pd(W) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 TO-252 Tj(max)=125 C Rth(TO-252)=30.6 C/Watt Rth(SOP8)=60 C/Watt SOP8 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 determined by the following equation: HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 8 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Typical Application HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 9 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Typical Application HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 10 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Typical Application HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 11 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Package Outline Dimension TO-252 Unit: inch/mm DIMENSIONS IN INCH SYMBOLS A A1 A2 b b2 c c1 D D1 E E1 e H L L1 L2 MIN. 0.086 0.000 0.040 MAX. 0.094 0.005 0.050 DIMENSIONS IN MM MIN. 2.184 0.000 1.016 MAX. 2.388 0.127 1.270 0.020 TYP 0.205 0.018 0.018 0.210 0.180 0.250 0.150 0.050 BSC 0.370 0.055 0.410 0.070 0.215 0.023 0.023 0.220 0.265 - 0.508 TYP 5.207 0.457 0.457 5.334 4.572 6.350 3.810 1.270 BSC 9.398 1.397 10.414 1.778 5.461 0.584 0.584 5.588 6.731 0.105 REF 0.06 0 0.08 4 2.667 REF 1.524 0 2.032 4 HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 12 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Package Outline Dimension SOP8 (exposed pad) Unit: inch HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 13 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 Product Ordering Information Part Number Package Type Number / Weight ( typ.) Tube / Tray Reel ( Box included ) DD312-SOP SOP8-150-1.27 TO252-1.27 (Exposed Pad) 100pcs / Tube 0.018kg 5% 80pcs / Tube 0.045kg 5% DD312-TO252EX HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 14 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 DD312-SOP Package and Weight4 Boxes Set SOP8 - 150 - 1.27 IC SOP 100 pcs ICs per Tube Tube 53cm Box 100 Tubes per Box 17cm 10cm 61cm 4 Boxes per Carton Carton 35cm 24cm 64cm Weight Item 1 2 3 4 Description 100 pcs DD312-SOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 4 Boxes, 40,000 pcs ) Weight ( Kg ) 0.0185% 0.405% 1.245% 10.045% HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 15 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 DD312-SOP Package and Weight6 Boxes Set SOP8 - 150 - 1.27 IC SOP 100 pcs ICs per Tube Tube 53cm Box 100 Tubes per Box 17cm 10cm 61cm Carton 35cm 34cm 6 Boxes per Carton 64cm Weight Item 1 2 3 4 Description 100 pcs DD312-SOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 6 Boxes, 60,000 pcs ) Weight ( Kg ) 0.0185% 0.405% 1.445% 14.645% HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 16 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 DD312-TO252EX Package and Weight4 Boxes Set TO252 - 1.27 ( Exposed Pad ) IC TO252 80 pcs ICs per Tube Tube 53cm Box 17cm 10cm 40 Tubes per Box 61cm 4 Boxes per Carton Carton 35cm 24cm 64cm Weight Item 1 2 3 4 Description 80 pcs DD312-TO252EX per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 4 Boxes, 12,800 pcs ) Weight ( Kg ) 0.0455% 0.405% 1.245% 10.045% HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 17 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 DD312-TO252EX Package and Weight6 Boxes Set TO252 - 1.27 ( Exposed Pad ) IC TO252 80 pcs ICs per Tube Tube 53cm Box 17cm 10cm 40 Tubes per Box 61cm 6 Boxes per Carton Carton 35cm 34cm 64cm Weight Item 1 2 3 4 Description 80 pcs DD312-TO252EX per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 6 Boxes, 19,200 pcs ) Weight ( Kg ) 0.0455% 0.405% 1.445% 14.645% HIGH CONSTANT CURRENT LED DRIVER Version:A.001 Page 18 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C. Tel886-3-5645656 Fax886-3-5645626 DD312 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.001 Page 19 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. |
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