DD331 Version : Issue Date : File Name : Total Pages A.002 2008/12/19 SP-DD331-A.002.doc : 11 4-Channel Flexible LED Pre-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. Fax：886-3-5645626 Tel：886-3-5645656 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. DD331 4-Channel Flexible LED Pre-Driver General Description DD331 is a 4-channel LED pre-driver. It could provide constant-current to drive LED with four N-type MOSFETs and external resistors. The four output enable terminals are designed to drive LED with PWM functions. The maximum voltage and current in LED string are determined by specification of N-type MOSFET. Features ◆ Four independent LED output channels enable terminals, and current adjustment. ◆ Flexible in system design: Maximum constant current output (ILED), maximum sinking output voltage (VLED), and minimum output voltage are determined by the characteristic of N-type MOSFET ◆ Fast dimming frequency (determined by gate capacitance of MOSFET) ◆ Supply voltage range: 5V ~ 18V Applications z z z LED architectural or entertainment lighting LED general or specialty illumination LED backlighting applications Package Types SOP16, SSOP16 High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 1 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Block Diagram ENR ENG ENB ENW Constant Current Pre-Driver(R) GATER REXTR Constant Current Pre-Driver(G) GATEG REXTG Constant Current Pre-Driver(B) GATEB REXTB Constant Current Pre-Driver(W) GATEW REXTW VCC Voltage Regulator Bandgap Reference Pin Connection SOP16 / SSOP16 (Top View) GND 1 16 VCC ENR 2 15 GATER ENG 3 ENB 4 ENW 5 REXTW 6 11 GATEB GATEW 7 10 REXTB GND 8 9 SOP16 or SSOP16 High CONSTANT CURRENT LED DRIVERS 14 REXTR 13 GATEG 12 REXTG VCC Version:A.002 Page 2 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Pin Description SOP16 / TSSOP16 pin number PIN NAME FUNCTION GND VCC ENR ENG ENB ENW GATER GATEG GATEB GATEW REXTR REXTG REXTB REXTW Ground terminal Power supply terminal Output current enable terminals External N-type MOSFET gate connection terminals External resistors connected between REXT and GND for driver current value setting. 1,8 9,16 2 3 4 5 15 13 11 7 14 12 10 6 Maximum Ratings (Ta=25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL RATING Supply Voltage VCC -0.3 ~ 18.0 Input Voltage VIN -0.3 ~ VCC+0.3 Enable Voltage *1 VEN GND Terminal Current IGND Power Dissipation Pd Thermal Resistance (Junction to Air) Rth(j-a)*2 0.5 1.7 ( SOP16 ) 1.5 ( SSOP16 ) 72.1 ( SOP16 ) 82 ( SSOP16 ) Top -40 ~ 85 Storage Temperature Tstg -55 ~ 150 *2 V -0.3 ~ 18.0 Operating Temperature *1 UNIT A W °C/W °C VEN could not higher than VCC. Base on JEDEC high conductivity test board (4-layer) simulation. High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 3 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT VCC ⎯ 5 ⎯ 18 V 3.5 ⎯ VCC Supply Voltage VIH Input Enable Voltage VCC = 5V ~ 18V VIL V -0.3 ⎯ 1 Electrical Characteristics (Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL Input Enable Voltage “H” Level VEN(IH) Input Enable Voltage “L” Level VEN(IL) Vrext Skew (Channel-to-Channel) IOL1 Vrext Skew (Chip-to-Chip) IOL2 Supply Voltage Regulation % / VCC CONDITION VCC = 5 V ~ 18 V VCC = 18V Rext = 100Ω External N-mos : *1 VN0606 MIN. TYP. MAX. UNIT 3.5 ⎯ VCC -0.3 ⎯ 1 ⎯ ⎯ ±3 ⎯ ⎯ ±6 ⎯ 0.1 ⎯ ⎯ ⎯ 4.0 mA MIN. TYP. MAX. UNIT 1 ⎯ ⎯ ms V % Vout = 18V VCC = 5V ~ 18V VCC = 18V Rext = 100Ω IDD1 Supply Current External N-mos : VN0606 Vout = 18V AC Characteristics (VCC = 5~18V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION ENR,ENG,ENB,ENW Pulse Width twEN External N-mos : Rext = 100Ω VN0606 *1 The external N-mos VN0606 is just for reference, users can choose other kind external N-mos for their application. High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 4 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Switching Characteristics (VCC = 18V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION ENR-to-GATER ENG-to-GATEG (‘L to ‘H’) ENR-to-GATEB Rrext =5 Ω ENW-to-GATEW VL = 18 V ENR-to-GATER RL = 0.18 KΩ ENG-to-GATEG (‘H’ to ‘L’) ENR-to-GATEB TYP. MAX. ⎯ 20 ⎯ UNIT VIH = VCC Propagation Delay Propagation Delay MIN. VIL = GND tpLH ns CL = 13 pF tpHL ⎯ External N-mos : 125 ⎯ VN0606 ENW-to-GATEW Switching Characteristics (VCC = 5V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION ENR-to-GATER ENG-to-GATEG (‘L to ‘H’) ENR-to-GATEB Rrext = 5 Ω ENW-to-GATEW VL = 18 V ENR-to-GATER RL = 0.18 KΩ ENG-to-GATEG (‘H’ to ‘L’) ENR-to-GATEB VIL = GND tpLH ⎯ 25 ⎯ UNIT ns ⎯ External N-mos : 124 ⎯ VN0606 VL RL MAX. CL = 13 pF tpHL ENW-to-GATEW VL TYP. VIH = VCC Propagation Delay Propagation Delay MIN. VL RL RL VL RL VCC GATER GATEB GATEG GATEW REXTB REXTW CL CL REXTB REXTR REXTG REXTG REXTW REXTR CL CL Switching Characteristics Test Circuit High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 5 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Timing Diagram ENG,ENR,ENB,ENW to GATER,GATEG,GATEB,GATEW ENG ENR ENB ENW 50% 50% t wEN GATER GATEG GATEB GATEW 50% 50% t pLH t pHL Constant-Current Output The constant-current value of each output channels is set by a N-type MOSFET and an external resistor connected between the REXT(R, G, B, W) pin and GND individually. Varying the resistor value can adjust the current. Notice that the output current is a little increasing or decreasing until the device temperature and ambient temperature are balance. Approximate output current value can be calculated by following equation: 5 883.1 Iout M 10 967.2 20 990 40 10128 80 1044.6 160 1115.6 220 1478.8 Iout = 0.52 / Rext * M 100 90 80 Iout(mA) 70 60 50 40 30 20 10 0 0 50 100 150 200 Rext (Ω) High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 6 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Typical Application DD331 Application Notice Notice the Rext applies to lower than 5 Ω, the wire resistance(Rwire) will affect Iout a lot. For example, when Rext=5Ω Iout= 104mA, if Rwire=1Ω, than Iout will decrease 1.96%. Due to large current flow through rext, it needs high power resistor to apply to prevent element burn out issue. Dissipation Ratings PACKAGE SOP16 SSOP16 POWER DISSAPATION ( Tj_max=150 oC ) 1.7 W 1.5 W THERMAL RESISTANCE ( Rth(junction-to-air), Ta=25oC ) 72.1 oC/W 82 oC/W 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) High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 7 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Package Outline Dimension SOP16 SOP16-150mil mm SYMBOLS MIN. TYP. MAX. A 1.346 - 1.753 A1 0.051 - 0.250 b 0.330 - 0.510 c 0.190 - 0.250 D 9.800 - 10.008 E 3.800 - 4.000 e 1.270 BSC H 5.791 - 6.200 L 0.400 - 1.270 θ° 0 - 8 High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 8 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. Package Outline Dimension SSOP16 SSOP16 mm SYMBOLS MIN. TYP. MAX. A 1.346 - 1.753 A1 0.102 - 0.254 A2 1.245 - 1.499 b 0.203 - 0.305 c 0.178 - 0.254 D 4.801 4.902 5.004 E 5.791 5.994 6.198 e 0.635 BSC E1 3.810 3.912 3.988 L 0.406 - 1.270 θ° 0 - 8 High CONSTANT CURRENT LED DRIVERS Version:A.002 Page 9 點晶科技股份有限公司 DD331 SILICON TOUCH TECHNOLOGY INC. 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 DRIVERS Version:A.002 Page 10