DD331

DD331 SITI | Alldatasheet

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Technical content

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 DD331 Version : A.002 Issue Date : 2008/12/19 File Name : SP-DD331-A.002.doc Total Pages : 11 4-Channel Flexible LED Pre-Driver

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 1 DD331 4-Channel Flexible LED Pre-Driver General Description DD331 is a 4-channel LED pre-dr iver. It could provide cons tant-current to drive LED with four N-type MOSFETs and ex ternal resistors. The f our 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 enabl e 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 LED architectural or entertainment lighting z LED general or specialty illumination z LED backlighting applications Package Types SOP16, SSOP16

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 2 Block Diagram Constant Current Pre-Driver(W) Constant Current Pre-Driver(B) Constant Current Pre-Driver(G) Voltage Regulator Bandgap Reference GATER REXTR GATEG REXTG GATEB REXTB ENR ENG ENB Constant Current Pre-Driver(R) GATEW REXTW ENW VCC Pin Connection SOP16 / SSOP16 (Top View) SOP16 or SSOP16 GND GATER ENG GATEW GND ENR GATEG VCC REXTR REXTG GATEB REXTB VCC REXTW ENW ENB

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 3 Pin Description PIN NAME FUNCTION SOP16 / TSSOP16 pin number GND Ground terminal 1,8 VCC Power supply terminal 9,16 ENR ENG ENB ENW Output current enable terminals GATER GATEG GATEB GATEW External N-type MOSFET gate connection terminals REXTR REXTG REXTB REXTW External resistors connected between REXT and GND for driver current value setting. Maximum Ratings (Ta=25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage VCC -0.3 ~ 18.0 Input Voltage VIN -0.3 ~ VCC+0.3 Enable Voltage VEN *1 -0.3 ~ 18.0 V GND Terminal Current I GND 0.5 A Power Dissipation Pd 1.7 ( SOP16 ) 1.5 ( SSOP16 ) W Thermal Resistance (Junction to Air) Rth(j-a) *2 72.1 ( SOP16 ) 82 ( SSOP16 ) °C/W Operating Temperature Top -40 ~ 85 Storage Temperature Tstg -55 ~ 150 *1 VEN could not higher than VCC. *2 Base on JEDEC high conductivity test board (4-layer) simulation.

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 4 Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT Supply Voltage VCC ⎯ 5 ⎯ 18 V VIH 3.5 ⎯ VCC Input Enable Voltage VIL VCC = 5V ~ 18V -0.3 ⎯ 1 V Electrical Characteristics (Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT Input Enable Voltage “H” Level V EN(IH) 3.5 ⎯ VCC Input Enable Voltage “L” Level V EN(IL) VCC = 5 V ~ 18 V -0.3 ⎯ 1 V Vrext Skew (Channel-to-Channel) IOL1 ⎯ ⎯ ±3 Vrext Skew (Chip-to-Chip) IOL2 VCC = 18V Rext = 100Ω External N-mos : VN0606*1 Vout = 18V ⎯ ⎯ ±6 Supply Voltage Regulation % / VCC VCC = 5V ~ 18V ⎯ 0.1 ⎯ Supply Current IDD1 VCC = 18V Rext = 100Ω External N-mos : VN0606 Vout = 18V ⎯ ⎯ 4.0 mA AC Characteristics (VCC = 5~18V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT ENR,ENG,ENB,ENW Pulse Width twEN Rext = 100Ω External N-mos : VN0606 1 ⎯ ⎯ ms *1 The external N-mos VN0606 is just for reference, users can choose other kind external N-mos for their application.

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 5 Switching Characteristics (VCC = 18V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT ENR-to-GATER ENG-to-GATEG ENR-to-GATEB Propagation Delay (‘L to ‘H’) ENW-to-GATEW tpLH ⎯ 20 ⎯ ENR-to-GATER ENG-to-GATEG ENR-to-GATEB Propagation Delay (‘H’ to ‘L’) ENW-to-GATEW tpHL VIH = VCC VIL = GND Rrext =5 Ω VL = 18 V RL = 0.18 KΩ CL = 13 pF External N-mos : VN0606 ⎯ 125 ⎯ ns Switching Characteristics (VCC = 5V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT ENR-to-GATER ENG-to-GATEG ENR-to-GATEB Propagation Delay (‘L to ‘H’) ENW-to-GATEW tpLH ⎯ 25 ⎯ ENR-to-GATER ENG-to-GATEG ENR-to-GATEB Propagation Delay (‘H’ to ‘L’) ENW-to-GATEW tpHL VIH = VCC VIL = GND Rrext = 5 Ω VL = 18 V RL = 0.18 KΩ CL = 13 pF External N-mos : VN0606 ⎯ 124 ⎯ ns GATER REXTR VCC REXTG RL VL Switching Characteristics Test Circuit REXTG REXTB REXTW GATEG GATEB GATEW REXTB REXTW REXTR RL VL RL VL RL VL CLCL CLCL

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 6 Timing Diagram ENG,ENR,ENB,ENW to GATER,GATEG,GATEB,GATEW GATER GATEG GATEB GATEW ENG ENR ENB ENW 50% 50% tpLH 50% 50% tpHL twEN 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: Iout 5 10 20 40 80 160 220 Iout = 0.52 / Rext * M 100 0 50 100 150 200 Rext (Ω) Iout(mA)

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 7 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=5 Ω Iout= 104mA, if Rwire=1 Ω, than Iout will decrease 1.96%. Due to large current fl ow through rext, it needs high power resistor to apply to prevent element burn out issue. Dissipation Ratings PACKAGE POWER DISSAPATION ( Tj_max=150 oC ) THERMAL RESISTANCE ( Rth(junction-to-air), Ta=25oC ) SOP16 1.7 W 72.1 oC/W SSOP16 1.5 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: Tj(junction temperature)(max)( C) - Ta(ambient temperature)( C)Pd(max)(Watt) = Rth(junction- to- air thermal resistance)( C/Watt)

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 8 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

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 9 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

點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DD331 High CONSTANT CURRENT LED DRIVERS Version:A.002 P a g e 1 0 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 t he devices should not be used in medical instruments, surgical implants, aerospa ce machinery, nuclear power control systems, disaster/crime-prevention equi pment 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 fu ll responsibility and indemnify. Silicon Touch Technology, Inc. and its distribut ors 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.