DD233 Version Issue Date File Name Total Pages : A.010 : 2004/6/4 : SP-DD233-A.010.doc : 10 4-CHANNEL CONSTANT CURRENT LED DRIVERS 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 DD233 SILICON TOUCH TECHNOLOGY INC. DD233 4-CHANNEL CONSTANT CURRENT LED DRIVERS DESCRIPTION The DD233 is a 4-channel constant current LED driver. It’s designed to operate as a constant-current sink to drive the LEDs with an external resistance in low power environment. Because the DD233 directly determines output current by each channel in low Bit-to-Bit skew, it is ideal for driving LED whose light intensity is proportional to the current passing through them, not the voltage across their terminals. The ENABLE provides the low power stand by function for mobile applications. This configuration eliminates the need of external capacitors and inductances. With an input voltage range of 2.7V to 6V, so the device can work in general battery system. The value of constant current can be varied using an external resistor (Iout = 5 ~30mA). GENERAL FEATURES ˙Constant Current Output, 5~30mA. ˙Supply Voltage VDD is 2.7V to 6V. ˙Bit-to-Bit : ± 3.0% (Max) @ IOUT = 5 ~ 30mA. ˙Only Need One External Resistor, No Other External Parts. ˙8-Pin SOP8 or MSOP8 Package. APPLICATIONS ˙Digital Cameras ˙Portable MP3 Players ˙White LED Display Backlighting ˙Cellular Telephones ˙Handheld Computers ˙Pagers ˙Personal Digital Assistant ˙E-Books and Sub Notebooks 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 1 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. Pin Description PIN NAME VDD Rext GND ENABLE Out0 to Out3 OUT3 VDD OUT2 ENABLE OUT1 VSS OUT0 REXT DESCRIPTION Power supply terminal Input terminal of an external resistor Ground terminal Output enable terminal Output terminal Maximum Ratings (Ta = 25°°C, Tj(max) = 150°°C) CHARACTERISTIC Supply Voltage Output Current Output Voltage GND Terminal Current SYMBOL RATING UNIT VDD IOUT VOUT IGND V mA V mA Power Dissipation PD -0.5~7 30 ~17 120 0.44 Operating Temperature Top -20 ~ 85 °C Storage Temperature Tstg -55 ~ 150 °C W Recommended Operating Condition CHARACTERISTIC Supply Voltage Output Voltage Output Current Operating temperature SYMBOL VDD VOUT IO TOPR CONDITION Outn 4-CHANNEL CONSTANT CURRENT LED DRIVERS MIN. 2.7 0.2 5 -20 Version: A.010 TYP. 3.3 0.6 MAX. 6 5.0 30 85 Page UNIT V V mA °C 2 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. Electrical Characteristics CHARACTERISTIC (Typ:VDD = 3.3 V, Ta = 25°°C unless otherwise noted) SYMBOL MIN. TYP. MAX. UNIT ±1.5 ±3 % ±1.5 ±3 VOUT = 1 V IOL1 REXT = 12kΩ Output Current (Bit-Bit) VOUT = 0.5 IOL2 Output Current (Chip-Chip) CONDITION REXT = 60kΩ % IOL3 VOUT = 1.0V, REXT = 12kΩ 26.3 29.2 32.1 mA IOL4 VOUT = 0.5V, REXT = 60kΩ 4.8 5.31 5.8 mA Detailed Description 1) Constant Current Output Value Setting The output current is determined by the resistance connected between REXT pin and GND. The approximate relation between the resistance value and the base current value is shown in Fig1, the approximate equation presented in (Eq.1). Iout-Rext 35.00 30.00 Iout0 (mA) 25.00 20.00 15.00 10.00 5.00 0.00 0 10 20 30 40 50 60 70 80 Rext (kΩ) Fig 1 Iout ≅ 350.4/Rext (Eq.1) 2) Constant Current Output Value and Output Voltage In order to obtain a good constant current output, a suitable output voltage is necessary. Users can get related information about the minimum output voltage from Fig 2. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 3 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. 35.00 30.00 Iout0 (mA) 25.00 20.00 15.00 10.00 5.00 0.00 0 1 2 3 4 5 6 Vout (V) Fig 2 3) Power Dissipation The recommended power dissipation versus temperature is depicted as follows: SOP8 Power Dissipation-Temperature 600 Power Dissipation ( mW ) 550 500 450 400 350 300 250 200 150 100 50 0 0 25 50 75 100 125 Ambient Temperature ( ℃ ) 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 4 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. TYPICAL APPLICATION VDD 8 VDD OUT31 7 ENABLE ENABLE OUT22 5 REXT OUT13 OUT04 VSS 6 Rext Fig 3 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 5 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. DIE CONFIGURATION (UNIT: μM) Die Size: 984.3X643.8 Die Thickness: 300 Pad Size: 80X80 Pin NO. PAD Name 1 Out0 2 Out1 3 Out2 4 Out2 5 Rext 6 GND 7 EN 8 VDD 4-CHANNEL CONSTANT CURRENT LED DRIVERS Center Coordinate (X,Y) 80.5 564.1 202.1 564.1 323.7 564.1 445.3 564.1 581.3 391.85 586.5 224.9 724.1 70.8 913.9 419.25 Version: A.010 Page 6 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. Package Specification (SOP8) ( 8-pin SOP ) E H h x 45° D A C A1 B θ e L Seating Plane 0 5 0.0 Dimension in mm Symbol MIN. MAX. 0.2 mm 0.4 Dimension in inch MIN. A 1.35 1.75 0.0532 0.0688 0.10 0.25 0.0040 0.0098 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.0075 0.0098 1.27BSC inch NOTE MAX. A1 e 10 0.050BSC D 4.80 5.00 0.189 0.197 H 5.80 6.20 0.2284 0.2440 0.1574 E 3.80 4.00 0.1497 L 0.40 1.27 0.016 0.050 h 0.25 0.50 0.0099 0.0196 θ 0° 8° 0° 8° 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 7 點晶科技股份有限公司 DD233 SILICON TOUCH TECHNOLOGY INC. Package Specification (MSOP8) (8-pin MSOP ) E1 E C θ L D 12°(4X) A2 A A1 y b e Dimensions in Millimeter Dimensions in Inches SYMBOL MIN NOM MAX MIN NOM MAX A A1 A2 b C D E E1 e L Y 0.81 0.00 0.76 0.15 0.13 2.90 4.80 2.90 － 0.92 － 0.032 0.000 0.030 0.006 0.005 0.114 0.189 0.114 － 0.036 － 0.66 0.10 0.016 － 0.034 0.008 0.006 0.118 0.193 0.118 0.026 0.021 － 0.042 0.004 0.038 0.012 0.009 0.122 0.197 0.122 － 0.40 － 0.86 0.20 0.15 3.00 4.90 3.00 0.65 0.53 － 1.07 0.10 0.97 0.30 0.23 3.10 5.00 3.10 － θ 0° － 6° 0° － 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 0.026 0.004 6° Page 8 點晶科技股份有限公司 DD233 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. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 Page 9