DD233

DD233 SITI | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 10

Technical content

Version : A.010 Issue Date : 2004/6/4 File Name : SP-DD233-A.010.doc Total Pages : 10 4-CHANNEL CONSTANT CURRENT LED DRIVERS 新竹市科學園區展業一路新竹市科學園區展業一路新竹市科學園區展業一路新竹市科學園區展業一路 9999 號號號號 7777 樓之樓之樓之樓之 1111 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

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 1 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 (I out = 5 ~30mA). GENERAL FEATURES ˙Constant Current Output, 5~30mA. ˙Supply V oltage 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

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 2 Pin Description PIN NAME DESCRIPTION VDD Power supply terminal Rext Input terminal of an external resistor GND Ground terminal ENABLE Output enable terminal Out0 to Out3 Output terminal Maximum Ratings (Ta = 25°°°°C, Tj(max) = 150°°°°C) CHARACTERISTIC SYMBOL RA TING UNIT Supply V oltage V DD -0.5~7 V Output Current I OUT 30 mA Output V oltage V OUT ~17 V GND Terminal Current I GND 120 mA Power Dissipation P D 0.44 W Operating Temperature T op -20 ~ 85 °C Storage Temperature T stg -55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT Supply V oltage VDD  2.7 3.3 6 V Output V oltage VOUT  0.2 0.6 5.0 V Output Current IO Outn 5  30 mA Operating temperature T OPR  -20  85 °C OUT2 OUT3 OUT1 ENABLE VDD VSS OUT0 REXT

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 3 Electrical Characteristics (Typ:VDD = 3.3 V, Ta = 25°°°°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT IOL1 VOUT = 1 V REXT = 12kΩ  ±1.5 ±3 % Output Current (Bit-Bit) IOL2 VOUT = 0.5 REXT = 60kΩ  ±1.5 ±3 IOL3 VOUT = 1.0V , REXT = 12k Ω 26.3 29.2 32.1 mA Output Current (Chip-Chip) IOL4 VOUT = 0.5V , REXT = 60k Ω 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 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 0 102 03 04 05 06 07 08 0 Rext (kΩ) Iout0 (mA) Fig 1 I out ≅ 350.4/Rext (Eq.1) 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.

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 4 SOP8 Power Dissipation-Temperature 100 150 200 250 300 350 400 450 500 550 600 02 5 5 0 7 5 100 125 Ambient Temperature ( ℃ ) Power Dissipation ( mW ) 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 0 1 23456 Vout (V) Iout0 (mA) Fig 2 3) Power Dissipation The recommended power dissipation versus temperature is depicted as follows:

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 5 TYPICAL APPLICATION VDD VSS OUT0 OUT2 ENABLE OUT1 Rext OUT3 REXT ENABLE VDD Fig 3

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 6 DIE CONFIGURATION (UNIT: μM) Die Size: 984.3X643.8 Die Thickness: 300 Pad Size: 80X80 Pin NO. PAD Name Center Coordinate (X,Y) 1 Out0 80.5 564.1 2 Out1 202.1 564.1 3 Out2 323.7 564.1 4 Out2 445.3 564.1 5 Rext 581.3 391.85 6 GND 586.5 224.9 7 EN 724.1 70.8 8 VDD 913.9 419.25

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 7 Dimension in mm Symbol Dimension in inch MIN. MAX. MIN. MAX. D E H A θ C L 0.0 0.2 0.4 inch 0 10 mm5 ( 8-pin SOP ) Seating Plane A 1.35 1.75 0.0532 0.0688 A 1 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 e 1.27BSC 0.050BSC D 4.80 5.00 0.189 0.197 H 5.80 6.20 0.2284 0.2440 E 3.80 4.00 0.1497 0.1574 L 0.40 1.27 0.016 0.050 h 0.25 0.50 0.0099 0.0196 θ 0 ° 8 ° 0 ° 8 ° NOTE B e h x 45°

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 8 Dimensions in Millimeter Dimensions in Inches SYMBOL MIN NOM MAX MIN NOM MAX A1 0.00 － 0.10 0.000 － 0.004 Y －－ 0.10 －－ 0.004 θ 0° － 6° 0° － 6° (8-pin MSOP ) D E1 E b e AA2 12°(4X) θ C L y

點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 4-CHANNEL CONSTANT CURRENT LED DRIVERS Version: A.010 P a g e 9 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.