DM115

DM115 ETC1

Document overview

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Technical content

DM114、DM115 Version : A.002 Issue Date : 2005/03/18 File Name : sp-DM1145-A.002 Total Pages : 17 8-Bit CONSTANT CURRENT LED DRIVERS with 3.3v ~ 5v supply voltage 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

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 1 Preliminary DM114、DM115 8-Bit CONSTANT CURRENT LED DRIVERS with 3.3v ~ 5v Supply Voltage General Description The DM114、DM115 is the constant current driver specifically designed for LED display applications. The value of constant current can be varied using an external resistor. The devices include an 8-bit shift register, latches, and constant current drivers on a single Silicon CMOS chip.

Features

z Maximum Output Voltage: 17V z Maximum Clock Frequency: 25MHz (Cascade Operation) z Power Supply Voltage: 3.3V to 5.0V z CMOS Compatible Input z Package: PDIP16, SOP16, SSOP16 z Package and Pin Layout: Pin layout and functionality are similar to those of the ST2221A. (Each characteristic value is different.) z Constant Current Matching: (Ta = 25°C、VDD = 5.0V) Chip-to-Chip: ± 10.0% DM114: Bit-to-Bit: ± 4.0% @ IOUT = 30 ~ 90mA ± 6.0% @ IOUT = 20 ~ 30mA DM115: Bit-to-Bit: ± 4.0% @ IOUT = 20 ~ 60mA ± 6.0% @ IOUT = 5 ~ 20mA

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 2 Preliminary Pin Connection (Top view) Block Diagram GND SERIAL-IN SERIAL-OUT CLOCK OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 R-EXT VDD ENABLE LATCH CK CK D D Q Q D ST Q CLOCK CK D Q I-REG. SERIAL-IN LATCH ENABLE R-EXT SERIAL-OUT OUT7 OUT1 OUT0 D D ST ST Q Q Delay Unit Delay Unit Delay Unit

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 3 Preliminary Timing Diagram (Note) Latches are level sensitive (not edge triggered). LATCH-terminal = H level, latches become transparent; LATCH-terminal = L level, latches hold data. ENABLE-terminal = H level, all outputs (OUT0~7) are off. An external resistor is connected between R-EXT and GND for setting up the value of constant current. SERIAL-OUT changes state on the rising edges of clock. Pin Description PIN No. PIN NAME FUNCTION GND GND terminal SERIAL-IN Input terminal of a data shift register CLOCK Input terminal of a clock for shift register LATCH Input terminal for data strobe 5~12 OUT0~7 Output terminals ENABLE Input terminal for output enable (active low) SERIAL-OUT Output terminal of a data shift register R-EXT Input terminal of an external resistor VDD 3.3/5V Supply voltage terminal OUT7 SERIAL-OUT OUT2 OUT1 OUT0 LATCH 3.3/5V 3.3/5V SERIAL IN CLOCK 3.3/5V Off Off On Off On Off 3.3/5V 3.3/5V ENABLE

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 4 Preliminary Equivalent Circuit of Inputs and Outputs 1. ENABLE terminal 2. LATCH terminal 3. CLOCK, SERIAL-IN terminal 4. SERIAL-OUT terminal INPUT VDD GND RIN(up) INPUT VDD GND RIN(down) INPUT VDD GND SERIAL_OUT VDD GND

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 5 Preliminary Maximum Ratings (Ta = 25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage VDD 0 ~ 7.0 V Input Voltage VIN -0.4 ~ VDD+0.4 V 90 (DM114) Output Current IOUT 60 (DM115) mA Output Voltage VOUT -0.3 ~ 17 V Clock Frequency fCLK MHz 750 GND Terminal Current IGND 500 mA 1.64 ( PDIP-16 : Ta=25°C) 1.08 ( SOP-16 : Ta=25°C) Power Dissipation PD 0.8 ( SSOP-16 : Ta=25°C) W 76 ( PDIP-16 ) 115 ( SOP-16 ) Thermal Resistance Rth(j-a) 155 ( SSOP-16 ) °C/W Storage Temperature Tstg -55 ~ 150 Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT Supply Voltage VDD 3.0 5.5 V Output Voltage VOUT V Operating temperature TOPR -40 IO OUTn IOH SERIAL-OUT 1.0 Output Current IOL SERIAL-OUT -1.0 mA VIH 0.7VDD VDD+0.3 Input Voltage VIL -0.3 0.3VDD V LATCH Pulse Width tw LAT ns CLOCK Pulse Width tw CLK ns Set-up Time for DATA tsetup(D) ns Hold Time for DATA thold(D) ns Set-up Time for LATCH tsetup(L) VDD = 3.0 ~ 5.5 V ns Clock Frequency fCLK 2 chips cascade operation MHz Ta = 85°C(PDIP-16) 0.85 Ta = 85°C(SOP-16) 0.56 Power Dissipation PD Ta = 85°C(SSOP-16) 0.41 W

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 6 Preliminary Electrical Characteristics (VDD = 5.0 V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT Input Voltage “H” Level VIH 0.7VDD VDD Input Voltage “L” Level VIL GND 0.3VDD V Output Leakage Current IOH VOH = 17 V 1.0 uA VOL IOL = 1.0 mA, VDD=5V 0.4 VOH IOH = -1.0 mA, VDD=5V 4.6 VOL IOL = 1.0 mA, VDD=3.3V 0.4 Output Voltage ( S - OUT) VOH IOH = -1.0 mA, VDD=3.3V 2.7 V DM114 REXT = 390Ω Output Current (Bit-Bit) ΔIout DM115 VOUT = 1.2V (1 channel on) REXT = 780Ω ±1.5 DM114 REXT = 390Ω 36.0 40.0 44.0 Output Current (Chip-Chip) Iout DM115 VOUT = 1.2V (1 channel on) REXT = 780Ω 18.0 20.0 22.0 mA Output Voltage Regulation % / Vout Vdd = 3.3V ~ 5.0V 0.1 0.5 % / V Pull-Up Resistor RIN(up) 200 400 600 KΩ Pull-Down Resistor RIN(down) 100 200 300 KΩ REXT = OPEN, all outputs off 1.3 DM114 REXT = 200Ω, OUT0~7 = off 11.0 REXT = OPEN, all outputs off 5.0 Supply Current “OFF” Idd (off) VDD=5V DM115 REXT = 300Ω, OUT0~7 = off 11.0 DM114 REXT = 200Ω, OUT0~7 = on 11.0 Supply Current “ON” Idd (on) VDD=5V DM115 REXT = 300Ω, OUT0~7 = on 11.0 mA REXT = OPEN, all outputs off 1.1 DM114 REXT = 200Ω, OUT0~7 = off 10.7 REXT = OPEN, all outputs off 1.1 Supply Current “OFF” Idd (off) VDD=3.3V DM115 REXT = 300Ω, OUT0~7 = off 7.2 DM114 REXT = 200Ω, OUT0~7 = on 10.7 Supply Current “ON” Idd (on) VDD=3.3V DM115 REXT = 300Ω, OUT0~7 = on 7.2 mA

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 7 Preliminary Switching Characteristics (Ta = 25 °C unless otherwise noted) DM114 CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT ENABLE-OUTn Propagation Delay Time (“L” to “H”) CLK-SOUT tpLH ns ENABLE-OUTn 140 Propagation Delay Time (“H” to “L”) CLK-SOUT tpHL ns Output Current Rise Time tor 250 400 ns Output Current Fall Time tof VDD=5.0V VIH=VDD VIL=GND REXT=210Ω VL=5.0V RL=47Ω CL=15pF ns DM115 CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT ENABLE-OUTn Propagation Delay Time (“L” to “H”) CLK-SOUT tpLH ns ENABLE-OUTn 140 Propagation Delay Time (“H” to “L”) CLK-SOUT tpHL ns Output Current Rise Time tor ns Output Current Fall Time tof VDD=5.0V VIH=VDD VIL=GND REXT=630Ω VL=5.0V RL=150Ω CL=15pF ns Note: (Delay between outputs) The DM114、DM115 also incorporated the delay unit between outputs. The delay time is 4 ns(typ.), out7 has no delay, out5 has 4 ns delay, out 3 has 8 ns delay, and then out 1, out 0, out 2, out 4, out6. The delay is to prevent large current impulse.

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 8 Preliminary Test Circuit DC characteristic AC characteristic IDD IIL ,IIH VIL ,VIH I ref IOL SERIAL-OUT OUT7 OUT0 VDD GND R-EXT LATCH SERIAL-IN ENABLE CLOCK VIL ,VIH VL CL CL CL RL RL SERIAL-OUT OUT7 OUT0 VDD GND R-EXT LATCH SW- MATRIX SERIAL-IN ENABLE CLOCK

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 9 Preliminary Timing Diagram 1. CLOCK-SERIAL OUT, OUTn 2. CLOCK-LATCH 3. ENABLE-OUTn (Current) 50% 50% 50% 50% tpHL tpLH OUTn ENABLE 50% “L” level = DATA HOLD SERIAL-IN LATCH CLOCK tsetup(L) 50% tw(LAT) 50% thold tsetup 50% 50% 90% 50% 50% 10% 10% 50% 90% SERIAL-IN OUTn (current) CLOCK twCLK tf tr 90% 50% 10% 10% 50% 90% tof tpHL tpLH tor twCLK SERIAL-OUT 50% 50% tpLH tpHL

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 10 Preliminary Output Current vs. External Resistor DM114 DM115 DM114: Iout ≈ 1.3V / Rext * 12 DM115: Iout ≈ 1.3V / Rext * 12.5 Output Current Performance vs. Output Voltage DM114 DM115 Note: 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 the above graph. 100 200 300 400 500 600 700 800 900 Rext (Ohm) Iout (mA) 200 400 600 800 1000 1200 1400 1600 1800 Rext (Ohm) Iout (mA) Vout (V) Iout (mA) 100 Vout (V) Iout (mA)

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 11 Preliminary Note As the power dissipation of a semiconductor chip is limited its package and ambient temperature, this device requires a maximum output current be calculated for a given operating condition. The maximum allowable power consumption (Pd (max)) of this device is calculated as follows: Rth emperature (ambient t Ta (max) temperatur (junction (Tj (max)( Watt C C Watt Pd Based on the Pd (max), the maximum allowable current can be calculated as follows: Iout = ( Pd – VDD‧IDD) / ( # outputs‧Vo‧Duty ) Imax - Ta ( DM115 ) 100 120 140 160 Ta Imax (mA) Imax - Ta ( DM114 ) 100 100 120 140 160 Ta Imax (mA) Pd - Ta 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 100 120 140 160 Ta Pd (W) DIP SOP SSOP DIP SOP SSOP DIP SOP SSOP

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 12 Preliminary System Configuration Example [1] Output current (IOUT) Sink current is set by the external resistor as shown in figure (Iout vs. Rext). [2] LED supply voltage (VLED) setup VLED = VCE ( Tr Vsat ) + Vf ( LED forward voltage ) + VO ( IC supply voltage) To prevent too much power dissipated by the device due to higher VLED , an additional R can be used to reduce the Vout when the outputs consume current: R = (max) (max) (min) Bit I V V V O O f LED Note This device has only one ground pin shared by signal, output sink current, and power ground. It is advisable to pattern the ground layout with minimized inductance such that the switching noise induced by the input signals and the output sink current would not cause chip malfunction. To prevent the drivers’ outputs from damage by overshoot stress, it is also advisable not to turn off the drivers and scan transistors simultaneously. V D D S E R IA L -O U T R V L E D = 3 ~ 4 (V ) O U T 7 O U T 0 G N D R -E X T L A T C H C P U S E R IA L -IN E N A B L E S C A N C L O C K S E R IA L -O U T O U T 7 O U T 0 G N D R -E X T L A T C H S E R IA L -IN E N A B L E C L O C K Vo

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 13 Preliminary Package Outline PDIP16 Unit: mm 6.35±0.13 Weight : 1.11g(Typ.) 7.62 0~15° 9.02±0508 19.69MAX 0.4572 1.524 2.54 19.18±0.51 3.3±0.508 3.3±0.1 5.33MAX 0.38MIN 0.635±0.254

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 14 Preliminary Package Outline SOP16 1.5 1.75 0.25 0.25 1.27 1.27 0.56 0.51 4.0MAX 6.2MAX Unit: mm

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 15 Preliminary Package Outline SSOP16 Unit: mm 0.229 0.635 0.3Max 3.91 5.99 0.635 0.254 1.63MAX 1.5 0.15 4.9

DM114、DM115 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage Version:A.002 Page 16 Preliminary 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.