DM137 Version : A.001 Issue Date : 2007/01/01 File Name : SP-DM137-A.001.doc Total Pages : 32 16-bit Constant Current LED Driver with Error Detection 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 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137 16-bit Constant Current LED Driver with Error Detection General Description DM137 is a constant-current sink driver specifically designed for LED display applications. The device incorporates shift registers, data latches, and constant current circuitry on the silicon CMOS chip. The maximum output current value of all 16 channels is adjustable by a single external resistor. Its built-in open/short detection and thermal alarm circuits help users detect LED failures and overheating. There are two methods to communicate the error messages to the system. One is through serial output data to indicate which channel has failure. The other is by means of dedicated Alarm pin. Features z Constant-current outputs: 5mA to 90mA adjustable by one external resistor z Maximum output voltage: 17V z Maximum clock frequency: 25MHz z Built-in LED open/short detection: real-time monitor or smart detection modes z Fast detecting response: 0.1us (min.) z Over temperature protection: Alarm (junction temperature > 110°C) Shutdown (junction temperature > 180°C) z Power supply voltage: 3.3V to 5.5V Applications z LED Variable Message Signs (VMS) System z Indoor/Outdoor LED Video Display 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 1 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Block Diagram 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 2 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Pin Connection SSOP28 HSOP28 1 2 3 4 5 6 7 VCC EN LAT CLK DAI OS OUT0 28 27 26 25 24 23 22 Thermal Pad GND 8 9 10 11 12 13 14 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 21 20 19 18 17 16 15 GND RESERVED REXT SDO ALARM DAO OUT15 GND OUT14 OUT13 OUT12 OUT11 OUT10 OUT9 OUT8 QFN32 OUT8 OUT7 OUT6 OUT5 OUT4 GND VCC EN GND GND GND RESERVED OUT10 GND OUT9 OUT11 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 3 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Pin Description PIN No. PIN NAME SSOP28/HSOP28: 1 QFN32: 5 VCC FUNCTION Supply voltage terminal. SSOP28/HSOP28: 2 QFN32: 6 EN Output enable terminal: ‘H’ for all outputs are turned off , ‘L’ for all outputs are active. SSOP28/HSOP28: 3 QFN32: 9 LAT Input terminal of data strobe. Data on shift register goes through at the rising edge of LAT (edge trigger). Otherwise, data is latched. SSOP28/HSOP28: 4 QFN32: 10 CLK Synchronous clock input terminal for serial data transfer. Data is sampled at the rising edge of CLK. SSOP28/HSOP28: 5 QFN32: 11 DAI Serial data input terminal. OS Input open/short detection selection: ‘H’ for LED short detection mode, ‘L’ for LED open detection mode, ‘Edge’*1 for smart detection mode. OUT0~15 Sink constant-current outputs (open-drain). SSOP28/HSOP28: 6 QFN32: 12 SSOP28/HSOP28: 7~22 QFN32: 13~28 SSOP28/HSOP28: 23 QFN32: 29 DAO Serial data output terminal. Output open drain terminal: (connected to a pull-high resistor) ‘H’ for normal conditions, ‘L’ for LED open/short or chip overheated. SSOP28/HSOP28: 24 QFN32: 30 ALARM SSOP28/HSOP28: 25 QFN32: 31 SDO Serial data output trigger mode selection: ‘H’ means data is shifted out on synchronization to falling edge of CKO, ‘L’ means data is shifted out on synchronization to rising edge of CKO. SSOP28/HSOP28: 26 QFN32: 32 REXT External resistors connected between REXT and GND for output current value setting. SSOP28/HSOP28: 27 RESERVED Terminal for testing, user should leave this pin open. QFN32: 3 SSOP28/HSOP28: 28 Thermal pad QFN32: 1, 2, 4, 7, 8 Thermal pad *1 GND Ground terminal. Rising edge or falling edge. See detailed description (page 14~16). 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 4 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Equivalent Circuit of Inputs and Outputs 1. CLK, DAI, LAT, SDO, EN, OS terminals 2. DAO terminals 3. ALARM terminal 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 5 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Maximum Ratings (Ta=25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage VCC -0.3 ~ 7.0 V Input Voltage VIN -0.3 ~ VCC+0.3 V Output Current IOUT 100 mA Output Voltage VOUT -0.3 ~ 17 V Input Clock Frequency FCKI 25 MHz GND Terminal Current IGND 1600 mA 1.1 ( SSOP28 : Ta=25°C) Power Dissipation (4 layer PCB) W 2.11 ( HSOP28 : Ta=25°C) PD 3.18 ( QFN32 : Ta=25°C) 113.3 (SSOP28 ) Thermal Resistance Rth(j-a) °C/W 59.1 (HSOP28 ) 39.3 ( QFN32 ) Operating Temperature Top -40 ~ 85 °C Storage Temperature Tstg -55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT Supply Voltage VCC ⎯ 3.3 5.0 5.5 V Output Voltage VOUT Driver On 1.0 ⎯ 0.5VCC Output Voltage VOUT Driver Off ⎯ ⎯ 17 Output Current *2 IO OUTn 5 ⎯ 90 IOH VOH = VCC – 0.2 V ⎯ ⎯ +1.6 IOL VOL = 0.2 V VIH Input Voltage *1 VIL VCC = 3.3 V ~ 5.5V ⎯ ⎯ -1.5 0.8VCC ⎯ VCC 0.0 ⎯ 0.2VCC Single Chip Operation Input Clock Frequency FCKI Cascade Operation (SDO=’H’, CL=13pF) ⎯ ⎯ 15 tw LAT 15 ⎯ ⎯ CLK Pulse Width tw CLK 15 ⎯ ⎯ EN Pulse Width tw EN 15 ⎯ ⎯ tw OS 15 ⎯ ⎯ Set-up Time for DAI tsetup(D) 10 ⎯ ⎯ Hold Time for DAI thold(D) 10 ⎯ ⎯ Set-up Time for LAT tsetup(L) 10 ⎯ ⎯ Hold Time for LAT thold(L) 10 ⎯ ⎯ Set-up Time for OS tsetup(O) 25 ⎯ ⎯ tdet 100 ⎯ ⎯ Open/Short Detection Response *1 *2 V MHz 25 LAT Pulse Width VCC = 5.0V mA 25 Cascade Operation (SDO=’L’, CL=13pF) OS Pulse Width V ns Notice that the power dissipation is limited to its package and ambient temperature. The driver output voltage including any overshoot stress has to be compliant with the maximum voltage (17V). 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 6 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Electrical Characteristics (VCC = 5.0 V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. Input Voltage “H” Level VIH CMOS logic level 0.8VCC ⎯ VCC Input Voltage “L” Level VIL CMOS logic level GND ⎯ 0.2VCC IIH VIH = VCC ⎯ ⎯ 1.0 IIL VIL = GND ⎯ ⎯ 1.0 IOL VOH = 17 V ⎯ ⎯ ±1.0 VOL IOL = 1.5 mA ⎯ ⎯ 0.2 VOH IOH= 1.6 mA VCC-0.2 ⎯ ⎯ ⎯ ⎯ ±3 % 23.5 25 26.5 mA Rrext = 2.2 KΩ VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5 Rrext = 2.2 KΩ ⎯ ±1 ±4 ⎯ 0.3 ⎯ ⎯ 0.5VCC ⎯ ⎯ 110 ⎯ ⎯ 180 ⎯ Input Leakage Current Output Leakage Current Output Voltage (S-OUT) Output Current Skew (Channel-to-Channel) IOL1 *1 IOL2 *2 Output Voltage Regulation % / VOUT Supply Voltage Regulation % / VCC LED Open Detection Threshold V(od) LED Short Detection Threshold V(sd) Thermal Alarm Threshold T(alm) Thermal Shutdown Threshold *3 uA uA V all outputs turn on %/V T(sht) V °C junction temperature Supply Current V VOUT = 1.0 V Rrext = 2.2 KΩ Output Current Skew (Chip-to-Chip) UNIT IDD(off) power on all pins are open unless VCC and GND ⎯ 3.0 ⎯ IDD(off) input signal is static Rrext = 2.9 KΩ all outputs turn off ⎯ 4.8 ⎯ IDD(on) input signal is static Rrext = 2.9 KΩ all outputs turn on ⎯ 6.5 ⎯ IDD(on) input signal is static Rrext = 560 Ω all outputs turn off ⎯ 12.5 ⎯ IDD(on) input signal is static Rrext = 560 Ω all outputs turn on ⎯ 14.7 ⎯ mA *1 Channel-to-channel skew is defined as the ratio between (any Iout – average Iout) and average Iout, where average Iout = (Imax + Imin) / 2. *2 Chip-to-Chip skew is defined as the range into which any output current of any IC falls. *3 IO excluded. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 7 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Switching Characteristics (VCC = 5.0V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION EN-to-OUT15 Propagation Delay (‘L’ to ‘H’) LAT-to-OUT15 tpLH CLK-to-DAO (SDO = ‘L’) CLK-to-DAO (SDO = ‘H’) EN-to-OUT15 Propagation Delay (‘H’ to ‘L’) tpHL CLK-to-DAO (SDO = ‘L’) MAX. ⎯ 18 ⎯ ⎯ 20 ⎯ ⎯ 22 ⎯ VIL = GND ⎯ 15 ⎯ ⎯ 22 ⎯ ⎯ 15 ⎯ ⎯ 20 ⎯ ⎯ 14 ⎯ ⎯ 4.0 ⎯ VL = 5.0 V *1 CLK-to-DAO (SDO = ‘H’) TYP. VIH = VCC Rrext = 2.9 KΩ LAT-to-OUT15 MIN. CL = 13 pF Output Current Rise Time tor Output Current Fall Time tof ⎯ 6.0 ⎯ Output Delay Time (OUT(n)-to-OUT(n+1)) tod ⎯ 2.0 ⎯ Ra = 470 Ω UNIT ns Switching Characteristics (VCC = 3.3V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION EN-to-OUT15 Propagation Delay (‘L’ to ‘H’) LAT-to-OUT15 CLK-to-DAO (SDO = ‘L’) tpLH CLK-to-DAO (SDO = ‘H’) EN-to-OUT15 Propagation Delay (‘H’ to ‘L’) LAT-to-OUT15 CLK-to-DAO (SDO = ‘L’) *1 MAX. ⎯ 35 ⎯ ⎯ 27 ⎯ ⎯ 20 ⎯ VIL = GND ⎯ 18 ⎯ ⎯ 24 ⎯ ⎯ 31 ⎯ ⎯ 18 ⎯ ⎯ 19 ⎯ ⎯ 43 ⎯ VL = 5.0 V *1 CLK-to-DAO (SDO = ‘H’) TYP. VIH = VCC Rrext = 2.9 KΩ tpHL MIN. CL = 13 pF Output Current Rise Time tor Output Current Fall Time tof ⎯ 9.0 ⎯ Output Delay Time (OUT(n)-to-OUT(n+1)) tod ⎯ 2.8 ⎯ Ra = 470 Ω UNIT ns CL means the probe capacitance of oscilloscope. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 8 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Timing Diagram 1. CLK-DAI, DAO 2. CLK-LAT 3. LAT-OUT15 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 9 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 4. EN-OUT15 5. OUTn+1-OUTn 6. OS-LAT, CLK (EN=’L’) 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 10 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Constant-Current Output Constant-current value of each output channel is set by an external resistor connected between the REXT pin and GND. The current scale ranging can be adjusted from 5mA to 90mA by varying the resistor value. The reference voltage of REXT terminal (Vrext) is approximately 0.6V. The output current value is calculated by the following equation: Iout(mA) 5 10 20 30 40 50 60 70 80 90 M 99.7 98.1 96.0 94.2 92.5 90.8 89.1 87.1 85.1 84.4 Output Current as a Function of Rrext value 100 90 80 Iout (mA) ~ Iout (mA) 70 Vrext (V) × M Rrext (KΩ) 60 50 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10 11 12 Rrext (KΩ) Output Current as a Function of Output Voltage 100 90 80 Iout (mA) 70 60 50 40 30 20 10 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 Vout (V) In order to obtain a good performance of constant-current output, a suitable output voltage is necessary. Users can get related information about the minimum output voltage above. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 11 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Serial Data Interface The serial-in data (DAI) will be clocked into 16 bit shift register synchronized on the rising edge of the clock (CLK). The data ‘1’ represents the corresponding current output ‘ON’, while the data ‘0’ stands for ‘OFF’. The data will be transferred into the 16 bit latch synchronized on the rising edge of the strobe signal (LAT); otherwise, the data will be latched. The latch pulse should be sent after the falling edge of the last clock within a frame data. The trigger timing of the serial-out data (DAO) can be selected by the SDO pin. When SDO is set to ‘H’, the data will be shifted out on synchronization to the falling edge of the clock (CLK). And when SDO is set to ‘L’, the data will be shifted out on synchronization to the rising edge of the clock. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 12 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Alarm Function It can detect the operating status by connecting a pull-high resistor to the open-drain ALARM pin. The ALARM pin is kept ‘H’ for normal conditions, and shifted to ‘L’ if there is any failure like LED open/short, overheating or both occurrence. User can determine the different status from the truth table below: ALARM EN OS Status H L don’t care Normal Operation HÆL L L LED Open or Thermal issue HÆL L H LED Short or Thermal issue HÆL H don’t care Thermal Alarm or Shutdown When the latch is at its rising edge, the ALARM pin will reset to high level and start to detect once again. It will send out the test result after the next clock pulse. The detection cycle of the alarm signal will continue until it reaches the rising edge of the latch pulse again. Please see the timing diagram below: For actual application, the controller could connect all the ALARM pins with one pull-high resistor to simplify circuit designs and feedback loops. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 13 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Thermal Alarm and Shutdown During operation, when the junction temperature of the IC will reach about 110℃, the ALARM pin will shift to low level and produce a warning signal. Suggested cooling measures is to start the fan, lower the output currents and etc. If no cooling measures were activated, the junction temperature might continue to rise. Once it reaches approximately above 180℃, it will cause the driver to shutdown all the outputs. Basically, the IC will cool down and return to the safe operating temperature which is approximately below 110℃. The ALARM pin will reset to high level, disable the warning, and restart all the outputs at the same time. Operation in the thermal situation for a long time may cause chip damage permanently. LED Open/Short Detection Test result of DM137’s open/short detection could be retrieved from ALARM pin or serial-out (DAO) data. Setting the OS pin to low level (L) will activate OPEN detection; which identifies a LED open failure when there is a current passing through the output but the voltage is below 0.3V. Setting the OS pin to high level (H) will activate SHORT detection; which identifies a LED short failure when there is a current passing through the output but the voltage is above 1/2 VCC. DM137 will execute LED open/short detection then save the result within the particular shift register with the following conditions: 1) the shift register corresponding the particular output channel saves an image data of ‘1’, 2) the output enable terminal is activated (EN=’L’), and 3) the rising edge of the latch pulse takes place. By using the error message sent by serial-out, the controller can identify the status of every LED driven by each channel. For the process of either 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 14 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 open or short detection, the image data of the particular channel is always sent as ‘1’ , however, if ‘0’ is retrieved, there must be a LED failure. If the input of image data is ‘0’ or the output enable terminal is inactive (EN=’H’), it will not execute any detection for the particular channel. The original image data will be retrieved by serial-out. With the above operating principle, the controller could continuously retrieve data from serial-out and compare it with the frame data which have been sent and kept in the memory one by one. Therefore, once any discrepancy occurs (‘1’Æ’0’), any fail LED of a particular channel can be clearly identified. Since the detection is now a continuous action, and is able to exist without shifting between image and detection modes, it does not interrupt the image data flow and the output display. This is known as “real-time monitor”. The above mentioned detection method is more suitable for LED Variable Message Signs(VMS) system. However, for large LED display applications, there could be an additional load to the system since the frame data that needs to be compared and retrieved is greater within the memory. Therefore, DM137 provides two alternative solutions for LED open/short detection: The first solution is to activate the output enable terminal (EN=’L’) and send image data of ‘1’ to all channels. Failures will be identified when any data of ‘0’ is retrieved from serial-out. By counting the number of clock pulse, failure channels can be pointed out accurately. With this solution the load and memory resource of the system can be greatly minimized. The second method, which is also known as DM137’s “smart” detection, is triggered by using any change of edge (including rising edge, falling edge, low-high-low, high-low-high) produced by OS pin. It is recommended placing the signal between strobe signal (LAT) and the first clock (CLK) of one frame data will activate the detection. LED’s open or short failure is determined by the final kept level of the OS pin. Turn on all output channels (EN=‘L’) simultaneously, DM137 will complete the following two actions automatically: 1) Resetting all image data stored within latch registers to’1’. This will save the system resources and the time of sending at least one frame containing all image data of ‘1’ mentioned before. 2) Lowering the maximum output current at the same time to about 1/10 of its original value until the next rising edge of the latch pulse. This is to prevent a glitch perceived when all outputs are turned on. Finally, counting again the clock to identify the locations of any channels with fail LED. The impression of “invisible failure detection” is achievable. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 15 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Timing Diagram for LED Open/Short Detection 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 16 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Threshold for Short Detection The default threshold voltage for LED short detection of DM137 is 1/2 VCC. One could change the default voltage by switching or setting a new voltage of VLED during short detection is going on. Please see the example below for reference: Note that the VSHORT should be satisfied with the following inequality: The new threshold voltage of short detection will be equivalent to: 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 17 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Outputs Delay Large in-rush currents will occur when the system activates all the outputs at once. To reduce this effect, DM137 is designed to have a constant unit of delay (around 2ns) between outputs. The delay for every output goes like this: there is no delay for OUT15 and OUT7, 1 unit of delay for OUT14 and OUT6, 2 units of delay for OUT13 and OUT5 and so on. Global Brightness Control DM137 has no built-in global brightness control feature. In order to obtain a lower resolution of global brightness control effect, two methods could be utilized. One is providing PWM signal synchronized on latch pulse to modulate the output enable terminal (EN pin). The other is to adjust the Rrext value or voltage drop across the external resistor. Please see the reference circuit below: 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 18 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Power Dissipation 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) The relationship between power dissipation and operating temperature can be refer to the figure below: Power Dissipation Pd(W) 4.0 3.5 Tj(max)=150°C QFN32 3.0 Rth(QFN32)=39.3°C/Watt 2.5 Rth(HSOP28)=59.1°C/Watt HSOP28 Rth(SSOP28)=113.3°C/Watt 2.0 1.5 SSOP28 1.0 0.5 0.0 0 20 40 60 80 100 120 140 160 Ambient Temperature Ta(°C) The power consumption of IC can be determined by the following equation and should be less than the maximum allowable power dissipation: 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 19 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Package Outline Dimension DM137-SSOP D h x 45 E E1 DETAIL A C ZD θ2 0.25 MM A C e B R1 R A1 GAUGE PLANE 0.1MM θ1 DETAIL A L θ SEATING PLANE NOTES: DIMENSION D DOES NOT INCLUDE MODE PROTRUSIONS OR GATE BURRS. MOLD PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED 0.006 INCH PER SIDE SYMBOL A A1 A2 B C e D E E1 L h ZD R1 R θ θ1 θ2 JEDEC DIMENSION IN MM DIMENSION IN INCH MIN. NOM. MAX. MIN. NOM. MAX. 1.35 1.63 1.75 0.053 0.064 0.069 0.1 0.15 0.25 0.004 0.006 0.01 1.5 0.059 0.2 0.3 0.008 0.012 0.18 0.25 0.007 0.01 0.635 BASIC 0.025 BASIC 9.80 9.91 10.01 0.386 0.39 0.394 5.79 5.99 6.20 0.228 0.236 0.244 3.81 3.91 3.99 0.150 0.154 0.157 0.41 0.635 1.27 0.016 0.025 0.05 0.25 0.5 0.01 0.02 0.838 REF 0.033 REF 0.2 0.33 0.008 0.013 0.2 0.008 0 8 0 8 0 0 5 10 15 5 10 15 MO - 137 (AF) 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 20 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Package Outline Dimension DM137-HSOP 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 21 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Package Outline Dimension DM137-QFN TOP VIEW BOTTOM VIEW 0.25 C D2 D 25 32 25 24 8 17 24 1 17 8 L E E2 e 1 32 0.25 C 9 16 16 9 e b 0.10 M C AB A 0.10 C A3 A1 SEATING PLANE SYMBOL A A1 A3 b D D2 E E2 e L y MIN. 0.70 0 0.18 1.25 1.25 0.30 DIMENSION (mm) NOM. 0.75 0.02 0.25 REF 0.23 5.00 BSC 2.70 5.00 BSC 2.70 0.50 BSC 0.40 0.10 yC MAX. 0.80 0.05 MIN. 27.6 0 0.30 7.09 3.25 49.21 3.25 49.21 0.50 11.81 DIMENSION (MIL) NOM. 29.5 0.79 9.84 REF 9.06 196.85 BSC 106.30 196.85 BSC 106.30 19.69 BSC 15.75 3.94 MAX. 31.5 1.97 11.81 127.95 127.95 19.69 Note: 1.DIMENSIONING AND TOLERANCING CONFORM TO ASME Y145.5M-1994. 2. REFER TO JEDEC STD. MO-220 WHHD-2 ISSUE A 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 22 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-SSOP Package and Weight（4 Boxes Set） SSOP28 - 150 - 0.65 IC SSOP 50 pcs ICs per Tube Tube 53cm Box 100 Tubes per Box 11cm 10cm 61cm 4 Boxes per Carton Carton 24cm 24cm 64cm Weight Item 1 2 3 4 Description 50 pcs DM137-SSOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 4 Boxes, 20,000 pcs ) 16-bit Constant Current LED Driver with Error Detection Weight ( Kg ) 0.016±5% 0.40±5% 1.24±5% 9.24±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 23 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-SSOP Package and Weight（6 Boxes Set） SSOP28 - 150 - 0.65 IC SSOP 50 pcs ICs per Tube Tube 53cm Box 100 Tubes per Box 11cm 10cm 61cm Carton 6 Boxes per Carton 24cm 34cm 64cm Weight Item 1 2 3 4 Description 50 pcs DM137-SSOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 6 Boxes, 30,000 pcs ) 16-bit Constant Current LED Driver with Error Detection Weight ( Kg ) 0.016±5% 0.40±5% 1.44±5% 13.44±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 24 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-SSOP Package and Weight SSOP28 - 150 - 0.65 IC SSOP 2,500 pcs ICs per Reel Reel 1 Reel per Box 35cm Box 5cm 35cm 5 Boxes per Carton 36cm Carton 29cm 37cm 38cm Weight Item 1 2 3 4 Description 2,500 pcs DM137-SSOP per Reel Net Weight of one Box Net Weight of one Carton Weight (Kg) 0.96±5% 0.24±5% 0.90±5% Per Carton Set ( 5 Boxes, 12,500 pcs ) 16-bit Constant Current LED Driver with Error Detection 6.9±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 25 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-HSOP Package and Weight（4 Boxes Set） HSOP28 - 300 - 1.25 IC HSOP 25 pcs ICs per Tube Tube 53cm 100 Tubes per Box Box 11cm 10cm 61cm 4 Boxes per Carton Carton 24cm 24cm 64cm Weight Item 1 2 3 4 Description 25 pcs DM137-HSOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 4 Boxes, 10,000 pcs ) 16-bit Constant Current LED Driver with Error Detection Weight ( Kg ) 0.03±5% 0.40±5% 1.24±5% 14.84±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 26 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-HSOP Package and Weight（6 Boxes Set） HSOP28 - 300 - 1.25 IC HSOP 25 pcs ICs per Tube Tube 53cm 100 Tubes per Box Box 11cm 10cm 61cm 6 Boxes per Carton Carton 24cm 34cm 64cm Weight Item 1 2 3 4 Description 25 pcs DM137-HSOP per Tube Net Weight of one Box Net Weight of one Carton Per Carton Set ( 6 Boxes, 15,000 pcs ) 16-bit Constant Current LED Driver with Error Detection Weight ( Kg ) 0.03±5% 0.40±5% 1.44±5% 21.84±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 27 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-HSOP Package and Weight HSOP28 - 300 - 1.25 IC HSOP 1,000 pcs ICs per Reel Reel 1 Reel per Box 35cm Box 5cm 35cm 5 Boxes per Carton 36cm Carton 29cm 37cm 38cm Item 1 2 3 4 Weight Description 1,000 pcs DM137-HSOP per Reel Net Weight of one Box Net Weight of one Carton Weight (Kg) 1.48±5% 0.24±5% 0.90±5% Per Carton Set ( 5 Boxes, 5,000 pcs ) 16-bit Constant Current LED Driver with Error Detection 9.5±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 28 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 DM137-QFN Package and Weight QFN32 - 5 × 5 IC QFN 2,500 pcs ICs per Reel Reel 1 Reel per Box 35cm Box 5cm 35cm 5 Boxes per Carton 36cm Carton 29cm 37cm 38cm Item 1 2 3 4 Weight Description 2,500 pcs DM137-QFN per Reel Net Weight of one Box Net Weight of one Carton Per Carton Set ( 5 Boxes, 12,500 pcs ) 16-bit Constant Current LED Driver with Error Detection Weight (Kg) 0.76±5% 0.24±5% 0.90±5% 5.90±5% Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 29 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 Product Ordering Information Number / Weight ( typ.) Part Number Package Type Tube / Tray Reel ( Box included ) DM137-SSOP SSOP28-150-0.65 50pcs / Tube 0.016kg ± 5% 2,500pcs / Reel 0.96kg ± 5% DM137-HSOP HSOP28-300-1.25 25pcs / Tube 0.03kg ± 5% 1,000pcs / Reel 1.48kg ± 5% DM137-QFN QFN32-5 × 5 － 2,500pcs / Reel 0.76kg ± 5% 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 30 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM137 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. 16-bit Constant Current LED Driver with Error Detection Version:A.001 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 31