DM13H-E Version Issue Date File Name Total Pages : A.004 : 2015/06/25 : SP-DM13H-E A.004.doc : 25 16-Channel Constant Current LED Driver with Error Detection 新竹市科學園區展業一路 9 號 4 樓之 3 SILICON TOUCH TECHNOLOGY INC. 9-4F-3, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel:886-3-5645656 Fax:886-3-5645626 DM13H-E DM13H-E 16-Channel Constant Current LED Driver With Error Detection General Description DM13H-E is a 16-channel 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 of each channel is set by a single external resistor. Its built-in LED open/short detection, output channels short to GND detection help users to detect LED failures, outputs short. The thermal alarm and shutdown functions provide the over-temperature protection. Features z 16-Channel Constant-current outputs: 3mA to 90mA adjustable by one external resistor z Maximum output voltage: 17V z Maximum cascade clock frequency: 25MHz z Built-in LED open/short detection: Real-time detection or Smart detection z Built-in Outputs short to GND detection: Real-time or Smart detection z Fast detecting response: 100ns (min.) z Over temperature protection: Alarm (junction temperature > 130°C) Shutdown (junction temperature > 170°C) z In-rush current control z Schmitt trigger input z Power supply voltage: 3.0V to 5.5V z Package pin assignment compatible to conventional LED drivers (DM134B/5B,DM13C) Applications z LED Variable Message Signs (VMS) System z Indoor/Outdoor LED Video Display Packages SSOP24, TSSOP24E, SOP24B, QFN24 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Block Diagram 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Pin Connection (Top View) SSOP24 / TSSOP24E / SOP24B/ QFN24 GND DAI CLK LAT OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC REXT DAO EN OUT15 OUT14 OUT13 OUT12 OUT11 OUT10 OUT9 OUT8 Pin Description PIN No. PIN NAME FUNCTION SSOP24/TSSOP24E/SOP24B: 1 QFN24: 22 GND Ground terminal. SSOP24/TSSOP24E/SOP24B: 2 QFN24: 23 DAI Serial data input terminal. SSOP24/TSSOP24E/SOP24B: 3 QFN24: 24 CLK Synchronous clock input terminal for serial data transfer. Data is sampled at the rising edge of CLK. SSOP24/TSSOP24E/SOP24B: 4 QFN24: 1 LAT Input terminal of data strobe. Data on shift register goes through at the rising edge (edge trigger). Otherwise, data is latched. SSOP24/TSSOP24E/SOP24B: 5~20 QFN24: 2~17 OUT0~15 Sink constant-current outputs (open-drain). SSOP24/TSSOP24E/SOP24B: 21 QFN24: 18 EN Output enable terminal: ‘H’ for all outputs are turned off , ‘L’ for all outputs are active. SSOP24/TSSOP24E/SOP24B: 22 QFN24: 19 DAO Serial data output terminal. SSOP24/TSSOP24E/SOP24B: 23 QFN24: 20 REXT External resistors connected between REXT and GND for output current value setting. SSOP24/TSSOP24E/SOP24B: 24 QFN24: 21 VCC Supply voltage terminal. 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Equivalent Circuit of Inputs and Outputs 1.CLK, DAI, LAT , EN terminals ( Schmitt Trigger Input ) 2. DAO terminals 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Maximum Ratings (Ta=25°C, Tj(max) = 150°C) SYMBOL RATING UNIT Supply Voltage CHARACTERISTIC VCC -0.3 ~ 7.0 V Input Voltage VIN -0.3 ~ VCC+0.3 V Output Current IOUT 90 mA Output Voltage VOUT -0.3 ~ 17 V Input Clock Frequency FCKI 30 MHz GND Terminal Current IGND 1500 mA Power Dissipation Thermal Resistance 1.5 (SSOP24) PD W 2.8 (TSSOP24) 85 (SSOP24) Rth(j-a) °C/W 45 (TSSOP24E) Operating Temperature Top -40 ~ 85 °C Storage Temperature Tstg -55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC Supply Voltage SYMBOL CONDITION MIN. TYP. MAX. UNIT VCC ⎯ 3.0 ⎯ 5.5 V ⎯ ⎯ 17 V *1 Output Voltage VOUT IO OUTn, VCC=5V 3 ⎯ 90 Output Current IOH VOH = VCC – 0.2 V ⎯ ⎯ +1.5 IOL VOL = 0.2 V ⎯ ⎯ -1.5 0.7VCC ⎯ VCC 0.0 ⎯ 0.3VCC ⎯ ⎯ 15 ⎯ ⎯ Input Voltage Input Clock Frequency VIH VIL FCKI Driver Off VCC = 3.3 V ~ 5V Single Chip Operation Cascade Operation 30 ⎯ LAT Pulse Width tw LAT CLK Pulse Width tw CLK 13 ⎯ ⎯ EN Pulse Width tw EN 50 ⎯ ⎯ 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 ⎯ ⎯ LAT Pulse Width tw LAT 15 ⎯ ⎯ CLK Pulse Width EN Pulse Width tw CLK tw EN 13 ⎯ ⎯ 50 ⎯ ⎯ VCC = 5.0V Set-up Time for DAI tsetup(D) 12 ⎯ ⎯ Hold Time for DAI Set-up Time for LAT thold(D) 8 ⎯ ⎯ tsetup(L) 8 ⎯ ⎯ Hold Time for LAT thold(L) 12 ⎯ ⎯ *1 VCC = 3.3V mA V MHz ns 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.004 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 DM13H-E 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 0.7VCC ⎯ VCC Input Voltage “L” Level VIL CMOS logic level GND ⎯ 0.3VCC Output Leakage Current IOL VOH = 17 V ⎯ ⎯ +1 VOL IOL = -1.5 mA ⎯ ⎯ 0.2 VOH IOH= 1.5 mA VCC-0.2 ⎯ ⎯ ⎯ ⎯ ±4 % ⎯ ⎯ ±6 % Output Voltage (S-OUT) Output Current Skew *1 (Channel-to-Channel) IOL1 Output Current Skew *2 (Chip-to-Chip) IOL2 VOUT = 1.0 V Rrext = 3.9 KΩ UNIT V uA V Output Voltage Regulation % / VOUT Rrext = 3.9 KΩ VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5 Supply Voltage Regulation % / VCC Rrext = 3.9 KΩ ⎯ ±1 ±4 Differential Linearity DNL Rrext = 3.9 KΩ ⎯ ±1.2 Output Voltage Short to GND, LED Open Detection Threshold V(od) output turns on ⎯ 0.1 ⎯ V SV = ”H” ⎯ 3/4VCC +0.25 ⎯ V SV = ”L” ⎯ 1/2VCC +0.25 ⎯ V ⎯ 130 ⎯ ⎯ 170 ⎯ ⎯ 170 ⎯ ⎯ LED Short Detection Threshold*3 (output turns on) V(sd) T(130) Thermal Threshold T(170) Thermal Shutdown Threshold T(sht) IDD(off) power on all pins are open unless VCC and GND ⎯ 1.2 IDD(off) Rrext = 3.9 KΩ all outputs turn off ⎯ 7 IDD(on) Rrext = 3.9 KΩ all outputs turn on ⎯ 7.6 IDD(off) Rrext = 820 Ω all outputs turn off ⎯ 27.5 IDD(on) Rrext = 820 Ω all outputs turn on ⎯ 30 Supply Current (Input signal is static) junction temperature %/V LSB ⎯ °C 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 LED short detection voltage level default value is 3/4*VCC+0.25 V , refer to Page 12 for level selection. 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Switching Characteristics (VCC = 5.0V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. 14 26 36 VIH = VCC 19 31 41 VIL = GND 15 19 23 19 31 41 19 32 41 16 20 24 4.5 10 18 4.5 10 18 EN -to-OUT0 Propagation Delay LAT -to-OUT0 (‘L to ‘H’) tpLH CLK-to-DAO EN -to-OUT0 Propagation Delay LAT -to-OUT0 (‘H’ to ‘L’) Rrext = 3.9 KΩ tpHL VL = 5.0 V CLK-to-DAO Output Current Rise Time tor RL = 0.18 KΩ CL = 13 pF UNIT ns Output Current Fall Time tof Output Delay Time (OUT(n)-to-OUT(n+1)) tod 0.5 3 5.5 Detection Response tdet 20 100 120 Switching Characteristics (VCC = 3.3V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. 16 36 46 VIH = VCC 21 37 47 VIL = GND 18 22 26 19 35 41 19 37 41 19 23 27 7.5 14 21 7.5 14 21 EN -to-OUT0 Propagation Delay LAT -to-OUT0 (‘L to ‘H’) tpLH CLK-to-DAO EN -to-OUT0 Propagation Delay LAT -to-OUT0 (‘H’ to ‘L’) Rrext = 3.9 KΩ tpHL VL = 5 V CLK-to-DAO Output Current Rise Time tor RL = 0.18 KΩ CL = 13 pF ns Output Current Fall Time tof Output Delay Time (OUT(n)-to-OUT(n+1)) tod 0.7 3 6.5 Detection Response tdet 20 100 120 16-bit Constant Current LED Driver with Error Detection Version:A.004 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. UNIT Page 7 DM13H-E Timing Diagram 1. CLK-DAI, DAO twDCK DCK 50% t setup(D) DAI twDCK 50% 50% 50% thold(D) 50% 50% DAO 50% 50% tpLH tpHL 2. CLK- LAT CLK 50% 50% t hold(L) t setup(L) LAT 50% 50% twLAT 3. LAT -OUT0 50% 50% LAT t or tof 90% 90% 50% OUT0 50% 10% 10% t pLH (current) t pHL 4. EN -OUT0 t wEN EN 50% 50% tof tor 90% 90% 50% 50% 10% OUT0 t pLH (current) 10% t pHL 5. OUTn+1-OUTn OUTn+1 (current) 50% tod OUTn (current) 50% 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Constant-Current Output Constant-current value of each output channel is set by an external resistor connected between the REXT pin and GND. Varying the resistor value can adjust the current scale ranging from 3mA to 90mA. The reference voltage of REXT terminal (Vrext) is approximately 1.23V. The output current value is calculated by the following equation: 90 80 Iout (mA) ~ IOUT(mA) 70 60 V rext (V) × 65 Rrext (KΩ) 50 40 30 20 10 0 1 2 3 4 5 6 Rext (K) 7 8 9 10 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 below. 100 90 80 IOUT(mA) 70 60 50 40 30 20 10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 VOUT(V) 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Serial Data Interface DM13H-E includes a flexible data transfer interface. The data can be transferred from DAI pin to the shift registers at the rising edge of CLK. After all data are clocked in, a rising edge of the LAT signal can transfer the serial data to the data latches (Edge trigger). The serial data format can be 16-bit or 10-bit wide, depending on the operating mode of the device. Operation Mode DM13H-E has two operating modes depending on the combination of CLK and LAT signals. The table below shows the available operating modes. For normal operation (SD mode), the data width of shift register is 16-bit, which is used to set 16 bits serial-in image data. The sequence of the combination of CLK and LAT explains in following pages is used to change the operation mode. If there are four triggering clock pulses (CLK) with high level latch ( LAT ), DM13H-E will change to command data input mode (CD mode) at falling edge of the latch pulse ( LAT ) then user can make ten triggering clock pulses to set 1-bit voltage level selection of short detection (default value after power-on is 1’b1). OPERATION MODE SHIFT REGISTER Serial-in Data Input Mode (SD mode) 16-bit Command Data Input Mode (CD mode) 10-bit 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E SD Mode Data Format MSB 15 14 13 12 11 OUT15 OUT14 OUT13 OUT12 OUT11 ‧‧‧ 4 3 2 1 LSB 0 OUT4 OUT3 OUT2 OUT1 OUT0 Shift-in first When DM13H-E operates at SD mode, 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 output data won’t be changed. The latch pulse should be sent after the falling edge of the last clock within a frame data. 0 1 2 3 13 14 15 0 CLK 2 0 1 high DAI DAO 1 low 0 previous data 1 Tsetup (L) high LAT low 0 EN 1 on OUT 0 off (current) on OUT 1 off (current) on OUT 2 off (current) . . . . . . on OUT12 off (current) on OUT13 off (current) on OUT14 off (current) on OUT15 off (current) 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E CD Mode Data Format Short detection voltage level selection DM13H-E provides 2 voltage levels in coordination with LED short detection on system. VCC voltage level is the default value while power-on. DAO will send an error signal = H if the output voltage is greater than a respectively predetermined threshold value. SV Short Voltage 0 1/2 * VCC + 0.25 V 1 3/4 * VCC + 0.25 V (default) 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Error Detection DM13H-E includes Real-time and Smart detection mode for LED open/short and driver outputs short to GND detection. It can be set as six types which are showing as following table. Detection Type Real time LED Open Detection Detection Operation CLK rising edge x1, with LAT =H Real time Output Short to GND Detection CLK rising edge x2, with LAT =H Real time LED Short Detection CLK rising edge x3, with LAT =H Smart LED Open Detection CLK rising edge x1, with LAT =H then LAT falling edge x2 with CLK=H Smart Output Short to GND Detection CLK rising edge x2, with LAT =H then LAT falling edge x2 with CLK=H Smart LED Short Detection CLK rising edge x3, with LAT =H then LAT falling edge x2 with CLK=H Selection of detection types is a collocation of CLK and LAT . After detection executed, the error report will be saved in the particular shift register and could be retrieved from serial-out(DAO) data. For Real-Time LED open/short detections, it’s necessary to set the image data of the particular output channel as ‘1’. The serial-out data is ‘0’ in the LED normal state, and the serial-out data will be ‘1’ while a LED failure has occurred. If the image data is written to “0” or the output terminal is inactive (EN =H), it will not execute any detection process for the corresponding channel. Therefore, the serial-data will remain as “0”. For Real-Time Output Short to GND detection type, set the image data of the particular output channel to ‘0’, outputs’ state will be identified from DAO as above. In output normal state, the serial-out data is ‘0’, but if the serial-out data is ‘1’ then a DM13H-E output voltage lower than 0.1V. If the image data of particular channel is ‘1’, no detection will be executed for the corresponding channel, and the serial-out data will be ’0’. Otherwise, If output enable terminal is active (EN =’L’), the serial-out data will be ’0’. DM13H-E specializes in fast detection response, 100ns minima. Moreover, it offers multi selections like Real-Time monitor and Smart detection. Accordingly, it is more flexible and well adapted to the system requirements. 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E a. Normal operation When DM13H-E operates at normal operation (Latch only) the DAO pin will send out the original serial-in data not the error message. SD mode 1 DAI J [2] J [1] J [0] 14 15 16 Don'care t L[15] L[14] 1 2 L[ 0 ] Don'care t M[15 ] M[14 ] 1 2 M[13] 0 Normal operation 16 3 high CLK low high LAT l ow 1 DAO I [1] I [2] J [14] J [15] L [15 ] L [14 ] L [13 ] 0 OUT0 (current ) on Fr ame Data I Fr ame Data J Frame Data L off b. LED Open/Short Detection(Real-time) Set one CLK rising edge with LAT =‘H’ to operate Open Real-Time detection. Each channel will be identified as a LED open failure when there is a current passing through the output but the voltage is below 0.1V. SD Mode DAI LED Open Real Time Detection Mode SD Mode 1 J [2] J [1] J [0] Don'care t L[15] L[14] 14 15 16 1 1 2 L[ 0 ] Don'care t M[15 ] M[14 ] M[13 ] 1 2 3 0 16 CLK High Low 1 LAT 0 tDET DAO OUT0 (current ) High I [2] I [1] I [0] E [15 ] E [14 ] L [15 ] L [14 ] L [13 ] Low On Fr ame Data I Frame Data L Fr ame Data J Off 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Set three CLK rising edges with LAT =‘H’ to operate Short Real-Time detection. A LED short failure will be identified when the output channel is on and the output voltage is higher VCC. LED Short Real Time Detection Mode SD Mode SD Mode 1 DAI J [2] J [1] Don'care t J [0] L [15] L[14] L[ 0 ] Don'care t M [15] M[14] M[13] 0 14 15 16 1 2 3 1 2 16 1 2 3 CLK High Low 1 LAT 0 tDET High DAO I [2] I [0] I [1] E [15 ] E [14 ] L [15 ] L[14] L[13] Low OUT0 (current ) On Frame Data I Frame Data L Frame Data J Off With the above operating principle, the controller could continuously retrieve LED status from serial-out(DAO) then compare with the last frame date one by one . Once there is any serial-out data at ’1’ be retrieved, it pinpoints the channel with failed LED. Since the process is ongoing and without shifting between image and detection mode, it does not interrupt the image data flow and the output display. This is known as “Real-Time Monitor”. c. LED Open/Short Detection (Smart Detection) DM13H-E also specially provides another ”smart” detection method. In Smart detection mode, DM13H-E will automatically turns on all output channels with Iout=50uA until the next rising edge of the CLK pulse. After the rising edge of CLK, the output current will return to original state. Notice that enable control (EN ) won’t affect smart detection result. Set one CLK rising edge with LAT =‘H’ then two LAT falling edges with CLK is ‘H’ to operate Open Smart detection. Each channel will be identified as a LED open failure when there is a current passing through the output but the voltage is below 0.1V. LED Open Smart Detection Mode SD Mode DAI J [2] J [1] J [0] 14 15 16 SD Mode Don'care t L[15] L[14] 1 2 L[ 0 ] Don'care t 1 M[15] M[14] M[13 ] 1 2 3 0 1 16 CLK High Low 1 2 1 LAT 0 tDET DAO OUT0 (current ) High I [2] I [1] I [0] E [15 ] E [14 ] L [15 ] L [14 ] L [13 ] Low On Frame Data I Frame Data J Frame Data L Off 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Set three CLK rising edges with LAT =‘H’ then two LAT falling edges with CLK is ‘H’ to operate Short Smart detection. A LED short failure will be identified when the output channel is off and there is a current passing through the output but the voltage is above VCC. LED Short Smart Detection Mode SD Mode DAI J [2] J [1] J [0] 14 15 16 SD Mode Don'care t L[15] L[14] 1 2 L[ 0 ] Don'care t 1 M[15 ] M[14 ] M[13 ] 1 2 3 0 1 2 3 16 High CLK Low 1 2 1 LAT 0 tDET DAO I [2] I [1] I [0] E [15 ] E [14 ] L [15 ] L [14 ] High L [13 ] Low OUT0 Frame Data I (current ) Frame On Frame Data L Data J Off The error report of LED status will be retrieved from DAO. Once there is any serial-out data at ’1’ be retrieved, controller can counts clocks to identify the locations of fail LED. The impression of “invisible failure detection” is achievable because of less data clock-in cycle and small current during detection to avoid a flash. After Smart detection, DM13H-E will return to normal operation until next detection. d. Outputs Short to GND Detection (Real-Time/Smart) This error detection mode could detect the failure of IC and PCB. If IC output pins are burned-out or output pins on PCB layout are short to ground, the voltage of IC output pins would be pulled to low voltage. It will make LEDs turn on all the time. Therefore, DM13H-E would determine the failure of IC output pins when the output voltage is below 0.1V. For the duration of output short to GND smart detection, the output would be turned off automatically and pulled high to VDD no matter channel is on or off. Set two CLK rising edges with LAT =‘H’ to operate Output Short to GND Real-Time detection. An output short failure will be identified when the output turn off but the voltage is below 0.1V. SD Mode Output Short to GND Real Time Detection Mode SD Mode 1 DAI J [2] J [1] J [0] 14 15 16 Don'care t L[15] L[14] 1 2 L[ 0 ] Don'care t M[15] M[14] M[13] 1 2 3 0 1 2 16 CLK High Low 1 LAT 0 tDET High DAO OUT0 (current ) I [2] I [1] I [0] E [15 ] E [14 ] L [15 ] L [14 ] L [13 ] Low On Fr ame Data I Fr ame Data L Fr ame Data J Off 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Set two CLK rising edges with LAT =‘H’ then sending two LAT falling edges with CLK is ‘H’ to operate Output Short to GND Smart detection. DM13H-E will force all outputs to turn off automatically, and start to detect output short error until the next rising edge of CLK pulse. After the rising edge of CLK, the output current will return to original value. After the detection, device will return to Normal Operation. Notice that enable control (EN ) won’t affect smart detection result. Output Short to GND Smart Detection Mode SD Mode DAI SD Mode 1 J [2] J [1] J [0] 14 15 16 Don'care t L[15] L[14] 1 2 L[ 0 ] Don'care t M[15 ] M[14 ] M[13 ] 1 2 3 0 1 2 16 CLK High Low 1 2 1 LAT 0 tDET DAO OUT0 (current ) High I [2] I [1] I [0] E [15 ] E [14 ] L [15 ] L [14] L [13 ] Low On Frame Data I Frame Data L Frame Data J Off Outputs Delay Large in-rush currents will occur when the system activates all the outputs at once. To prevent this effect, a constant unit of delay between outputs is built-in DM13H-E. All outputs are divided into four groups and each group contains four outputs. For example, OUT0 ~ OUT3 form the group1; OUT4 ~ OUT7 form the group2. There is no delay between every group. But each output delay between channels in a group is 3ns @VDD=3.3V (typical). OUT 0, 4, 8,12 OUT 1, 5, 9,13 OUT 2, 6, 10,14 OUT 3, 7, 11,15 tod tod tod 16-bit Constant Current LED Driver with Error Detection tod tod tod Version:A.004 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 DM13H-E Thermal Alarm and Shutdown DM13H-E provides a temperature error detection circuit for thermal alarm and shutdown protection. When junction temperature of the IC exceeds 130℃, the thermal flag(T130) will be serial-out in the CD mode. If no cooling measures to reduce the temperature(by system), the junction temperature might continue to rise. Once it reaches to 170℃, DM13H-E will turn off all outputs. When the junction temperature is lower than 130℃, DM13H-E will restart automatically. Operation in the over-temperature situation( > 130℃) for a long time may cause chip damage permanently. Thermal Flag Description 130℃ temperature flag T130 "H" : Temp ≧ 130℃, “ L” : Temp < 130℃ 170℃ temperature flag T170 "H" : Temp ≧ 170℃, “L” : Temp < 170℃ Shutdown Flag Tshut "H" : 16 outputs off, “L” : normal operation Normal Normal T130=1 170 C 130 C Normal Normal T130=1 Tshut=1 T170=0,Tshut=1 T170=1 In CD mode, thermal flags will be serial-out through DAO. According to these thermal flags, the control system can adopt proper way to protect whole display system. Please note the thermal flags are all ‘L’ in normal operation. 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E 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: 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: PD - Ta curve Power Dissipation Pd(W) 3 2.5 TSSOP24E 2 SSOP24 1.5 1 0.5 0 0 20 40 60 80 100 120 140 160 Ambient Temperature Ta ( ℃ ) 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.004 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 DM13H-E Package Outline Dimension SSOP24 Dimensions in inch Dimensions in mm Symbol MIN. TYP. MAX. MIN. TYP. MAX. A 0.053 0.064 0.069 1.346 1.626 1.753 A1 0.004 0.006 0.01 0.102 0.152 0.254 A2 - - 0.059 - - 1.499 b 0.008 - 0.012 0.203 - 0.305 C 0.007 - 0.01 0.178 - 0.254 D 0.337 0.341 0.344 8.56 8.661 8.738 E 0.228 0.236 0.244 5.791 5.994 6.198 e 0.025 BSC 0.635 BSC E1 0.15 0.154 0.157 3.81 3.912 3.988 L 0.016 0.025 0.05 0.406 0.635 1.27 L1 θ° 0.041 BSC 0 - 1.041 BSC 8 16-bit Constant Current LED Driver with Error Detection 0 - 8 Version:A.004 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 DM13H-E Package Outline Dimension TSSOP24E Dimensions in inch Dimensions in mm Symbol MIN. TYP. MAX. MIN. TYP. MAX. A - - 0.047 - - 1.2 A1 0 - 0.006 0 - 0.15 A2 0.031 0.039 0.041 0.8 1 1.05 b 0.007 - 0.012 0.19 - 0.3 D 0.303 7.8 0.311 7.7 7.8 7.9 E1 0.169 4.4 0.177 4.3 4.4 4.5 E 6.400 BSC 6.400 BSC e 0.650 BSC 0.650 BSC L1 1.000 REF 1.000 REF L 0.018 4.4 0.03 0.45 0.6 S 0.008 - - 0.2 - 0.75 - θ° 0 - 8 0 - 8 E2 0.09 - 0.112 2.28 - 2.85 D1 0.146 - 0.182 3.7 - 4.62 PAD SIZE2 (112×18E) 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Package Outline Dimension SOP24B 16-bit Constant Current LED Driver with Error Detection Version:A.004 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 DM13H-E Package Outline Dimension QFN24 DIMENSION (MM) SYMBOL DIMENSION (MIL) MIN. NOM. MAX. MIN. NOM. MAX. A 0.70 0.75 0.80 27.6 29.5 31.5 A1 0 0.02 0.05 0 0.79 1.97 A3 0.203 REF 8 REF b 0.18 0.25 0.30 7.09 9.84 11.81 D 3.90 4.00 4.10 153.5 157.5 161.4 D2 1.90 2.00 2.10 74.8 78.7 82.7 E 3.90 4.00 4.10 153.5 157.5 161.4 E2 1.90 2.00 2.10 74.8 78.8 82.7 e L y 0.50 BSC 0.30 0.40 0.50 0.08 16-bit Constant Current LED Driver with Error Detection 19.69 BSC 11.8 15.7 19.7 3.15 Version:A.004 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 DM13H-E 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. Silicon Touch Technology, Inc. reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 16-bit Constant Current LED Driver with Error Detection Version:A.004 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