DM632 Version : A.002 Issue Date : 2008/05/12 File Name : SP-DM632-A.002.doc Total Pages : 25 16-CHANNEL CONSTANT CURRENT LED DRIVER WITH PROGRAMMABLE PWM OUTPUTS 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 DM632 16-CHANNEL CONSTANT CURRENT LED DRIVER WITH PROGRAMMABLE PWM OUTPUTS General Description DM632 is a 16-channel constant current sink LED driver. Each channel has adjustable 16-bits (65536 steps) grayscale PWM control current outputs. It incorporates shift registers, data latches, constant current circuitry with current value set by an external resistor, selectable oscillator source for PWM functioning, and built-in LED open detection circuit to detect error status. It is specifically designed for LED display or lighting applications. Features z Constant-current outputs: 5mA to 90mA adjustable by one external resistor z 16-bit linear PWM control current outputs for each channel z Maximum output voltage: 17V z Maximum clock frequency: 25MHz z Selectable internal/external PWM reference clock z PWM free-running capability (refresh rate (~ 275Hz) with internal oscillator (~ 18 MHz)) z Build-in real-time open detection z Package and pin assignment (except QFN32) compatible to pure LED driver series (ST2221C, DM134/5/6, DM13C) z Power supply voltage: 3.3V to 5.5V Applications z Indoor/Outdoor LED Video Display z LED Variable Message Signs (VMS) System z LED Decorative Lighting Package Types z SOP24, SOP24B, SSOP24, TSSOP24E (with exposed pad), QFN32 (with exposed pad) 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Block Diagram OUT 0 OUT 1 OUT 15 LED Open Detector (0) LED Open Detector (1) LED Open Detector (15) Internal Oscillator Constant Current Driver (0) Constant Current Driver (1) Constant Current Driver (15) REXT 16-bit Counter 16-bit PWM Generator (0) 16-bit PWM Generator (1) 16-bit PWM Generator (15) SOMODE /GCK VCC GND 16 LAT 16-bit Latch Register (0) 16 DAI 16-bit Shift Register (0) 16 16-bit Latch Register (1) 16 16-bit Latch Register (15) 16 16-bit Shift Register (1) 16 16-bit Shift Register (15) DAO DCK 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Pin Connection 1 24 2 23 3 4 5 6 7 8 9 10 22 SOP24 SOP24B SSOP24 TSSOP24E 11 20 19 18 17 16 15 14 ( top view ) 13 OUT10 OUT9 OUT8 GND GND OUT7 OUT6 OUT5 25 26 27 28 29 30 31 32 1 24 23 2 22 3 21 20 19 QFN32 4 5 ( bottom view ) 18 6 7 17 8 16 15 14 13 12 11 10 9 GND GND VCC VCC GND GND GND GND DAI DCK LAT OUT0 OUT1 OUT2 OUT3 OUT4 12 21 VCC REXT DAO SOMODE/GCK OUT 15 OUT 14 OUT 13 OUT 12 OUT 11 OUT 10 OUT 9 OUT 8 REXT DAO SOMODE / GCK OUT15 OUT14 OUT13 OUT12 OUT11 GND DAI DCK LAT OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 Pin Description PIN No. PIN NAME FUNCTION SOP24/SOP24B/SSOP24/TSSOP24E: 1 TSSOP24E, QFN32: exposed pad QFN32: 1, 2, 5, 6, 7, 8, 20,21 GND Ground terminal. SOP24/SOP24B/SSOP24/TSSOP24E: 2 QFN32: 9 DAI Serial data input terminal. SOP24/SOP24B/SSOP24/TSSOP24E: 3 QFN32: 10 DCK Synchronous clock input terminal for serial data transfer. Data is sampled at the rising edge of DCK. LAT Input terminal of data strobe: ‘H’ means data on shift register goes through latch (level trigger), ‘L’ means data is latched. SOP24/SOP24B/SSOP24/TSSOP24E: 4 QFN32: 11 SOP24/SOP24B/SSOP24/TSSOP24E: 5~20 QFN32: 12~19, 22~29 OUT0~15 Sink constant-current outputs (open-drain). SOP24/SOP24B/SSOP24/TSSOP24E: 21 SOMODE /GCK QFN32: 30 Serial Out Mode Selection(SOMODE) : ‘H’: DAO is shifted out and synchronized to falling edge of DCK, ‘L’ : DAO is shifted out and synchronized to rising edge of DCK. Gray Scale Clock(GCK) : Input terminal for PWM operation. SOP24/SOP24B/SSOP24/TSSOP24E: 22 QFN32: 31 DAO Serial data output terminal. SOP24/SOP24B/SSOP24/TSSOP24E: 23 QFN32: 32 REXT External resistors connected between REXT and GND for output current value setting. SOP24/SOP24B/SSOP24/TSSOP24E: 24 QFN32: 3, 4 VCC Supply voltage terminal. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Equivalent Circuit of Inputs and Outputs 1. DCK, DAI, LAT , SOMODE/GCK terminals 2. DAO terminals PCB Layout Consideration To connect an external resistor to REXT pin and ground can determine the maximum output current. If there is any disturbance occurred to REXT pin, the constant current output may be unstable or noisy. Since REXT (pin23), DAO (pin22), and SOMODE/GCK (pin21) are next to each other, the most possible interference is caused by DAO or SOMODE/GCK signal. Accordingly, it is recommended that adding some shielding area within the above pins in PCB layout, or laying the signal line of above pins on different PCB layer will prevent the noise problems effectively. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 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 FDCK 25 MHz GND Terminal Current IGND 1600 mA 4.46 ( QFN32) 4.17 ( TSSOP24E exposed pad) Power Dissipation (4 layer PCB, at Ta=25℃) W 2.45 ( SOP24 ) PD 2.19 ( SOP24B ) 1.79 ( SSOP24 ) 28 ( QFN32 ) 30 ( TSSOP24E exposed pad) Thermal Resistance (4 layer PCB, at Ta=25℃) Rth(j-a) °C/W 51 (SOP24 ) 57 (SOP24B ) 70 (SSOP24 ) 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 IO OUTn 5 ⎯ 90 Output Current IOH VOH = VCC – 0.4 V -0.8 ⎯ -2 IOL VOL = 0.2 V VIH Input Voltage VIL *1 *2 VCC = 3.3 V ~ 5.5V +0.8 ⎯ +2 0.8VCC ⎯ VCC 0.0 ⎯ 0.2VCC Input Clock Frequency FDCK Single Chip Operation ⎯ ⎯ 25 Input PWM Frequency FGCK 3.3V~5.5V ⎯ ⎯ 25 LAT Pulse Width Tw LAT 15 ⎯ ⎯ DCK Pulse Width Tw DCK 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 ⎯ ⎯ FOSC 14.4 18 21.6 Internal Oscillator Frequency *1 *2 VCC = 5.0V V mA V MHz ns MHz 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-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 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 Output Leakage Current IOL VOH = 17 V ⎯ ⎯ ±1.0 VOL IOL = 1.25 mA ⎯ ⎯ 0.2 VOH IOH= 1.2 mA VCC-0.4 ⎯ ⎯ ⎯ ⎯ ±3 % 25.79 ⎯ 29.08 mA Rrext = 2.2 KΩ VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5 % / VCC Rrext = 2.2 KΩ ⎯ ±1 ±4 V(od) all outputs turn on ⎯ 0.3 ⎯ IDD(off) power on all pins are open unless VCC and GND (fee-running mode) ⎯ 5.39 6.5 IDD(off) power on all pins are open unless VCC and GND (external GCK mode) ⎯ 4.57 ⎯ IDD(on) input signal is static Rrext = 12.4 KΩ all outputs turn off ⎯ 5.91 ⎯ IDD(on) input signal is static Rrext = 2.2 KΩ all outputs turn off ⎯ 8.10 ⎯ IDD(on) input signal is static Rrext = 560 Ω all outputs turn off ⎯ 17.11 ⎯ Output Voltage (S-OUT) Output Current Skew (Channel-to-Channel) IOL1 *1 IOL2 *2 Output Voltage Regulation % / VOUT Supply Voltage Regulation LED Open Detection Threshold Supply Current V uA V VOUT = 1.0 V Rrext = 2.2 KΩ Output Current Skew (Chip-to-Chip) UNIT *3 %/V V 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-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Electrical Characteristics (VCC = 3.3 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 Output Leakage Current IOL VOH = 17 V ⎯ ⎯ ±1.0 VOL IOL = 1.25 mA ⎯ ⎯ 0.2 VOH IOH= 1.2 mA VCC-0.4 ⎯ ⎯ ⎯ ⎯ ±3 % 25.79 ⎯ 29.08 mA Rrext = 2.2 KΩ VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5 % / VCC Rrext = 2.2 KΩ ⎯ ±1 ±4 V(od) all outputs turn on ⎯ 0.3 ⎯ IDD(off) power on all pins are open unless VCC and GND (fee-running mode) ⎯ 3.8 ⎯ IDD(off) power on all pins are open unless VCC and GND (external GCK mode) ⎯ 3.39 ⎯ IDD(on) input signal is static Rrext = 12.4 KΩ all outputs turn off ⎯ 4.33 ⎯ IDD(on) input signal is static Rrext = 2.2 KΩ all outputs turn off ⎯ 6.54 ⎯ IDD(on) input signal is static Rrext = 560 Ω all outputs turn off ⎯ 15.10 ⎯ Output Voltage (S-OUT) Output Current Skew (Channel-to-Channel) IOL1 *1 IOL2 *2 Output Voltage Regulation % / VOUT Supply Voltage Regulation LED Open Detection Threshold Supply Current V uA V VOUT = 1.0 V Rrext = 2.2 KΩ Output Current Skew (Chip-to-Chip) UNIT *3 %/V V 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-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Switching Characteristics (VCC = 5.0V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL Propagation Delay GCK-to-OUT (‘L’ to ‘H’) DCK-to-DAO Propagation Delay GCK-to-OUT CONDITION MIN. TYP. MAX. ⎯ 45.74 ⎯ ⎯ 37.16 ⎯ ⎯ 23.76 ⎯ ⎯ 27.82 ⎯ ⎯ 18 ⎯ ⎯ 6.96 ⎯ ⎯ 33 ⎯ ⎯ ⎯ 4.6 ms UNIT tpLH UNIT VIH = VCC DCK-to-DAO (‘H’ to ‘L’) VIL = GND tpHL Rrext = 2.2 KΩ Output Current Rise Time tor Output Current Fall Time tof Output to output Delay Time Unit VL = 5.0 V CL = 13 pF td Output Current (Propagation Delay after LAT trigger) top*1 ns Switching Characteristics (VCC = 3.3V, Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. ⎯ 48.8 ⎯ ⎯ 21.2 ⎯ ⎯ 29.6 ⎯ Rrext = 2.2 KΩ ⎯ 17.6 ⎯ VL = 3.3 V ⎯ 20 ⎯ ⎯ 8.25 ⎯ ⎯ 34 ⎯ ⎯ ⎯ 4.6 GCK-to-OUT Propagation Delay (‘L’ to ‘H’) DCK-to-DAO Propagation Delay GCK-to-OUT tpLH VIH = VCC DCK-to-DAO (‘H’ to ‘L’) VIL = GND tpHL Output Current Rise Time tor Output Current Fall Time tof Output to output Delay Time Unit td Output Current (Propagation Delay after LAT trigger) CL = 13 pF top*1 ns ms VL VCC DAI A OUTn DCK CL CL CL CL REXT LAT SOMODE DAO /GCK Rrext CL GND Switching Characteristics Test Circuit *1 Reload the new PWM data at the end of the last PWM frame. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Constant-Current Output Constant-current value (Iout*1)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 1.23V. The output current value is calculated by the following equation: Iout(mA) 5 10 20 30 40 50 60 70 80 90 M 50.86 48.60 48.39 47.66 46.97 46.13 44.74 43.94 43.20 42.24 O utput C urre nt a s a Func tiono R e xt va lue 100 90 80 70 Iout (mA) ~ Iout(mA) 60 50 Vrext (V) × M Rrext (KΩ) 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 2.8 3 R e xt(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 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. *1 Iout is typical current value setting under 100% PWM duty cycle. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Serial Data Interface The serial-in data (DAI) will be clocked into 16 × 16 bit shift registers synchronized on the rising edge of the clock (DCK). The data will be transferred into the 16 × 16 bit latch registers when the strobe signal ( LAT ) is kept at high level (level trigger); otherwise, the data will be held. 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) will be shifted out on synchronization to the rising edge of the clock if serial out selection (SOMODE) is kept at low level. And if serial out selection (SOMODE) is kept at high level, the serial-out data (DAO) will be shifted out on synchronization to the falling edge of the clock (DCK). Input Data Format LED Open Detection DM632 provides a real time monitor of LED open detection function without extra components or circuit design. It will be identified as a LED open failure when the output is turned on but the output voltage is below 0.3V. The test result of each channel will write to its correspondent shift register which is in LSB position (D15[0], D14[0], …., D0[0]) while strobe signal is active. User can refer to timing diagram on page13. Detecting report could be retrieved from serial-out (DAO) data. If the system reads ‘1’ back, that indicates LED is in normal status. But if ‘0’ was retrieved then LED open failure has occurred. In order to make sure LED open detection function is in well operating condition, it is recommended that all the luminance data are wrote to ‘1’ then almost turning on the outputs during detection process. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Serial-out Data Format Selection of Internal/External PWM Frequency The default operation mode is the free-running PWM signal generated by internal oscillator after power-on. Users could switch internal to external PWM frequency source by following timing sequence. There are two alternative options could be selected. The option 1 shows three rising edge of latch pulses ( LAT ) when the clock (DCK) kept at high level then two rising edge of clock (DCK) pulses when the latch pulse ( LAT ) kept at high level. Then the SOMODE/GCK pin could input external frequency to operate PWM function. The option 2 shows four rising edge of latch pulses( LAT ) when clock(DCK) kept at high level then sending three rising edge of clock (DCK) signal, while latch( LAT ) signal kept high level at the same time. Meanwhile the GCK external mode can be set back to the free-running mode. Notice that when internal RESET at low level, all the shift registers in DM632 will be cleared (Kept at Low level) and all output current will be off immediately. DCK LAT Normal Operation 1 t 2 1 DCK 2 3 DCK 1 2 3 1 LAT LAT RESET (internal) RESET (internal) 2 3 4 t t Option 1 : Timing Combination to set up external GCK mode 16-channel 16-bit PWM Constant Current LED Driver Option 2 : Timing Combination to set up free-running mode Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Timing Diagram 1. DCK-DAI, DAO (SOMODE = ”L” at free-running mode, or external GCK mode) tw DCK 50% tw DCK 50% 50% 50% DCK t setup(D) thold(D) 50% 50% DAI 50% DAO 50% tpLH tpHL 2. DCK, DAO (SOMODE = “H” at free-running mode) tw DCK DCK 50% twDCK 50% 50% 50% 50% DAO 50% tpLH tpHL 3. DCK-LAT 50% 50% DCK t setup(L) t hold(L) 50% 50% LAT twLAT 4. Output to Output Delay Time Unit (n=2,3,4,5,6,7, 10, 11, 12, 13, 14, 15) 50% OUTn td 50% OUTn-2 5. GCK-OUT0 50% 50% GCK 50% OUT0 tpLH 16-channel 16-bit PWM Constant Current LED Driver 50% t pHL Version:A.002 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 1 OUTn E[0]*2 16-channel 16-bit PWM Constant Current LED Driver 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. Version:A.002 When using external frequency for PWM operation, the PWM refresh rate (frame rate) can be calculated by following equation: *8 DC[254] 2 8 DC [253] DD[254] Frame Data C* 1 DD[255] off on 0 1 low high 0 1 low high 0 1 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 For example, if the refresh rate in display system is higher than 60Hz, the input GCK frequency must be higher than 4MHz. Total PWM resolution ( 216 ) Input GCK Frequency (Hz) While switching to external GCK mode, outputs will be active after 65536 GCK pulse. *7 Refresh Rate (Hz) = Starting the new PWM frame after the last PWM period finish completely. DC[255] While switching to external GCK mode, all registers in DM632 will be reset simultaneously. 65536 x GCK*7 256 DC[0] *6 2 DC[254] *5 DB[255] 1 DC[255] SOMODE function work in free-running mode. Frame Data A 256 DB [0] LAT is level trigger, not edge trigger. DA[1] 255 DB [1] *4 254 DB[2] *3 <1 frame*6 DA[254] 2 DB[254] E[0] is the error message of LED open detection. DA[255] 1 DB[255] DAO is shifted out on synchronization to rising / falling edge of DCK according to SOMODE is｀L＇/｀H＇. 256 DA[0] *2 Frame Data Z E[0]*2 255 254 DZ[1] DA[1] DA[2] *1 (current) 5 * SOMODE* /GCK 4 LAT * 3 DAO * DCK DAI 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. DM632 Timing Diagram (free-running mode switch to external GCK mode) Page 13 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Frame Data E off on 0 1 high low 0 1 DF [253] low high DF [254] 2 One free-running PWM cycle 256 2 ED [253] ED[254] 2 16-channel 16-bit PWM Constant Current LED Driver OUTn (current) SOMODE/GCK LAT DAO 256 DCK DAI DD[0] ED [255] Frame Data C 1 DE[255] DE[254] 256 Frame Data D EE [255] DE[0] EE [254] EE [253] 1 DF[255] DF[254] DF [0] DF [255] 1 0 DG[255] DG[254] 1 Timing Diagram (external GCK mode switch to free-running mode) Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Output Modulation Technique DM632 provides a new LED drive technique of output modulation. It mixes traditional Pulse Width Modulation (PWM) represented by LSB 12 bit with Sequential Split Modulation (SSM) represented by MSB 4 bit. The main benefits of SSM are to drive LED with an equivalent higher refresh rate (up to 380Hzn in DM632 when FGCK = 25MHz) and change bit to next bit smoothly. The relationships between PWM and SSM in time domain can be refer to the diagram (not to scale) below: A complete modulation cycle 0 8 1 9 2 10 3 11 4 12 5 13 6 14 7 15 Sequential Split Modulation represented by Bit [15:12] t Traditional PWM Width represented by Bit [11:0] Bit[15:0] MSB LSB 0000 XXXX,XXXXXXXX Bit[11:0] (PWM) A complete modulation cycle on off Bit[11:0] (PWM) on MSB LSB 0001 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 0110 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 0111 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 1000 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 1001 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 1110 XXXX,XXXXXXXX off Bit[11:0] (PWM) on MSB LSB 1111 XXXX,XXXXXXXX 65536 clocks off t Ultra High Resolution Current Outputs DM632 could provide 16-bit linear PWM control current outputs for each channel. There are two advantages for system design. One is DM632 has sufficient bit resolution (65536 steps), not only LED color information but additional data such as global brightness, dot correction, and gamma correction can be represented by the proper algorithms. The other is to reduce a lot of clock and data rate compared to conventional ON-OFF type LED drivers. 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Global Brightness Control DM632 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. Here show different ways to adjust the Rrext value or voltage drop across the external resistor. Please see the reference circuit below: Output to Output Delay DM632 has build-in output to output delay with a special arrangement. This arrangement help chip avoid noise cause by large current during channels switching. The arrangement details are shown as following table. Channel 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Delay units 0 4 1 5 2 6 3 7 3 7 16-channel 16-bit PWM Constant Current LED Driver 2 6 1 Version:A.002 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. 5 0 4 Page 16 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 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: 5 QFN32 Power Dissipation Pd(W) 4.5 Tj(max)=150°C 4 Rth(QFN32)=28 °C/Watt TSSOP24 3.5 Rth(TSSOP24)=30°C/Watt 3 Rth(SOP24)=51°C/Watt SOP24 2.5 Rth(SOP24B)=57°C/Watt 2 SOP24B 1.5 SSOP24 Rth(SSOP24)=70°C/Watt 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-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Typical Application DM632 DM632 DM632 DM632 DM632 DM632 DM632 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Package Outline Dimension DM632-SSOP 12 A C A2 1 SEATING PLANE b e L 0.004 L1 DIMENSIONS IN INCH MIN. MAX. MIN. MAX. A 0.053 0.069 1.346 1.753 A1 0.004 0.010 0.102 0.254 A2 - 0.059 - 1.499 b 0.008 0.012 0.203 0.305 C 0.007 0.010 0.178 0.254 D 0.337 0.344 8.560 8.738 E 0.228 0.244 5.791 6.198 E1 0.150 0.157 3.810 3.988 L L1 Θ 0.025 BSC. 0.016 0.050 0.041 BSC 0° 16-channel 16-bit PWM Constant Current LED Driver 8° DETAIL A DIMENSIONS IN MM SYMBOLS e A1 GAUGE PLANE A 13 E 24 E1 D 0.635 BSC 0.406 1.270 1.041 BSC 0° 8° Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Package Outline Dimension DM632-SOPB DIMENSIONS IN INCH DIMENSIONS IN MM SYMBOLS MIN. MAX. MIN. MAX. A - 0.075 - 1.900 A1 0.002 0.008 0.050 0.200 A2 0.051 0.067 1.300 1.700 b 0.012 0.020 0.300 0.500 c 0.004 0.010 0.100 0.250 D 0.504 0.520 12.800 13.200 E 0.303 0.327 7.700 8.300 e 0.0394 BSC 1.000 BSC E1 0.228 0.244 5.800 6.200 L 0.010 0.026 0.250 0.650 θ 0° 10° 0° 10° 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Package Outline Dimension E H DM632-SOP b e A 0.01 inch D GAUGE PLANE SEATING PLANE A1 0.004MAX. DIMENSIONS IN INCH DIMENSIONS IN MM SYMBOLS MIN. MAX. MIN. MAX. A - 0.104 - 2.642 A1 0.004 - 0.102 b 0.016 BSC - 0.406 BSC D 0.612 0.624 15.545 15.850 E 0.292 0.299 7.417 7.595 e L 0.050 BSC 1.270 BSC H 0.405 0.419 10.287 10.643 L 0.021 0.041 0.533 1.041 Θ 0° 8° 0° 8° 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Package Outline Dimension DM632-TSSOP (exposed pad) D1 24 E2 E E1 13 12 1 e b 0.25mm S GAUGE PLANE SEATING PLANE A A2 D L L1 A1 0.05 DIMENSIONS IN INCH DIMENSIONS IN MM SYMBOLS MIN. MAX. MIN. MAX. A - 0.047 - 1.20 A1 0.000 0.006 0.00 0.15 A2 0.031 0.041 0.80 1.05 b 0.007 0.012 0.19 0.30 D 0.303 0.311 7.70 7.90 E1 0.169 0.177 4.30 4.50 E 0.252 BSC e 0.026 BSC 0.650 BSC L1 0.039 REF 1.000 REF. L 0.018 6.400 BSC 0.030 0.45 0.75 S 0.008 - 0.20 - Θ 0° 8° 0° 8° E2 0.0898 0.1122 2.280 2.850 D1 0.146 1.819 3.700 4.620 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 Package Outline Dimension DM632-QFN (exposed pad) D2 25 b 32 24 1 E E2 CO.35x45° e 17 16 A1 D 8 9 L A3 K 0.08 A DIMENSIONS IN INCH DIMENSIONS IN MM SYMBOLS MIN. MAX. MIN. MAX. A 0.028 0.031 0.70 0.80 A1 0 0.002 0 0.05 A3 0.008 REF. 0.203 REF. b 0.007 0.012 0.180 0.300 D 0.193 0.201 4.900 5.100 E 0.193 0.201 4.900 5.100 e 0.0197 BSC 0.500 BSC L 0.012 0.020 0.30 0.50 K 0.0079 - 0.2 - D2 0.049 0.128 1.25 3.25 E2 0.049 0.128 1.25 3.25 Note: 1.DIMENSIONING AND TOLERANCING CONFORM TO ASME Y145.5M-1994. 2. REFER TO JEDEC STD. MO-220 WHHD-2 ISSUE A 16-channel 16-bit PWM Constant Current LED Driver Version:A.002 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. 新竹市科學園區展業一路 9 號 7 樓之 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM632 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-channel 16-bit PWM Constant Current LED Driver Version:A.002 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