austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: [email protected] Please visit our website at www.ams.com Da t as heet AS1113 50mA, 16-Channel LED Driv e r w i t h D i a g n o s t i c s 2 Key Features ! The AS1113 is designed to drive up to 16 LEDs through a fast serial interface and features 16 output constant current drivers and an on-chip diagnostic read-back function. ! 16 Constant-Current Output Channels Excellent Output Current Accuracy al id 1 General Description - Between Channels: <±3% - Between Devices: <±6% The high clock-frequency (up to 50MHz), adjustable output current, and flexible serial interface makes the device perfectly suited for high-volume transmission applications. Output Current Per Channel: 0.5 to 50mA ! Controlled In-Rush Current Output current is adjustable (up to 50mA/channel) using an external resistor (REXT). ! Over-Temperature, Open-LED, Shorted-LED Diagnostic Functions The serial interface with Schmitt trigger inputs includes an integrated shift register. Additionally, an internal data register stores the currently displayed data. ! Low-Current Test Mode ! Global Fault Monitoring The device features integrated diagnostics for overtemperature, open-LED, and shorted-LED conditions. Integrated registers store global fault status information during load as well as the detailed temperature/openLED/shorted-LED diagnostics results. ! Low Shutdown Mode Current: 10µA ! Fast Serial Interface: 50MHz ! Cascaded Configuration ! Extremely Fast Output Drivers Suitable for PWM ! 24-pin SSOP and 28-pin QFN (5x5mm) Package am lc s on A te G nt st il lv ! The AS1113 also features a low-current diagnostic mode to minimize display flicker during fault testing. The AS1113 is available in a 24-pin SSOP and the 28pin QFN (5x5mm) package. 3 Applications If a higher output current is needed, please see the AS1110 with 100mA drive capability. Te LD www.austriamicrosystems.com/LED-Driver-ICs/AS1113 OEN REXT Revision 1.04 OUTN15 OUTN14 OUTN13 OUTN12 OUTN11 OUTN10 OUTN9 AS1113 SDI CLK OUTN7 OUTN6 OUTN5 OUTN4 OUTN3 OUTN2 OUTN1 ch OUTN0 +VLED ni Figure 1. Main Diagram and Pin Assignments OUTN8 ca The device is ideal for fixed- or slow-rolling displays using static or multiplexed LED matrix and dimming functions, large LED matrix displays, mixed LED display and switch monitoring, displays in elevators, public transports (underground, trains, buses, taxis, airplanes, etc.), large displays in stadiums and public areas, price indicators in retail stores, promotional panels, bar-graph displays, industrial controller displays, white good panels, emergency light indicators, and traffic signs. SDO GND VDD 1 - 24 AS1113 Datasheet Contents 1 General Description ................................................................................................................................ 1 2 Key Features .......................................................................................................................................... 1 3 Applications ............................................................................................................................................ 1 4 Pinout ..................................................................................................................................................... 3 al id Pin Assignments ..................................................................................................................................................... 3 Pin Descriptions ..................................................................................................................................................... 3 5 Absolute Maximum Ratings .................................................................................................................... 4 6 Electrical Characteristics ........................................................................................................................ 5 Switching Characteristics ....................................................................................................................................... 6 lv 7 Typical Operating Characteristics ........................................................................................................... 7 8 Detailed Description ............................................................................................................................... 8 Serial Interface ....................................................................................................................................................... 9 am lc s on A te G nt st il Timing Diagrams .................................................................................................................................................... 9 Error-Detection Mode ........................................................................................................................................... 11 Global Error Mode ................................................................................................................................................ 11 Error Detection Functions ..................................................................................................................................... 12 Open-LED Detection ..................................................................................................................................... 12 Shorted-LED ................................................................................................................................................. 12 Overtemperature ........................................................................................................................................... 12 Detailed Error Reports .......................................................................................................................................... 13 Detailed Temperature Warning Report ......................................................................................................... Detailed Open-LED Error Report .................................................................................................................. Detailed Shorted-LED Error Report .............................................................................................................. Low-Current Diagnostic Mode ....................................................................................................................... 13 14 15 15 Shutdown Mode .................................................................................................................................................... 16 9 Application Information ......................................................................................................................... 17 Error Detection ..................................................................................................................................................... 17 ca Error Detection On-The-Fly ........................................................................................................................... 17 Error Detection with Low-Current Diagnosis Mode ....................................................................................... 17 Cascading Devices ............................................................................................................................................... 18 Constant Current .................................................................................................................................................. 19 ni Adjusting Output Current ...................................................................................................................................... 19 Package Power Dissipation .................................................................................................................................. 19 Delayed Outputs ................................................................................................................................................... 19 ch Switching-Noise Reduction .................................................................................................................................. 19 Load Supply Voltage ............................................................................................................................................. 19 10 Package Drawings and Markings ....................................................................................................... 21 Te 11 Ordering Information ........................................................................................................................... 23 www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 2 - 24 AS1113 Datasheet - P i n o u t 4 Pinout Pin Assignments al id OUTN8 OUTN9 OUTN10 OUTN11 OUTN12 OUTN13 OUTN14 OUTN15 OEN SDO 1 21 SDO LD 2 20 OEN 24 23 22 21 20 19 18 17 16 15 14 13 OUTN0 3 AS1113 19 OUTN15 OUTN1 4 28-pin QFN 5x5 18 OUTN14 OUTN2 5 17 OUTN13 OUTN3 6 16 OUTN12 OUTN4 7 15 OUTN11 lv CLK VDD 28 27 26 25 24 23 22 REXT VDD REXT GND GND GND SDI GND Figure 2. Pin Assignments (Top View) AS1113 5 6 SDI CLK LD OUTN0 OUTN1 7 8 9 10 11 12 OUTN4 4 OUTN3 3 OUTN2 2 OUTN7 OUTN6 OUTN9 OUTN10 OUTN5 am lc s on A te G nt st il OUTN6 OUTN8 OUTN5 10 11 12 13 14 N/C 9 OUTN7 8 Pin Descriptions 1 GND 24-pin SSOP Table 1. Pin Descriptions SSOP QFN 1 24:27 2 28 3 1 4 2 5:20 3:10 12:19 Pin Name Description GND Ground SDI Serial Data Input CLK Serial Data Clock. The rising edge of the CLK signal is used to clock data into and out of the AS1113 shift register. In error mode, the rising edge of the CLK signal is used to switch error modes. LD Serial Data Load Output Current Drivers. These pins are used as LED drivers or for input sense for diagnostic modes. Data is transferred to the data register at the rising edge of these pins. ca Pin Number OUTN0:15 21 SDO Serial Data Output. In normal mode SDO is latched out 8.5 clock cycles after SDI is latched in. In global error detection mode this pin indicates the occurrence of a global error. 0 = Global error mode returned an error. 1 = No errors. 23 22 REXT External Resistor Connection. This pin connects through the external resistor (REXT) to GND, to setup the load current. 24 23 VDD Positive Supply Voltage - 11 N/C Not connected 20 ch 21 ni OEN Output Enable. The active-low pin OEN signal can always enable output drivers to sink current independent of the AS1113 mode. 0 = Output drivers are enabled. 1 = Output drivers are disabled. Te 22 www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 3 - 24 AS1113 Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameter Min Max Units VDD to GND 0 7 V Input Voltage -0.4 VDD +0.4 V Output Voltage -0.4 V mA 88 ºC/W on PCB, 24-pin SSOP package 23 ºC/W on PCB, 28-pin QFN (5x5mm) package am lc s on A te G nt st il Thermal Resistance ΘJA 15 1000 lv GND Pin Current Comments al id Table 2. Absolute Maximum Ratings Ambient Temperature -40 +85 ºC Storage Temperature -55 150 ºC Humidity 5 86 % Non-condensing kV Norm: MIL 833 E method 3015 mA EIA/JESD78 ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020D “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for Pb-free leaded packages is matte tin (100% Sn). Electrostatic Discharge Digital Outputs 2 All Other Pins 2 Latch-Up Immunity +100 + -100 (INOM x 0.5) INOM +260 Te ch ni ca Package Body Temperature www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 4 - 24 AS1113 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VDD = +3.0V to +5.5V, TAMB = -40°C to +85ºC (unless otherwise specified). Table 3. Electrical Characteristics Condition VDD Supply Voltage VDS Output Voltage IOUT IOH Max Unit 3.0 5.5 V OUTN0:15 0 15.0 V OUTN0:15 0.5 SDO -1.0 SDO 1.0 Output Current IOL VIH High Level Input Voltage VIL IDS(OFF) VOH Output Leakage Current Output Voltage Typ 50 mA 0.7 x VDD VDD + 0.3 0.3 x VDD -0.3 OEN = 1, VDS = 15.0V 0.5 am lc s on A te G nt st il VOL CLK, OEN, LD, SDI Low Level Min al id Parameter lv Symbol IOL = +1.0mA SDO IOH = -1.0mA V µA 0.4 VDD 0.4V V Device-to-Device Average Output Current from OUTN0 to OUTN15 VDS = 0.5V, VDD = Const., REXT = 744Ω 25.25 ΔIAV(LC1) Current Skew (Between Channels) VDS ≥ 0.5V, VDD = Const., REXT = 744Ω ±1.5 IAV(LC2) Device-to-Device Average Output Current from OUTN0 to OUTN15 VDS = 0.6V, VDD > 3.3V, REXT = 372Ω 50.5 ΔIAV(LC2) Current Skew (Between Channels) VDS ≥ 0.6V, VDD = Const., REXT = 372Ω ±1.5 ±3 % ILC Low-Current Diagnosis Mode VDS = 0.8V, VDD = 5.0V 0.6 0.8 mA IPD Power Down Supply Current VDS = 0.8V, VDD = 5.0V, REXT = 372Ω, OUTN0:15 = On 10 20 µA %/ΔVDS Output Current vs. Output Voltage Regulation VDS within 1.0 and 3.0V ±0.1 %/V %/ΔVDD Output Current vs. Supply Voltage Regulation VDD within 3.0 and 5.0V ±1 %/V RIN(UP) Pullup Resistance OEN 250 500 800 kΩ RIN(DOWN) Pulldown Resistance LD 250 500 800 kΩ VTHL Error Detection Threshold Voltage 0.25 0.3 0.45 V VDD = 3.0V 1.2 1.3 1.4 VDD = 5.0V 2.0 2.2 2.4 ni Error Detection Threshold Voltage ch VTHH ca IAV(LC1) TOV1 Overtemperature Threshold Flag IDD(OFF)0 Te IDD(OFF)1 IDD(OFF)2 IDD(ON)1 IDD(ON)2 Off Supply Current On www.austriamicrosystems.com/LED-Driver-ICs/AS1113 0.4 ±3 150 % mA V ºC REXT = Open‚ OUTN0:15 = Off 2.7 6 REXT = 744Ω‚ OUTN0:15 = Off 4.3 8 REXT = 372Ω‚ OUTN0:15 = Off 5.4 9 REXT = 744Ω‚ OUTN0:15 = On 6.2 11 REXT = 372Ω‚ OUTN0:15 = On 10.5 15 Revision 1.04 mA mA 5 - 24 AS1113 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s Switching Characteristics VDD = 3.0 to 5.5V, VDS = 0.8V, VIH = VDD, VIL = GND, REXT = 372Ω, VLOAD = 4.0V, RLOAD = 64Ω, CLOAD = 10pF; guaranteed by design. Table 4. Switching Characteristics for VDD = 5V Propagation Delay Time (Without Staggered Output Delay) Conditions CLK - SDO LD - OUTNn OEN - OUTNn Min CLK LD OEN (@IOUT < 60mA) 15 15 200 Typ 5 100 100 Propagation Delay Time Pulse Width * CLK Rise Time * CLK Fall Time tF tOR tOF Max 10 200 200 10 tTESTING tSTAG tSU(OE) tGSW(ERROR) tSU(ERROR) tP(I/O) tSW(ERROR) fCLK Low-Current Test Mode Propagation Delay Time tREXT2,1 External Resistor Reaction Time tREXT2,1 External Resistor Reaction Time ca tP3,ON tP3,OFF * ns ns ns 500 ns 500 ns 100 100 200 300 20 40 ns ns ns ns ns ns ns ns ns ns ns ns ns am lc s on A te G nt st il Output Rise Time of VOUT (Turn Off) Output Fall Time of VOUT (Turn On) Setup Time for SDI Hold Time for SDI Setup Time for LD Hold Time for LD OEN Time for Error Detection Staggered Output Delay Output Enable Setup Time Global Error Switching Setup Time Global Error Detection Setup Time Propagation Delay Global Error Flag Switching Time Global Error Flag Maximum Clock Frequency (Cascade Operation) tSU(D) tH(D) tSU(L) tH(L) Unit lv tR Parameter al id Symbol tP1 tP2 tP3 tP4 tW(CLK) tW(L) tW(OE) 5 5 5 5 2000 20 10 10 5 10 30 Turn ON Turn OFF Change from REXT1 = 372Ω, IOUT1 = 50.52mA to REXT2 = 37.2kΩ, IOUT2 < 1mA Change from REXT1 = 37.2kΩ, IOUT1 = 0.5mA to REXT2 = 372Ω, IOUT2 > 25mA 50 MHz 3 0.05 5 0.1 µs µs 0.5 1 µs 0.5 1 µs Te ch ni If multiple AS1113 devices are cascaded and tr or tf is large, it may be critical to achieve the timing required for data transfer between two cascaded LED drivers. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 6 - 24 AS1113 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 7 Typical Operating Characteristics Figure 3. Output Current vs. REXT, VDD = 5V; VDS = 0.8V, TAMB = 25°C Figure 4. Relative Output Current Error vs. VDD, Iout/Iout@VDD=5V - 1, TAMB = 25°C 2 Relative Output Current Error (%) . 100 0.5 10 al id 1 REXT = 744Ω; VDS = 0.5V 0 -0.5 REXT = 372Ω; VDS = 0.6V -1 lv IOUT (mA) . 1.5 -1.5 1 100 REXT (Ω) 3.5 4 4.5 5 5.5 Figure 6. Output Current vs. VDS; VDD = 5V, TAMB = 25°C 60 50 50 REXT = 376Ω 40 REXT = 376Ω IOUT (mA) . IOUT (mA) . 3 VDD (V) Figure 5. Output Current vs. VDS; VDD = 5V, TAMB = 25°C 60 -2 10000 am lc s on A te G nt st il 1000 REXT = 470Ω 30 REXT = 627Ω 20 REXT = 940Ω 10 40 REXT = 470Ω 30 REXT = 627Ω 20 REXT = 940Ω 10 0 0 0 3 6 9 12 15 0 VDS (V) 0.2 0.4 0.6 0.8 1 1.2 Te ch ni ca VDS (V) www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 7 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1113 is designed to drive up to 16 LEDs through a fast serial interface and 16 constant-current output drivers. Furthermore, the AS1113 provides diagnostics for detecting open- or shorted-LEDs, as well as over-temperature conditions for LED display systems, especially LED traffic sign applications. al id The AS1113 contains an 16-bit shift register and an 16-bit data register, which convert serial input data into parallel output format. At AS1113 output stages, sixteen regulated current sinks are designed to provide uniform and constant current with excellent matching between ports for driving LEDs within a wide range of forward voltage variations. External output current is adjustable from 0.5 to 50mA using an external resistor for flexibility in controlling the brightness intensity of LEDs. The AS1113 guarantees to endure 15V maximum at the outputs. The serial interface is capable of operating at a minimum of 30 MHz, satisfying the requirements of high-volume data transmission. lv Using a multiplexed input/output technique, the AS1113 adds additional functionality to pins SDO, LD and OEN. These pins provide highly useful functions (open- and shorted-LED detection, over-temperature detection), thus reducing pin count. Over-temperature detection will work on-the-run, whereas the open- and shorted-LED detection can be used on-the-run or in low-current diagnostic mode (see page 15). Temperature Detection REXT 16-Bit Open Detection & Error Register 16-Bit Short Detection & Error Register OUTN15 OUTN14 OUTN13 OUTN12 OUTN11 OUTN10 OUTN9 OUTN8 OUTN7 OUTN6 OUTN5 OUTN4 OUTN3 OUTN2 OUTN1 OUTN0 +VLED am lc s on A te G nt st il Figure 7. AS1113 - Block Diagram AS1113 Current Generators OEN LD Detailed Error Detection Global Error Detection ca 16-Bit Data Register CLK 16-Bit Shift Register Control Logic ni SDI Te ch SDO Indicates 16 Bit Path www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 8 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Serial Interface Data accesses are made serially via pins SDI and SDO. At each CLK rising edge, the signal present at pin SDI is shifted into the first bit of the internal shift register and the other bits are shifted ahead of the first bit. The MSB is the first bit to be clocked in. In error-detection mode the shift register will latch-in the corresponding error data of temperature-, open-, and short-error register with each falling edge of LD. al id The 16-bit data register will latch the data of the shift register at each rising edge of LD. This data is then used to drive the current generator output drivers to switch on the corresponding LEDs as OEN goes low. Timing Diagrams This section contains timing diagrams referenced in other sections of this data sheet. lv Figure 8. Normal Mode Timing Diagram tW(CLK) tSU(D) SDI 50% SDO 50% 50% am lc s on A te G nt st il 50% CLK tH(D) 50% 50% tP1 tW(L) LD 50% 50% tSU(L) OEN tH(L) OEN Low = Output Enabled OUTNx OUTNx High = Output Off 50% OUTNx Low = Output On ca tP2 ch OEN ni Figure 9. Output Delay Timing Diagram 50% tP3 50% tOR tSTAG tSTAG 50% 50% 14XtSTAG 50% OUTN15 Revision 1.04 50% 10% 10% tOF OUTN1 www.austriamicrosystems.com/LED-Driver-ICs/AS1113 tP3 90% 90% Te OUTN0 tW(OE) 50% 14XtSTAG 50% 9 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Figure 10. Data Input Timing Diagram OEN tW(OE) tSU(L) LD tW(L) al id 16 CLK Pulses CLK Data Bit 15 Data Bit 14 Data Bit 13 Data Bit 12 Data Bit Data Bit n 2 Data Bit 1 lv tSU(D) SDI0 Data Bit 0 Don’t Care am lc s on A te G nt st il tH(D) Old Data Old Data Old Data Old Data Old Data Old Data Old Data Old Data Bit 15 Bit 14 Bit 13 Bit 12 Bit n Bit 2 Bit 1 Bit 0 SDO0 tSU(OE) Don’t Care tP1 Figure 11. Data Input Example Timing Diagram Time CLK SDI LD OUTN0 OUTN1 OUTN2 3 4 5 6 7 8 9 10 11 12 13 14 15 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Off On Off On Off On Off On Off On Off On Off On Off On ca OUTN3 OUTN4 OUTN5 ni OUTN6 Off On Off On Off On Off On Off On Off On Off On Off On ch OUTN8 2 D1 D14 D13 D12 D11 D10 OEN OUTN7 1 OUTN9 OUTN10 OUTN11 Te OUTN12 OUTN13 OUTN14 OUTN15 www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 10 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Figure 12. Switching Global Error Mode Timing Diagram tTESTING OEN tGSW(ERROR) tGSW(ERROR) tSU(ERROR) tP(I/O) tP(I/O) al id tP(I/O) tGSW(ERROR) CLK TFLAG(IN) SDI Don’t Care SFLAG(IN) Don’t Care am lc s on A te G nt st il Don’t Care OFLAG(IN) lv LD SDO Acquisition of Error Status tP4 TFLAG OFLAG tSW(ERROR) SFLAG tSW(ERROR) Error-Detection Mode Acquisition of the error status occurs at the rising edge of OEN. Error-detection mode is started on the rising edge of LD when OEN is high. The CLK signal must be low when entering error detection mode. Error detection for open- and shorted-LEDs can only be performed for LEDs that are switched on during test time. To switch between error-detection modes clock pulses are needed (see Table 5). Note: To test all LEDs, a test pattern that turns on all LEDs must be input to the AS1113. Global Error Mode Global error mode is entered when error-detection mode is started. Clock pulses during this period are used to select between temperature, open-LED, and shorted-LED tests, as well as low-current diagnostic mode and shutdown mode (see Table 5). In global error mode, an error flag (TFLAG, OFLAG, SFLAG) is delivered to pin SDO if any errors are encountered. ca Table 5. Global Error Mode Selections Clock Pulses Output Port Don't Care 1 Enabled Over-Temperature Detection ni 0 Error-Detection Mode ch Open-LED Detection Enabled Shorted-LED Detection 3 Don't Care Low-Current Diagnostic Mode Te 2 4 Don't Care Shutdown Mode Global Error Flag/Shutdown Condition TFLAG = SDO = 1: No over-temperature warning. TFLAG = SDO = 0: Over-temperature warning. OFLAG = SDO = 1: No open-LED error. OFLAG = SDO = 0: Open-LED error. SFLAG = SDO = 1: No shorted-LED error. SFLAG = SDO = 0: Shorted-LED error. SDI = 1: Wakeup SDI = 0: Shutdown Note: For a valid result SDI must be 1 for the first device. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 11 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n If there are multiple AS1113s in a chain, the error flag will be gated through all devices. To get a valid result at the end of the chain, a logic 1 must be applied to the SDI input of the first device of the chain. If one device produces an error this error will show up after n*tP(I/O) + tSW(ERROR) at pin SDO of the last device in the chain. This means it is not possible to identify which device in the chain produced the error. Therefore, if a global error occurs, the detailed error report can be run to identify which AS1113, or LED produced the error. Note: When no error has occurred, the detailed error report can be skipped, setting LD and subsequently OEN low. al id Error Detection Functions Open-LED Detection The AS1113 open-LED detection is based on the comparison between VDS and VTHL. The open LED status is aquired at the rising edge of OEN and stored internally. While detecting open-LEDs the output port must be turned on. Open LED detection can be started with 1 clock pulse during error detection mode while the output port is turned on. Table 6. Open LED Detection Modes On On Shorted-LED Effective Output Point Conditions VDS < VTHL VDS > VTHL Detected Open-LED Error Status Code 0 1 am lc s on A te G nt st il Output Port State lv Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error report. Meaning Open Circuit Normal The AS1113 shorted-LED detection is based on the comparison between VDS and VTHH. The shortened LED status is aquired at the rising edge of OEN and stored internally. While detecting shorted-LEDs the output port must be turned on. Shorted-LED detection can be started with 2 clock pulses during error detection mode while the output port is turned on. For valid results, the voltage at OUTN0:OUTN15 must be lower then VTHH under low-current diagnostic mode operating conditions. This can be achieved by reducing the VLED voltage or by adding additional diodes, resistors or LED’s. Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error report. Table 7. Shorted LED Detection Modes On On Overtemperature Effective Output Point Conditions VDS > VTHH VDS < VTHH ca Output Port State Detected Shorted-LED Error Status Code 0 1 Meaning Short Circuit Normal ni Thermal protection for the AS1113 is provided by continuously monitoring the device’s core temperature. The overtemperature status is aquired at the rising edge of OEN and stored internally. Table 8. Overtemperature Modes Effective Output Point Conditions Detected Overtemperature Status Code Meaning Don’t Care Temperature > TOV1 0 Don’t Care Temperature < TOV1 1 Overtemperature Condition Normal Te ch Output Port State www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 12 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Detailed Error Reports The detailed error report can be read out after global error mode has been run. At the falling edge of LD, the detailed error report of the selected test is latched into the shift register and can be clocked out with n*16 clock cycles (n is the number of AS1113s in a chain) via pin SDO. At the same time new data can be written into the shift register, which is loaded on the next rising edge of pin LD. This pattern is shown at the output drivers, at the falling edge of OEN. Detailed Temperature Warning Report al id The detailed temperature warning report can be read out immediately after global error mode has been run. SDI must be 1 for the first device. Bit0 of the 16bit data word represents the temperature flag of the chip. Figure 13. Detailed Temperature Warning Report Timing Diagram Detailed Error Report Readout lv Global Flag Readout OEN tH(L) tGSW(ERROR) am lc s on A te G nt st il LD t(SU)ERROR CLK tP4 DBit15 SDI DBit14 DBit13 DBit12 DBitn DBit2 DBit1 DBit0 Don’t Care New Data Input TFLAG SDO tP4 Undefined Temperature Error Report Output TBit0 Don’t Care tP1 For detailed timing information see Timing Diagrams on page 9. Detailed Temperature Warning Report Example Consider a case where four AS1113s are cascaded in one chain. The detailed error report lists the temperatures for each device in the chain: IC1:[70°] IC2:[85°] IC3:[170°] IC4:[60°] In this case, IC3 is overheated and will generate a global error, and therefore 4*16 clock cycles are needed to write out the detailed temperature warning report, and optionally read in new data. The detailed temperature warning report would look like this: ca XXXXXXXXXXXXXXX1 XXXXXXXXXXXXXXX1 XXXXXXXXXXXXXXX0 XXXXXXXXXXXXXXX1 The 0 in the detailed temperature warning report indicates that IC3 is the device with the over-temperature condition. Te ch ni Note: In an actual report there are no spaces in the output. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 13 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Detailed Open-LED Error Report The detailed open-LED error report can be read out immediately after global error mode has been run. SDI must be 1 for the first device. Figure 14. Detailed Open-LED Error Report Timing Diagram Global Flag Readout Detailed Error Report Readout tTESTING LD al id OEN tH(L) tSU(ERROR) tGSW(ERROR) tGSW(ERROR) CLK tSW(ERROR) DBit14 DBit13 DBit12 DBitn DBit2 DBit1 Don’t Care DBit0 New Data Input TFlag SDO DBit15 am lc s on A te G nt st il SDI Acquisition of Error Status tGSW(ERROR) lv tP4 OFlag tP4 OBit15 OBit14 OBit13 OBit12 OBitn OBit2 Open Error Report Output OBit1 OBit0 Don’t Care tP1 For detailed timing information see Timing Diagrams on page 9. Detailed Open-LED Error Report Example Consider a case where three AS1113s are cascaded in one chain. A 1 indicates a LED is on, a 0 indicates a LED is off, and an X indicates an open LED. The open-LED test is only applied to LEDs that are turned on. This test is used with a test pattern where all LEDs are on at test time. IC1:[1111111111111111] IC2:[111XX11111111X11] IC3:[1111111111111111] IC2 has three open LEDs switched on due to input. 3*16 clock cycles are needed to write the entire error code out. The detailed error report would look like this: 1111111111111111 1111111111111111 LED Status: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 XX1 1 1 1 1 1 1 1 X1 1 1111111111111111 Failure Code: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1110011111111011 1111111111111111 ca Input Data: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Comparing this report with the input data indicates that IC2 is the device with two open LEDs at position 4 and 5 and one open LED at position 14. For such a test it is recommended to enter low-current diagnostic mode first (see LowCurrent Diagnostic Mode on page 15) to reduce screen flickering. ni This test can be used also on-the-fly without using an all 1s test pattern (see Figure 18 on page 17). Te ch Note: In an actual report there are no spaces in the output. LEDs turned off during test time cannot be tested and will show a logic 1 in the detailed error report. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 14 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n Detailed Shorted-LED Error Report The detailed shorted-LED error report can be read out immediately after global error mode has been run (see Global Error Mode on page 11). SDI must be 1 for the first device. Figure 15. Detailed Shorted-LED Error Report Timing Diagram Global Flag Readout Detailed Error Report Readout al id OEN LD tSU(ERROR) tH(L) tGSW(ERROR) tP4 tGSW(ERROR) CLK SDI DBit15 tSW(ERROR) TTFLAG FLAG OFLAG SDO DBit14 DBit13 DBit12 DBitn DBit2 DBit1 Don’t Care DBit0 am lc s on A te G nt st il Acquisition of Error Status tGSW(ERROR) lv tTESTING SFLAG tP4 New Data Input SBit15 SBit14 SBit13 SBit12 SBitn SBit2 Shorted-LED Error Report Output SBit1 SBit0 Don’t Care tP1 For detailed timing information see Timing Diagrams on page 9. Detailed Shorted-LED Error Report Example Consider a case where three AS1113s are cascaded in one chain. A 1 indicates a LED is on, a 0 indicates a LED is off, and an X indicates a shorted LED. This test is used on-the-fly. IC1:[11111XX111111111] IC2:[1111111111111111] IC3:[X100011111111111] IC1 has two shorted LEDs which are switched on, IC3 has one shorted LED switched off due to input. 3*16 clock cycles are needed to write the entire error code out. The detailed error report would look like this: 1111111111111111 0100011111111111 LED Status: 1 1 1 1 1 X X 1 1 1 1 1 1 1 1 1 1111111111111111 X1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Failure Code: 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1111111111111111 1111111111111111 ca Input Data: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ni Showing IC1 as the device with two shorted LEDs at position 6 and 7, and IC3 with one shorted LED at position 1. The shorted LED at position 1 of IC3 cannot be detected, since LEDs turned off at test time are not tested and will show a logic "1" at the detailed error report. To test all LEDs this test should be run with an all 1s test pattern. For a test with an all on test pattern, low-current diagnostic mode should be entered first to reduce on-screen flickering. ch Note: In an actual report there are no spaces in the output. LEDs turned off during test time cannot be tested and will show a logic 1 in the detailed error report. Low-Current Diagnostic Mode Te To run the open- or shorted-LED test, a test pattern must be used that will turn on each LED to be tested. This test pattern will cause a short flicker on the screen while the test is being performed. The low-current diagnostic mode can be initiated prior to running a detailed error report to reduce this on-screen flickering. Note: Normally, displays using such a diagnostic mode require additional cables, resistors, and other components to reduce the current. The AS1113 has this current-reduction capability built-in, thereby minimizing the number of external components required. Low-current diagnostic mode can be initiated via 3 clock pulses during error-detection mode. After the falling edge of LD, a test pattern displaying all 1s can be written to the shift register which will be used for the next error-detection test. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 15 - 24 AS1113 Datasheet - D e t a i l e d D e s c r i p t i o n On the next falling edge of OEN, current is reduced to ILC. With the next rising edge of OEN the current will immediately increase to normal levels and the detailed error report can be read out entering error-detection mode. Figure 16. Switching into Low-Current Diagnostic Mode Timing Diagram Low-Current Diagnosis Mode OEN Load Internal all 1s Test Pattern (optional) tSU(ERROR) LD tGSW(ERROR) tH(L) lv CLK tGSW(ERROR) tSW(ERROR) SDI Re-entering Error Detection Mode (see Figure 14) (see Figure 15) am lc s on A te G nt st il SDO Don’t Care TFLAG OFLAG SFLAG Normal Operation Current tP1 For detailed timing information see Timing Diagrams on page 9. Shutdown Mode al id tTESTING The AS1113 features a shutdown mode which can be entered via 4 clock pulses during error-detection mode. To enable the shutdown mode a 0 must be placed at SDI after the rising edge of the 3rd clock pulse. To disable shutdown mode a 1 must be placed at SDI after the 3rd clock pulse. The shutdown/wakeup information will be latched through if multiple AS1113 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit will be read out and the AS1113 will shutdown or wakeup. Note: In shutdown mode the supply current drops down to <10µA. Figure 17. Shutdown Mode Timing Diagram ca OEN LD ni ch CLK tSU(ERROR) 1 = Wakeup Te SDI SDO 0 = Shutdown 1 = Wakeup TFLAG OFLAG SFLAG 0 = Shutdown tP4 www.austriamicrosystems.com/LED-Driver-ICs/AS1113 tSU(D) Revision 1.04 16 - 24 AS1113 Datasheet - A p p l i c a t i o n I n f o r m a t i o n 9 Application Information Error Detection The AS1113 features two types of error detection. The error detection can be used on-the-fly, for active LEDs, without any delay, or by entering into low-current diagnosis mode. Error Detection On-The-Fly al id Error detection on-the-fly will output the status of active LEDs during operation. Without choosing an error mode this will output the temperature flag at every input/output cycle. Triggering one clock pulse for open or two clock pulses for short detection during error detection mode outputs the detailed open- or short-error report with the next input/output cycle (see Figure 18). LEDs turned off at test time are not tested and will show a logic "1" at the detailed error report. Data1 Display SDI lv Figure 18. Normal Operation with Error Detection During Operation – 64 Cascaded AS1113s Data2 Data2 Data3 Data4 am lc s on A te G nt st il Data3 T/O or S Error Code Data0 SDO T/O or S Error Code Data1 GEF Clock for Error Mode 0x/1x/2x CLK Clock for Error Mode 0x/1x/2x 1024x 1024x 1024x Rising Edge of OEN Acquisition of Error Status OEN T/O or S Error Code Data2 GEF Rising Edge of OEN Acquisition of Error Status Falling Edge of LD; Error Register is copied into Shift Register LD Falling Edge of LD; Error Register is copied into Shift Register ≤ 50mA Current GEF = Global Error Flag Error Detection with Low-Current Diagnosis Mode This unique feature of the AS1113 uses an internal all 1s test pattern for a flicker free diagnosis of all LEDs. This error detection mode can be started at the end of each input cycle (see Figure 19). ca Figure 19. Low-Current Diagnosis Mode with Internal All 1s Test Pattern – 64 Cascaded AS1113s SDI Data1 T/O or S Error Code Data0 ch SDO Data0 ni Display CLK Data2 Data2 Data3 GEF Temperature Error Code 3x Clocks Low- Clock for Error Current Mode Mode 1x/2x 1024x 1024x Rising Edge of OEN Acquisition of Error Status Use Internal All 1s Falling Edge of LD; Error Register is copied into Shift Register Test Pattern LD Current Data1 O or S Error Code from All 1s Test Pattern GEF 1024x Te OEN Low-Current Diagnosis Mode ≤ 50mA ≤ 50mA ≤ 0.8mA www.austriamicrosystems.com/LED-Driver-ICs/AS1113 GEF = Global Error Flag Revision 1.04 17 - 24 AS1113 Datasheet - A p p l i c a t i o n I n f o r m a t i o n The last pattern written into the shift register will be saved before starting low-current diagnosis mode and can be displayed immediately after the test has been performed. Low-current diagnostic mode is started with 3 clock pulses during error detection mode. Then OEN should be enabled for ≥2µs for testing. With the rising edge of OEN the LED test is stopped, and while LD is high the desired error mode can be selected with the corresponding clock pulses. After LD and OEN go low again the previously saved pattern can be displayed at the outputs. al id With the next data input the detailed error code will be clocked out at pin SDO. Note: See Figure 20 for use of an external test pattern. Figure 20. Low-Current Diagnosis Mode with External Test Pattern – 64 Cascaded AS1113s Low-Current Diagnosis Mode Display Data2 Data2 External all 1s Test Pattern T/O or S Error Code Data0 Data3 O or S Error Code from Test Pattern GEF GEF Temperature Error Code am lc s on A te G nt st il SDO lv SDI Data1 CLK 3x Clocks Low-Current Mode Clock for Error Mode 1x/2x 1024x 1024x 1024x Rising Edge of OEN Acquisition of Error Status OEN Falling Edge of LD; Error Register is copied into Shift Register LD Current ≤ 50mA ≤ 50mA ≤ 0.8mA GEF = Global Error Flag Cascading Devices To cascade multiple AS1113 devices, pin SDO must be connected to pin SDI of the next AS1113 (see Figure 21). At each rising edge of CLK the LSB of the shift register will be written into the shift register SDI of the next AS1113 in the chain. ca Note: When n*AS1113 devices are in one chain, n*16 clock pulses are needed to latch-in the input data. ch SDI ni Figure 21. Cascading AS1113 Devices Te SDI AS1113 #1 CLK LD SDO SDI OEN AS1113 #2 CLK LD SDO OEN SDI AS1113 #n-1 CLK LD SDO OEN CLK LD OEN www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 18 - 24 AS1113 Datasheet - A p p l i c a t i o n I n f o r m a t i o n Constant Current In LED display applications, the AS1113 provides virtually no current variations from channel-to-channel and from AS1113-to-AS1113. This is mostly due to 2 factors: While IOUT ≥ 10mA, the maximum current skew is less than ±3% between channels and less than ±6% between AS1113 devices. ! In the saturation region, the characteristic curve of the output stage is flat (see Figure 5 on page 7). Thus, the output current can be kept constant regardless of the variations of LED forward voltages (VF). al id ! Adjusting Output Current The AS1113 scales up the reference current (IREF) set by external resistor (REXT) to sink a current (IOUT) at each output port. As shown in Figure 3 on page 7 the output current in the saturation region is extremely flat so that it is possible to define it as target current (IOUT TARGET). IOUT TARGET can be calculated by: am lc s on A te G nt st il Where: REXT is the resistance of the external resistor connected to pin REXT. VREXT is the voltage on pin REXT. (EQ 1) (EQ 2) (EQ 3) lv VREXT = 1.253V IREF = VREXT/REXT (if the other end of REXT is connected to ground) IOUT TARGET = IREF*15 = (1.253V/REXT)*15 The magnitude of current (as a function of REXT) is around 50.52mA at 372Ω and 25.26mA at 744Ω. Figure 3 on page 7 shows the relationship curve between the IOUT TARGET of each channel and the corresponding external resistor (REXT). Package Power Dissipation The maximum allowable package power dissipation (PD) is determined as: PD(MAX) = (TJ-TAMB)/RTH(J-A) When 16 output channels are turned on simultaneously, the actual package power dissipation is: PD(ACT) = (IDD*VDD) + (IOUT*Duty*VDS*16) (EQ 4) (EQ 5) Therefore, to keep PD(ACT) ≤ PD(MAX), the maximum allowed output current as a function of duty cycle is: IOUT = {[(TJ-TAMB)/RTH(J-A)]-(IDD*VDD)}/VDS/Duty/16 Where: TJ = 150ºC Delayed Outputs (EQ 6) ca The AS1113 has graduated delay circuits between outputs. These delay circuits can be found between OUTNn and constant current block. ni The fixed delay time is 20 ns (typ) where OUTN0 has no delay, OUTN1 has 20ns delay, OUTN2 has 40ns delay ... OUTN15 has 300ns delay. This delay prevents large inrush currents, which reduce power supply bypass capacitor requirements when the outputs turn on (see Figure 10 on page 10) ch Switching-Noise Reduction LED drivers are frequently used in switch-mode applications which normally exhibit switching noise due to parasitic inductance on the PCB. Te Load Supply Voltage Considering the package power dissipation limits (see EQ 4:6), the AS1113 should be operated within the range of VDS = 0.4 to 1.0V. For example, if VLED is higher than 5V, VDS may be so high that PD(ACT) > PD(MAX) where VDS = VLED - VF. In this case, the lowest possible supply voltage or a voltage reducer (VDROP) should be used. The voltage reducer allows VDS = (VLED -VF) - VDROP. Note: Resistors or zener diodes can be used as a voltage reducer as shown in Figure 22. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 19 - 24 AS1113 Datasheet - A p p l i c a t i o n I n f o r m a t i o n Figure 22. Voltage Reducer using Resistor (Left) and Zener Diode (Right) Voltage Supply Voltage Supply } VLED VDROP VDROP { VF VF VLED VDS AS1113 Te ch ni ca am lc s on A te G nt st il lv AS1113 al id VDS www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 20 - 24 AS1113 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 10 Package Drawings and Markings The AS1113 is available in a 28-pin QFN (5x5mm) package and a 24-pin SSOP package. -A- Figure 23. 28-pin QFN (5x5mm) Packagee D2 D2/2 D/2 al id -B- E e E2/2 NXL E/2 4 2 1 N N-1 NXb 5 INDEX AREA (D/2 xE/2) TOP VIEW 6 SEE DETAIL B 4 -A- am lc s on A te G nt st il aaa C 2x bbb ddd C A B C BTM VIEW 5 Max 0.80 0.05 0.65 0.15 0.15 0.10 0.10 0.05 0.08 0.10 Notes 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 Symbol D BSC E BSC D2 E2 K b e N ND NE Min 3.00 3.00 0.20 0.18 Typ 5.00 5.00 3.15 3.15 0.25 0.50 28 7 7 Max 3.25 3.25 0.30 Notes 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2, 5 1, 2 1, 2, 5 1, 2, 5 ch ni ca 0.45 0.03 Typ 0.75 0.02 0.20 REF 0.55 A3 Terminal Tip ODD TERMINAL SIDE Min 0.70 0.00 SEATING PLANE -C- SIDE VIEW A1 e 0.08 C A L1 ccc C NX Symbol A A1 A3 L L1 aaa bbb ccc ddd eee ggg lv aaa C 2x -B- SEE DETAIL B Datum A or B E2 D INDEX AREA (D/2 xE/2) Notes:Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals. Dimensioning and tolerancing conform to ASME Y14.5M-1994. All dimensions are in millimeters; angles in degrees. N is the total number of terminals. The terminal #1 identifier and terminal numbering convention shall conform to JEDEC 95 SPP-012. Details of terminal #1 identifier are optional but must be located within the zone indicated. The terminal #1 identifier may be either a mold or marked feature. 5. Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip. If one end of the terminal has the optional radius, the b dimension should not be measured in that radius area. 6. Dimensions ND and NE refer to the number of terminals on each D and E side, respectively. Te 1. 2. 3. 4. www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 21 - 24 AS1113 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s ca Min Max 1.35 1.75 0.10 0.25 1.37 1.57 0.20 0.30 0.19 0.25 8.55 8.74 5.79 6.20 3.81 3.99 0.635 BSC 0.22 0.49 0.40 1.27 0º 8º Te ch ni Symbol A A1 A2 b C D E E1 e h L θ am lc s on A te G nt st il lv al id Figure 24. 24-pin SSOP Package www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 22 - 24 AS1113 Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The device is available as the standard products shown in Table 9. Table 9. Ordering Information Description Delivery Form Package AS1113-BSSU 50mA, 16-Channel LED Driver with Diagnostics Tubes 24-pin SSOP AS1113-BSST 50mA, 16-Channel LED Driver with Diagnostics Tape and Reel 24-pin SSOP AS1113-BQFR 50mA, 16-Channel LED Driver with Diagnostics Tray 28-pin QFN (5x5mm) AS1113-BQFT 50mA, 16-Channel LED Driver with Diagnostics Tape and Reel 28-pin QFN (5x5mm) al id Ordering Code lv Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect Te ch ni ca am lc s on A te G nt st il For further information and requests, please contact us mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 23 - 24 AS1113 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. al id Disclaimer am lc s on A te G nt st il lv Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. ni ca The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. ch Contact Information Headquarters Te austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/LED-Driver-ICs/AS1113 Revision 1.04 24 - 24