AS1109-BSOU austriamicrosystems, AS1109-BSOU Datasheet
AS1109-BSOU
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AS1109-BSOU Summary of contents
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... Datasheet A S 110 General Description The AS1109 is designed to drive LEDs through a fast serial interface and features 8 output constant current drivers and an on- chip diagnostic read-back function. The high clock-frequency (up to 50MHz), adjustable output current, and flexible serial interface makes the device perfectly suited for high-volume transmission applications ...
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... Application Information .......................................................................................................................................................... 17 Error Detection ......................................................................................................................................................................................... 17 Error Detection On-The-Fly ................................................................................................................................................................ 17 Error Detection with Low-Current Diagnosis Mode ............................................................................................................................. 17 Cascading Devices .................................................................................................................................................................................. 18 Constant Current ...................................................................................................................................................................................... 19 Adjusting Output Current .......................................................................................................................................................................... 19 Package Power Dissipation ..................................................................................................................................................................... 19 Delayed Outputs ...................................................................................................................................................................................... 19 Switching-Noise Reduction ...................................................................................................................................................................... 19 Load Supply Voltage ................................................................................................................................................................................ 19 10 Package Drawings and Markings ........................................................................................................................................ 21 11 Ordering Information ............................................................................................................................................................ 25 www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Revision 1. ...
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... Serial Data Input Serial Data Clock. The rising edge of the CLK signal is used to clock data into and at the falling edge out of the AS1109 shift register. In error mode, the rising edge of the CLK signal is used to switch error modes. Serial Data Load. Data is transferred to the data register at the rising edge of this pin. ...
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... Input Current (latch-up immunity) Electrostatic Discharge Electrostatic Discharge HBM Temperature Ranges and Storage Conditions Thermal Resistance Θ JA Storage Temperature Range Package Body Temperature Humidity non-condensing Moisture Sensitive Level * Min/max values are load dependent. www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Section 6 Electrical Characteristics on page 5 Min Max Units -0 -0 0.4 ...
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... R Pulldown Resistance IN(DOWN) * Open Error Detection Threshold Voltage V THL * Short Error Detection Threshold Voltage V THH T Overtemperature Threshold Flag OV1 www.austriamicrosystems.com/LED-Driver-ICs/AS1109 = 5V 25°C (unless otherwise specified). DD AMB Condition Device fully functional up to 125°C OUTN0:7 OUTN0: (see Figure 8) DD SDO SDO CLK, OEN, LD, SDI OEN = ...
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... External Resistor Reaction Time t REXT2,1 External Resistor Reaction Time t REXT2 multiple AS1109 devices are cascaded and t caded LED drivers. Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Condition R = Open‚ ...
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... REXT = 372Ω; VDS = 0.6V 0.5 REXT = 186Ω; VDS = 0.8V 0 REXT = 744Ω; -0.5 VDS = 0.5V -1 -50 - Temperature (°C) www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Figure 4. Relative Output Current Error vs. V Iout/Iout@VDD = 1.5 1 0.5 REXT = 744Ω; VDS = 0.5V 0 -0.5 REXT = 372Ω; VDS = 0.6V -1 -1.5 -2 ...
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... The AS1109 contains an 8-bit shift register and an 8-bit data register, which convert serial input data into parallel output format. At AS1109 output stages, eight 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 ...
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... This section contains timing diagrams referenced in other sections of this data sheet. Figure 10. Normal Mode Timing Diagram t W(CLK) CLK 50 SU(D) H(D) SDI 50% SDO LD t SU(L) OEN OUTNx Figure 11. Output Delay Timing Diagram OEN OUTN0 OUTN1 OUTN7 www.austriamicrosystems.com/LED-Driver-ICs/AS1109 50% 50% 50% 50 W(L) 50% 50% t H(L) OEN Low = Output Enabled 50 W(OE) 50 90% ...
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... Figure 13. Data Input Example Timing Diagram Time = CLK SDI OEN OUTN0 OUTN1 OUTN2 OUTN3 OUTN4 OUTN5 OUTN6 OUTN7 www.austriamicrosystems.com/LED-Driver-ICs/AS1109 8 CLK Pulses t SU(D) Data Bit Data Bit Data Bit Data Bit Data Bit Old Data Old Data Old Data Old Data Old Data ...
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... Note: For a valid result SDI must be 1 for the first device. If there are multiple AS1109s 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*t pin SDO of the last device in the chain ...
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... Output Port State Point Conditions Overtemperature Thermal protection for the AS1109 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 Output Port State Point Conditions Don’t Care Temperature > ...
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... The detailed error report can be read out after global error mode has been run. On 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*8 clock cycles (n is the number of AS1109s in a chain) via pin SDO. At the same time new data can be written into the shift register, which will load on the next rising edge of pin LD ...
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... Detailed Open-LED Error Report Example Consider a case where five AS1109s are cascaded in one chain indicates a LED is on 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. ...
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... Detailed Shorted-LED Error Report Example Consider a case where five AS1109s are cascaded in one chain indicates a LED is on indicates a LED is off, and an X indicates a shorted LED. This test is used with a test pattern where all LEDs are on at test time. Additionally, this test should be run after starting low-current ...
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... 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 mul- tiple AS1109 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit will be read out and the AS1109 will shutdown or wakeup. Note: In shutdown mode the supply current drops down to typically 3µ ...
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... Current Error Detection with Low-Current Diagnosis Mode This unique feature of the AS1109 uses an internal all 1s test pattern for a flicker free diagnosis of all LEDs. This error detection mode can be started anytime, and does not require any SDI input Figure 21. Low-Current Diagnosis Mode with Internal All 1s Test Pattern – 128 Cascaded AS1109s ...
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... To cascade multiple AS1109 devices, pin SDO must be connected to pin SDI of the next AS1109 LSB of the shift register will be written into the shift register SDI of the next AS1109 in the chain. Data at the SDI pin is clocked in at the rising edge of the CLK pulse and is clocked out at the SDO pin 8.5 clock cycles later at the falling edge of the CLK pulse. ...
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... Delayed Outputs The AS1109 has graduated delay circuits between outputs. These delay circuits can be found between OUTNn and constant current block. The fixed delay time (typ) where OUTN0 has no delay, OUTN1 has 20ns delay, OUTN2 has 40ns delay ... OUTN7 has 140ns delay. This ...
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... AS1109 Datasheet - Figure 24. Voltage Reducer using Resistor (Left) and Zener Diode (Right) Voltage Supply } V DROP V LED AS1109 www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Voltage Supply { V DROP AS1109 Revision 1.20 V LED ...
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... AS1109 Datasheet - Package Drawings and Markings Figure 25. AS1109 Markings 16-pin SOIC-150 Table 9. Packaging Code YYWWRZZ YY last two digits of the current year www.austriamicrosystems.com/LED-Driver-ICs/AS1109 16-pin QSOP-150 manufacturing week plant identifier Revision 1.20 16-pin QFN 4x4mm ZZ free choice / traceability code ...
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... AS1109 Datasheet - Figure 26. 16-pin SOIC-150 Package www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Revision 1. ...
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... AS1109 Datasheet - Figure 27. 16-pin QSOP-150 Package www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Revision 1. ...
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... AS1109 Datasheet - Figure 28. 16-pin QFN 4x4mm Packages www.austriamicrosystems.com/LED-Driver-ICs/AS1109 Revision 1. ...
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... AS1109 Datasheet - Ordering Information The device is available as the standard products shown in Table 10. Ordering Information Ordering Code Marking AS1109-BSOU AS1109B Constant-Current, 8-Bit LED Driver with Diagnostics AS1109-BSOT AS1109B Constant-Current, 8-Bit LED Driver with Diagnostics AS1109-BSSU AS1109B Constant-Current, 8-Bit LED Driver with Diagnostics ...
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... No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters 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/AS1109 Revision 1. ...