as1112b-bqft austriamicrosystems, as1112b-bqft Datasheet
as1112b-bqft
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as1112b-bqft Summary of contents
Page 1
... The overtemperature flag indicates that the device overtemperature condition. Table 1. Standard Products Model Power-Down TEST pin AS1112 Yes Connect to GND AS1112B No Connect additional power-down pin puts the AS1112 into a 40nA standby-mode. The AS1112 is available in a 32-pin TQFN 5x5 mm package. Figure 1. Block Diagram 1 CLK ...
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... OUT12 OUT3 7 17 OUT11 OUT4 8 Description (see Setting Greyscale Brightness on page : Selects dot correction mode (see Setting Dot Correction on page CC (AS1112B) to ensure normal operation the dot correction register receives new data. CC Revision 1.02 24 GSCLK 23 SDO 22 XERR 21 OUT15 Thermal 20 OUT14 Pad 19 OUT13 ...
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... Output Voltage Range GND OUT0 OUT15 ESD Rating Storage Temperature Range Operating Ambient Temperature Range 32-pin TQFN 5x5 mm Package Thermal Impedance Package Body Temperature www.austriamicrosystems.com may cause permanent damage to the device. These are stress ratings only, Min Max Units 0 ...
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... See Figure 10 on page 12. 2. See Figure 14 on page 14. 3. See Figure 12 on page 13. 4. See Figure 7 on page 8. www.austriamicrosystems.com Conditions Min 3 0 GND SDO SDO, XERR CC OUT0:OUT15 = -40 to 85°C (unless otherwise noted) AMB ...
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... Thermal Warn Flag Threshold TWF LED Short Detection V LSD Threshold LED Open Detection V LOD Threshold V Reference Voltage Output IREF 1. Specified by design. Not tested. www.austriamicrosystems.com = 25° (unless otherwise specified). AMB CC Condition I = -1mA, SDO 1mA, SDO, XERR GND; Pins OEN, TEST, ...
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... PD3 Average Output Delay t D Time 1. See Figure 12 on page 13. 2. See Figure 14 on page 14. Dissipation Ratings Table 8. Dissipation Ratings Package Type 32-pin TQFN 5x5 mm www.austriamicrosystems.com = 25°C, V AMB Conditions SDO OUTn HEX SOUT OUTn HEX 1 CLK, SDO 2 OEN, OUT0 2 ...
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... RIREF = 3.9kΩ (V) DS Figure 5. Output Current vs. R EXT 100 REXT (kOhm) www.austriamicrosystems.com Figure 4. Output Current vs 0.5 Figure 6. Output Current vs. Dot Correction Value ...
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... Figure 15 on page error. To differentiate the overtemperature flag from the open LED detect flag from pin XERR, the open LED detect flag can be masked out by setting OEN = 1 (see Table www.austriamicrosystems.com Greyscale Mode Data Input Cycle ...
Page 9
... OUTn is higher than V Note: The voltage at each OUTn is sampled 1µs after being switched on. Please refer to The shorted LED status of each channel can only be read out from the AS1112 status information data (SID) during a greyscale data input cycle. www.austriamicrosystems.com Error Information Thermal Short ...
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... V = 1.24V; IREF R = User-selected external resistor. IREF Figure 5 on page 7 shows the maximum output current I between I terminal to GND, and I REF OUT www.austriamicrosystems.com , DC=3F ) HEX HEX >1µs LODn, LSDn Error Detection Start 1). The average-delay time is 30ns (typ). (1.24V typ). The maximum channel current is IREF multiplied by a factor of 31 ...
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... Dot correction data are simultaneously entered for all channels. The complete dot correction data format consists 6-bit words, which forms a 96-bit serial data packet is clocked in with the MSB first. Figure 9. Dot Correction Data Packet Format MSB DC15.5 ... DC15.0 DC14.5 DC OUT15 www.austriamicrosystems.com DCn OUT MAX 63 ; ...
Page 12
... After all data is clocked in, the rising edge of the LD signal latches the data into the greyscale reg- ister (see Figure 12). All greyscale data in the input shift register is replaced with status information data (SID) after latching into the grey- scale register. www.austriamicrosystems.com DCn DCn DCn MSB-2 LSB+1 ...
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... The AS1112 compares the greyscale value of each OUTn channel with the greyscale counter value. All OUTn whose greyscale values equal the counter values are switched off. A OEN = 1 signal after 4096 GSCLK pulses resets the greyscale counter to zero and completes a greyscale PWM cycle www.austriamicrosystems.com 1st Greyscale Mode SU3 ...
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... Data Sheet - Figure 14. Greyscale PWM Cycle Timing Diagram OEN GSCLK t PD1 OUT0 Current t PD1 OUT1 Current PD1 D OUT15 Current XERR www.austriamicrosystems.com Greyscale PWM Cycle n t WL1 t WH1 PD3 PD3 ...
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... UPDATE Where the minimum frequency needed for CLK and SIN; CLK f is the update rate of whole cascaded system; UPDATE n is the number of cascaded of AS1112 devices. www.austriamicrosystems.com V LED ... OUT0 OUT15 ... SDO SDI V CC XERR ...
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... Dimension b applies to metallized terminal and is measured between 0.25mm and 0.30mm from the terminal tip. Dimension L1 represents terminal full back from package edge up to 0.1mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal 5. Radius on terminal is optional. www.austriamicrosystems.com Symbol Min Nom Max 0 ...
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... Table 12. Ordering Information Model AS1112-BQFT 16-Channel LED Driver with Dot Correction and Greyscale PWM with Active-High TEST Input and Power-Down Mode AS1112B-BQFT 16-Channel LED Driver with Dot Correction and Greyscale PWM with Active-Low XTEST Input and without Power-Down Mode www.austriamicrosystems.com Table 12 ...
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... 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 ...