AS1112-BQFT austriamicrosystems, AS1112-BQFT Datasheet
AS1112-BQFT
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AS1112-BQFT Summary of contents
Page 1
... Table 1. Standard Products Model Power-Down AS1112 Yes AS1112B No AS1112C No An 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. AS1112 - Block Diagram 26 Max OUTn V = REF Current 1.24V I REF 24 Greyscale ...
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... Normal operation. 23 SDO Serial Data Output Greyscale Clock. Reference clock for greyscale PWM control 24 GSCLK TEST Test Pin. This pin must be connected to GND (AS1112) to ensure normal operation. 25 Test Pin. This pin must be connected to V XTEST Reference Current Terminal 26 IREF Power Supply Voltage ...
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... Storage Temperature Range Package Body Temperature Humidity non-condensing Moisture Sensitive Level 1. Depending on actual PCB layout and PCB used derating factor changes the total continuous power dissipation (P DERATE T =85ºC calculate P at 85º DERATE www.austriamicrosystems.com/LED-Driver-ICs/AS1112 Recommended Operating Conditions on page 4 Min Max Units - ...
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... Hold Time 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/LED-Driver-ICs/AS1112 Conditions SDO SDO, XERR CC OUT0:OUT15 = -40 to 85°C (unless otherwise noted) AMB Conditions CLK GSCLK 1 CLK = 1/0 2 GSCLK = 1 OEN = 1 3 SDI, CLK ...
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... GND; pin MODE All outputs off 10kΩ IREF All outputs off 1.3kΩ IREF All outputs on 1.3kΩ IREF All outputs on 640Ω IREF only AS1112 All outputs on 2V, OUT R = 640Ω IREF All outputs off 15V, OUT R = 640Ω, OUT0:OUT15 IREF 640Ω ...
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... Figure 12 on page 13. 2. See Figure 14 on page 14. 3. Only for AS1112 and AS1112B. 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/AS1112 = 25° (unless otherwise specified). ...
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... Iout = 80mA (480Ω Iout = 60mA (640Ω Iout = 40mA (1kΩ Iout = 15mA (2.7kΩ (V) DS Figure 5. Output Current vs EXT 100 REXT (kOhm) www.austriamicrosystems.com/LED-Driver-ICs/AS1112 Figure 4. Output Current vs. V 120 110 100 0.5 Figure 6. Output Current vs. Dot Correction Value Dot Correction Value Revision 1.09 ...
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... Multiple AS1112 devices can be cascaded by connecting the SDO pin of one device with pin SDI of the next device The SDO pin can also be connected to the microcontroller to receive status information from the AS1112. The serial data format is 96-bit or 192- bit wide, depending on mode of the device (see LD on page Figure 7 ...
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... Open LED Detection The AS1112 integrated open LED detection circuit reports an error if any of the 16 LEDs is open or disconnected from the circuit. The open LED detection circuit trips when the error detection is activated Note: The voltage at each OUTn is sampled 1µs after being switched on. Please refer to The open LED detection circuit also pulls XERR to GND when tripped ...
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... GND, the greyscale registers are updated. If the pin MODE is tied to V Delay Between Outputs (only for AS1112 and AS1112B) The AS1112 uses graduated delay circuits between OUTn outputs. These circuits are contained in the constant-current driver block of the AS1112 (see Figure 1 on page 1) ...
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... AS1112 Datasheet - Power Dissipation To ensure proper operation of the device, the total power dissipation of the AS1112 must be below the power dissipation rating of the device package. Total power dissipation is calculated as Where the device supply voltage the device supply current the device OUTn voltage when driving LED current; ...
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... GS14.11 GS OUT15 When pin MODE is tied to GND, the AS1112 enters greyscale data input mode. The device switches the input shift register to 192-bit width. After all data is clocked in, the rising edge of the LD signal latches the data into the greyscale register All greyscale data in the input shift register is replaced with status information data (SID) after latching into the greyscale register. ...
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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 ...
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... AS1112 Datasheet - 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/LED-Driver-ICs/AS1112 Greyscale PWM Cycle n t WL1 t WH1 PD3 PD3 PD2 Revision 1.09 Greyscale PWM Cycle n SU4 t WH3 4096 t PD3 ...
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... GSCLK MODE MODE OEN OEN SOUT Controller The maximum number of cascading AS1112 devices depends on the application system and is in the range of 40 devices. The minimum fre- quency needed can be calculated by the following equations: Where the minimum frequency needed for GSCLK; GSCLK f is the update rate of whole cascaded system ...
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... AS1112 Datasheet - Package Drawings and Markings Figure 16. 32-pin TQFN 5x5 mm Marking Figure 17. Packaging Code YYWWIZZ YY last two digits of the current year www.austriamicrosystems.com/LED-Driver-ICs/AS1112 WW I plant identifier manufacturing week Revision 1.09 ZZ free choice / traceability code ...
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... AS1112 Datasheet - Figure 18. 32-pin TQFN 5x5 mm Package www.austriamicrosystems.com/LED-Driver-ICs/AS1112 Revision 1. ...
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... The device is available as the standard products shown in Table 11. Ordering Information Ordering Code Marking 16-Channel LED Driver with Dot Correction and Greyscale PWM AS1112-BQFT AS1112 with Active-High TEST Input and Power-Down Mode 16-Channel LED Driver with Dot Correction and Greyscale PWM AS1112B-BQFT ...
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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/AS1112 Revision 1. ...