AS1113BQFT austriamicrosystems, AS1113BQFT Datasheet

IC, LED DRIVER, CONSTANT CURRENT, QFN-28

AS1113BQFT

Manufacturer Part Number
AS1113BQFT
Description
IC, LED DRIVER, CONSTANT CURRENT, QFN-28
Manufacturer
austriamicrosystems
Datasheet

Specifications of AS1113BQFT

Led Driver Application
Fixed Or Slow-Rolling Displays, LED Matrix Displays
No. Of Outputs
16
Output Current
50mA
Output Voltage
15V
Input Voltage
3V To 5.5V
Topology
Constant Current
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
AS1113
50mA, 16-Channel LED Driv e r w i t h D i a g n o s t i c s
1 General Description
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.
The high clock-frequency (up to 50MHz), adjustable out-
put current, and flexible serial interface makes the
device perfectly suited for high-volume transmission
applications.
Output current is adjustable (up to 50mA/channel) using
an external resistor (R
The serial interface with Schmitt trigger inputs includes
an integrated shift register. Additionally, an internal data
register stores the currently displayed data.
The device features integrated diagnostics for over-
temperature, open-LED, and shorted-LED conditions.
Integrated registers store global fault status information
during load as well as the detailed temperature/open-
LED/shorted-LED diagnostics results.
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 28-
pin QFN (5x5mm) package.
If a higher output current is needed, please see the
AS1110 with 100mA drive capability.
Figure 1. Main Diagram and Pin Assignments
www.austriamicrosystems.com
+V
SDI
LED
CLK
EXT
).
LD
OEN
AS1113
Revision 1.02
2 Key Features
3 Applications
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 pan-
els, emergency light indicators, and traffic signs.
REXT
!
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- Between Channels: <±3%
- Between Devices: <±6%
16 Constant-Current Output Channels
Excellent Output Current Accuracy
Output Current Per Channel: 0.5 to 50mA
Controlled In-Rush Current
Over-Temperature, Open-LED, Shorted-LED
Diagnostic Functions
Low-Current Test Mode
Global Fault Monitoring
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
GND
V
DD
D a t a S h e e t
SDO
1 - 24

Related parts for AS1113BQFT

AS1113BQFT Summary of contents

Page 1

... QFN (5x5mm) package higher output current is needed, please see the AS1110 with 100mA drive capability. Figure 1. Main Diagram and Pin Assignments +V LED SDI CLK LD www.austriamicrosystems.com 2 Key Features ! 16 Constant-Current Output Channels ! Excellent Output Current Accuracy - Between Channels: <±3% - Between Devices: <±6% ! Output Current Per Channel: 0 ...

Page 2

... Shutdown Mode .................................................................................................................................................... 16 9 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 ........................................................................................................................... 23 www.austriamicrosystems.com Revision 1. ...

Page 3

... CLK 3:10 5:20 OUTN0:15 12: OEN 22 21 SDO 23 22 REXT N/C www.austriamicrosystems.com 22 SDO 21 OEN OUTN15 19 OUTN14 18 OUTN13 17 OUTN12 16 OUTN11 Description Ground Serial Data Input 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 ...

Page 4

... Output Voltage GND Pin Current Thermal Resistance Θ JA Ambient Temperature Storage Temperature Humidity Digital Outputs Electrostatic Discharge All Other Pins Latch-Up Immunity Package Body Temperature www.austriamicrosystems.com may cause permanent damage to the device. These are stress ratings only, Min Max Units -0.4 V +0.4 -0 ...

Page 5

... Pulldown Resistance IN(DOWN) V Error Detection Threshold Voltage THL V Error Detection Threshold Voltage THH T Overtemperature Threshold Flag OV1 I DD(OFF)0 I Off DD(OFF)1 Supply I DD(OFF)2 Current I DD(ON DD(ON)2 www.austriamicrosystems.com Condition OUTN0:15 OUTN0:15 SDO SDO 0.7 x CLK, OEN, LD, SDI OEN = 15. +1.0mA -1.0mA OH 0. 0.5V Const 744Ω ...

Page 6

... Low-Current Test Mode P3,ON Propagation Delay Time t P3,OFF External Resistor Reaction Time t REXT2,1 External Resistor Reaction Time t REXT2 multiple AS1113 devices are cascaded and t transfer between two cascaded LED drivers. www.austriamicrosystems.com , V = GND 372Ω 4.0V EXT LOAD = 5V DD Conditions CLK - SDO LD - OUTNn ...

Page 7

... AMB 60 50 REXT = 376Ω 40 REXT = 470Ω 30 REXT = 627Ω 20 REXT = 940Ω (V) DS www.austriamicrosystems.com 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. 3.5 10000 Figure 6. Output Current vs. V ...

Page 8

... Figure 7. Block Diagram +V LED REXT Current Generators OEN LD 16-Bit Data Register CLK 16-Bit Shift Register SDI Indicates 16 Bit Path www.austriamicrosystems.com (see page 15). 16-Bit Open 16-Bit Short Temperature Detection & Detection & Detection Error Register Error Register Detailed Error Detection Control Logic Revision 1 ...

Page 9

... This section contains timing diagrams referenced in other sections of this data sheet. Figure 8. Normal Mode Timing Diagram t W(CLK) 50% CLK t t SU(D) H(D) SDI 50% SDO LD OEN OUTNx Figure 9. Output Delay Timing Diagram OEN OUTN0 OUTN1 OUTN15 www.austriamicrosystems.com 50% 50% 50% 50 W(L) 50% 50 SU(L) H(L) OEN Low = Output Enabled 50 W(OE) ...

Page 10

... LD OEN OUTN0 OUTN1 OUTN2 OUTN3 OUTN4 OUTN5 OUTN6 OUTN7 OUTN8 OUTN9 OUTN10 OUTN11 OUTN12 OUTN13 OUTN14 OUTN15 www.austriamicrosystems.com 16 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 ...

Page 11

... Don't Care Detection 1 Enabled Open-LED Detection 2 Enabled Shorted-LED Detection Low-Current Diagnostic 3 Don't Care Mode 4 Don't Care Shutdown Mode Note: For a valid result SDI must be 1 for the first device. www.austriamicrosystems.com t t P(I/O) P(I/O) t GSW(ERROR FLAG(IN) FLAG(IN) Don’t Don’t T FLAG Care ...

Page 12

... Table 8. Overtemperature Modes Effective Output Output Port State Point Conditions Don’t Care Temperature > T Don’t Care Temperature < T www.austriamicrosystems.com at pin SDO of the last device in the chain. This means it is not possi- SW(ERROR) and V DS Detected Open-LED Error Status Code < V ...

Page 13

... The detailed temperature warning report would look like this: XXXXXXXXXXXXXXX1 XXXXXXXXXXXXXXX1 XXXXXXXXXXXXXXX0 XXXXXXXXXXXXXXX1 The 0 in the detailed temperature warning report indicates that IC3 is the device with the over-temperature condition. Note actual report there are no spaces in the output. www.austriamicrosystems.com Detailed Error Report Readout t H(L) t ...

Page 14

... This test can be used also on-the-fly without using an all 1s test pattern Note 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 Detailed Error Report Readout t ...

Page 15

... 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 Detailed Error Report Readout t ...

Page 16

... Note: In shutdown mode the supply current drops down to <10µA. Figure 17. Shutdown Mode Timing Diagram OEN LD t SU(ERROR) CLK SDI SDO www.austriamicrosystems.com . With the next rising edge of OEN the current will immedi- LC Load Internal all 1s t SU(ERROR) Test Pattern (optional) t GSW(ERROR) ...

Page 17

... Data0 3x Clocks Low- Current Mode CLK 1024x Rising Edge of OEN OEN Acquisition of Error Status LD ≤ 50mA Current www.austriamicrosystems.com Data2 Data3 T Error Code GEF Data1 Clock for Error Mode 0x/1x/2x 1024x Rising Edge of OEN Acquisition of Error Status Falling Edge of LD; Error Register is copied into Shift Register ≤ ...

Page 18

... Note: When n*AS1113 devices are in one chain, n*16 clock pulses are needed to latch-in the input data. Figure 21. Cascading AS1113 Devices SDI AS1113 #1 SDI CLK LD OEN CLK LD OEN www.austriamicrosystems.com Low-Current Diagnosis Mode Data2 Error Code GEF from Test Pattern Clock for Error Mode 1x/2x Mode 1024x Rising Edge of OEN Acquisition of Error Status Falling Edge of LD ...

Page 19

... LED F DROP Note: Resistors or zener diodes can be used as a voltage reducer as shown in www.austriamicrosystems.com ) set by external resistor (R REF EXT the output current in the saturation region is extremely flat so that it is possi can be calculated by: OUT TARGET V = 1.253V REXT ...

Page 20

... AS1113 Data Sheet - Figure 22. Voltage Reducer using Resistor (Left) and Zener Diode (Right) Voltage Supply } V DROP V LED AS1113 www.austriamicrosystems.com Voltage Supply { V DROP AS1113 Revision 1.02 V LED ...

Page 21

... 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. www.austriamicrosystems.com -B- SEE ...

Page 22

... AS1113 Data Sheet - Figure 24. 24-pin SSOP Package Symbol Min Max A 1.35 1.75 A1 0.10 0.25 A2 1.37 1.57 b 0.20 0.30 C 0.19 0.25 D 8.55 8.74 E 5.79 6.20 E1 3.81 3.99 e 0.635 BSC h 0.22 0.49 L 0.40 1.27 θ 0º 8º www.austriamicrosystems.com Revision 1. ...

Page 23

... AS1113-BSST 50mA, 16-Channel LED Driver with Diagnostics AS1113-BQFR 50mA, 16-Channel LED Driver with Diagnostics AS1113-BQFT 50mA, 16-Channel LED Driver with Diagnostics All devices are RoHS compliant and free of halogene substances. www.austriamicrosystems.com Table 9. Description Delivery Form Tape and Reel Tape and Reel Revision 1 ...

Page 24

... 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 tech- nical data herein ...

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