AS1113-BQFT austriamicrosystems, AS1113-BQFT Datasheet - Page 12

• Manufacturer Part Number: AS1113-BQFT
• Description: IC DRIVER LED 16-CHAN 28-TQFN
• Manufacturer: austriamicrosystems
• Type: General Purposer

Specifications of AS1113-BQFT

• Constant Current: Yes
• Topology: 16-Bit Shift Register, PWM
• Number Of Outputs: 16
• Internal Driver: Yes
• Type - Primary: General Purpose
• Frequency: 50MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 15V
• Mounting Type: Surface Mount
• Package / Case: 28-WQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 50mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -

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*t
ble 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.
Error Detection Functions
Open-LED Detection
The AS1113 open-LED detection is based on the comparison between V
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.
Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error
Table 6. Open LED Detection Modes
Shorted-LED
The AS1113 shorted-LED detection is based on the comparison between V
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 V
ing conditions. This can be achieved by reducing the V
Note: LEDs which are turned off at test time cannot be tested and will be shown as a logic 1 in the detailed error
Table 7. Shorted LED Detection Modes
Overtemperature
Thermal protection for the AS1113 is provided by continuously monitoring the device’s core temperature. The overtem-
perature status is aquired at the rising edge of OEN and stored internally.
Table 8. Overtemperature Modes
www.austriamicrosystems.com/LED-Driver-ICs/AS1113
Output Port State
Output Port State
Output Port State
report.
report.
Don’t Care
Don’t Care
On
On
On
On
P(I/O)
Temperature > T
Temperature < T
Point Conditions
Point Conditions
Point Conditions
Effective Output
Effective Output
Effective Output
+ t
V
V
V
V
DS
DS
SW(ERROR)
DS
DS
< V
> V
> V
< V
THH
THH
THL
THL
OV1
OV1
at pin SDO of the last device in the chain. This means it is not possi-
LED
Revision 1.04
voltage or by adding additional diodes, resistors or LED’s.
Detected Overtemperature
Detected Shorted-LED
Detected Open-LED
Error Status Code
Error Status Code
Status Code
THH
DS
0
1
under low-current diagnostic mode operat-
0
1
DS
0
1
and V
and V
THL
THH
. The open LED status is aquired
. The shortened LED status is
Overtemperature
Open Circuit
Short Circuit
Condition
Meaning
Meaning
Meaning
Normal
Normal
Normal
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