AS1109 EB austriamicrosystems, AS1109 EB Datasheet - Page 13

• Manufacturer Part Number: AS1109 EB
• Description: BOARD EVAL AS1109
• Manufacturer: austriamicrosystems

Specifications of AS1109 EB

• Current - Output / Channel: 0.5 ~ 100 mA
• Outputs And Type: 8, Non-Isolated
• Voltage - Output: 0 ~ 15 V
• Features: Over-Temperature, Open-LED, Shorted-LED, Diagnostics
• Voltage - Input: 3 ~ 5.5 V
• Utilized Ic / Part: AS1109
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

AS1109
Datasheet - D e t a i l e d D e s c r i p t i o n
Detailed Error Reports
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. This data will show at the output driv-
ers, at the falling edge of OEN.
Detailed Temperature Warning Report
The detailed temperature warning report can be read out immediately after global error mode has been run. Bit0 of the 8bit data word represents
the temperature flag of the chip.
Figure 15. Detailed Temperature Warning Report Timing Diagram
Detailed Temperature Warning Report Example
Consider a case where five AS1109s are cascaded in one chain. The detailed error report lists the temperatures for each device in the chain:
In this case, IC4 is overheated and will generate a global error, and therefore 5*8 clock cycles are needed to write out the detailed temperature
warning report, and optionally read in new data. The detailed temperature warning report would look like this:
The 0 in the detailed temperature warning report indicates that IC4 is the device with the over-temperature condition.
Note: In an actual report there are no spaces in the output.
www.austriamicrosystems.com/LED-Driver-ICs/AS1109
For detailed timing information see
OEN
SDO
CLK
SDI
LD
Global Flag Readout
t
GSW(ERROR)
t
t
(SU)ERROR
P4
Timing Diagrams on page
T
FLAG
XXXXXXX1 XXXXXXX1 XXXXXXX1 XXXXXXX0 XXXXXXX1
IC1:[70°] IC2:[85°] IC3:[66°] IC4:[160°] IC5:[76°]
9.
t
P4
t
H(L)
DBit7
Temperature Error Report Output
Revision 1.20
DBit6
Detailed Error Report Readout
DBit5
New Data Input
Undefined
DBit4
DBit3
DBit2
DBit1
DBit0
TBit0
t
P1
Don’t
Care
Don’t
Care
13 - 26