AS1109-BSOT austriamicrosystems, AS1109-BSOT Datasheet - Page 16

• Manufacturer Part Number: AS1109-BSOT
• Description: IC LED 4-BIT CC DRIVER 16-SOIC
• Manufacturer: austriamicrosystems
• Type: General Purposer

Specifications of AS1109-BSOT

• Constant Current: *
• Constant Voltage: *
• Topology: *
• Number Of Outputs: *
• Internal Driver: *
• Type - Primary: *
• Type - Secondary: *
• Frequency: *
• Voltage - Supply: *
• Voltage - Output: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Operating Temperature: *
• Current - Output / Channel: *
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Other names: AS1109-BSOTTR

AS1109
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 18. Switching into Low-Current Diagnostic Mode Timing Diagram
Shutdown Mode
The AS1109 features a shutdown mode which can be entered via 4 clock pulses during error-detection mode. To enable the shutdown mode a 0
must be placed at SDI after the rising edge of the 3rd clock pulse.
To disable shutdown mode a 1 must be placed at SDI after the 3rd clock pulse. The shutdown/wakeup information will be latched through if mul-
tiple AS1109 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit will be read out and the AS1109 will shutdown or
wakeup.
Note: In shutdown mode the supply current drops down to typically 3µA.
Figure 19. Shutdown Mode Timing Diagram
www.austriamicrosystems.com/LED-Driver-ICs/AS1109
For detailed timing information see
OEN
SDO
CLK
SDI
LD
t
SU(ERROR)
Timing Diagrams on page
OEN
SDO
CLK
SDI
LD
t
GSW(ERROR)
T
t
FLAG
P4
t
T
Global Flag Readout
SU(ERROR)
t
GSW(ERROR)
t
FLAG
9.
t
P1
SW(ERROR)
O
FLAG
S
FLAG
O
FLAG
t
GSW(ERROR)
Revision 1.20
Load Internal all 1s
Don’t
Care
Test Pattern
(optional)
S
FLAG
t
t
P4
H(L)
Normal Operation Current
Re-entering Error
Detection Mode
t
1 = Wakeup
0 = Shutdown
1 = Wakeup
0 = Shutdown
SU(D)
t
H(L)
2µs Low-Current
Diagnosis Mode
t
TESTING
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