AS1109 Datasheet, PDF (6/25 Pages) ams AG – Constant-Current, 8-Bit LED Driver with Diagnostics

AS1109
Datasheet - Electrical Characteristics
Table 3. Electrical Characteristics (Continued)
Symbol
Parameter
IDD(OFF)0
IDD(OFF)1
IDD(OFF)2
Off
IDD(OFF)3
IDD(ON)1
Supply Current
IDD(ON)2
On
IDD(ON)3
Condition
REXT = Open‚ OUTN0:7 = Off
REXT = 744Ω‚ OUTN0:7 = Off
REXT = 372Ω‚ OUTN0:7 = Off
REXT = 186Ω, OUTN0:7 = Off
REXT = 744Ω‚ OUTN0:7 = On
REXT = 372Ω‚ OUTN0:7 = On
REXT = 186Ω‚ OUTN0:7 = On
Min Typ Max Unit
1.3
2
3.0 3.68
4.7 5.37
8.1 8.73 mA
4.5
5
7.5
8
13.7 15
6.1 Switching Characteristics
VDD = 3.0 to 5.5V, VDS = 0.8V, VIH = VDD, VIL = GND, REXT = 372Ω, VLOAD = 4.0V, RLOAD = 64Ω, CLOAD = 10pF; guaranteed by design.
Table 4. Switching Characteristics
Symbol
tP1
tP2
tP3
tP4
tW(CLK)
tW(L)
tW(OE)
tR ^*
tF ^*
tOR
tOF
tSU(D)
tH(D)
tSU(L)
tH(L)
tTESTING
tSTAG
tSU(OE)
tGSW(ERROR)
tSU(ERROR)
tP(I/O)
tSW(ERROR)
fCLK
tP3,ON
tTP3,OFF
tREXT2,1
tREXT2,1
Parameter
Propagation Delay Time
Propagation Delay Time (Without Staggered
Output Delay)
Propagation Delay Time
Pulse Width
Maximum CLK Rise Time
Conditions
CLK - SDO
LD - OUTNn
OEN - OUTNn
CLK
LD
OEN (@IOUT < 60mA)
Min Typ
5
100
100
15
15
200
Maximum CLK Fall Time
Output Rise Time of VOUT (Turn Off)
Output Fall Time of VOUT (Turn On)
Setup Time for SDI
Hold Time for SDI
Setup Time for LD
Hold Time for LD
Minimum OEN Time for Error Detection
Staggered Output Delay
Output Enable Setup Time
Global Error Switching Setup Time
Global Error Detection Setup Time
Propagation Delay Global Error Flag
Switching Time Global Error Flag
Maximum Clock Frequency
(Cascade Operation)
Low-Current Test Mode
Propagation Delay Time
External Resistor Reaction Time
External Resistor Reaction Time
100
100
5
5
5
5
2000
20
20
10
10
30 50
Turn ON
3
Turn OFF
0.05
Change from REXT1 = 372Ω, IOUT1
0.5
= 50.52mA to REXT2 = 37.2kΩ,
IOUT2 < 1mA
Change from REXT1 = 37.2kΩ,
0.5
IOUT1 = 0.5mA to REXT2 = 372Ω,
IOUT2 > 25mA
Max Unit
10
200 ns
200
10
ns
ns
500 ns
500 ns
200 ns
300 ns
ns
ns
ns
ns
ns
40
ns
ns
ns
ns
5
ns
10
ns
MHz
5
µs
0.1 µs
1
µs
1
µs
* _{If multiple AS1109 devices are cascaded and tr or tf is large, it may be critical to achieve the timing required for data transfer between two}
cascaded LED drivers.
Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality
Control) methods.
www.ams.com/LED-Driver-ICs/AS1109
Revision 1.21
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