A6285
16-Channel Constant-Current Latched LED Driver
with Open LED Detection and Dot Correction
Operating Characteristics
ELECTRICAL CHARACTERISTICS
at T
A1
= 25°C, V
DD
= 3.0 to 5.5 V, unless otherwise noted
Characteristic
Logic Supply Voltage Range
LED Load Supply Output Voltage
Undervoltage Lockout
Output Current
Symbol
Test Conditions
V
DD
Operating
V
LED
Operating
V
DD
0
→
5.0 V
V
DD(UV)
V
DD
5
→
0.0 V
V
DS
= 1 V, R
EXT
= 600
Ω
I
O
V
DS
= 1 V, R
EXT
= 1.2 kΩ
1 V = V
DS(x)
, R
EXT
= 600
Ω;
All outputs on
Err
1 V = V
DS(x)
, R
EXT
= 1.2 kΩ;
All outputs on
V
DS(X)
= 1 to 3 V, R
EXT
= 600
Ω;
∆I
Oreg
All outputs on
I
DSS
V
OH
= 12 V
V
IH
V
IL
V
Ihys
All digital inputs
I
I
All digital inputs
V
OL
I
OL
= 1 mA
V
OH
I
OH
= –1 mA
R
EXT
= 9.6 kΩ, V
OE
= 5 V
I
DD(OFF)
R
EXT
= 1.2 kΩ, V
OE
= 5 V
All outputs on, R
EXT
= 1.2 kΩ, V
O
= 1 V,
data transfer 30 MHz
I
DD(ON)
All outputs on, R
EXT
= 600
Ω,
V
O
= 1 V,
data transfer 30 MHz
V
OUT(0)
I
OUT
= 5 mA; faults asserted
I
OUT(1)
V
OUT
= 5.5 V, open drain; faults negated
I
OUT(0)
V
LED
= 1 V, all outputs off
T
JTSD
Temperature increasing
T
JTSDhys
V
LOD
V
EXT
R
EXT
= 600
Ω
Min.
3.0
–
2.5
2.3
70
35
–
–
–
–
0.8×V
DD
GND
250
–1
–
V
DD
– 0.5
–
–
–
–
–
–
–
–
–
–
1.21
Typ.
2
5.0
–
2.7
2.5
80
40
+1.0
+1.0
–
–
–
–
–
–
–
–
–
–
–
26
–
–
2.8
165
15
0.30
1.25
Max.
5.5
12.0
2.9
2.7
90
45
+4.0
+4.0
+6.0
0.5
V
DD
0.2×V
DD
900
1
0.5
–
6
17
25
35
0.4
1
–
–
–
0.40
1.31
Unit
V
V
V
V
mA
mA
%
%
%
μA
V
V
mV
μA
V
V
mA
mA
mA
mA
V
μA
mA
°C
°C
V
V
Output to Output Matching Error
4
Load Regulation
Output Leakage Current
Logic Input Voltage
Logic Input Voltage Hysteresis
Logic Input Current
SDO Voltage
Supply Current
3
FAULT Output
Active Pull-up
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Open LED Detection Threshold
Reference Voltage at R
EXT
1
Tested
2
Typical
at 25°C. Specifications are assured by design and characterization over the operating temperature range of –40°C to 85°C.
data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for
individual units, within the specified maximum and minimum limits.
3
Recommended operating range: V = 1.0 to 3.0 V.
O
4
Err = (I (min or max) – I (av)) / I (av).
O
O
O
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
