A8513 ALLEGRO [Allegro MicroSystems], A8513 Datasheet - Page 6

• Manufacturer Part Number: A8513
• Description: Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A8513
ELECTRICAL CHARACTERISTICS
full operating temperature range with T
Oscillator Frequency
Oscillator Frequency
LED Current Sinks
LED Accuracy
LED Regulation Voltage
I
ISET Pin Voltage
Allowable ISET Current
Soft Start LED Current Gain
Maximum PWM Dimming Off-Time
Minimum PWM On-Time
EN/PWM High to LED-On Delay
EN/PWM Low to LED-Off Delay
Thermal Protection (TSD)
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
1
going into the node or pin (sinking).
2
3
SET
For input and output current specifications, negative current is defined as coming out of the node or pin (sourcing), and positive current is defined as
Ensured by design and characterization, not production tested.
¯ F ¯ ¯ A ¯ ¯ ¯ U ¯ ¯ L ¯ ¯ T ¯ pin is high voltage tolerant
to I
LED
Characteristics
Current Gain
2
2
t
t
Symbol
T
A
dPWM(on)
dPWM(off)
A
Err
t
t
A
V
TSDHYS
V
PWMH
T
ILEDSS
PWML
I
= T
f
SET
1
ISET
ISET
SW
TSD
LED
LED
(continued) Valid at V
J
= –40ºC to125 ºC, typical specifications are at T
A8513KLYTR-1-T, A8513KLPTR-1-T
A8513KLYTR-2-T, A8513KLPTR-2-T
A8513KLYTR-3-T, A8513KLPTR-3-T
A8513KLYTR-4-T, A8513KLPTR-4-T
ISET = 150 μA
ISET = 150 μA
ISET = 150 μA
Current through enabled LED pin during
soft start
Measured while EN/PWM = low during
dimming control, and internal references
are powered-on (exceeding t
shutdown)
First cycle when powering-up A8513
Time between PWM enable and when LED
current reaches 90% of maximum;
V
Time between PWM enable going low
and when LED current reaches 10% of
maximum; V
Temperature rising
PWM
Wide Input Voltage Range, High Efficiency
= 0 → 2 V
PWM
Test Conditions
= 2 → 0 V
IN
= 16 V, T
PWML
A
= 25ºC,
results in
Fault Tolerant LED Driver
indicates specifications guaranteed through the
A
= 25ºC; unless otherwise specified
1014
Min.
450
225
1.8
0.9
40
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
−
−
−
−
−
−
−
−
−
−
1.003
1045
Typ.
500
250
880
250
250
165
1.5
16
20
48
2
1
−
−
Max.
1076
550
275
160
500
500
2.2
1.1
3
−
−
−
−
3
−
−
MHz
MHz
Unit
kHz
kHz
A/A
A/A
mV
ms
μA
μs
ns
ns
ºC
ºC
%
V
6