参数资料
型号: A8515GLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 6/34页
文件大小: 0K
描述: IC LED DVR WHT/RGB BKLGT 16TSSOP
标准包装: 8,000
拓扑: PWM,升压(升压)
输出数: 2
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 600kHz ~ 2.5MHz
电源电压: 5 V ~ 40 V
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm)裸露焊盘
供应商设备封装: 16-TSSOP-EP
包装: 带卷 (TR)
工作温度: -40°C ~ 105°C
A8515
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
ELECTRICAL CHARACTERISTICS 1 (continued) Valid at V IN = 16 V, T A = 25°C, indicates specifications guaranteed by design
and characterization over the full operating temperature range with T A = T J = –40°C to 105°C; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ. 2
Max.
Unit
Oscillator Frequency
R FSET = 10 k Ω
1.8
2
2.2
MHz
Oscillator Frequency
FSET/SYNC Pin Voltage
FSET Frequency Range
f SW
V FSET
f FSET
R FSET = 20 k Ω
R FSET = 35.6 k Ω
R FSET = 10 k Ω
?
?
?
580
1
580
1.00
?
?
?
?
2500
MHz
kHz
V
kHz
Synchronization
Synchronized PWM Frequency
Synchronization Input
Minimum Off-Time
Synchronization Input
Minimum On-Time
f SWSYNC
t PWSYNCOFF
t PWSYNCON
580
150
150
?
?
?
2300
?
?
kHz
ns
ns
SYNC Input Logic Voltage
V SYNC(H)
V SYNC(L)
FSET/SYNC pin, high level
FSET/SYNC pin, low level
?
2.0
?
?
0.4
?
V
V
LED Current Sinks
LEDx Accuracy
LEDx Matching
LEDx Regulation Voltage
I SET to I LEDx Current Gain
ISET Pin Voltage
Allowable ISET Current
V LED Short Detect
Soft Start LEDx Current
Err LED
Δ LEDx
V LED
A ISET
V ISET
I SET
V LEDSC
I LEDSS
I SET = 120 μ A
I SET = 120 μ A
V LED1 = V LED2 , I SET = 120 μ A
I SET = 120 μ A
While LED sinks are in regulation, sensed
from LEDx pin to GND
Current through each enabled LEDx pin
during soft start
?
?
?
960
?
40
4.6
?
0.5
0.5
720
980
1.003
?
?
3.2
2
1
?
1000
?
125
?
?
%
%
mV
A/A
V
μ A
V
mA
Measured while EN/PWM = low, during
Maximum PWM Dimming
Until Off-Time
Minimum PWM On-Time
EN/PWM High to LED-On Delay
EN/PWM Low to LED-Off Delay
t PWML
t PWMH
t dPWM(on)
t dPWM(off)
dimming control and internal references
are powered-on (exceeding t PWML results in
shutdown)
First cycle when powering-up device
Time between PWM enable and LED current
reaching 90% of maximum
Time between PWM enable going low and
LED current reaching 10% of maximum
?
?
?
?
32,750
0.75
0.5
?
?
2
1
500
f SW
cycles
μ s
μ s
ns
GATE Pin
Gate Pin Sink Current
Gate Fault Shutdown
Gate Voltage
I GSINK
t GFAULT
V GS
V GS = 0 V with respect to V IN
Gate to source voltage measured when gate
is on
?
?
?
? 104
?
-6.7
?
3
?
μ A
μ s
V
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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