参数资料
型号: A8513KLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 15/25页
文件大小: 0K
描述: IC LED DRVR AUTO BCKLGHT 16TSSOP
特色产品: Allegro A8513 LED Driver
标准包装: 1
拓扑: PWM,SEPIC,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 白色 LED
频率: 1.8MHz ~ 2.2MHz
电源电压: 4.5 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: 标准包装
工作温度: -40°C ~ 125°C
其它名称: 620-1440-6
A8513
Input UVLO
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
Shutdown
When V IN rises above the UVLO threshold V UVLOrise , the A8513
can be enabled by asserting EN/PWM. The A8513 is disabled
when V IN falls below V UVLOfall – V UVLOhys for more than 1 μ s
(figure 18). This 1 μ s lag prevents false shut downs during
momentary glitches on the input power supply.
VDD
The VDD pin provides regulated bias supply for internal circuits.
Connect a capacitor, C VDD , with a value of 0.01 to 0.1 μ F to
this pin.
V IN
FAULT
C1
If the EN/PWM pin is pulled low for more than t PWML , the
device enters shutdown mode and clears all internal fault regis-
ters. In shutdown, the A8513 will disable all current sources and
wait until EN/PWM goes high to re-enable the IC.
A
A
B
B
C2
C3
C4
I LED
EN/PWM
t
Figure 18. Input UVLO. (A) UVLO tripped (V IN , ch1, 2 V/div.), (B) fault flag
set (ch2, 2 V/ div.). Shows LED current (ch3, 100 mA/div.) and EN/PWM
(ch4, 1 V/div.), time = 5 ms/div.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
15
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