参数资料
型号: A8514KLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 12/42页
文件大小: 0K
描述: IC LED DVR WHT 4X80MA 16-ETSSOP
标准包装: 8,000
拓扑: PWM,SEPIC,升压(升压)
输出数: 4
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 白色 LED
频率: 580kHz ~ 2MHz
电源电压: 5 V ~ 40 V
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 20-TSSOP-EP
包装: 带卷 (TR)
工作温度: -40°C ~ 125°C
A8514
LED1
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
LED1
C1
LED detection period
C1
LED detection period
C2
C2
C3
LED2
ISET
C3
LED2
ISET
C4
PWM/EN
C4
PWM/EN
t
4A. An LED detect occurring when both LED pins are selected to be used;
shows LED1 (ch1, 500 mV/div.), LED2 (ch2, 500 mV/div.), ISET (ch3,
1 V/div.), and PWM/EN (ch4, 5 V/div.) pins, time = 500 μ s/div.
Pin shorted
t
4B. Example with LED2 pin not being used; the detect voltage is
about 150 mV; shows LED1 (ch1, 500 mV/div.), LED2 (ch2, 500 mV/div.),
ISET (ch3, 1 V/div.), and PWM/EN (ch4, 5 V/div.) pins, time = 500 μ s/div.
Short removed
LED1
C1
LED2
C2
ISET
C3
C4
PWM/EN
t
4C. Example with one LED shorted to ground. The IC will not proceed with
power-up until the shorted LED pin is released, at which point the LED is
checked to see if it is being used; shows LED1 (ch1, 500 mV/div.), LED2 (ch2,
500 mV/div.), ISET (ch3, 1 V/div.), and PWM/EN (ch4, 5 V/div.) pins,
time = 1 ms/div.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
12
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