参数资料
型号: A8515GLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 15/34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
V OUT
COMP
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
V OUT
COMP
C2
EN/PWM
C2
EN/PWM
C1
C3
C4
I LED
t
Figure 12A. Typical PWM diagram showing V OUT , I LED , and COMP pin as
well as the EN/PWM signal. PWM dimming frequency is 500 Hz at 50%
duty cycle; shows V OUT (ch1, 10 V/div.), COMP (ch2, 2 V/div.), EN/PWM
(ch3, 5 V/div.), and I LED (ch4, 100 mA/div.), 500 μ s/div.
EN/PWM
C1
C1
C3
C4
I LED
t
Figure 12B. Typical PWM diagram showing V OUT , I LED , and COMP pin as
well as the EN/PWM signal. PWM dimming frequency is 500 Hz at 1%
duty cycle ; shows V OUT (ch1, 10 V/div.), COMP (ch2, 2 V/div.), EN/PWM
(ch3, 5 V/div.), and I LED (ch4, 100 mA/div.), 500 μ s/div.
EN/PWM
C1
I LED
I LED
C2
t
Figure 12C. Delay from rising edge of EN/PWM signal to LED current;
shows EN/PWM (ch1, 2 V/div.), and I LED (ch2, 50 mA/div.), 200 ns/div.
C2
t
Figure 12D. Delay from falling edge of EN/PWM signal to LED current turn
off; shows EN/PWM (ch1, 2 V/div.), and I LED (ch2, 50 mA/div.), 200 ns/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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