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参数资料
| 型号： | A8513KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 11/25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： | 是 |
| 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
PWM dimming
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
The LED current can be reduced from the 100% current level by
PWM dimming using the EN/PWM pin. When the EN/PWM pin
is pulled high, the A8513 turns on and the LED pin sinks 100%
COMP
current (figure 5). When EN/PWM is pulled low, the boost con-
verter and LED sink are turned off. The compensation (COMP)
pin is floated, and critical internal circuits are kept active.
C1
C2
V LED
The A8513 has very fast turn-on and turn-off times during PWM
dimming to minimize low PWM duty cycle errors. The typical
C3
I LED
PWM signal delay t dPWM(on) is 250 ns (figure 6). The typical
t dPWM(off) time, between the PWM signal and the LED current
going low, is shown in figure 7.
C4
EN/PWM
t
Figure 5. Typical PWM dimming sequence, with PWM dimming frequency
of 1000 Hz and 10% duty cycle; shows COMP (ch1, 1 V/div.), V LED (ch2,
10 V/div.), I LED (ch3, 100 mA/div.), and EN/PWM (ch4, 5 V/div.),
time = 500 μ s/div.
C3
I LED
C4
EN/PWM
t
Figure 6. Typical EN/PWM signal (5 V/div.) to LED current (100 mA/div.)
turn-on delay. The delay measured about 250 ns. V IN is 12 V, V OUT for 10
series LEDs is approximately 36 V, I LED is 150 mA. (time = 500 ns/div.)
C3
I LED
C4
EN/PWM
t
Figure 7. Typical EN/PWM signal (5 V/div.) to LED current (100 mA/div.)
turn-off delay. The typical delay is about 250 ns. (time = 500 ns/div.)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A8513KLYTR-1-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver |
| A8513KLYTR-2-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver |
| A8513KLYTR-3-T | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver |
| A8513KLYTR-T | 功能描述:IC LED DRVR AUTO BCKLGHT 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A8514 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A8514 is a multi-output white LED driver for small-size LCD backlighting. |
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