- 您现在的位置：买卖IC网 > Datasheet目录307 > A8509GLPTR-T (Allegro Microsystems Inc)IC LED DVR WHITE 4X120MA 24TSSOP Datasheet资料下载
参数资料
| 型号： | A8509GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 10/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHITE 4X120MA 24TSSOP |
| 标准包装： | 8,000 |
| 拓扑： | PWM，SEPIC，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 300kHz ~ 800kHz |
| 电源电压： | 9 V ~ 40 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
A8509
Frequency selection
Wide Input Voltage Range, High Efficiency
4-Channel Fault Tolerant LED Driver
V OUT
The switching frequency on the boost regulator is set by con-
necting a resistor between the FSET/SYNC pin and ground.
C2
V FSET/SYNC
The switching frequency range is 300 to 800 kHz, with example
values of:
I IN
FSET/SYNC shorted to GND
R FSET Value
(k Ω )
7.5
10
Swtiching Frequency, f SW
(kHz)
800
600
C1
C3
I OUT
The relationship of R FSET and f SW is shown in figure 9.
The FSET/SYNC pin has short-to-ground protection. If the
FSET/SYNC pin is held low for more than 4 μ s typical, the
A8509 will stop switching and disable the LEDx pins (see figures
10 and 11). If the FSET/SYNC pin is released at any time after
7 μ s, the A8509 will proceed to soft start but will not perform the
LED detection phase.
C4
t
Figure 10. Shutdown when the FSET/SYNC pin is shorted to ground;
shows V OUT (ch1, 10 V/div.), V FSET/SYNC (ch2, 1 V/div.), I IN (ch3, 2 A/div.),
and I OUT (ch4, 500 mA/div.), t = 200 μ s/div.
V OUT
V FSET/SYNC
FSET/SYNC shorted to GND
Synchronization
C2
I IN
The A8509 can also be synchronized by using an external clock
connected to the FSET/SYNC pin. The synchronization func-
tion of IC was designed to work with a push-pull type of clock
driver. The amplitude of the clock signal should be between
1.5 and 3.3 V. The synchronization clock should have duty
cycles that meet the minimum on/off times. Figure 12 shows the
timing for a synchronization clock into the A8509 at 800 kHz.
The 150 ns minimum on-time and 150 ns minimum off-time are
900
800
700
C1
C3
I OUT
C4
t
Figure 11. Zoomed-in view of figure 9, showing quick shutdown when
FSET/SYNC shorted to ground, preventing IC running at very high
frequency; shows V OUT (ch1, 10 V/div.), V FSET/SYNC (ch2, 1 V/div.),
I IN (ch3, 2 A/div.), and I OUT (ch4, 1 A/div.), t = 10 μ s/div.
600
500
400
300
200
t PWSYNCON
150 ns
950 ns
7
9
11 13 15 17
FSET Resistor Value, R FSET (k Ω )
19
21
T = 1.25 μ s
150 ns
t PWSYNCOFF
Figure 9. Switching Frequency as determined by R FSET value.
Figure 12. SYNC pulse minimum on and off time
requirements, for an 800-kHz clock.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
相关PDF资料 |
PDF描述 |
|---|---|
| A8510GECTR-T | IC LED DRVR BCKLGHT/WHT 26QFN-EC |
| A8511KLPTR-T | IC LED DVR 150MA AUTO 28-TSSOP |
| A8512ELBTR-T | IC LED DVR WHT/RGB BKLGT 24SOIC |
| A8513KLPTR-T | IC LED DRVR AUTO BCKLGHT 16TSSOP |
| A8514KLPTR-T | IC LED DVR WHT 4X80MA 16-ETSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A8510 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency |
| A8510GECTR-T | 功能描述:IC LED DRVR BCKLGHT/WHT 26QFN-EC 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 |
| A8511 | 制造商:ROCKWE 功能描述: |
| A8511KLPTR-T | 功能描述:IC LED DVR 150MA AUTO 28-TSSOP 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 |
| A8512 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:LED Backlight Driver for Medium/Large Displays |
发布紧急采购，3分钟左右您将得到回复。