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| 型号： | A8508GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHITE 8X120MA 24TSSOP |
| 标准包装： | 8,000 |
| 拓扑： | PWM，SEPIC，升压（升压） |
| 输出数： | 8 |
| 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 |
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A8508
Wide Input Voltage Range, High Efficiency
8-Channel Fault Tolerant LED Driver
Pin-out Diagrams
SENN 1
24 PGND
SENN 1
24 PGND
VDD
NC
FAULT
1
2
3
21 GATE
20 SENP
19 SENN
SENP 2
GATE 3
VDR 4
COMP 5
23 LED1
22 LED2
21 LED3
20 LED4
SENP 2
GATE 3
VDR 4
COMP 5
23 LED1
22 LED2
21 LED3
20 LED4
OVP
HVGATE
VSENSE
VIN
4
5
6
7
PAD
18 PGND
17 LED1
16 LED2
15 LED3
MODE 6
EN 7
PWM 8
FSET/SYNC 9
PAD
19 AGND
18 LED5
17 LED6
16 LED7
MODE 6
EN 7
PWM 8
FSET/SYNC 9
19 AGND
18 LED5
17 LED6
16 LED7
ET Package
ISET 10
VDD 11
FAULT 12
LP Package
15 LED8
14 VIN
13 OVP
ISET 10
VDD 11
FAULT 12
15 LED8
14 VIN
13 OVP
LW Package
Terminal List Table
Name
AGND
COMP
EN
ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ
FSET/SYNC
GATE
HVGATE
ISET
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
MODE
OVP
PAD
PGND
PWM
SENN
SENP
VDD
VDR
VIN
VSENSE
ET
13
23
25
3
27
21
5
28
17
16
15
14
10
8
11
12
24
4
–
18
26
19
20
1
22
7
6
Number
LP, LW
19
5
7
12
9
3
n.a.
10
23
22
21
20
18
17
16
15
6
13
–
24
8
1
2
11
4
14
n.a.
Function
LED ground.
Output of the error amplifier and compensation node. Connect a compensation network from this pin to ground.
Enable for the A8508.
This pin is used to indicate a fault condition. Connect a pull-up resistor between this pin and the required logic level
voltage. The pin is an open drain type configuration that will be pulled low when a fault occurs.
Frequency/synchronization pin. A resistor RFSET from this pin to ground sets the switching frequency. This pin can also
be used to synchronize two or more converters in the system.
Gate pin for driving external N-channel FET.
Input disconnect switch: gate driver
Connect the RISET resistor between this pin and ground to set the 100% LED current.
Connect the cathode of each LED string to these pins.
This pin is used to determine the mode of operation. MODE high tied to VDD allows parallel operation, and MODE low is
used for single IC operation.
This pin is used to sense an Overvoltage (OVP) condition. Connect the ROVP resistor from VOUT to this pin to adjust
the overvoltage protection.
For QFN and TSSOP packages, this exposed pad provides enhanced thermal dissipation. This pad must be connected
to the ground plane(s) of the PCB with at least 8 vias, directly in the PAD solder pad.
Power ground for the internal gate driver circuit.
PWM dimming pin. Used to control the LED intensity by using pulse width modulation. The typical PWM dimming
frequency is in the range of 100 to 1000 Hz.
Negative sense line for boost switch current sensing.
Positive sense line for boost switch current sensing.
Output of internal LDO regulator. Connect a 0.1 μ F decoupling capacitor between this pin and ground.
Output of the gate driver bias voltage regulator. Connect a 0.22 μ F capacitor in series with a 7.5 Ω resistor between this
pin and ground.
Input power to the A8508.
Input disconnect switch: current sense
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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相关代理商/技术参数 |
参数描述 |
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| A8509 | 制造商:ROCKWE 功能描述: |
| A8509GLPTR-T | 功能描述:IC LED DVR WHITE 4X120MA 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| 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: |
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