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参数资料
| 型号： | A6266KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/17页 |
| 文件大小： | 0K |
| 描述： | IC LED CTLR AUTO HI CURR 16TSSOP |
| 标准包装： | 8,000 |
| 恒定电流： | 是 |
| 拓扑： | 低端，PWM，升压 |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 频率： | 100kHz ~ 700kHz |
| 电源电压： | 5 V ~ 50 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 ~ 150°C |
A6266
Automotive, Boost, High Current LED Controller
Two pull-up resistors are used to limit the voltage across the gate-
source junction during high input voltages or load dump condi-
tions. If the battery voltage is restricted, one resistor across the
gate-source junction can be used. The FF1 provides a sink current
of up to 1.3 mA.
This circuit can be used to avoid most hazardous conditions and
protect the circuit components from over-stress. Note that under
extreme cases, the circuit cannot protect against certain fault con-
ditions. For example, when any of the following occurs:
? If the cathode end of the LED string is shorted to VBAT, the
LED sense resistor effectively appears between VBAT and
ground. Depending on the current limit of the source supply or
the input fuse rating, the fault current may damage the resistor.
? If the LF node is shorted to VBAT, the reference LED and
the LED sense resistor effectively appear between VBAT and
ground. Depending on the current limit of the source supply or
the input fuse rating, the fault current may damage the resistor
and /or the reference LED.
? If the cathode end of the LED string is shorted to ground. A
fault current determined by the impedance of the shorting link
(now effectively the LED sense resistor) flows through the
power circuit. The fault current will either: be limited by the
maximum switch current sense, V IDS , or if the source supply
cannot maintain this current, be limited by the source supply.
(The source supply will either: fold back, or if the current
exceeds the input fuse rating, the fuse will blow, creating an
open circuit).
To ensure the A6266 inputs (LP and LN) are not damaged dur-
ing any of the above faults, it is necessary to add a differential
resistor in series with the LN connection (between the sense
resistor and the LN pin). This resistor value should be approxi-
mately 150 Ω .
If an output short is detected but it is necessary to keep the output
active, the FF1 output can be pulled low. This will override the
output disable but will not clear the fault.
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| A6267 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A6267 is a DC-to-DC converter controller, providing a programmable constant current output for driving high power LEDs in series. |
| A6267KLPTR-T | 功能描述:IC LED CTLR AUTO HI CURR 16TSSOP 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 |
| A6268 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A6268 is a DC-to-DC converter controller, providing a programmable constant current output for driving high power LEDs in series. |
| A6268KLPTR-T | 功能描述:IC LED CTLR AUTOMOBILE 16TSSOP 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 |
| A6269 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive LED Array Driver |
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