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参数资料
| 型号： | A8513KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 16/25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
Fault protection during operation
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
The latching faults can be cleared in two ways:
The A8513 constantly monitors the state of the system to deter-
mine if any fault conditions occur. The response to a triggered
fault condition is summarized in the table below.
Note: Some of the protection features might not be active during
startup, to prevent false triggering of fault conditions.
Fault Mode Table
? Keep the EN/PWM pin low for more than 16 ms.
? Cycle the power to create a UVLO condition.
Fault behavior diagrams are shown in figures 18, 19 and 20.
Fault Name
Primary Switch
Current Protection
(cycle-by-cycle
current limit)
Secondary Switch
Current Limit
Type
Auto-restart
Latched
Active
Always
Always
Fault
Flag Set
No
Yes
Description
This fault condition is triggered by the cycle-by-cycle
current limit I SW(LIM) . Prevents current in inductor from
exceeding I SW(LIM) .
When the current through the boost switch exceeds
the secondary current SW limit, I SW(LIM2) , the A8513
immediately shuts down.
Boost
Off for a single
cycle
Off
Sink
driver
On
Off
Secondary overvoltage protection is used for open
Secondary OVP
Latched
Always
Yes
diode detection. When diode D1 opens, the switch pin
Off
Off
voltage will increase until V OVP(sec) is reached.
LED Pin Short
Protection
Auto-restart
Startup
Yes
This fault prevents the A8513 from starting-up if
the LED pin is shorted to ground. After the short is
removed, soft-start is allowed to begin.
Off
Off
This fault occurs when the I SET current goes above
150% of the maximum Allowable ISET Current,
ISET Short
Protection
Auto-restart
Always
Yes
I SET (max). The boost will stop switching and the IC will
disable the LED sinks until the fault is removed. When
Off
Off
the fault is removed, the IC tries to regulate to the
preset LED current.
This fault occurs when the OVP pin exceeds the
LED String Open
Protection
Latched
Always
Yes
V OVPHI(th) threshold. The A8513 immediately stops
switching. If at the same time, the LED voltage is below
Off
Off
regulation, the IC will shut down.
Output Overvoltage
Protection
Auto-restart
Always
No
This fault occurs when the OVP pin exceeds V OVPHI(th)
threshold (for example, during a load dump). The
A8513 immediately stops switching, but continues to
Off
On
sink current through the LED pin.
Output
Undervoltage
Protection
Overtemperature
Protection
Auto-restart
Auto-restart
Always
Always
Yes
Yes
This fault occurs when the OVP pin senses less than
110 mV on the pin.
This fault occurs when the die temperature exceeds
T TSD .
Off
Off
Off
Off
Yes until
VIN UVLO
NA
Always
internal
regulator
This fault occurs when V IN drops below V UVLOfall . This
fault resets all latched faults.
Off
Off
shuts down
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
16
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相关代理商/技术参数 |
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|---|---|
| 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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