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| 型号： | A8515GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 23/34页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHT/RGB BKLGT 16TSSOP |
| 标准包装： | 8,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 600kHz ~ 2.5MHz |
| 电源电压： | 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： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
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A8515
Fault Mode Table
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
Fault Name
Primary switch
overcurrent protection
(cycle-by-cycle
current limit)
Type
Auto-restart
Active
Always
Fault
Flag
Set
No
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) 3.38 A (Typical).
Boost
Off for
a single
cycle
Disconnect
switch
On
Sink
driver
On
When the current through the boost switch exceeds
Secondary switch
current limit
Latched
Always
Yes
secondary current SW limit (I SW(LIM2) ) the device
immediately shuts down the disconnect switch,
LED drivers, and boost. The Fault flag is set. To re-
Off
Off
Off
enable the device, the EN/PWM pin must be pulled
low for 32750 clock cycles.
The device is immediately shut off if the voltage
Input disconnect
current limit
Latched
Always
Yes
across the input sense resistor goes above
V SENSETRIP . The Fault flag is set. To re-enable the
device the EN/PWM pin must be pulled low for
Off
Off
Off
32750 clock cycles.
Secondary overvoltage protection is used for open
diode detection. When diode D1 opens, the SW pin
Secondary OVP
Latched
Always
Yes
voltage will increase until V OVP(SEC) is reached. This
fault latches the IC. The input disconnect switch is
Off
Off
Off
disabled as well as the LED drivers, and the Fault
flag is set. To re-enable the part the EN/PWM pin
must be pulled low for 32750 clock cycles.
This fault prevents the device from starting-up if
LED Pin Short
Protection
Auto-restart
Startup
No
any of the LEDx pins are shorted. The device stops
soft-start from starting while any of the LED pins
are determined to be shorted. Once the short is
Off
On
Off
removed, soft-start is allowed to start.
When an LED pin is open the device will determine
which LED pin is open by increasing the output
Off for
open
LED Pin open
Auto-restart
Normal
Operation
No
voltage until OVP is reached. Any LED string not
in regulation will be turned off. The device will then
On
On
pins.
On
go back to normal operation by reducing the output
voltage to the appropriate voltage level.
This fault occurs when the ISET current goes above
150% of the maximum current. The boost will stop
for all
others.
ISET Short Protection
Auto-restart
Always
No
switching and the IC will disable the LED sinks until
Off
On
Off
the fault is removed. When the fault is removed the
IC will try to regulate to the preset LED current.
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
23
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| A8517KLPTR-T | 功能描述:LED 驱动器 IC 10 输出 DC DC 稳压器 升压（升压） PWM 调光 60mA 28-TSSOP-EP 制造商:allegro microsystems, llc 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:停产 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:10 电压 - 供电（最低）:4.5V 电压 -?供电（最高）:36V 电压 - 输出:- 电流 - 输出/通道:60mA 频率:400kHz ~ 2.3MHz 调光:PWM 应用:汽车级 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:28-SOIC（0.173"，4.40mm 宽）裸露焊盘 供应商器件封装:28-TSSOP-EP 标准包装:1 |
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