参数资料
型号: A8511KLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 14/24页
文件大小: 0K
描述: IC LED DVR 150MA AUTO 28-TSSOP
标准包装: 1
拓扑: PWM,升压(升压)
输出数: 4
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 高亮度 LED(HBLED),RGB,白色 LED
频率: 600kHz ~ 2.1MHz
电源电压: 8 V ~ 21 V
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 28-TSSOP 裸露焊盘
包装: 标准包装
工作温度: -40°C ~ 125°C
其它名称: 620-1367-6
A8511
2 MHz, 4 Channel×150 mA WLED/RGB Driver
With Output Disconnect
Performance Characteristics
Disconnect Switch Overcurrent Fault Timing Diagram
V CAP
V OUT
30 V
A
B
C
D
E
F
G
V COMP
5V
1.35 A
t
t
I OUT
t
30 V
V SW
t
5V
V EN
t
A
B
C
D
E
F
G
A. Overcurrent on disconnect switch is detected and disconnect
switch latches off. Boost is turned off when >3 V is detected
across the disconnect switch. LEDs stop sinking current
because there is insufficient voltage across them.
B. COMP pin reaches lockout level. LEDs are internally turned
off and the COMP pin is discharged.
C. COMP pin reaches ground voltage, LEDs are internally turned
on, in soft start mode, and boost is put into soft start mode.
Boost and LEDs remain off because V OUT is still at ground
potential due to the disconnect switch being latched off.
D. User turns off EN.
E. The A8511 shuts down when EN is off for more than 131,072
clock cycles. If any other fault conditions were present prior
to shutdown, such as: open LED, TSD, shorted LED, or
secondary OVP, these are now cleared and the part is ready
to be re-enabled.
F. User re-enables operation. A8511 enters soft start mode.
G. Soft start mode finished.
8511-DS
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
14
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