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| 型号： | A3941KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/21页 |
| 文件大小： | 0K |
| 描述： | IC MOSFET FULL BRDG AUTO 28TSSOP |
| 标准包装： | 1 |
| 配置： | 半桥 |
| 输入类型： | PWM |
| 延迟时间： | 90ns |
| 配置数： | 1 |
| 输出数： | 4 |
| 电源电压： | 5.5 V ~ 50 V |
| 工作温度： | -40°C ~ 150°C |
| 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 |
| 产品目录页面： | 1140 (CN2011-ZH PDF) |
| 其它名称： | 620-1236-6 |
A3941
Automotive Full Bridge MOSFET Driver
tions, the output from the comparators are ignored under two
conditions:
? while the external FET is off, and
? until the end of the period, referred to as the fault blank time ,
after the FET is turned on.
When the FET is turned on, if the drain-source voltage exceeds
the voltage at the VDSTH pin at any time after the fault blank
time, then a short fault will be detected. This fault will be latched
and the FET disabled until reset.
In applications where short detection is not required, this feature
may be disabled by connecting VDSTH to V5 or by applying a
voltage greater than the disable threshold voltage, V DSDIS . This
completely disables the V DS monitor circuits, preventing detec-
tion of short faults and any indication of short faults by the fault
flags. In this condition the external FETs will not be protected by
the A3941.
Short to Supply When V DSTH is less than the disable threshold
voltage, V DSDIS , a short from any of the motor phase connec-
tions to the battery or VBB connection is detected by monitoring
the voltage across the low-side FETs in each phase, using the
appropriate Sx pin and the LSS pin. This drain-source voltage,
V DS , is continuously compared to the voltage on the VDSTH pin.
The result of this comparison is ignored if the FET is not active.
It also is ignored for one fault blank time interval after the FET is
turned on. If, when the comparator is not being ignored, its output
indicates that V DS exceeds the voltage at the VDSTH pin, then
FF2 will be high.
Short to Ground When VDSTH is less than the disable thresh-
old voltage, V DSDIS , a short from any of the motor phase con-
nections to ground is detected by monitoring the voltage across
the high-side FETs in each phase, using the appropriate Sx pin
and the voltage at VDRAIN. This drain-source voltage, V DS , is
continuously compared to the voltage on the VDSTH pin. The
result of this comparison is ignored if the FET is not active. It
also is ignored for one fault blank time interval after the FET is
turned on. If, when the comparator is not being ignored, its output
indicates that V DS exceeds the voltage at the VDSTH pin, FF2
will be high.
Shorted Load The short-to-ground and short-to-supply monitor
circuits will also detect a short across a motor phase winding. In
most cases, a shorted winding will be indicated by a high-side
and low-side fault being detected at the same time. In some cases
the relative impedances may permit only one of the shorts to be
detected.
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 |
|---|---|
| A3942 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Quad High-Side Gate Driver |
| A3942KLG-T | 制造商:Allegro MicroSystems LLC 功能描述:IC,Quad MOSFET Driver,TSSOP,38PIN,PLASTIC |
| A3942KLGTR-T | 功能描述:IC GATE DVR QUAD HISIDE 38-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:5 系列:- 配置:低端 输入类型:非反相 延迟时间:600ns 电流 - 峰:12A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:14.2 V ~ 15.8 V 工作温度:-20°C ~ 60°C 安装类型:通孔 封装/外壳:21-SIP 模块 供应商设备封装:模块 包装:散装 配用:BG2A-NF-ND - KIT DEV BOARD FOR IGBT 其它名称:835-1063 |
| A39438-000 | 制造商:TE Connectivity 功能描述:3012-11-230510-CS2324 |
| A3944 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive, Low-Side FET Pre-Driver |
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