- 您现在的位置：买卖IC网 > Datasheet目录306 > A3944KLPTR-T (Allegro Microsystems Inc)IC PREDRIVER MOSFET 6CH TSSOP Datasheet资料下载
参数资料
| 型号： | A3944KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 23/31页 |
| 文件大小： | 0K |
| 描述： | IC PREDRIVER MOSFET 6CH TSSOP |
| 标准包装： | 8,000 |
| 配置： | 低端 |
| 输入类型： | 并行/串行 |
| 延迟时间： | 200ns |
| 电流 - 峰： | 50mA |
| 配置数： | 6 |
| 输出数： | 6 |
| 电源电压： | 6 V ~ 40 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： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页第29页第30页第31页
A3944
Automotive, Low Side FET Pre-Driver
the drain clamp in the A3944. The maximum current, the A3944
Note that this equation is only valid for normal load and open
drain clamp maximum current, I DRNC , will be:
P DRNC
I DRNC =
V DCL
where
P DRNC is the A3944 drain clamp maximum power and
V DCL is the A3944 drain clamp voltage.
Substituting into equation 5:
(5)
load conditions when:
V DRNx > V OCL
where V OCL is the open load clamp voltage.
Ideally an open load would mean an infinite or at least a very
large (>1 M Ω ) resistance. In practice this is not necessarily the
case, and the limit of open-load resistance values for correct
detection will be determined by: the threshold voltages, the diag-
nostic currents, and the load voltage.
An open load is detected when:
I DRNC =
100 mW
54 V
= 1.8 mA
V DRNx < V OL
where V OL is the open load detect voltage, then:
As given in equation 1, the value of the drain resistor is the volt-
age across the resistor divided by the maximum current:
? V OL > V DRNx ,
? V OL > V L – I DPD ( R L + R D ) ,
(from 6)
R Dx =
V FET – V DCL
I DRNC
∴ R L > [( V L – V OL ) / I DPD ] + R D . (7)
There are two open-load resistance values to consider. The first is
the minimum resistance at which an open load detection is always
R Dx =
60 V – 54 V
1.8 mA
= 3.3 k Ω
guaranteed. The second is the maximum resistance that a load can
present without ever causing an open load to be detected. Both
cases, described below, assume that the load is connected to the
The maximum repetition rate is irrelevant in this case because the
A3944 will sustain the maximum clamp dissipation indefinitely.
load supply and that the load supply is higher than the open load
clamp voltage, V OCL .
V L
Practical Open Load Limits
An open load is detected, when the external FET is off, if the
voltage at the DRNx terminal is less than the open load threshold,
V OL , but greater than the short to ground threshold, V STG . The
voltage at the DRNx terminal in the off-state is defined as (refer-
ring to figure 13):
V DRNx = V L – I DPD ( R L + R D ) (6)
where
+
-
V OL
I DPD
DRNx
R D
R L
V DRNx is the voltage at the DRNx terminal,
V L is the load supply voltage,
I DPD is the diagnostic pull-down current,
R L is the load resistance, and
R D is the DRNx current limit resistor.
V OCL
Figure 13. Open load detection condition
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
23
相关PDF资料 |
PDF描述 |
|---|---|
| A3985SLDTR-T | IC MOSFET DRVR PROG DUAL 38TSSOP |
| A4933KJPTR-T | IC PREDRIVER MOSFET 3PH 48LQFP |
| A4935KJPTR-T | IC MOSFET DVR AUTO 3PH 48-LQFP |
| A4940KLPTR-T | IC MOSF DVR FULL BRIDGE 24TSSOP |
| A6210GEUTR-T | IC LED DRIVER HIGH BRIGHT 16-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A3946 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Half-Bridge Power MOSFET Controller |
| A3946GLPTR-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| A3946KLB | 功能描述:IC CTRLR MOSFET 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3946KLB-T | 功能描述:IC MOSFET CONTROLLER 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3946KLBTR | 功能描述:IC CTRLR MOSFET 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
发布紧急采购，3分钟左右您将得到回复。