- 您现在的位置：买卖IC网 > PDF目录1882 > UDN2987LW-6-T (Allegro Microsystems Inc)IC SOURCE DRIVER 8CHAN 20-SOIC PDF资料下载
参数资料
| 型号： | UDN2987LW-6-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/9页 |
| 文件大小： | 0K |
| 描述： | IC SOURCE DRIVER 8CHAN 20-SOIC |
| 标准包装： | 37 |
| 类型： | 高端 |
| 输入类型： | 非反相 |
| 输出数： | 8 |
| 电流 - 输出 / 通道： | 350mA |
| 电流 - 峰值输出： | 500mA |
| 电源电压： | 4.75 V ~ 35 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 其它名称： | 620-1123 |
UDN2987 x -6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Applications Information and Circuit Description
As with all power integrated circuits, the UDN2987LW-6
has a maximum allowable output current rating. The
500 mA rating does not imply that operation at that value
is permitted or even obtainable. The channel output current
trip point is specified as –370 mA, minimum; therefore,
attempted operation at current levels greater than –370 mA
may cause a fault indication and channel shutdown. The
device is tested at a maximum of –350 mA and that is the
recommended maximum output current per driver. It pro-
vides protection for current overloads or shorted loads up to
30 V.
ˉ
ˉ
ˉ
ˉ
All outputs are enabled by pulling the OE/R input high.
When OE/R is low or allowed to float (internal pull-down),
all outputs are inhibited and the latches are reset. Note that
the reset pulse duration (OE/R low) should be at least 1 μ s.
This will ensure safe operation under attempted reset condi-
tions with a shorted load. The latches are also reset during
power-up, regardless of the state of the OE/R input.
The load current causes a small voltage drop across the
internal low-value sense resistor. This voltage is com-
pared to the voltage drop across a reference resistor with
a constant current. The two resistors are matched to
eliminate errors due to manufacturing tolerances or tem-
perature effects. Each channel includes a comparator and
its own latch. An overcurrent fault (V SENSE > V REF ) will
set the affected latch and shut down only that channel.
All other channels will continue to operate normally. The
latch includes a 1 μ s blanking delay, t BLANK , to prevent
unwanted triggering due to crossover currents generated
when switching inductive loads. For an abrupt short circuit,
the blanking and output switching times will allow a brief,
permissible current in excess of the trip current before the
output driver is turned off.
A common thermal shutdown disables all outputs if the
chip temperature exceeds 165°C. At thermal shutdown, all
latches are reset. The outputs are disabled until the chip
cools down to approximately 150°C (thermal hysteresis).
In the event of an overcurrent condition on any channel, or
chip thermal shutdown, the FAULT open-collector output is
pulled low (turned on).
Overcurrent Fault Sense Circuit
V S
+
+
V REF
Matched
V SENSE
To Fault Latch
–
+
–
SENSE
REF
–
I LOAD
I REF
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
相关PDF资料 |
PDF描述 |
|---|---|
| UDQ2916LBTR-T | IC MOTOR DRIVER PWM DUAL 24SOIC |
| UDW2 | SCOTCHLOK INLINE 4-WIRE 16-19AWG |
| UHM-S200DE4-8AP1-TG30 | CONN SOCKET 200POS UHM TYPE B |
| UR2-PK50 | SCOTCHLOK BUTT 19-26AWG 50PCS |
| VO3120 | IC DRIVER IGBT/MOSFET 2.5A 8-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| UDN2987LWTR-6-T | 功能描述:IC SOURCE DRIVER 8CH 20-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 内部开关 系列:- 其它有关文件:VND5E050AK-E View All Specifications 产品培训模块:VIPower™ M0-5 Smart Power Devices 标准包装:1,000 系列:VIPower™ 类型:高端 输入类型:非反相 输出数:2 导通状态电阻:50 毫欧 电流 - 输出 / 通道:19A 电流 - 峰值输出:27A 电源电压:4.5 V ~ 28 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:24-SOP（0.295"，7.50mm 宽）裸露焊盘 供应商设备封装:PowerSSO-24 包装:带卷 (TR) 其它名称:497-11699-2VND5E050AKTR-E-ND |
| UDN2987X-6 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DABIC-5 8-Channel Source Driver with Overcurrent Protection |
| UDN2993 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DUAL H-BRIDGE MOTOR DRIVERS |
| UDN2993B | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DUAL H-BRIDGE MOTOR DRIVERS |
| UDN-2993B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC Motor Controller/Driver |
发布紧急采购，3分钟左右您将得到回复。