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參數(shù)資料
| 型號： | UDN2987A-6-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | DABIC-5 8-Channel Source Driver with Overcurrent Protection |
| 中文描述： | 達(dá)比奇- 5 8通道帶過電流保護(hù)源驅(qū)動器 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大小： | 482K |
| 代理商： | UDN2987A-6-T |
29876DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
UDN2987
x
-6
7
Applications Information and Circuit Description
As with all power integrated circuits, the UDN2987A-6 and
UDN2987LW-6 have 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 out-
put 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
shut down. The device is tested at a maximum of –350 mA
and that is the recommended maximum output current
per driver. It provides protection for current overloads or
shorted loads up to 30 V.
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 elimi-
nate errors due to manufacturing tolerances or tempera-
ture 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,
permissable current in excess of the trip current before the
output driver is turned off.
A common thermal shut down disables all outputs if the
chip temperature exceeds 165°C. At thermal shut down,
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 shut down, the FAULT open-collector output
is pulled low (turned on).
Overcurrent Fault Sense Circuit
+
–
+
–
+
–
V
S
V
REF
V
SENSE
I
LOAD
I
REF
SENSE
To Fault Latch
Matched
REF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UDN2987LW-6-T | DABIC-5 8-Channel Source Driver with Overcurrent Protection |
| UDN2987LWTR-6-T | DABIC-5 8-Channel Source Driver with Overcurrent Protection |
| UDN2987X-6 | DABIC-5 8-Channel Source Driver with Overcurrent Protection |
| UDN2987 | 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION |
| UDN2987A | 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UDN2987A-6-T | 制造商:Allegro MicroSystems 功能描述:Source Driver IC |
| UDN2987LW | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION |
| UDN2987LW-6 | 制造商:Allegro MicroSystems LLC 功能描述: |
| UDN2987LW-6-T | 功能描述:IC SOURCE DRIVER 8CHAN 20-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 內(nèi)部開關(guān) 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:高端/低端驅(qū)動器 輸入類型:SPI 輸出數(shù):8 導(dǎo)通狀態(tài)電阻:850 毫歐，1.6 歐姆 電流 - 輸出 / 通道:205mA，410mA 電流 - 峰值輸出:500mA，1A 電源電壓:9 V ~ 16 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:PG-DSO-20-45 包裝:帶卷 (TR) |
| UDN2987LWTR-6-T | 功能描述:IC SOURCE DRIVER 8CH 20-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 內(nèi)部開關(guān) 系列:- 其它有關(guān)文件:VND5E050AK-E View All Specifications 產(chǎn)品培訓(xùn)模塊:VIPower™ M0-5 Smart Power Devices 標(biāo)準(zhǔn)包裝:1,000 系列:VIPower™ 類型:高端 輸入類型:非反相 輸出數(shù):2 導(dǎo)通狀態(tài)電阻:50 毫歐 電流 - 輸出 / 通道:19A 電流 - 峰值輸出:27A 電源電壓:4.5 V ~ 28 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:24-SOP（0.295"，7.50mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:PowerSSO-24 包裝:帶卷 (TR) 其它名稱:497-11699-2VND5E050AKTR-E-ND |
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