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參數(shù)資料
| 型號(hào)： | MCZ33887EK |
| 廠商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 英文描述： | 5.0 A H-Bridge with Load Current Feedback |
| 中文描述： | 5.0的H -橋的負(fù)載電流反饋 |
| 文件頁(yè)數(shù)： | 24/37頁(yè) |
| 文件大?。?/td> | 524K |
| 代理商： | MCZ33887EK |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
24
33887
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
PROTECTION AND DIAGNOSTIC FEATURES
SHORT CIRCUIT PROTECTION
If an output short circuit condition is detected, the power
outputs tri-state (latch-OFF) independent of the input (IN1
and IN2) states, and the fault status output flag is SET logic
LOW. If the D1 input changes from logic HIGH to logic LOW,
or if the
D2
input changes from logic LOW to logic HIGH, the
output bridge will become operational again and the fault
status flag will be reset (cleared) to a logic HIGH state.
The output stage will always switch into the mode defined
by the input pins (IN1, IN2, D1, and
D2
), provided the device
junction temperature is within the specified operating
temperature range.
ACTIVE CURRENT LIMITING
The maximum current flow under normal operating
conditions is internally limited to I
LIM
(5.2 A to 7.8 A). When
the maximum current value is reached, the output stages are
tri-stated for a fixed time (t
a
) of 20
μ
s typical. Depending on
the time constant associated with the load characteristics, the
current decreases during the tri-state duration until the next
output ON cycle occurs (see
Figures 11
and
14
, page
13
and
page
15
, respectively).
The current limiting threshold value is dependent upon the
device junction temperature. When -40
°
C
≤
T
J
≤
160
°
C, I
LIM
is between 5.2 A to 7.8 A. When T
J
exceeds 160
°
C, the
I
LIM
current decreases linearly down to 4.0 A typical at 175
°
C.
Above 175
°
C the device overtemperature circuit detects T
LIM
and overtemperature shutdown occurs (see
Figure 9
,
page
12
). This feature allows the device to remain
operational for a longer time but at a regressing output
performance level at junction temperatures above 160
°
C.
Output Avalanche Protection
An inductive fly-back event, namely when the outputs are
suddenly disabled and V+ is lost, could result in electrical
overstress of the drivers. To prevent this the V+ input to the
33887 should not exceed the maximum rating during a fly-
back condition. This may be done with either a zener clamp
and/or an appropriately valued input capacitor with
sufficiently low ESR.
OVERTEMPERATURE SHUTDOWN AND
HYSTERESIS
If an overtemperature condition occurs, the power outputs
are tri-stated (latched-OFF) and the fault status flag is SET to
logic LOW.
To reset from this condition, D1 must change from logic
HIGH to logic LOW, or
D2
must change from logic LOW to
logic HIGH. When reset, the output stage switches ON again,
provided that the junction temperature is now below the
overtemperature threshold limit minus the hysteresis.
Note
Resetting from the fault condition will clear the fault
status flag.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ33887EKR2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 H-BRIDGE W/LD CUR FDBK RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MCZ33887EKR2DH | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:5.0 A H-Bridge with Load Current Feedback |
| MCZ33889BEG | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-LITE-LS-CAN RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33889BEG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33889BEG/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:System Basis Chip with Low Speed Fault Tolerant CAN Interface |
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