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| 型号： | MCZ33812EK |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 17/25页 |
| 文件大小： | 0K |
| 描述： | IC DVR IGNITION/INJECTOR 32-SOIC |
| 标准包装： | 42 |
| 应用： | 自动 |
| 电流 - 电源： | 10mA |
| 电源电压： | 4.7 V ~ 36 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-BSOP（0.295"，7.50mm 宽）裸露焊盘 |
| 供应商设备封装： | 32-SOICW 裸露焊盘 |
| 包装： | 管件 |
FUNCTIONAL DEVICE OPERATION
LAMP DRIVER OPERATION
LAMP DRIVER OPERATION
The Lamp Driver is a low side driver that is controlled by
the logic level LAMPIN input pin. When LAMPIN is high, the
LAMP pin is pulled to ground, turning on an external bulb or
LED. When LAMPIN is low, the bulb or LED pulls the LAMP
output to V BAT , and the lamp is turned off.
LAMPOUT Protection Features
Over-current (I OUT-LIM-LAMP )
The LAMPOUT Driver protection scheme uses three
separate protection schemes to prevent damage to the
output device.
The first protection scheme is deployed when an over-
current event occurs. In this case the current limiting circuitry
will attempt to limit the maximum current flow to the specified
I OUT LIM-LAMP value.
Short to Battery
protection circuitry will, after the short detection filter time,
turn off the output driver.
There will be an internal retry timer to try to turn on again
if the fault clears.
There is no annunciation of any LAMPOUT faults.
Temperature Limit (T LIM )
The third protection scheme deals with the junction
temperature of the output device. Any time the maximum
temperature limit on the output device is exceeded ( T LIM ), the
device will shutdown until the junction temperature falls below
this maximum temperature minus the hysteresis temperature
value. The T LIM hysteresis value is T LIM(HYST) .
The maximum temperature ( T LIM ) protection scheme
controls the output device regardless of the state of the
LAMPIN input. The device is unable to be activated until the
junction temperature falls below this maximum temperature
minus the hysteresis temperature value.
The second protection scheme is invoked when the over-
current fault is due to a hard short to battery. In this case, the
LAMPOUT FAULT DETECTION FEATURES
Off State, Open Load Detection
Since there is no way to annunciate an open load fault for the
lamp output driver, no open load fault detection is performed
by the 33812.
performed by the 33812 as part of the protection for the
output FET.
The LAMPOUT driver also has an over-current blanking
time of t OC(BLANK) to allow for incandescent lamp inrush
current
On State, Shorted Load Detection
Even though there is no way to annunciate a shorted load
fault for the lamp output driver, shorted fault detection is
OVER/UNDER-VOLTAGE SHUTDOWN STRATEGY
How the outputs behave after an over-voltage or under-
Table 3. Over-voltage/Under-voltage Truth Table
voltage event on VPWR is listed in Table 3 below:
Output
INJOUT
IGNOUT
ROUT
ROUT
LAMPOUT
LAMPOUT
State
Before OV
or UV
X
X
OFF
ON
OFF
ON
State When
Returning From
Over-voltage
OFF
OFF
OFF
ON
OFF
ON
State When
Returning From
Under-voltage
OFF
OFF
OFF
OFF
OFF
OFF
33812
Analog Integrated Circuit Device Data
Freescale Semiconductor
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCZ33812EK/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Multifunctional Ignition and Injector Driver |
| MCZ33812EKR2 | 功能描述:马达/运动/点火控制器和驱动器 MULTIFUNC IGN, INJ DRVR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MCZ33879AEK | 功能描述:电源开关 IC - 配电 CONFIG OCTAL SERIAL SW RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MCZ33879AEK/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Configurable Octal Serial Switch with Open Load Detect Current Disable |
| MCZ33879AEKR2 | 功能描述:电源开关 IC - 配电 CONFIG OCTAL SERIAL SW RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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