- 您现在的位置：买卖IC网 > PDF目录17280 > MC33879EKR2 (Freescale Semiconductor)IC SERIAL SWITCH OCTAL 32-SOICW PDF资料下载
参数资料
| 型号： | MC33879EKR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 18/23页 |
| 文件大小： | 0K |
| 描述： | IC SERIAL SWITCH OCTAL 32-SOICW |
| 标准包装： | 1,000 |
| 类型： | 高端/低端驱动器 |
| 输入类型： | SPI |
| 输出数： | 8 |
| 导通状态电阻： | 750 毫欧 |
| 电流 - 峰值输出： | 1.2A |
| 电源电压： | 5.5 V ~ 26.5 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-SOIC 裸露焊盘 |
| 包装： | 带卷 (TR) |
FUNCTIONAL DESCRIPTION
DEVICE OPERATION
declare the load open in the OFF state when the output drain-
to-source voltage is less than V OUT(FLT-TH) .
This device has an internal 80 ? A current source
connected from drain to source of the output MOSFET. The
current source may be programmed on or off via SPI. The
Power-ON Reset state for the current source is “off” and must
be enabled via SPI. To achieve low Sleep mode quiescent
currents, the Open Load Detection Current source of each
driver is switched off when V DD or EN is removed.
During output switching, especially with capacitive loads,
output. Each clamp independently limits the drain-to-source
voltage to 45 V for low side drive configurations and -20 V for
high side drive configurations. The total energy clamped (E J )
can be calculated by multiplying the current area under the
current curve (I A ) times the clamp voltage (V CL ) (see
Characterization of the output clamps, using a single pulse
non-repetitive method at 0.35 A, indicates the maximum
energy per output to be 50 mJ at 150 ° C junction temperature.
a false output OFF open load fault may be triggered. To
prevent this false fault from being reported, an internal fault
filter of 100 ? s to 300 ? s is incorporated. A false fault
reporting is a function of the load impedance, R DS(ON) , C OUT
of the MOSFET, as well as the supply voltage, V PWR . The
rising edge of CS triggers the built-in fault delay timer. The
timer will time out before the fault comparator is enabled and
the fault is detected. Once the condition causing the open
Drain-to-Source Clamp
Voltage (V CL = 45 V)
Drain Current
(ID = 0.3 A)
Drain Voltage
Clamp Energy
(E J = I A x V CL )
load fault is removed, the device will resume normal
operation. The open load fault, however, will be latched in the
output DO register for the MCU to read.
SHORTED LOAD FAULT
A shorted load (over-current) fault can be caused by any
output being shorted directly to supply, or an output
experiencing a current greater than the current limit.
There are two safety circuits progressively in operation
during load short conditions that provide system protection:
Drain-to-Source ON
Voltage (V DS(ON) )
GND
Drain-to-Source ON
Voltage (V DS(ON) )
VS
GND
Current
Area (I A )
Current
Area (I A )
Time
BAT
Time
Clamp Energy
(E J = I A x V CL )
1. The device’s output current is monitored in an analog
fashion using SENSEFET approach and current
limited.
2. The device’s output thermal limit is sensed and when
attained causes only the specific faulted output to shut
down. The output will remain off until cooled. The
device will then reassert the output automatically. The
cycle will continue until fault is removed or the
command bit instructs the output off. Shorted load
faults will be reported properly through the SPI
regardless of Open Load Detection Current enable
bits.
UNDER-VOLTAGE SHUTDOWN
An under-voltage condition on V DD or V PWR will result in
the shutdown of all outputs. The V DD under-voltage threshold
is between 0.8 and 3.0 V. V PWR under-voltage threshold is
between 3.0 and 5.0 V. When the supplies fall below their
respective thresholds, all outputs are turned OFF. As both
supplies returns to normal levels, internal logic is reset and
the device resumes normal operation.
OUTPUT VOLTAGE CLAMP
Each output of the 33879 incorporates an internal voltage
Source Current
(I S = 0.3 A)
Source Clamp Voltage Source Voltage
(V CL = -15 V)
Figure 18. Output Voltage Clamping
SPI CONFIGURATIONS
The SPI configuration on the 33879 device is consistent
with other devices in the Octal Serial Switch (OSS) family.
This device may be used in serial SPI or parallel SPI with the
33298 and 33291. Different SPI configurations may be
provided. For more information, contact Freescale Analog
Products Division or the local Freescale representative.
REVERSE BATTERY
The 33879 has been designed with reverse battery
protection on the V PWR pin.
All outputs consist of a power MOSFET with an integral
substrate diode. During the reverse battery condition, current
will flow through the load via the substrate diode. Under this
circumstance, relays may energize and lamps will turn on.
Where load reverse battery protection is desired, a reverse
battery blocking diode must be placed in series with the load.
clamp to provide fast turn-off and transient protection of each
33879
Analog Integrated Circuit Device Data ?
18
Freescale Semiconductor
相关PDF资料 |
PDF描述 |
|---|---|
| MAX5042EVKIT | EVAL KIT FOR MAX5042 |
| 050R18-102B | CABLE FLAT FLEX 18POS 0.5MM 4" |
| MAX5066EVKIT | EVAL KIT FOR MAX5066 |
| L-14C27NJV4T | CER INDUCTOR 27NH 0603 |
| MC33385VW | IC SWITCH QUAD L-SIDE 20-HSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33879TEK | 功能描述:电源开关 IC - 配电 CONFIG OCTAL SER SWITCH 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 |
| MC33879TEKR2 | 功能描述:电源开关 IC - 配电 CONFIG OCTAL SER SWITCH 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 |
| MC33880DW | 功能描述:功率驱动器IC COSS 28LD SOIC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MC33880DWB | 功能描述:功率驱动器IC COSS 32LD SOIC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MC33880DWBR2 | 功能描述:功率驱动器IC COSS 32LD SOIC T&R RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。