- 您现在的位置：买卖IC网 > PDF目录1851 > MC33984BPNAR2 (Freescale Semiconductor)IC SWITCH HI SIDE DUAL 16-PQFN PDF资料下载
参数资料
| 型号： | MC33984BPNAR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 21/39页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HI SIDE DUAL 16-PQFN |
| 标准包装： | 1,200 |
| 类型： | 高端 |
| 输入类型： | SPI |
| 输出数： | 2 |
| 导通状态电阻： | 4 毫欧 |
| 电源电压： | 6 V ~ 27 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-PowerDFN |
| 供应商设备封装： | 16-PQFN（12x12） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页当前第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSIS FEATURES
this state, the watchdog, over-voltage, over-temperature, and
over-current circuitry are fully operational with default values.
FAULT MODE
The 33984 indicates the following faults as they occur by
driving the FS pin to Logic [0]:
? Over-temperature fault
? Over-voltage and under-voltage fault
The FS pin will automatically return to Logic [1] when the
fault condition is removed, except for over-current and in
some cases under-voltage.
Fault information is retained in the fault register and is
available (and reset) via the SO pin during the first valid SPI
communication (refer to Table 17 ).
? Open load fault
? Over-current fault (high and low)
PROTECTION AND DIAGNOSIS FEATURES
OVER-TEMPERATURE FAULT (NON-LATCHING)
The 33984 incorporates over-temperature detection and
shutdown circuitry in each output structure. Over-
temperature detection is enabled when an output is in the ON
state.
For the output, an over-temperature fault (OTF) condition
results in the faulted output turning OFF until the temperature
falls below the T SD(HYS) . This cycle will continue indefinitely
until action is taken by the MCU to shut OFF the output, or
until the offending load is removed.
When experiencing this fault, the OTF fault bit will be set
in the status register and cleared after either a valid SPI read
or a power reset of the device.
OVER-VOLTAGE FAULT (NON-LATCHING)
The 33984 shuts down the output during an over-voltage
fault (OVF) condition on the VPWR pin. The output remains
in the OFF state until the over-voltage condition is removed.
When experiencing this fault, the OVF fault bit is set in the bit
OD1 and cleared after either a valid SPI read or a power reset
of the device.
The over-voltage protection and diagnostic can be
disabled trough the SPI (bit OV_dis).
UNDER-VOLTAGE SHUTDOWN (LATCHING OR
NON-LATCHING)
The output(s) will latch off at some battery voltage below
6.0 V. As long as the V DD level stays within the normal
specified range, the internal logic states within the device will
be sustained.
In the case where battery voltage drops below the under-
voltage threshold (VPWRUV) output will turn off, FS will go to
Logic [0], and the fault register UVF bit will be set to 1.
Two cases need to be considered when the battery level
recovers :
? If output(s) command is (are) low, FS will go to Logic [1]
but the UVF bit will remain set to 1 until the next read
operation.
? If the output command is ON, then FS will remain at
Logic [0]. The output must be turned OFF and ON again
to re-enable the state of output and release FS . The
UVF bit will remain set to 1 until the next read operation.
The under-voltage protection can be disabled through the
SPI (bit UV_dis = 1). In this case, the FS and UVF bits do not
report any under-voltage fault condition and the output state
will not be changed as long as battery voltage does not drop
any lower than 2.5 V.
OPEN LOAD FAULT (NON-LATCHING)
The 33984 incorporates open load detection circuitry on
each output. Output open load fault (OLF) is detected and
reported as a fault condition when that output is disabled
(OFF). The open load fault is detected and latched into the
status register after the internal gate voltage is pulled low
enough to turn OFF the output. The OLF fault bit is set in the
status register. If the open load fault is removed, the status
register will be cleared after reading the register.
The open load protection can be disabled trough SPI (bit
OL_dis). It is recommended to disable the open load
detection circuitry (OL_dis bit sets to logic [1]) in case
of permanent open load fault condition.
OVER-CURRENT FAULT (LATCHING)
The device has eight programmable over-current low
detection levels (I OCL ) and two programmable over-current
high detection levels (I OCH ) for maximum device protection.
The two selectable, simultaneously active over-current
detection levels, defined by I OCH and I OCL , are illustrated in
If the load current level ever reaches the selected over-
current low detect level and the over-current condition
exceeds the programmed over-current time period (t OCx ), the
device will latch the effected output OFF.
If at any time the current reaches the selected I OCH level,
then the device will immediately latch the fault and turn OFF
the output, regardless of the selected t OCL driver.
For both cases, the device output will stay off indefinitely
until the device is commanded OFF and then ON again.
REVERSE BATTERY
The output survives the application of reverse voltage as
low as -16 V. Under these conditions, the output’s gates are
enhanced to keep the junction temperature less than 150°C.
The ON resistance of the output is fairly similar to that in the
33984
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
21
相关PDF资料 |
PDF描述 |
|---|---|
| MC33988CPNA | IC SWITCH HIGH SIDE DUAL 16QFN |
| MC33997DW | IC SWITCH 3.3/5V SUPPLY 24-SOIC |
| MC34063AD | IC REG BUCK BOOST INV 1.5A 8SOP |
| MC34063AMELG | IC REG BUCK BST INV ADJ 8SOEIAJ |
| MC34063AP | IC REG BUCK BOOST INV 1.5A 8DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33984CHFK | 功能描述:电源开关 IC - 配电 Dual 4mOhms smart 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 |
| MC33984CHFKR2 | 功能描述:电源开关 IC - 配电 Dual 4mOhms smart 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 |
| MC33984PNA | 制造商:Freescale Semiconductor 功能描述:POWER SWITCH HI SIDE 30A 16-PIN QFN - Trays |
| MC33984PNAR2 | 制造商:Freescale Semiconductor 功能描述:DUAL INTELLIGENT HIGH-CURRENT SELF-PROTECTED SILICON SWITCH - Tape and Reel |
| MC33988CHFK | 功能描述:电源开关 IC - 配电 DUAL 8MOHMS SMART 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 |
发布紧急采购，3分钟左右您将得到回复。