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參數(shù)資料
| 型號： | MC33797 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Four Channel Squib Driver IC |
| 中文描述： | 四通道爆管驅(qū)動(dòng)IC |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 639K |
| 代理商： | MC33797 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
25
33797
FUNCTIONAL DESCRIPTION
PROTECTION AND DIAGNOSIS FEATURES
PROTECTION AND DIAGNOSIS FEATURES
The diagnostic circuit’s internal references are provided by
a bandgap voltage reference, and by scaled currents
determined by the resistor value of R_DIAG and the value of
the bandgap voltage. Refer to Table 7, Diagnostic Bit
Diagnostic Bit Definitions, as necessary throughout this
section.
R_DIAG and R_LIMIT_X RESISTOR DIAGNOSTICS
($C8 COMMAND)
This function monitors reference currents derived by the
R_LIMIT_1, R_LIMIT_2, and R_DIAG resistors. An open
terminal or short to ground will cause the comparator to give
an “out of range resistor value” indication. A short to VDD will
have the same effect as an open terminal and will cause an
“out of range resistor value” indication.
R_LIMIT_X and R_DIAG DATA RESULTS
If R_LIMIT_X is open, shorted to ground, or shorted to
VDD, the bit R_LIMIT_NO_FAULT will be set to “0”. Standard
operation will have this bit set to “1”.
If R_DIAG is open, shorted to ground, or shorted to VDD,
the bit R_DIAG_NO_FAULT will be set to “0”. Standard
operation will have this bit set to “1”.
The FEN 1 and FEN 2 status bits are a reflection of the
FEN_1 and FEN_2 terminals.
HIGH-SIDE SAFING SENSOR DIAGNOSTICS
($C0 COMMAND)
This function monitors the VFIRE_XX terminal connection
to the VDIAG_X terminal. The high-side safing function is
attached to the VFIRE _1A and VFIRE_2A terminals. The
high-side safing function is not available on the VFIRE _1B
and VFIRE_2B terminals.
When enabled, this diagnostic circuit will typically draw
less than 500 A from the VFIRE supply voltage source.
Internal window comparators will monitor the voltage
difference between the VDIAG_X terminal and the
VFIRE_XX terminal, and will provide two bits of data to
indicate if the terminal voltage is either above (open) or below
(shorted) the threshold levels.
When using a high-side safing sensor, typical 5.1 k
reference resistor must be placed across the sensor to
provide a current path for the diagnostic circuit. As long as
there is a current path and the safing sensor switch is open,
the resulting differential voltage will fall between the
comparator thresholds so that neither an open fault nor a
shorted fault condition will be indicated. A closed safing
sensor will be indicated as a short, and a loss of the
connection between the VDIAG_X terminal and the
VFIRE_XX terminal will be indicated as an open. Any
external capacitance on the VFIRE_XX terminal will affect
the time needed to settle to an accurate value.
90
Reserved for
Freescale
Read NVM Low
X
91
Reserved for
Freescale
Read NVM High
X
92
Reserved for
Freescale
NVM Enable
X
93
Reserved for
Freescale
Test Mode Enable
X
96
SPI Integrity Check
1
0
1
0
1
0
Response DATA
OUT: $69 Echo to
Diagnose the SPI
Integrity
0
1
0
1
0
1
Notes
24.
The second byte for command programming will be treated as a NOP if any FET is firing. The programming commands have to be
sequential or they will be treated as a NOP.
Table 8. Command Programming and Diagnostic Bit Definitions (continued)
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| MC33797BPEWR2 | 功能描述:功率驅(qū)動(dòng)器IC Four Channel Squib Dr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MC33813AE | 功能描述:功率驅(qū)動(dòng)器IC 1 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MC33813AER2 | 功能描述:功率驅(qū)動(dòng)器IC 1 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MC33814AE | 功能描述:功率驅(qū)動(dòng)器IC 2 CYL SM ENG CONTROL IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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