OPERATIONAL MODES High Side Over-voltage /" />
參數(shù)資料
型號(hào)： MM908E621ACDWB
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 33/60頁(yè)
文件大小： 0K
描述： IC QUAD HALF BRDG TRPL SW 54SOIC
標(biāo)準(zhǔn)包裝： 26
應(yīng)用： 自動(dòng)鏡像控制
核心處理器： HC08
程序存儲(chǔ)器類型： 閃存（16 kB）
控制器系列： 908E
RAM 容量： 512 x 8
接口： SCI，SPI
輸入/輸出數(shù)： 12
電源電壓： 9 V ~ 16 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 54-BSSOP（0.295"，7.50mm 寬）裸露焊盤
包裝： 管件
供應(yīng)商設(shè)備封裝： 54-SOICW-EP
Analog Integrated Circuit Device Data
Freescale Semiconductor
39
908E621
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
High Side Over-voltage / Under-voltage Protection
The outputs are protected against under /over-voltage
conditions. This protection is done by the low and high
voltage interrupt circuitry. If an over /under-voltage condition
is detected (LVIF / HVIF), and Bit VIS in the High Side Status
Register is cleared, the output is disabled.
The over /under-voltage status flags are cleared (and the
output reenabled), by writing a logic [1] to the LVIF / HVIF
flags in the Interrupt Flag Register, or by reset. Clearing this
flag has no effect as long as a high or low voltage condition
is present.
HIGH SIDE OVER-TEMPERATURE PROTECTION
The outputs are protected against over-temperature
conditions.
Each power output comprises two different temperature
thresholds.
The first threshold is the high temperature interrupt (HTI).
If the temperature reach this threshold, the HTI bit in the
interrupt flag register is set and an interrupt will be generated,
if the HTIE bit in the interrupt mask register is set. In addition,
this interrupt can be used to automatically turn off the power
stages (all high sides, on Half-bridges just the high side
FET’s). This shutdown can be enabled/disabled by the HTIS0
bit.
The high temperature interrupts flag (HTIE) is cleared (and
the outputs reenabled) by writing a logic [1] to the HTIF flag
in the Interrupt Status Register, or by reset. Clearing this flag
has no effect as long as a high temperature condition is
present.
If the HTIS shutdown is disabled, a second threshold
(HTR) will be used to turn off all power stages (HB (all Fet’s),
HS, HVDD, H0) in order to protect the device.
High Side Over-current Protection
The HS outputs are protected against over-current. When
the over-current limit is reached, the output will be
automatically switched off and the over-current flag is set.
Due to the high inrush current of bulbs, a special feature
was implemented to avoid a over-current shutdown during
this inrush current. If a PWM frequency will be supplied to the
PWM input during the switch on of a bulb, the inrush current
will be limited to the over-current shutdown limit. This means,
if the current reaches the over-current shutdown, the high
side will be switched off, but each rising edge on the PWM
input will enable the driver again. The duty cycle supplied by
the MCU has no influence on the switch-on time of the high
side driver.
In order to distinguish between a shutdown due to an
inrush current or a real shutdown, the software checks if the
over-current status flag (HSxOCF) in the High Side Status
register is set beyond a certain period of time.
Table 9. High Side Configuration Bits
HSxPWM
HSxON
Mode
0
High side MOSFET off
0
1
High side MOSFET on if over-current, the
over-current flag (HSxOCF) is set, and the
high side MOSFET is turned off
1
0
In this mode, the PWM duty cycle is either
controlled by the PWM input signal, or if
the over-current shutdown value is
reached by the part itself.
Without reaching the over-current
shutdown, the high side driver is directly
driven from the PWM input signal. If the
Input signal is high, the output is on. If low,
the output is off (PWM control).
If the current reaches the over-current
shutdown value, the high side will be
automatically turned off. With the next
rising edge of the PWM input signal, the
output will turn on again (current
limitation). The HSxOCF bit will be set.
The software has to distinguish between
an inrush current and a real short on the
output.
1
High side MOSFET is switched on and the
inrush current limitation is enabled. This
means the high side will start
automatically with a current limitation
around the over-current shutdown
threshold. (PWM signal must be applied,
If the high side enters current limitation,
the HSxOCF bit is set, but the output is not
disabled. The software needs to
distinguish between an inrush current and
a real short on the output.
相關(guān)PDF資料
PDF描述
MM908E624ACDWB IC TRPL SWITCH MCU/LIN 54-SOIC
MM908E624ACDWBR2 IC TRPL SWITCH MCU/LIN 54-SOIC
046232108015800+ CONN FFC/FPC 8POS 1MM VERT SMD
SST26VF032A-80-5I-QAE IC FLASH 32MBIT 8WSON
07FMN-BMTR-A-TB CONN FMN HOUSNG 7POS SGL REV SMD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MM908E621ACDWB/R2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-bridge and Triple High Side with Embedded MCU and LIN for High End Mirror
MM908E621ACDWBR2 功能描述:8位微控制器 -MCU QUAD HB / TRIPLE HS 841B RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MM908E621ACPEK 功能描述:8位微控制器 -MCU QUAD H-B/3-HS W/MCU & LI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MM908E621ACPEKR2 功能描述:8位微控制器 -MCU QUAD HB AND TRIPLE HS RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MM908E622 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-Bridge, Triple High-Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*