參數(shù)資料
型號(hào)： 908E425
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication
中文描述： 綜合四半僅符合電源橋，嵌入式微控制器和LIN串行通信
文件頁(yè)數(shù)： 33/49頁(yè)
文件大?。?/td> 490K
代理商： 908E425
Analog Integrated Circuit Device Data
Freescale Semiconductor
33
908E425
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Figure 20. BEMF Signal Generation
HALF-BRIDGE OVERTEMPERATURE
PROTECTION
The half-bridge outputs provide an overtemperature pre-
warning with the HTF in the Interrupt Flag Register (IFR). In
order to protect the outputs against overtemperature, the
High-Temperature Reset must be enabled. If this value is
reached, the part generates a reset and disables all power
outputs.
HALF-BRIDGE OVERCURRENT PROTECTION
The half-bridges are protected against short to GND, short
to VSUP, and load shorts.
In the event an overcurrent on the high side is detected,
the high-side MOSFETs on all HB high-side MOSFETs are
switched off automatically. In the event an overcurrent on the
low side is detected, all HB low-side MOSFETs are switched
off automatically. In both cases the overcurrent status flag
HB_OCF in the System Status Register (SYSSTAT) is set.
The overcurrent status flag is cleared (and the outputs re-
enabled) by writing a Logic [1] to the HB_OCF flag in the
System Status Register or by reset.
HALF-BRIDGE OVERVOLTAGE / UNDERVOLTAGE
The half-bridge outputs are protected against
undervoltage and overvoltage conditions. This protection is
done by the low- and high-voltage interrupt circuitry. If one of
these flags (LVF, HVF) is set, the outputs are automatically
disabled.
The overvoltage undervoltage status flags are cleared
(and the outputs re-enabled) by writing a Logic [1] to the LVF /
HVF flags in the Interrupt Flag Register or by reset. Clearing
this flag is useless as long as a high- or low-voltage condition
is present.
HALF-BRIDGE CONTROL REGISTER (HBCTL)
H-BRIDGE OFFSET CHOPPING ENABLE BIT (OFC_EN)
This read / write bit enables offset chopping. Reset clears
the OFC_EN bit.
1 = Offset chopping enabled
0 = Offset chopping disabled
Coil Current
Voltage on
1
1
BEMF Signal
Register Name and Address: HBCTL - $02
Bits
7
6
5
4
3
2
1
0
Read OFC_EN CSA
0
0
0
CLS2 CLS1 CLS0
Write
Reset
0
0
0
0
0
0
0
0
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908E621 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-Bridge and Triple High-Side with Embedded MCU and LIN for High End Mirror
908E621_07 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-Bridge and Triple High-Side with Embedded MCU and LIN for High End Mirror
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