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參數(shù)資料
| 型號： | 908E425 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)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 |
| 文件頁數(shù)： | 15/49頁 |
| 文件大?。?/td> | 490K |
| 代理商： | 908E425 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
15
908E425
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
CURRENT LIMITATION FREQUENCY INPUT PIN
(FGEN)
Input pin for the half-bridge current limitation and the high-
side inrush current limiter PWM frequency. This input is not a
real PWM input pin; it should just supply the period of the
PWM. The duty cycle will be generate automatically.
Important
The recommended FGEN frequency should
be in the range of 0.1 kHz to 20 kHz.
BACK ELECTROMAGNETIC FORCE OUTPUT PIN
(BEMF)
This pin gives the user information about back
electromagnetic force (BEMF). This feature is mainly used in
step motor applications for detecting a stalled motor. In order
to evaluate this signal the pin must be directly connected to
pin PTD0 / TACH0 BEMF.
RESET PIN (RST_A)
RST_A
is the bidirectional reset pin of the analog die. It is
an open drain with pull-up resistor and must be connected to
the
RST
pin of the MCU.
INTERRUPT PIN (IRQ_A)
IRQ_A
is the interrupt output pin of the analog die
indicating errors or wake-up events. It is an open drain with
pull-up resistor and must be connected to the
IRQ
pin of the
MCU.
SLAVE SELECT PIN (SS)
This pin is the SPI Slave Select pin for the analog chip. All
other SPI connections are done internally.
SS
must be
connected to PTB1 or any other logic I O of the
microcontroller.
LIN BUS PIN (LIN)
The LIN pin represents the single-wire bus transmitter and
receiver. It is suited for automotive bus systems and is based
on the LIN bus specification.
HALF-BRIDGE OUTPUT PINS (HB1: HB4)
The 908E425 device includes power MOSFETs
configured as four half-bridge driver outputs. The HB1: HB4
outputs may be configured for step motor drivers, DC motor
drivers, or as high-side and low-side switches.
The HB1: HB4 outputs are short-circuit and
overtemperature protected, and they feature current recopy,
current limitation, and BEMF generation. Current limitation
and recopy are done on the low-side MOSFETs.
POWER SUPPLY PINS (VSUP1: VSUP3)
VSUP1: VSUP3 are device power supply pins. The
nominal input voltage is designed for operation from 12 V
systems. Owing to the low ON-resistance and current
requirements of the half-bridge driver outputs and high-side
output driver, multiple VSUP pins are provided.
All VSUP pins must be connected to get full chip
functionality.
POWER GROUND PINS (GND1 AND GND2)
GND1 and GND2 are device power ground connections.
Owing to the low ON-resistance and current requirements of
the half-bridge driver outputs and high-side output driver,
multiple pins are provided.
GND1 and GND2 pins must be connected to get full chip
functionality.
HIGH-SIDE OUTPUT PIN (HS)
The HS output pin is a low R
DS(ON)
high-side switch. The
switch is protected against overtemperature and overcurrent.
The output is capable of limiting the inrush current with an
automatic PWM generation using the FGEN module.
SWITCHABLE VDD OUTPUT PIN (HVDD)
The HVDD pin is a switchable V
DD
output for driving
resistive loads requiring a regulated 5.0 V supply; e.g., 3-pin
Hall-effect sensors. The output is short-circuit protected.
HALL-EFFECT SENSOR INPUT PINS (H1: H3)
The Hall-effect sensor input pins H1: H3 provide inputs for
Hall-effect sensors and switches.
+ 5.0 V VOLTAGE REGULATOR OUTPUT PIN (VDD)
The VDD pin is needed to place an external capacitor to
stabilize the regulated output voltage. The VDD pin is
intended to supply the embedded microcontroller.
Important
The VDD pin should not be used to supply
other loads; use the HVDD pin for this purpose. The VDD,
EVDD, VDDA, and VREFH pins must be connected together.
ANALOG INPUT PIN (PA1)
This pin is an analog input port with selectable current
source values.
VOLTAGE REGULATOR GROUND PIN (VSS)
The VSS pin is the ground pin for the connection of all non-
power ground connections (microcontroller and sensors).
Important
VSS, EVSS, VSSA, and VREFL pins must be
connected together.
LIN TRANSCEIVER OUTPUT PIN (RXD)
This pin is the output of LIN transceiver. The pin must be
connected to the microcontroller’s Enhanced Serial
Communications Interface (ESCI) module (RXD pin).
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| 908E621 | 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 |
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