- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383737 > PC33975AR2 (飛思卡爾半導(dǎo)體(中國)有限公司) Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current PDF資料下載
參數(shù)資料
| 型號： | PC33975AR2 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current |
| 中文描述： | 多交換檢測接口，具有抑制喚醒和32毫安濕電流 |
| 文件頁數(shù)： | 24/32頁 |
| 文件大?。?/td> | 641K |
| 代理商： | PC33975AR2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
Analog Integrated Circuit Device Data
Freescale Semiconductor
24
33975
TYPICAL APPLICATIONS
OPERATIONAL MODES
Figure 14. MOSFET or LED Driver Output
The sequence of commands (from Normal mode with
inputs tri-state) required to set up the device to drive a
MOSFET are as follows:
wetting current timer enable command
–Disable SPn
wetting current timer (refer to
Table 9
, page
16
).
metallic command
–Set SPn to 16/32 mA or 2.0/4.0 mA
gate drive current (refer to
Table 8
, page
15
).
settings command
–Set SPn as switch-to-battery (refer
to
Table 6
, page
14
).
tri-state command
–Disable tri-state for SPn (refer to
Table 10
, page
16
).
After the
tri-state command
has been sent (tri-state
disable), the MOSFET gate will be pulled to ground. From this
point forward the MOSFET may be turned on and off by
sending the
settings command
:
settings command
–SPn as switch-to-ground
(MOSFET ON).
settings command
–SPn as switch-to-battery
(MOSFET OFF).
Monitoring of the MOSFET drain in the OFF state provides
open load detection. This is done by using an input
comparator. With the SGn input in tri-state, the load will pull
up the input to battery. With the load open, the SGn terminal
is pulled down to ground through an external resistor. The
open load is indicated by a logic [1] in the SO data bit.
The
analog command
may be used to monitor the drain
voltage in the MOSFET ON state. By sourcing 4.0 mA of
current to the 750
resistor, the analog voltage on the SGn
terminal will be approximately:
As the voltage on the drain of the MOSFET increases, so
does the voltage on the SGn terminal. With the SGn terminal
selected as analog, the MCU may perform the A/D
conversion.
Using this method for controlling unclamped inductive
loads is not recommended. Inductive fly-back voltages
greater than V
PWR
may damage the IC.
The SP0–SP7 terminals of this device may also be used
to send signals from one module to another. Operation is
similar to the gate control of a MOSFET.
For LED applications a resistor in series with the LED is
recommended but not required. The switch-to-ground inputs
are recommended for LED application. To drive the LED use
the following commands:
wetting current timer enable command
–Disable SGn
wetting current timer.
metallic command
–Set SGn to 32 mA.
From this point forward the LED may be turned on and off
using the
tri-state command
:
tri-state command
–Disable tri-state for SGn (LED ON).
tri-state command
–Enable tri-state for SGn (LED
OFF).
These parameters are easily programmed via SPI
commands in Normal mode.
Multiple 33975 Devices in a Module System
Connecting power to the 33975 and the MCU for Sleep
mode operation may be done in several ways.
Table 21
shows several system configurations for power between the
MCU and the 33975 and their specific requirements for
functionality.
SP0
SG0
SG13
32
mA
4.0
mA
4.0 V Ref
+
-
Comparator
To SPI
V
PWR
SG0
750
L
VBAT
AMUX
100 k
V
PWR
+
-
Comparator
2.0 mA
To SPI
4.0 V
Ref
4.0
mA
16
mA
32
mA
V
PWR
V
PWR
SG0
32
mA
4.0
mA
V
PWR
V
PWR
+
-
Comparator
To SPI
4.0 V Ref
SG13
Table 21. Sleep Mode Power Supply
MCU
VDD
33975
VDD
Comments
5.0 V
5.0 V
All wake-up conditions apply. (Refer to
Sleep
Mode
, page
20
.)
5.0 V
0 V
SPI wake-up is not possible.
0 V
5.0 V
Sleep mode not possible. Current from
CS
pull
up will flow through MCU to VDD that has been
switched off. Negative edge of
CS
will put 33975
in Normal mode.
0 V
0 V
SPI wake-up is not possible.
V
SGn
= I
SGn
x 750
+ V
DS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PC3S12XEP100J1CAA | Microcontrollers |
| PC3S12XEP100J1CAAR | Microcontrollers |
| PC3S12XEP100J1CAG | Microcontrollers |
| PC3S12XEP100J1CAGR | Microcontrollers |
| PC3S12XEP100J1CAL | Microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PC33981PNA/R2 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High-Frequency, High-Current, Self-Protected High-Side Switch (4.0 mз up to 60 kHz) |
| PC33984CHFKR2 | 制造商:Freescale Semiconductor 功能描述: |
| PC33989DW | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:System Basis Chip with High Speed CAN Transceiver |
| PC33991DH | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Gauge Driver Integrated Circuit |
| PC33991DH/R2 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Gauge Driver Integrated Circuit |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。