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参数资料
| 型号： | MC35XS3500PNA |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 24/45页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HIGHSIDE 24PQFN |
| 标准包装： | 168 |
| 类型： | 高端开关 |
| 输出数： | 5 |
| Rds（开）： | * |
| 内部开关： | 是 |
| 电流限制： | 9A |
| 输入电压： | 7 V ~ 20 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-PowerQFN |
| 供应商设备封装： | 24-PQFN（12x12） |
| 包装： | 托盘 |
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FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Autorestart Strategy
The autorestart circuitry is used to supervise the outputs
and reactivate high side switches in case of overload or
under-voltage failure conditions, and provide a high
availability of the outputs.
This autorestart is available in Fail mode when no
supervising intelligence of the microcontroller is available.
Autorestart is activated in case of an overload condition
The autorestart switches ON the outputs. During the ON
state of the switch OCHI1, the window is enabled for
tochi_Auto, then after the output is protected by OCLO.
Output current
The Autorestart is not limited in time.
Transition Fail to Normal Mode
To leave the Fail mode, the fail condition must be removed
(fail=0). The microcontroller has to toggle the SPI D10 bit (0
to 1) to reset to the watchdog bit; the other bits are not
considered. The previous latched faults are reset by the
transition into Normal mode.
Transition Normal to Fail Mode
To leave the Normal mode, a fail condition must occur
(fail=1). The previous latched faults are reset by the transition
into Fail mode.
If the SI is shorted to VCC, the device transmits to Fail
Safe mode until the WD bit toggles through the SPI (from [0]
to [1]).
All settings are according to predefined values (all bits set
to logic [0]).
OCHI1
START-UP SEQUENCE
OCLO
OCLO or UV fault
The 35XS3500 enters into Normal mode after start-up if
the following sequence is provided:
? V BAT and V CC power supplies must be above their
under-voltage thresholds (Sleep mode).
? Generate a wake-up event (wake=1) from 0 to 1 on
RST. The device switches to Normal mode.
tochi_auto
Auto period
time
? Apply the PWM clock after a maximum of 200 ? s (min.
50 ? s).
? Send a SPI command to the device status register to
Figure 9. Over-current window in case of Autorestart
In case of OCHI1 or OT, the switch is latched OFF until
wake up (wake=0, then 1).
In case of OCLO or under-voltage, the output switch is
OFF. After the autorestart period (75 ms) is turned ON again.
In case an under-voltage occurred in Fail mode, it will be
latched and delatched after the auto restart period
(t AUTORST ).
clear the clock fail flag and enable the PWM module to
start.
If the correct startup sequence is not provided, the PWM
function is not guaranteed.
Figure 10 describes the wake-up block diagram.
POWER OFF MODE
The 35XS3500 is in Power OFF mode when the battery
voltage is below V BATPOR[1,2] thresholds. For more details,
please refer to Loss of VBAT paragraph.
35XS3500
Analog Integrated Circuit Device Data ?
24
Freescale Semiconductor
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