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| 型号： | MC33981BPNAR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 16/40页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HI SIDE SINGLE 16-PQFN |
| 标准包装： | 1,200 |
| 类型： | 高端 |
| 输入类型： | PWM |
| 输出数： | 1 |
| 导通状态电阻： | 4 毫欧 |
| 电源电压： | 6 V ~ 27 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-PowerDFN |
| 供应商设备封装： | 16-PQFN（12x12） |
| 包装： | 带卷 (TR) |
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FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
The 33981 has 2 operating modes: Sleep and Normal
depending on EN input.
SLEEP MODE
Sleep Mode is the state of the 33981 when the EN is
logic [0]. In this mode, OUT, the gate driver for the external
MOSFET, and all unused internal circuitry are off to minimize
current draw.
Table 6. Operating Modes
NORMAL MODE
The 33981 will go to the Normal operating mode when the
EN pin is logic [1]. The INHS and INLS commands will be
disabled t ON after the EN transitions to logic [1] to enable the
charge of the bootstrap capacitor.
Condition
CONF INHS
INLS
OUT
GLS
FS
EN
Comments
Sleep
Normal
x
L
x
H
x
H
x
H
x
H
H
H
L
H
Device is in Sleep Mode. The OUT and low side gate are OFF.
Normal mode. High side and low side are controlled
independently. The high side and the low side are both on.
Normal
L
L
L
L
L
H
H
Normal mode. High side and low side are controlled
independently. The high side and the low side are both off.
Normal
L
L
H
L
H
H
H
Normal mode. Half-bridge configuration. The high side is off
and the low side is on.
Normal
L
H
L
H
L
H
H
Normal mode. Half-bridge configuration. The high side is on
and the low side is off.
Normal
H
PWM
H
PWM
PWM_bar
H
H
Normal mode. Cross-conduction management is activated.
Half-bridge configuration.
H = High level ?
L = Low level ?
x = Don’t care ?
PWM_bar = Opposite of pulse-width modulation signal.
PROTECTION AND DIAGNOSTIC FEATURES
UNDER-VOLTAGE
The 33981 incorporates under-voltage protection. In case
of V PWR < V PWR(UV) , the OUT is switched OFF until the power
supply rises to V PWR(UV) + V PWR(UVHYS) . The latched fault are
reset below V PWR(UV) . The FS output pin reports the under-
voltage fault in real time.
OVER-TEMPERATURE FAULT
The 33981 incorporates over-temperature detection and
shutdown circuitry on OUT. Over-temperature detection also
protects the low side gate driver (GLS pin). Over-temperature
detection occurs when OUT is in the ON or OFF state and
GLS is at high or low level.
For OUT, an over-temperature fault condition results in
OUT turning OFF until the temperature falls below T SD . This
cycle will continue indefinitely until the offending load is
removed. Figure 12 and Figure 18 show an over-temperature
on OUT.
An over-temperature fault on the low side gate drive
results in OUT turning OFF and the GLS going to 0V until the
temperature falls below T SD . This cycle will continue until the
offending load is removed. FS pin transition to logic [1] will be
disabled typically t ON after to enable the charge of the
bootstrap capacitor.
Over-temperature faults force the TEMP pin to 0 V.
OVER-CURRENT FAULT ON HIGH SIDE
The OUT pin has an over-current high-detection level
called I OCH for maximum device protection. If at any time the
current reaches this level, OUT will stay OFF and the CSNS
pin will go to 0V. The OUT pin is reset (and the fault is
delatched) by a logic [0] at the INHS pin for at least t RST(DIAG) .
When INHS goes to 0 V, CSNS goes to 5.0 V.
In Figure 15 , the OUT pin is short-circuited to 0V. When
the current reaches I OCH , OUT is turned OFF within t OCH
owing to internal logic circuit.
OVER-LOAD FAULT ON LOW SIDE
This fault detection is active when INLS is logic [1]. Low
side overload protection does not measure the current
33981
Analog Integrated Circuit Device Data ?
16
Freescale Semiconductor
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| MC33982BPNAR2 | 功能描述:电源开关 IC - 配电 SPSS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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| MC33982CPNA | 制造商:Freescale Semiconductor 功能描述: |
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