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參數(shù)資料
| 型號： | L6377 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 0.5A High-Side Driver Intelligent Power Switch(0.5A高邊驅(qū)動(dòng)器智能功率開關(guān)) |
| 中文描述： | 0.5A的高邊驅(qū)動(dòng)器智能功率開關(guān)（0.5A的高邊驅(qū)動(dòng)器智能功率開關(guān)） |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 91K |
| 代理商： | L6377 |
I
NPUT SECTION
An
Input
TTL/CMOS compatible with wide voltage range
and high noise immunity (thanks to a built in hys-
teresis) are available.
and
Asynchronous RESET,
both
OVER TEMPERATURE PROTECTION (OVT)
An on-chip Over Temperature Protectionprovidse
an excellent protection of the device in extreme
conditions. Whenever the temperature - meas-
ured on a central portion of the chip- exceeds
Tmax=150 C (typical value) the device is shut off,
and the DIAG output goes LOW.
Normal operation is resumed as the chip tem-
perature (normally after few seconds) falls below
Tmax-Thys= 130 C (typical value). The hysteresis
avoid thats an intermittent behaviourtake place.
UNDER VOLTAGEPROTECTION (UV)
The supply voltage is expectedto range from 8 to
35 V. In this range the device operates correctly.
Below 8 V the overall system has to be consid-
ered not reliable. To avoid any misfunctioningthe
supply voltage is continuously monitored to pro-
vide an under voltage protection. As Vs falls be-
low Vsth-Vshys (typically 7.5 V, see
output power MOS is switched off and DIAG out-
put goes LOW. Normal operation is resumed as
soon as Vs exceeds Vsth. The hysteretic behav-
iour prevents intermittent operation at low supply
voltage.
fig.1) the
OVERCURRENT OPERATION
In order to implement a short circuit protectionthe
output power MOS is driven in linearmode to limit
the output current to the Isc value. This Isc limit is
externallysettable by means of an external1/4 W
resistor connected from Rsc pin and GND. The
value of the resistor must be chosen according to
the followingformula:
Isc (A) = 5/Rsc (kohm)
with
5 < Rsc < 30 (kohm)
For
Rsc< 5 (kohm)
Isc is limited to Isc=1.1 A (typical value).
This condition (current limited to the Isc value)
lasts for a Ton time interval, that can be set by
means of a capacitor(Cdon) connectedto the ON
DELAY pin according to the following formula:
Ton
= 1.28 msec/pF
for
50pF<Cdon<2nF
After the Ton interval has expired the output
power MOS is switched off for the Toff time inter-
val with:
Toff = 64*Ton.
OUTPUT
CURRENT
t
ON
t
ON
t
OFF
t
OFF
Time
t<t
ON
DIAG
(active low)
Time
Short Circuit
Short Circuit
Isc
Iout
D94IN105
Figure 3:
ShortCircuit OperationWaveforms
L6377
6/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6377_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:0.5 A high-side driver quad intelligent power switch |
| L6377D | 功能描述:電源開關(guān) IC - 配電 0.5A Intel Power Sw RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| L6377D013TR | 功能描述:電源開關(guān) IC - 配電 0.5A Intel Power Sw RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| L6380 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L6381 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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