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參數(shù)資料
| 型號： | L6377 |
| 廠商： | 意法半導體 |
| 英文描述： | 0.5A High-Side Driver Intelligent Power Switch(0.5A高邊驅(qū)動器智能功率開關(guān)) |
| 中文描述： | 0.5A的高邊驅(qū)動器智能功率開關(guān)（0.5A的高邊驅(qū)動器智能功率開關(guān)） |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 91K |
| 代理商： | L6377 |
When also the Toff interval has expired, the out-
put power MOS is switched ON.
Now two conditionsmay occur
- the overload is still present. In this case the out-
put power MOS is again driven in linear mode
(limiting the output current to Isc) for another Ton,
starting a new cycle, or
- the overload condition is removed, and the out-
put power MOS is no longer driven in linear
mode.
All these occurrences are presented on the DIAG
pin (see fig 2). We call this unique feature
Non
Dissipative Short Circuit Protection
and it en-
sures a very safe operation even in permanent
overload conditions. Note that, of course, choos-
ing the mostappropriatevalue for the Ton interval
(i.e. the value of the Cdon capacitor) a delay (the
Ton itself) will prevent that a misleadingShort Cir-
cuit information is presented on the DIAG output,
when driving capacitive loads (that acts like short
circuit in the very beginning) or Incandescent
Lamp (a cold filament has a very low resistive
value).
The Non Dissipative Short Circuit Protection can
be disabled (keepingTon = 0 but with the output
current still limited to Isc, and Diagnostic dis-
abled) simply shorting to ground the the ON DE-
LAY pin.
DEMAGNETISATION OF INDUCTIVE LOADS
The L6377 has an internal clamping zener diode
able to demagnetise inductive loads. Note that
the limitation comes from the peak power that the
package can handle. Attention must be paid to a
proper thermal design of the board. If, for what-
ever reason (load current or inductive value too
big) the peak power dissipation is too high, an ex-
ternal Zener plus Diode arrangement, can per-
form a demagnetisationversus Ground or versus
Vs (see fig 5 and 6). The breakdown voltage of
the external Zener Diode must be chosen consid-
ering the internal clamping voltage (Vcl) and the
supply voltage(Vs) according to:
Vz< Vcl(min)-Vs(max)
for demagnetisationversus Groundor
Vs(max)<Vz<Vcl(min)
for demagnetisationversus Vs.
Vi+
Vs
Vout
100mV
D94IN079
Vi-
100mV
Figure4:
InputComparator Hysteresis
L6377
7/11
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|---|---|
| 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 開啟時間（最大值）:400 us 關(guān)閉時間（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 開啟時間（最大值）:400 us 關(guān)閉時間（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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