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參數(shù)資料
| 型號(hào)： | SC1301AISKTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | 2A High Speed Low-Side MOSFET Driver in SOT-23 |
| 中文描述： | 2A條高速低側(cè)MOSFET驅(qū)動(dòng)器采用SOT - 23 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 168K |
| 代理商： | SC1301AISKTRT |
5
2007 Semtech Corp.
www.semtech.com
SC1301A/B
POWER MANAGEMENT
Applications Information
The SC1301A/B is a high speed, high peak current
MOSFET driver. It is designed to drive power MOSFETs
with ultra-low rise/fall time and propagation delays. As
the switching frequency of PWM controllers is increased
to reduce power converters volume and cost, fast rise
and fall times are necessary to minimize switching losses.
While discrete solutions can achieve reasonable drive
capability, implementing delay and other housekeeping
functions necessary for safe operation can become
cumbersome and costly. The SC1031A/B presents a total
solution for the high-speed, high power density
applications. A wide input supply range of 4.5V - 16.5V
allows operation in battery powered applications as well
as distributed power systems.
Supply Bypass and Layout
A 4.7μF to 10μF tantalum bypass capacitor with low ESR
(equivalent series resistance) and an additional 0.1μF
ceramic capacitor in parallel are recommended to con-
trol switching and supply transients. Low ESR (equiva-
lent series resistance) metalized film capacitors may also
be used. As with any high speed, high current circuit,
proper layout is critical in achieving optimum performance
of the SC1301A/B. Attention should be paid to the
proper placement of the driver, the switching MOSFET
and the bypass capacitors.
The driver should be placed as close as possible to elimi-
nate the possibility of oscillation caused by trace induc-
tance and the MOSFET gate capacitance. A resistor in
the range of 10
could be used in series with the gate
drive to damp the ringing if the drive output path is not
short enough. The bypass capacitors should be also
placed closely between Vcc and GND of the driver. A
Schottky diode may be connected between the ground
and the output pin to avoid latch-up in some applica-
tions.
Drive Capability and Power Dissipation
The SC1301A/B is able to deliver 2A peak current typi-
cally for driving a capacitive load, such as a MOSFET.
This high peak current will charge the input capacitance
of the device to turn on quickly. A similar amount of cur-
rent is needed to discharge the capacitance to ground
to turn the device off.
Using the SC1301A/B for fast switching actions, such as
turning on or turning off the capacitive load will signifi-
cantly reduce the device switching loss for high frequency
applications. Accordingly, the thermal stress and reliabil-
ity of the device can be improved.
Due to the non-linear characteristics of the input capaci-
tance of a device, the test load for the SC1301A/B is a
capacitor. Thus, the power from the bias power supply
can be calculated based on this setup. The energy, which
is required to charge the capacitor for turning on pro-
cess, is calculated by:
2
on
V
C
2
1
E
=
where, C is the load capacitance and V is the voltage
applied to the driver.
During the turning off process, the same amount of en-
ergy will be dissipated in the resistive elements in the
gate drive. Therefore, the energy for one switching ac-
tion (one turning on and one turning off) will be as
follows:
2
total
V
C
E
=
The power dissipation due to the gate driving switching is
calculated by:
2
gate
V
C
f
P
=
where, f is switching frequency for a given application.
Below is an example to calculate the power dissipation
for the given application.
With V
= 12V, C = 1nF and f = 200kHz, the power loss
for the gate switching actions will be as:
(
) (
) ( )
12
mW
29
nF
1
kHz
200
P
2
gate
=
=
The power supply current will be:
mA
4
V
12
mW
29
V
P
I
CC
gate
=
=
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC1301B | 2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1301BISKTR | 2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1301BISKTRT | 2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1302A | Dual High Speed Low-Side MOSFET Driver |
| SC1302AIMSTRT | Dual High Speed Low-Side MOSFET Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1301AISKTRT-CUT TAPE | 制造商:SEMTECH 功能描述:SC Series 2 A 16.5 V Surface Mount High-Speed Low-Side MOSFET Driver - SOT-23-5 |
| SC1301B | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1301BISKTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1301BISKTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:2A High Speed Low-Side MOSFET Driver in SOT-23 |
| SC1302A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual High Speed Low-Side MOSFET Driver |
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