参数资料
型号: MC33166T
厂商: ON SEMICONDUCTOR
元件分类: 稳压器
英文描述: RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述: 6 A SWITCHING REGULATOR, 81 kHz SWITCHING FREQ-MAX, PSFM5
封装: TO-220, 5 PIN
文件页数: 7/16页
文件大小: 403K
代理商: MC33166T
MC34166 MC33166
7
MOTOROLA ANALOG IC DEVICE DATA
Thermal Protection
Internal Thermal Shutdown circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated, typically at 170
°
C,
the latch is forced into a ‘reset’ state, disabling the output
switch. This feature is provided to prevent catastrophic failures
from accidental device overheating.
It is not intended to be
used as a substitute for proper heatsinking.
The MC34166
is contained in a 5–lead TO–220 type package. The tab of the
package is common with the center pin (Pin 3) and is normally
connected to ground.
DESIGN CONSIDERATIONS
Do not attempt to construct a converter on wire–wrap
or plug–in prototype boards.
Special care should be taken
to separate ground paths from signal currents and ground
paths from load currents. All high current loops should be
kept as short as possible using heavy copper runs to
minimize ringing and radiated EMI. For best operation, a tight
component layout is recommended. Capacitors CIN, CO, and
all feedback components should be placed as close to the IC
as physically possible. It is also imperative that the Schottky
diode connected to the Switch Output be located as close to
the IC as possible.
Figure 15. Low Power Standby Circuit
Figure 16. Over Voltage Shutdown Circuit
Figure 17. Soft–Start Circuit
1
5
R1
120
Error
Amp
Compensation
100
μ
A
I = Standby Mode
VShutdown = VZener + 0.7
tSoft–Start
35,000 Css
Css
D1
D2
1.0 M
Vin
1
5
R1
120
Error
Amp
Compensation
100
μ
A
1
5
R1
120
Error
Amp
Compensation
100
μ
A
+
+
+
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