IC SW PWM DC-DC 48VDC 12W 8SMD

TOP414GN

Manufacturer Part NumberTOP414GN
DescriptionIC SW PWM DC-DC 48VDC 12W 8SMD
ManufacturerPower Integrations
SeriesTOPSwitch®
TypeStep-Down (Buck), Step-Up (Boost), Flyback, Forward Converter
TOP414GN datasheet
 

Specifications of TOP414GN

Internal Switch(s)YesSynchronous RectifierNo
Number Of Outputs1Frequency - Switching120kHz
Operating Temperature-40°C ~ 125°CMounting TypeSurface Mount
Package / Case8-SMD Gull WingOutput Voltage5.8 V
Input / Supply Voltage (max)265 VACInput / Supply Voltage (min)85 VAC
Duty Cycle (max)70 %Switching Frequency120 KHz
Supply Current1.4 mAOperating Temperature Range- 40 C to + 150 C
Mounting StyleSMD/SMTLead Free Status / RoHS StatusLead free / RoHS Compliant
Current - Output-Voltage - Output-
Voltage - Input-Power - Output-
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V IN
V IN
DRAIN
0
V OUT
0
I OUT
0
1
V C
0
1
I C
0
1
Figure 6. Typical Waveforms for (1) Normal Operation, (2) Auto-restart, (3) Latching Shutdown, and (4) Power Down Reset.
CONTROL pin. V
regulation changes from shunt mode to
C
the hysteretic auto-restart mode described above. When the
fault condition is removed, the power supply output becomes
regulated, V
regulation returns to shunt mode, and normal
C
operation of the power supply resumes.
Latching Shutdown
The output overvoltage protection latch is activated by a high-
current pulse into the CONTROL pin. When set, the latch
turns off the TOPSwitch output. Activating the power-up
reset circuit by removing and restoring input power, or
momentarily pulling the CONTROL pin below the power-up
reset threshold resets the latch and allows TOPSwitch to
resume normal power supply operation. V
hysteretic mode when the power supply is latched off.
Over-Temperature Protection
Temperature protection is provided by a precision analog
circuit that turns the output MOSFET off when the junction
2
8
1
2
8
1
• • •
• • •
2
8
1
2
8
1
• • •
• • •
2
temperature exceeds the thermal shutdown temperature
(typically 145 °C). Activating the power-up reset circuit by
removing and restoring input power or momentarily pulling the
CONTROL pin below the power-up reset threshold resets the
latch and allows TOPSwitch to resume normal power supply
operation. V
supply is latched off.
High-voltage Bias Current Source
This current source biases TOPSwitch from the DRAIN pin and
charges the CONTROL pin external capacitance (C
start-up or hysteretic operation. Hysteretic operation occurs
during auto-restart and latched shutdown. The current source
is regulated in
is switched on and off with an effective duty cycle of
C
approximately 35%. This duty cycle is determined by the ratio
of CONTROL pin charge (I
I
). This current source is turned off during normal operation
CD2
when the output MOSFET is switching.
TOP412/414
V C(reset)
45 mA
3
4
1
PI-1119-110194
is regulated in hysteretic mode when the power
C
) and discharge currents (I
C
) during
T
and
CD1
A
5
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