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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Key Application Issues
Use a Kelvin connection to the SOURCE pin for the CONTROL
pin bypass capacitor. Use single point grounding techniques at
the SOURCE pin as shown in Figure 8. Use a ceramic high
frequency decoupling capacitor to bypass noise transients which
might appear on the CONTROL pin. The TOP412 and TOP414
have an over current latching shutdown feature. Failure to use
a high frequency decoupling capacitor may allow incidental
noise to accidentally trigger this feature.
Limit peak voltage and ringing on the DRAIN voltage at turn-
off to a safe value. Use a Zener or TVS Zener diode to clamp
the DRAIN voltage.
Do not plug the TOPSwitch device into a “hot” IC socket during
test. External CONTROL pin capacitance may deliver a surge
current sufficient to trigger the shutdown latch which turns the
TOPSwitch off.
Bias/Feedback
Bias/Feedback
Input
Kelvin-connected
auto-restart/bypass capacitor C5
and/or compensation network
Figure 8. Recommended TOPSwitch Layout.
Under some conditions, externally provided bias or supply
current driven into the CONTROL pin can hold the TOPSwitch
in one of the 8 auto-restart cycles indefinitely and prevent
starting. Shorting the CONTROL pin to the SOURCE pin will
reset the TOPSwitch. To avoid this problem when doing bench
evaluations, it is recommended that the V
turned on before the DRAIN voltage is applied.
CONTROL pin currents during auto-restart operation are much
lower at low input voltages (< 20 V) which increases the auto-
restart cycle period (see the I
curve).
In some cases, minimum loading may be necessary to keep a
lightly loaded or unloaded output voltage within the desired
range due to the minimum ON-time.
For additional applications information regarding the TOPSwitch
family, refer to Web site, www.powerint.com.
G PACKAGE
Return
SOURCE
CONTROL
DRAIN
CONTROL pin transient
decoupling capacitor
TOP VIEW
TOP412/414
power supply be
C
vs. Drain Voltage Characteristic
C
SOURCE
High Voltage
Return
PI-2210-102798
4/99
A
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