IC OFFLINE SWIT PROG OVP 8DIP

TOP258PN

Manufacturer Part NumberTOP258PN
DescriptionIC OFFLINE SWIT PROG OVP 8DIP
ManufacturerPower Integrations
SeriesTOPSwitch®-HX
TypeOff Line Switcher
TOP258PN datasheet
 

Specifications of TOP258PN

Output IsolationIsolatedFrequency Range119 ~ 145kHz
Voltage - Output700VPower (watts)77W
Operating Temperature-40°C ~ 150°CPackage / Case8-DIP (0.300", 7.62mm), 7 Leads
Output Voltage700 VInput / Supply Voltage (max)9 V
Input / Supply Voltage (min)- 0.3 VDuty Cycle (max)78 %
Switching Frequency132 KHzOperating Temperature Range- 40 C to + 150 C
Mounting StyleSMD/SMTMaximum Operating Temperature+ 150 C
Minimum Operating Temperature- 40 COutput Current6.88 A
Output Power48 WFor Use With596-1193 - KIT REF DESIGN TOP HX FOR TOP258
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names596-1189-5
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Input Filter
C4
Capacitor
J1
+
HV
-
JP1
HS1
Note: Components U1, R8, C8, C9 and R22
are under heat sink HS1.
Figure 50c. Layout Considerations for TOPSwitch-HX Using L-Package and Operating at 132 kHz.
Quick Design Checklist
In order to reduce the no-load input power of TOPSwitch-HX
designs, the V-pin (or M-pin for P Package) operates at very
low current. This requires careful layout considerations when
designing the PCB to avoid noise coupling. Traces and
components connected to the V-pin should not be adjacent to
any traces carrying switching currents. These include the drain,
clamp network, bias winding return or power traces from other
converters. If the line sensing features are used, then the sense
resistors must be placed within 10 mm of the V-pin to minimize
the V pin node area. The DC bus should then be routed to the
line sense resistors. Note that external capacitance must not
be connected to the V-pin as this may cause misoperaton of the
V pin related functions.
As with any power supply design, all TOPSwitch-HX designs
should be verifi ed on the bench to make sure that components
specifi cations are not exceeded under worst-case conditions.
The following minimum set of tests is strongly recommended:
1.
Maximum drain voltage – Verify that peak V
exceed 675 V at highest input voltage and maximum
overload output power. Maximum overload output power
occurs when the output is overloaded to a level just before
the power supply goes into auto-restart (loss of regulation).
www.powerint.com
Isolation Barrier
Y1-
Capacitor
C6
C7
T1
R7
R6
VR1
Transformer
R22
D5
X
F
D
Y
S
C
C8
U1
R8
C9
C10
D6
R10
VR2
R9
U2
JP2
2.
Maximum drain current – At maximum ambient temperature,
maximum input voltage and maximum output load, verify
drain current waveforms at start-up for any signs of trans-
former saturation and excessive leading edge current spikes.
TOPSwitch-HX has a leading edge blanking time of 220 ns
to prevent premature termination of the ON-cycle. Verify that
the leading edge current spike is below the allowed current
limit envelope (see Figure 53) for the drain current waveform
at the end of the 220 ns blanking period.
3.
Thermal check – At maximum output power, both minimum
and maximum voltage and ambient temperature; verify that
temperature specifi cations are not exceeded for
TOPSwitch-HX, transformer, output diodes and output
capacitors. Enough thermal margin should be allowed for
the part-to-part variation of the R
specifi ed in the data sheet. The margin required can either
be calculated from the values in the parameter table or it can
be accounted for by connecting an external resistance in
series with the DRAIN pin and attached to the same heat
sink, having a resistance value that is equal to the difference
between the measured R
the worst case maximum specifi cation.
does not
DS
Design Tools
Up-to-date information on design tools can be found at the
Power Integrations website: www.powerint.com
TOP252-262
R12
C16
D8
HS2
Output
Rectifier
Output Filter
C17
Capacitor
L3
C18
U4
C19
C21
R20
J2
R17
R13
R15
R21
- DC
+
Out
PI-5216-091508
of TOPSwitch-HX, as
DS(ON)
of the device under test and
DS(ON)
31
Rev. F 01/09