TOP222YN Power Integrations, TOP222YN Datasheet - Page 8

• Manufacturer Part Number: TOP222YN
• Description: IC OFFLINE SWIT PWM OCP HV TO220
• Manufacturer: Power Integrations
• Series: TOPSwitch®-IIr
• Type: Off Line Switcherr

Specifications of TOP222YN

• Output Isolation: Isolated
• Frequency Range: 90 ~ 110kHz
• Voltage - Output: 700V
• Power (watts): 25W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: TO-220-3
• Output Voltage: 5.7 V
• Input / Supply Voltage (max): 265 VAC
• Input / Supply Voltage (min): 85 VAC
• Duty Cycle (max): 70 %
• Switching Frequency: 100 KHz
• Supply Current: 1.2 mA
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 596-1156-5; TOP222YN

Key Application Considerations
General Guidelines
8
TOP221-227
• Keep the SOURCE pin length very short. Use a Kelvin
• Minimize peak voltage and ringing on the DRAIN voltage
• The transformer should be designed such that the rate of
• Do not plug TOPSwitch into a “hot” IC socket during test.
• While performing TOPSwitch device tests, do not exceed
• Under some conditions, externally provided bias or supply
• CONTROL pin currents during auto-restart operation are
connection to the SOURCE pin for the CONTROL pin
bypass capacitor. Use single point grounding techniques at
the SOURCE pin as shown in Figure 9.
at turn-off. Use a Zener or TVS Zener diode to clamp the
drain voltage below the breakdown voltage rating of
TOPSwitch under all conditions, including start-up and
overload. The maximum recommended clamp Zener
voltage for the TOP2XX series is 200 V and the
corresponding maximum reflected output voltage on the
primary is 135 V. Please see Step 4: AN-16 in the 1996-97
Data Book and Design Guide or on our Web site.
change of drain current due to transformer saturation is
within the absolute maximum specification ( I
before turn off as shown in Figure 13). As a guideline, for
most common transformer cores, this can be achieved by
maintaining the Peak Flux Density (at maximum I
current) below 4200 Gauss (420 mT). The transformer
spreadsheets Rev. 2.1 (or later) for continuous and Rev.1.0
(or later) for discontinuous conduction mode provide the
necessary information.
External CONTROL pin capacitance may be charged to
excessive voltage and cause TOPSwitch damage.
maximum CONTROL pin voltage of 9 V or maximum
CONTROL pin current of 100 mA.
current driven into the CONTROL pin can hold the
TOPSwitch in one of the 8 auto-restart cycles indefinitely
and prevent starting. To avoid this problem when doing
bench evaluations, it is recommended that the V
supply be turned on before the DRAIN voltage is applied.
TOPSwitch can also be reset by shorting the CONTROL
pin to the SOURCE pin momentarily.
much lower at low input voltages (< 36 V) which increases
the auto-restart cycle time (see the I
Characteristic curve).
D
7/01
C
vs. DRAIN Voltage
D
in 100 ns
C
power
LIMIT
ReplacingTOPSwitch with TOPSwitch-II
There is no external latching shutdown function in
TOPSwitch-II. Otherwise, the functionality of the
TOPSwitch-II devices is same as that of the TOPSwitch family.
However, before considering TOPSwitch-II as a 'drop in'
replacement in an existing TOPSwitch design, the design
should be verified as described below.
The new TOPSwitch-II family offers more power capability
than the original TOPSwitch family for the same MOSFET
R
reviewed to make sure that the selected TOPSwitch-II
replacement device and other primary components are not over
stressed under abnormal conditions.
The following verification steps are recommended:
DS(ON)
• Short interruptions of AC power may cause TOPSwitch to
• In some cases, minimum loading may be necessary to keep
• Check the transformer design to make sure that it meets the
• Thermal: Higher power capability of the TOPSwitch-II
• Clamp Voltage: Reflected and Clamp voltages should be
• Agency Approval: Migrating to TOPSwitch-II may require
enter the 8-count auto-restart cycle before starting again.
This is because the input energy storage capacitors are not
completely discharged and the CONTROL pin capacitance
has not discharged below the internal power-up reset
voltage.
a lightly loaded or unloaded output voltage within the
desired range due to the minimum ON-time.
section above.
would in many instances allow use of a smaller MOSFET
device (higher R
TOPSwitch power dissipation and power supply efficiency.
Therefore thermal performance of the power supply must
be verified with the selected TOPSwitch-II device.
verified not to exceed recommended maximums for the
TOP2XX Series: 135 V Reflected/200 V Clamp. Please
see Step 4: AN-16 in the Data Book and Design Guide and
readme.txt file attached to the transformer design
spreadsheets.
agency re-approval.
I
. Therefore, the original TOPSwitch design must be
D
specification as outlined in the General Guidelines
DS(ON)
) for reduced cost. This may affect