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Figure 1. Typical Flyback Application.
reduces cost in lower power, high efficiency applications.
The internal lead frame of this package uses six of its pins to
transfer heat from the chip directly to the board, eliminating
the cost of a heat sink. TOPSwitch incorporates all functions
necessary for a switched mode control system into a three
terminal monolithic IC: power MOSFET, PWM controller, high
voltage start up circuit, loop compensation and fault protec-
tion circuitry.
Product Highlights
• Lowest cost, lowest component count switcher solution
• Cost competitive with linears above 5 W
• Very low AC/DC losses – up to 90% efficiency
• Built-in Auto-restart and Current limiting
• Latching Thermal shutdown for system level protection
• Implements Flyback, Forward, Boost or Buck topology
• Works with primary or opto feedback
• Stable in discontinuous or continuous conduction mode
• Source connected tab for low EMI
• Circuit simplicity and Design Tools reduce time to market
Description
The second generation TOPSwitch™-II family is more cost
effective and provides several enhancements over the first
generation TOPSwitch family. The TOPSwitch-II family
extends the power range from 100W to 150W for 100/115/
230 VAC input and from 50W to 90W for 85-265 VAC univer-
sal input. This brings TOPSwitch technology advantages
to many new applications, i.e. TV, Monitor, Audio amplifiers,
etc. Many significant circuit enhancements that reduce the
sensitivity to board layout and line transients now make the
design even easier. The standard 8L PDIP package option
PI-1951-091996
AC
IN
TOPSwitch
D
S
C
CONTROL
6 W
10 W
15 W
20 W
TOP221YN
TOP222YN
TOP223YN
TOP224YN
TOP225YN
TOP226YN
TOP227YN
9 W
15 W
25 W
30 W
TOP221 PN or TOP221GN
TOP222 PN or TOP222GN
TOP223 PN or TOP223GN
TOP224 PN or TOP224GN
Output Power Table
TO-220 (Y) Package
1
8L PDIP (P) or 8L SMD (G) Package
2
P
MAX
5,6
PART
ORDER
NUMBER
Single Voltage Input
100/115/230 VAC ±15%
3
Wide Range Input
85 to 265 VAC
Single Voltage Input
100/115/230 VAC ±15%
3
Wide Range Input
85 to 265 VAC
P
MAX
5,6
7 W
15 W
30 W
45 W
60 W
75 W
90 W
P
MAX
4,6
12 W
25 W
50 W
75 W
100 W
125 W
150 W
P
MAX
4,6
Notes: 1. Package outline: TO-220/3 2. Package Outline: DIP-8 or SMD-8 3. 100/115 VAC with doubler input 4. Assumes appro-
priate heat sinking to keep the maximum TOPSwitch junction temperature below 100 °C. 5. Soldered to 1 sq. in. (6.45 cm
2
), 2 oz.
copper clad (610 gm/m
2
) 6. P
MAX
is the maximum practical continuous power output level for conditions shown. The continuous
power capability in a given application depends on thermal environment, transformer design, efficiency required, minimum spec-
ified input voltage, input storage capacitance, etc. 7. Refer to key application considerations section when using TOPSwitch-II in
an existing TOPSwitch design.
PART
ORDER
NUMBER
TOP221-227
TOPSwitch-II Family
www.power.com August 2016
Three-Terminal Off-Line PWM Switch
This Product is Covered by Patents and/or Pending Patent Applications.
This product is not recommended for new designs.