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TOP221

Three-Terminal Off-Line PWM Switch

Power Integrations, Inc 

This product is not recommended for new designs.

TOP221-227

TOPSwitch-II Family

Three-Terminal Off-Line PWM Switch

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

AC

IN

D

TOPSwitch

CONTROL

C

S

Figure 1. Typical Flyback Application.

PI-1951-091996

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.

Output Power Table

TO-220 (Y) Package1

PART

ORDER

NUMBER

Single Voltage Input 3

100/115/230 VAC ±15%

P 4,6

MAX

Wide Range Input

85 to 265 VAC

P 4,6

MAX

TOP221YN

12 W

7W

TOP222YN

25 W

15 W

8L PDIP (P) or 8L SMD (G) Package2

PART

ORDER

NUMBER

Single Voltage Input3

100/115/230 VAC ±15%

P 5,6

MAX

Wide Range Input

85 to 265 VAC

P 5,6

MAX

TOP221PN or TOP221GN

9W

6W

TOP222PN or TOP222GN

15 W

10 W

TOP223YN

50 W

30 W

TOP223PN or TOP223GN

25 W

15 W

TOP224YN

75 W

45 W

TOP224PN or TOP224GN

30 W

20 W

TOP225YN

100 W

60 W

TOP226YN

125 W

75 W

TOP227YN

150 W

90 W

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 cm2), 2 oz.

copper clad (610 gm/m2) 6. PMAX 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.

www.power.com

This Product is Covered by Patents and/or Pending Patent Applications.

August 2016

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