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

TOP221PN or TOP221GN

TOP222PN or TOP222GN

TOP223PN or TOP223GN

TOP224PN or TOP224GN

Output Power Table

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

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.