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TOP242-249

TOPSwitch

廬

-GX

Family

Extended Power, Design Flexible,

廬

EcoSmart

,

Integrated Off-line Switcher

Product Highlights

Lower System Cost, High Design Flexibility

鈥?Extended power range to 250 W

鈥?Features eliminate or reduce cost of external components

鈥?Fully integrated soft-start for minimum stress/overshoot

鈥?Externally programmable accurate current limit

鈥?Wider duty cycle for more power, smaller input capacitor

鈥?Separate line sense and current limit pins on Y/R packages

鈥?Line under-voltage (UV) detection: no turn off glitches

鈥?Line overvoltage (OV) shutdown extends line surge limit

鈥?Line feed forward with maximum duty cycle (DC

MAX

)

reduction rejects line ripple and limits DC

MAX

at high line

鈥?Frequency jittering reduces EMI and EMI filtering costs

鈥?Regulates to zero load without dummy loading

鈥?132 kHz frequency reduces transformer/power supply size

鈥?Half frequency option in Y/R packages for video applications

鈥?Hysteretic thermal shutdown for automatic fault recovery

鈥?Large thermal hysteresis prevents PC board overheating

AC

IN

廬

+

DC

OUT

-

D

L

CONTROL

TOPSwitch-GX

S

X

F

C

PI-2632-060200

Figure 1. Typical Flyback Application.

OUTPUT POWER TABLE

230 VAC

鹵

15%

4

85-265 VAC

Adapter

1

Open

Frame

2

PRODUCT

3

Adapter

1

EcoSmart

-

Energy Efficient

鈥?Extremely low consumption in remote off mode

(80 mW @ 110 VAC, 160 mW @ 230 VAC)

鈥?Frequency lowered with load for high standby efficiency

鈥?Allows shutdown/wake-up via LAN/input port

Open

Frame

2

Description

TOPSwitch-GX

uses the same proven topology as

TOPSwitch,

cost effectively integrating the high voltage power MOSFET,

PWM control, fault protection and other control circuitry onto

a single CMOS chip. Many new functions are integrated to

reduce system cost and improve design flexibility, performance

and energy efficiency.

Depending on package type, the

TOPSwitch-GX

family has

either 1 or 3 additional pins over the standard DRAIN, SOURCE

and CONTROL terminals. allowing the following functions:

line sensing (OV/UV, line feedforward/DC max reduction),

accurate externally set current limit, remote on/off, and

synchronization to an external lower frequency and frequency

selection (132 kHz/66 kHz).

All package types provide the following transparent features:

Soft-start, 132 kHz switching frequency (automatically reduced

at light load), frequency jittering for lower EMI, wider DC

MAX

,

hysteretic thermal shutdown and larger creepage packages. In

addition, all critical parameters (i.e. current limit, frequency,

PWM gain) have tighter temperature and absolute tolerance, to

simplify design and optimize system cost.

TOP242 P or G

TOP242 R

TOP242 Y

TOP243 P or G

TOP243 R

TOP243 Y

TOP244 P or G

TOP244 R

TOP244 Y

TOP245 R

TOP245 Y

TOP246 R

TOP246 Y

TOP247 R

TOP247 Y

TOP248 R

TOP248 Y

TOP249 R

TOP249 Y

9W

10 W

10 W

13 W

20 W

13 W

16 W

28 W

30 W

33 W

40 W

37 W

60 W

41 W

85 W

43 W

105 W

45 W

120 W

15 W

22 W

22 W

25 W

43 W

45 W

30 W

52 W

65 W

58 W

85 W

65 W

125 W

73 W

165 W

78 W

205 W

82 W

250 W

6.5 W

7W

7W

9W

15 W

15 W

11 W

18 W

20 W

20 W

26 W

24 W

40 W

26 W

55 W

28 W

70 W

30 W

80 W

10 W

14 W

14 W

15 W

23 W

30 W

20 W

28 W

45 W

32 W

60 W

36 W

90 W

43 W

125 W

48 W

155 W

52 W

180 W

Table 1.

Notes:

1.

Typical continuous power in a non-ventilated

enclosed adapter measured at 50

擄C

ambient. Assumes 1 sq. in. of

2 oz. copper heat sink area for R package.

2.

Maximum practical

continuous power in an open frame design at 50

擄C

ambient. See

Key Applications for detailed conditions. Assumes 3 sq. in. of 2 oz.

copper heat sink area for R package.

3.

See Part Ordering Information.

4.

230 VAC or 100/115 VAC with doubler.

July 2001

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