TOP242R POWERINT [Power Integrations, Inc.], TOP242R Datasheet

TOP242R

Manufacturer Part Number

TOP242R

Description

TOPSwitch -GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher

Manufacturer

POWERINT [Power Integrations, Inc.]

Datasheet

1.TOP242R.pdf (52 pages)

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TOP242-250

TOPSwitch - GX Family

Extended Power, Design Flexible,

EcoSmart ,

Lower System Cost, High Design Flexibility

• Extended power range to 290 W

• Features eliminate or reduce cost of external components

• Fully integrated soft-start for minimum stress/overshoot

• Externally programmable accurate current limit

• Wider duty cycle for more power, smaller input capacitor

• Separate line sense and current limit pins on Y/R/F packages

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

• Line overvoltage (OV) shutdown extends line surge limit

• Line feed forward with maximum duty cycle (DC

• Frequency jittering reduces EMI and EMI filtering costs

• Regulates to zero load without dummy loading

• 132 kHz frequency reduces transformer/power supply size

• Half frequency option in Y/R/F packages for video applications

• Hysteretic thermal shutdown for automatic fault recovery

• Large thermal hysteresis prevents PC board overheating

EcoSmart - Energy Efficient

• Extremely low consumption in remote off mode

• Frequency lowered with load for high standby efficiency

• Allows shutdown/wake-up via LAN/input port

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 re-

duce 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), accu-

rate externally set current limit, remote on/off, and synchroni-

zation 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

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.

reduction rejects line ripple and limits DC

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

Product Highlights

Integrated Off-line Switcher

MAX

at high line

MAX

)

Figure 1. Typical Flyback Application.

Table 1. Notes: 1. Typical continuous power in a non-ventilated

enclosed adapter measured at 50 °C ambient. 2. Maximum practical

continuous power in an open frame design at 50 °C ambient. See

Key Applications for detailed conditions. 3. See Part Ordering

Information. 4. 230 VAC or 100/115 VAC with doubler.

TOP242 P or G

TOP243 P or G

TOP244 P or G

TOP242 Y or F

TOP243 Y or F

TOP244 Y or F

TOP245 Y or F

TOP246 Y or F

TOP247 Y or F

TOP248 Y or F

TOP249 Y or F

TOP250 Y or F

PRODUCT

TOP242 R

TOP243 R

TOP244 R

TOP245 R

TOP246 R

TOP247 R

TOP248 R

TOP249 R

TOP250 R

TOPSwitch-GX

OUTPUT POWER TABLE

Adapter

105 W

120 W

135 W

21 W

10 W

13 W

29 W

20 W

16 W

34 W

30 W

37 W

40 W

60 W

42 W

85 W

43 W

44 W

45 W

230 VAC

9 W

CONTROL

Frame

125 W

165 W

205 W

250 W

290 W

Open

15 W

22 W

25 W

45 W

30 W

50 W

65 W

57 W

85 W

64 W

70 W

75 W

79 W

82 W

15%

Adapter

6.5 W

11 W

17 W

15 W

11 W

20 W

23 W

26 W

40 W

28 W

55 W

30 W

70 W

31 W

80 W

32 W

90 W

7 W

9 W

85-265 VAC

January 2002

PI-2632-060200

Frame

125 W

155 W

180 W

210 W

10 W

14 W

15 W

23 W

30 W

20 W

28 W

45 W

33 W

60 W

38 W

90 W

43 W

48 W

53 W

55 W

Open

OUT

Related parts for TOP242R

TOP242R Summary of contents

Page 1

TOP242-250 TOPSwitch - GX Family Extended Power, Design Flexible, ® EcoSmart , Integrated Off-line Switcher Product Highlights Lower System Cost, High Design Flexibility • Extended power range to 290 W • Features eliminate or reduce cost of external components • ...

Page 2

TOP242-250 Functional Block Diagram ......................................................................................................................................... 3 Pin Functional Description ........................................................................................................................................ 4 TOPSwitch-GX Family Functional Description ........................................................................................................ 5 CONTROL (C) Pin Operation ................................................................................................................................. 6 Oscillator and Switching Frequency ....................................................................................................................... 6 Pulse Width Modulator and Maximum Duty Cycle ................................................................................................. 7 Light Load ...

Page 3

V C CONTROL ( SHUNT REGULATOR/ ERROR AMPLIFIER - + 5 (LIMIT) CURRENT LIMIT SOFT START ADJUST ON/OFF EXTERNAL CURRENT LIMIT ( LINE-SENSE ( ...

Page 4

TOP242-250 Pin Functional Description DRAIN (D) Pin: High voltage power MOSFET drain output. The internal start-up bias current is drawn from this pin through a switched high-voltage current source. Internal current limit sense point for drain current. CONTROL (C) Pin: ...

Page 5

TOPSwitch-GX Family Functional Description Like TOPSwitch, TOPSwitch- integrated switched mode power supply chip that converts a current at the control input to a duty cycle at the open drain output of a high voltage power MOSFET. During normal ...

Page 6

TOP242-250 CONTROL (C) Pin Operation The CONTROL pin is a low impedance node that is capable of receiving a combined supply and feedback current. During normal operation, a shunt regulator is used to separate the feed- back signal from the ...

Page 7

The nominal switching frequency of 132 kHz was chosen to minimize transformer size while keeping the fundamental EMI frequency below 150 kHz. The FREQUENCY pin (available ...

Page 8

TOP242-250 CURRENT LIMIT (X) pin ( package) or MULTI- FUNCTION (M) pin ( package) and the rectified DC high voltage bus, the current limit is reduced with increasing line voltage, allowing a true power limiting ...

Page 9

DC of 38% at the OV threshold was MAX chosen to ensure that the power capability of the TOPSwitch-GX is not restricted by this feature under normal operation. Remote ...

Page 10

TOP242-250 is also used to generate a temperature-compensated current reference which is trimmed to accurately set the switching frequency, MOSFET gate drive current, current limit, and the line OV/UV thresholds. TOPSwitch-GX has improved circuitry to maintain all of the above ...

Page 11

Using Feature Pins FREQUENCY (F) Pin Operation The FREQUENCY pin is a digital input pin available in the package only. Shorting the FREQUENCY pin to SOURCE pin selects the nominal switching frequency of 132 kHz (Figure ...

Page 12

TOP242-250 Figure Number Three Terminal Operation Under-Voltage Overvoltage Line Feed Forward (DC ) MAX Overload Power Limiting External Current Limit Remote ON/OFF *This table is only a partial list of many MULTI-FUNCTION pin configurations that are possible. Table 3. Typical ...

Page 13

X Pin (Enabled) Output MOSFET Switching (Disabled) I (Default) LIMIT Current Limit DC (78.5%) MAX Maximum Duty Cycle V BG Pin Voltage -250 -200 -150 X and L Pins ( Package) and M Pin ( ...

Page 14

TOP242-250 CONTROL Pin EXTERNAL CURRENT LIMIT (X) LINE-SENSE (L) Figure 12a. LINE-SENSE (L), and EXTERNAL CURRENT LIMIT (X) Pin Input Simplified Schematic. CONTROL Pin MULTI-FUNCTION (M) Figure 12b. MULTI-FUNCTION (M) Pin Input Simplified Schematic 1/ and ...

Page 15

Typical Uses of FREQUENCY (F) Pin + DC D Input CONTROL Voltage Figure 13. Full Frequency Operation (132 kHz). Figure 15. Half Frequency Standby Mode (For High Standby Input Voltage C PI-2654-071700 Figure 14. Half Frequency Operation ...

Page 16

TOP242-250 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins + DC Input Voltage D L CONTROL Figure 16. Three Terminal Operation (LINE-SENSE and EXTERNAL CURRENT LIMIT Features Disabled. FREQUENCY Pin can be tied ...

Page 17

Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont output or can be replaced by a manual switch Input CONTROL Voltage Figure 22. Active-on (Fail ...

Page 18

TOP242-250 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont Input CONTROL Voltage Figure 28. Line-Sensing and Externally Set Current Limit. 18 ...

Page 19

Typical Uses of MULTI-FUNCTION (M) Pin + DC Input Voltage D M CONTROL S - Figure 30. Three Terminal Operation (MULTI-FUNCTION Features Disabled Input Voltage D M CONTROL C 6 Figure ...

Page 20

TOP242-250 Typical Uses of MULTI-FUNCTION (M) Pin (cont output or can be replaced by a manual switch. DC Input Voltage D M CONTROL Q R ON/OFF Figure 36. Active-on (Fail Safe) Remote ON/OFF. ...

Page 21

Application Examples A High Efficiency Universal Input Power Supply The circuit shown in Figure 41 takes advantage of several of the TOPSwitch-GX features to reduce system cost and power supply size and to improve efficiency. This design delivers ...

Page 22

TOP242-250 A High Efficiency, Enclosed Universal Adapter Supply The circuit shown in figure 42 takes advantage of several of the TOPSwitch-GX features to reduce cost, power supply size and increase efficiency. This design delivers ...

Page 23

A High Efficiency, 250 W, 250 – 380 VDC Input Power Supply The circuit shown in figure 43 delivers 250 84% efficiency using a TOP249 from a 250 to 380 VDC input. DC ...

Page 24

TOP242-250 Multiple Output 185-265 VAC Input Power Supply Figure 44 shows a multiple output supply typical for high end set-top boxes or cable decoders containing high capacity hard disks for recording. The supply delivers an output power of ...

Page 25

Processor Controlled Supply Turn On/Off A low cost momentary contact switch can be used to turn the TOPSwitch-GX power on and off under microprocessor control that may be required in some applications such as printers. The low power remote off ...

Page 26

TOP242-250 In addition to using a minimum number of components, TOPSwitch-GX provides many technical advantages in this type of application: 1. Extremely low power consumption in the off mode typical at 110 VAC and 160 mW typical at ...

Page 27

Key Application Considerations TOPSwitch-II vs. TOPSwitch-GX Table 4 compares the features and performance differences between TOPSwitch-GX and TOPSwitch-II. Many of the new features eliminate the need for additional discrete components. Function TOPSwitch-II Soft-Start N/A* External Current Limit N/A* DC 67% ...

Page 28

TOP242-250 Function TOPSwitch-II Remote ON/OFF N/A* Synchronization N/A* Thermal Shutdown 125 °C min. Latched Current Limit Tolerance ±10% (@25 °C) -8% (0 °C to100 °C) -4% (0 °C to 100 °C) DRAIN DIP 0.037" / 0.94 mm Creepage SMD 0.037" ...

Page 29

Function TOPSwitch-FX P/G Package Current Identical to Y Limits packages Y/R/F Package Current 100% (R and F Limits package N/A*) Thermal Shutdown 125 °C min. 70 °C hysteresis Maximum Duty Cycle 90 µA Reduction Threshold Line Under-Voltage N/A* Negative (turn-off) ...

Page 30

TOP242-250 A high V is required to take full advantage of the wider TOPSwitch-GX. An RCD clamp provides tighter clamp voltage tolerance than a Zener clamp and allows a V 150 V. RCD clamp dissipation can be ...

Page 31

TOPSwitch-GX contribute to a smaller transformer when compared to TOPSwitch-II. Standby Consumption Frequency reduction can significantly reduce power loss at light or no load, especially when a Zener clamp is used. For very low ...

Page 32

TOP242-250 + HV Input Filter Capacitor - S TOP VIEW R1 R2 Figure 47. Layout Considerations for TOPSwitch-GX using Packages. + Input Filter Capacitor HV - TOPSwitch-GX TOP VIEW R1 Heat Sink Figure 48. Layout Considerations for ...

Page 33

Solder Side Component Side + TOP VIEW HV - R1a - 1c TOPSwitch-GX Figure 49. Layout Considerations for TOPSwitch-GX using R Package. the part-to-part variation of the R DS(ON) as specified in the data sheet. The margin required can either ...

Page 34

TOP242-250 DRAIN Voltage ............................................ -0.3 to 700 V DRAIN Peak Current: TOP242 ............................... 0.72 A TOP243 ............................... 1.44 A TOP244 ............................... 2.16 A TOP245 ............................... 2.88 A TOP246 ............................... 4.32 A TOP247 ............................... 5.76 A TOP248 ............................... 7.20 A TOP249 ...

Page 35

Parameter Symbol CONTROL FUNCTIONS Soft Start Time t SOFT PWM Gain DC reg PWM Gain Temperature Drift External Bias l B Current CONTROL Current C(OFF) Duty Cycle Dynamic Z Impedance C Dynamic Impedance Temperature Drift Control Pin ...

Page 36

TOP242-250 Parameter Symbol MULTI-FUNCTION (M), LINE-SENSE (L) AND EXTERNAL CURRENT LIMIT (X) INPUTS Line Under-Voltage Threshold Current l UV and Hysteresis ( Pin) Line Over-Voltage or Remote ON/ I OFF Threshold OV Current and Hys- teresis (M or ...

Page 37

Parameter Symbol MULTI-FUNCTION (M), LINE-SENSE (L) AND EXTERNAL CURRENT LIMIT (X) INPUTS Remote ON Delay t R(ON) Remote OFF t R(OFF) Setup Time FREQUENCY INPUT FREQUENCY Pin V Threshold Voltage F FREQUENCY Pin I Input Current F CIRCUIT PROTECTION Self ...

Page 38

TOP242-250 Parameter Symbol CIRCUIT PROTECTION Leading Edge t LEB Blanking Time t Current Limit Delay IL(D) Thermal Shutdown Temperature Thermal Shutdown Hysteresis Power-up Reset V Threshold Voltage C(RESET) OUTPUT ON-State R Resistance DS(ON) Off-State I Current DSS Breakdown BV Voltage ...

Page 39

Parameter Symbol OUTPUT t Rise Time R Fall Time t F SUPPLY VOLTAGE CHARACTERISTICS DRAIN Supply Voltage Shunt Regulator V Voltage C(SHUNT) Shunt Regulator Temperature Drift l CD1 Control Supply/ Discharge Current l CD2 NOTES: A. For specifications with negative ...

Page 40

TOP242-250 VOLTAGE Figure 50. Duty Cycle Measurement. 120 100 Dynamic 1 = Impedance Slope CONTROL Pin Voltage (V) Figure 51. CONTROL Pin I-V Characteristic Package (X and ...

Page 41

BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS The following precautions should be followed when testing TOPSwitch-GX by itself outside of a power supply. The sche- matic shown in Figure 53 is suggested for laboratory testing of TOPSwitch-GX. When the ...

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