TOP245R Power Integrations, Inc., TOP245R Datasheet

TOP245R

Manufacturer Part Number

TOP245R

Description

Manufacturer

Power Integrations, Inc.

Datasheet

1.TOP245R.pdf (52 pages)

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TOP242-250

TOPSwitch - GX Family

Extended Power, Design Flexible,

EcoSmart , Integrated Off-line Switcher

Lower System Cost, High Design Flexibility

• Extended power range for higher power applications

• No heatsink required up to 30 W using P package

• 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

reduce system cost and improve design flexibility, performance

and energy efficiency.

Depending on package type, either 1 or 3 additional pins over the

TOPSwitch standard DRAIN, SOURCE and CONTROL terminals

allow the following functions: line sensing (OV/UV, line feed-

forward/DC

remote ON/OFF, 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

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)

MAX

Product Highlights

reduction), accurate externally set current limit,

MAX

at high line

, hysteretic

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

TOP245 P

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

19 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

28 W

50 W

65 W

30 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

13 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

September 2003

PI-2632-060200

125 W

155 W

180 W

210 W

Frame

10 W

14 W

15 W

23 W

30 W

20 W

28 W

45 W

22 W

33 W

60 W

38 W

90 W

43 W

48 W

53 W

55 W

Open

OUT

Related parts for TOP245R

TOP245R 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 for higher power applications • No heatsink required ...

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 feedback signal from the supply ...

Page 7

This oscillator sets the pulse width modulator/current limit latch at the beginning of each cycle. The nominal switching frequency of 132 kHz was chosen to minimize transformer size while keeping the fundamental EMI ...

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 Bandgap Reference All critical TOPSwitch-GX internal voltages are derived from a temperature-compensated bandgap reference. This reference is also used to generate a temperature-compensated current reference which is trimmed to accurately set the switching frequency, MOSFET gate drive current, current ...

Page 11

OV triggers at I typical with 8 µA hysteresis). Between the UV and OV thresholds, the output is enabled. For line feed-forward with DC reduction, the vertical axis represents the magnitude of MAX the DC ...

Page 12

TOP242-250 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 (P or ...

Page 13

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 and F Package TOPSwitch-GX 240 ...

Page 14

TOP242-250 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 LinkSwitch & TinySwitch-II AC-DC Seminar 14 K 9/03 ...

Page 15

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 Tied to SOURCE or ...

Page 16

TOP242-250 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 ...

Page 17

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

Page 18

TOP242-250 Typical Uses of MULTI-FUNCTION (M) Pin (cont Input Voltage D M CONTROL Figure 34. Externally Set Current Limit (Not Normally Required- See M Pin Operation Description output or can ...

Page 19

Typical Uses of MULTI-FUNCTION (M) Pin (cont output or can be replaced by a manual switch. DC Input Voltage CONTROL ON/OFF 47 kΩ Figure 38. Active-on Remote ON/OFF with ...

Page 20

TOP242-250 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 ...

Page 21

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 22

TOP242-250 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 input ...

Page 23

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 45 ...

Page 24

TOP242-250 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 ...

Page 25

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 230 ...

Page 26

TOP242-250 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 ...

Page 27

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% Typical DRAIN DIP 0.037" / 0.94 mm Creepage SMD 0.037" Package ...

Page 28

TOP242-250 TOPSwitch-FX Function 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 ...

Page 29

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 minimized ...

Page 30

TOP242-250 For designs where operating current is significantly lower than the default current limit recommended to use an externally set current limit close to the operating peak current to reduce peak flux density and peak power (see Figures ...

Page 31

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 TOPSwitch-GX ...

Page 32

TOP242-250 Solder Side Component Side + TOP VIEW HV - R1a - 1c TOPSwitch-GX Figure 49. Layout Considerations for TOPSwitch-GX using R Package. Verify that the leading edge current spike is below the allowed current limit envelope (see Figure 52) ...

Page 33

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 34

TOP242-250 Parameter Symbol CONTROL FUNCTIONS (cont.) Maximum Duty DC Cycle MAX 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 ...

Page 35

Parameter Symbol SHUTDOWN/AUTO-RESTART (cont.) Auto-restart Upper V C(AR)U Threshold Voltage Auto-restart Lower V Threshold Voltage C(AR)L Auto-restart V Hysteresis Voltage C(AR)hyst Auto-restart Duty DC Cycle (AR) Auto-restart f Frequency (AR) MULTI-FUNCTION (M), LINE-SENSE (L) AND EXTERNAL CURRENT LIMIT (X) INPUTS ...

Page 36

TOP242-250 Parameter Symbol MULTI-FUNCTION, LINE-SENSE AND EXTERNAL CURRENT LIMIT INPUTS (cont.) Maximum Duty Cycle Reduction I or L(DC) Onset Threshold I M(DC) Current Remote OFF I DRAIN Supply D(RMT) Current Remote ON Delay t R(ON) Remote OFF t R(OFF) Setup ...

Page 37

Parameter Symbol CIRCUIT PROTECTION (cont.) Self Protection I Current Limit LIMIT (See Note C) Initial Current Limit I INIT Leading Edge t Blanking Time LEB t Current Limit Delay IL(D) Thermal Shutdown Temperature Thermal Shutdown Hysteresis Power-up Reset V Threshold ...

Page 38

TOP242-250 Parameter Symbol OUTPUT (cont.) ON-State R DS(ON) Resistance OFF-State Drain I Leakage Current DSS Breakdown BV Voltage DSS t Rise Time R Fall Time t F SUPPLY VOLTAGE CHARACTERISTICS DRAIN Supply Voltage Shunt Regulator V Voltage C(SHUNT) Shunt Regulator ...

Page 39

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 L Pin) ...

Page 40

TOP242-250 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 ...

Page 41

Figure 55a. Current Limit vs. MULTI-FUNCTION Pin Current (TOP245P only). 1.1 1.0 0.9 0.8 0.7 0.6 Typical 0.5 0.4 Measured at 25 °C. 0.3 0 10K ...

Page 42

TOP242-250 Typical Performance Characteristics (cont.) 1.1 1.0 0.9 -50 - 100 125 150 Junction Temperature (°C) Figure 56. Breakdown Voltage vs. Temperature. 1.2 1.0 0.8 0.6 0.4 0.2 0 -50 - 100 ...

Page 43

Typical Performance Characteristics (cont.) 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 0 100 200 LINE-SENSE Pin Current ( A) Figure 62a. LINE-SENSE Pin Voltage vs. Current See 1 Expanded Version 0 -300 -200 ...

Page 44

TOP242-250 Typical Performance Characteristics (cont Scaling Factors: 3 TOP250 1.17 TOP249 1.00 TOP248 0.83 2 TOP247 0.67 TOP246 0.50 TOP245 0.33 1 TOP244 0. °C TOP243 0.17 CASE T = 100 °C TOP242 0.08 ...

Page 45

PART ORDERING INFORMATION TOP 242 .390 (9.91) .146 (3.71) .420 (10.67) .156 (3.96) .108 (2.74) REF + .461 (11.71) .495 (12.57) .860 (21.84) .880 (22.35) .024 (.61) PIN 1 .034 (.86) .050 (1.27) BSC .150 (3.81) BSC ...

Page 46

TOP242-250 ⊕ .004 (.10) -E- .240 (6.10) .260 (6.60) Pin 1 .367 (9.32) -D- .387 (9.83) .125 (3.18) .145 (3.68) -T- SEATING PLANE .100 (2.54) BSC .048 (1.22) .053 (1.35) .014 (.36) ⊕ .010 ...

Page 47

Ref .024 (0.61) .034 (0.86) .315 (8.00) .380 (9.65) .638 (16.21) .050 (1.27) .038 (0.97) TO-263-7C .245 (6.22) min. .225 (5.72) min. .580 (14.73) ...

Page 48

TOP242-250 .390 (9.91) .420 (10.67) .795 (20.18) REF. PIN 1 .050 (1.27) BSC .150 (3.81) BSC .050 (1.27) .050 (1.27) .050 (1.27) .200 (5.08) .100 (2.54) PIN 1 .150 (3.81) MOUNTING HOLE PATTERN F07C LinkSwitch & TinySwitch-II AC-DC Seminar 48 ...

Page 49

Notes TOP242-250 K 49 9/03 ...

Page 50

TOP242-250 LinkSwitch & TinySwitch-II AC-DC Seminar 50 K 9/03 Notes General Information & Table of Contents Product Selector Guide Quality and Reliability DPA-Switch DC-DC Seminar TOPSwitch-GX AC-DC Seminar 10 Sales Representatives and Distributors 11 Data Sheets Application Notes Design Ideas ...

Page 51

Revision Notes - D 1) Added R package (D2PAK Corrected abbreviations (s = seconds). 3) Corrected x-axis units in Figure 11 (µA). 4) Added missing external current limit resistor in Figure Corrected spelling. 6) Added ...

Page 52

... POWER INTEGRATIONS' PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS, INC. As used herein: 1. Life support devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user ...

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