TOP245R Power Integrations, Inc., TOP245R Datasheet
TOP245R
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TOP245R Summary of contents
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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 ...
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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 ...
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V C CONTROL ( SHUNT REGULATOR/ ERROR AMPLIFIER - + 5 (LIMIT) CURRENT LIMIT SOFT START ADJUST ON/OFF EXTERNAL CURRENT LIMIT ( LINE-SENSE ( ...
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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: ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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) ...
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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 ............................... ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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) ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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) ...
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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 ...
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Notes TOP242-250 K 49 9/03 ...
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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 ...
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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 ...
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... 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 ...