TOP242-250 TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher Product Highlights + AC DC Lower System Cost, High Design Flexibility IN OUT - Extended power range for higher power applications No heatsink required up to 34 W using P/G packages Features eliminate or reduce cost of external components L D Fully integrated soft-start for minimum stress/overshoot CONTROL Externally programmable accurate current limit C TOPSwitch-GX Wider duty cycle for more power, smaller input capacitor Separate line sense and current limit pins on Y/R/F packages S X F Line under-voltage (UV) detection: no turn off glitches Line overvoltage (OV) shutdown extends line surge limit PI-2632-060200 Line feed-forward with maximum duty cycle (DC ) MAX Figure 1. Typical Flyback Application. reduction rejects line ripple and limits DC at high line MAX Frequency jittering reduces EMI and EMI ltering costs Regulates to zero load without dummy loading OUTPUT POWER TABLE 132 kHz frequency reduces transformer/power supply size 4 230 VAC 15% 85-265 VAC Half frequency option in Y/R/F packages for video applications 3 PRODUCT Open Open Hysteretic thermal shutdown for automatic fault recovery 1 1 Adapter Adapter 2 2 Frame Frame Large thermal hysteresis prevents PC board overheating TOP242 P or G 9 W 15 W 6.5 W 10 W EcoSmart Energy Efcient TOP242 R 15 W 22 W 11 W 14 W Extremely low consumption in remote off mode TOP242 Y or F 10 W 22 W 7 W 14 W (80 mW at 110 VAC, 160 mW at 230 VAC) TOP243 P or G 13 W 25 W 9 W 15 W Frequency lowered with load for high standby efciency TOP243 R 29 W 45 W 17 W 23 W Allows shutdown/wake-up via LAN/input port TOP243 Y or F 20 W 45 W 15 W 30 W TOP244 P or G 16 W 28 W 11 W 20 W TOP244 R 34 W 50 W 20 W 28 W Description TOP244 Y or F 30 W 65 W 20 W 45 W TOPSwitch-GX uses the same proven topology as TOPSwitch, TOP245 P or G 19 W 30 W 13 W 22 W cost effectively integrating the high voltage power MOSFET, TOP245 R 37 W 57 W 23 W 33 W PWM control, fault protection and other control circuitry onto TOP245 Y or F 40 W 85 W 26 W 60 W a single CMOS chip. Many new functions are integrated to TOP246 P or G 21 W 34 W 15 W 26 W reduce system cost and improve design exibility, performance TOP246 R 40 W 64 W 26 W 38 W and energy efciency. TOP246 Y or F 60 W 125 W 40 W 90 W TOP247 R 42 W 70 W 28 W 43 W Depending on package type, either 1 or 3 additional pins over TOP247 Y or F 85 W 165 W 55 W 125 W the TOPSwitch standard DRAIN, SOURCE and CONTROL TOP248 R 43 W 75 W 30 W 48 W terminals allow the following functions: line sensing (OV/UV, TOP248 Y or F 105 W 205 W 70 W 155 W line feed-forward/DC reduction), accurate externally set MAX TOP249 R 44 W 79 W 31 W 53 W current limit, remote ON/OFF, synchronization to an external TOP249 Y or F 120 W 250 W 80 W 180 W lower frequency, and frequency selection (132 kHz/66 kHz). TOP250 R 45 W 82 W 32 W 55 W TOP250 Y or F 135 W 290 W 90 W 210 W All package types provide the following transparent features: Soft-start, 132 kHz switching frequency (automatically reduced Table 1. Notes: 1. Typical continuous power in a non-ventilated enclosed at light load), frequency jittering for lower EMI, wider DC , MAX adapter measured at 50 C ambient. 2. Maximum practical continuous hysteretic thermal shutdown, and larger creepage packages. In power in an open frame design at 50 C ambient. See Key Applications addition, all critical parameters (i.e. current limit, frequency, for detailed conditions. 3. For lead-free package options, see Part PWM gain) have tighter temperature and absolute tolerances Ordering Information. 4. 230 VAC or 100/115 VAC with doubler. to simplify design and optimize system cost. November 2005TOP242-250 Section List 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 Frequency Reduction ............................................................................................................................ 7 Error Amplier ......................................................................................................................................................... 7 On-Chip Current Limit with External Programmability ............................................................................................ 7 Line Under-Voltage Detection (UV) ......................................................................................................................... 8 Line Overvoltage Shutdown (OV) ........................................................................................................................... 8 Line Feed-Forward with DC Reduction .............................................................................................................. 8 MAX Remote ON/OFF and Synchronization ................................................................................................................... 9 Soft-Start ................................................................................................................................................................. 9 Shutdown/Auto-Restart ........................................................................................................................................... 9 Hysteretic Over-Temperature Protection ................................................................................................................. 9 Bandgap Reference .............................................................................................................................................. 10 High-Voltage Bias Current Source ........................................................................................................................ 10 Using Feature Pins ................................................................................................................................................... 10 FREQUENCY (F) Pin Operation ........................................................................................................................... 10 LINE-SENSE (L) Pin Operation ............................................................................................................................ 10 EXTERNAL CURRENT LIMIT (X) Pin Operation .................................................................................................. 11 MULTI-FUNCTION (M) Pin Operation .................................................................................................................. 11 Typical Uses of FREQUENCY (F) Pin ...................................................................................................................... 14 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins ...................................................... 15 Typical Uses of MULTI-FUNCTION (M) Pin ........................................................................................................... 17 Application Examples .............................................................................................................................................. 20 A High Efciency, 30 W, Universal Input Power Supply ........................................................................................ 20 A High Efciency, Enclosed, 70 W, Universal Adapter Supply .............................................................................. 20 A High Efciency, 250 W, 250-380 VDC Input Power Supply ............................................................................... 22 Multiple Output, 60 W, 185-265 VAC Input Power Supply .................................................................................... 23 Processor Controlled Supply Turn On/Off ............................................................................................................. 24 Key Application Considerations ............................................................................................................................. 26 TOPSwitch-II vs. TOPSwitch-GX .......................................................................................................................... 26 TOPSwitch-FX vs. TOPSwitch-GX ....................................................................................................................... 28 TOPSwitch-GX Design Considerations ............................................................................................................... 28 TOPSwitch-GX Layout Considerations ................................................................................................................. 30 Quick Design Checklist ......................................................................................................................................... 32 Design Tools ......................................................................................................................................................... 32 Product Specications and Test Conditions ......................................................................................................... 33 Typical Performance Characteristics .................................................................................................................... 40 Part Ordering Information ....................................................................................................................................... 46 Package Outlines ..................................................................................................................................................... 47 O 2 11/05