Integrated Off-line Switcher - Power Integrations
Description
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TOP242-249
TOPSwitch®-GX Family
Extended Power, Design Flexible, ® EcoSmart , Integrated Off-line Switcher
Product Highlights
Lower System Cost, High Design Flexibility • Extended power range to 250 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 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 (DCMAX) reduction rejects line ripple and limits DCMAX at high line • 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 packages for video applications • Hysteretic thermal shutdown for automatic fault recovery • Large thermal hysteresis prevents PC board overheating
AC IN
®
+ DC OUT -
D
L
CONTROL
TOPSwitch-GX
S X F
C
PI-2632-060200
Figure 1.
Typical Flyback Application.
OUTPUT POWER TABLE
230 VAC ±15%4 85-265 VAC Adapter1 Open Frame2
PRODUCT3 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
Adapter1
EcoSmart - Energy Efficient • Extremely low consumption in remote off mode (80 mW @ 110 VAC, 160 mW @ 230 VAC) • Frequency lowered with load for high standby efficiency • Allows shutdown/wake-up via LAN/input port
Open Frame2
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, perfor...
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