Produktbeskrivning
TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
Like TOPSwitch, TOPSwitch-GX is an 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 operation the duty cycle of the power MOSFET decreases linearly with increasing CONTROL pin current as shown in Figure 7. In addition to the three terminal TOPSwitch features, such as the high voltage start-up, the cycle-by-cycle current limiting, loop compensation circuitry, auto-restart, thermal shutdown, the TOPSwitch-GX incorporates many additional functions that reduce system cost, increase power supply performance and design ?exibility. A patented high voltage CMOS technology allows both the high voltage power MOSFET and all the low voltage control circuitry to be cost effectively integrated onto a single monolithic chip.
Features
* Extended power range for higher power applications
* 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
* 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 ?ltering costs
* Regulates to zero load without dummy loading
* 132kHz frequency reduces transformer/power supply size
* Half frequency option for video applications
* Hysteretic thermal shutdown for automatic fault recovery
* Large thermal hysteresis prevents PC board overheating
* Extremely low consumption in remote off mode (80 mW at 110 VAC, 160 mW at 230 VAC)
* Frequency lowered with load for high standby ef?ciency
* Allows shutdown/wake-up via LAN/input port
Like TOPSwitch, TOPSwitch-GX is an 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 operation the duty cycle of the power MOSFET decreases linearly with increasing CONTROL pin current as shown in Figure 7. In addition to the three terminal TOPSwitch features, such as the high voltage start-up, the cycle-by-cycle current limiting, loop compensation circuitry, auto-restart, thermal shutdown, the TOPSwitch-GX incorporates many additional functions that reduce system cost, increase power supply performance and design ?exibility. A patented high voltage CMOS technology allows both the high voltage power MOSFET and all the low voltage control circuitry to be cost effectively integrated onto a single monolithic chip.
Features
* Extended power range for higher power applications
* 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
* 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 ?ltering costs
* Regulates to zero load without dummy loading
* 132kHz frequency reduces transformer/power supply size
* Half frequency option for video applications
* Hysteretic thermal shutdown for automatic fault recovery
* Large thermal hysteresis prevents PC board overheating
* Extremely low consumption in remote off mode (80 mW at 110 VAC, 160 mW at 230 VAC)
* Frequency lowered with load for high standby ef?ciency
* Allows shutdown/wake-up via LAN/input port