TOP250Y

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< Analog Electronic ~ TOP250Y

jojolucky

Posted: Tue Jan 10, 2012 2:39 am Post subject: TOP250Y

Joined: 12 Apr 2008 Posts: 299

The TOP250Y is an integrated off-line switcher. It 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.
ParametricsAbsolute maximum ratings: (1)DRAIN Voltage: -0.3 to 700 V; (2)CONTROL Voltage: -0.3 to 9 V; (3)CONTROL Current: 100 mA; (4)LINE SENSE Pin Voltage: -0.3 to 9 V; (5)CURRENT LIMIT Pin Voltage: -0.3 to 4.5 V; (6)MULTI-FUNCTION Pin Voltage: -0.3 to 9 V; (7)FREQUENCY Pin Voltage: -0.3 to 9 V; (8)Storage Temperature: -65 to 150 ℃; (9)Operating Junction Temperature: -40 to 150 ℃; (10)Lead Temperature : 260 ℃.
FeaturesFeatures: (1)Extended power range to 290 W; (2)Features eliminate or reduce cost of external components; (3)Fully integrated soft-start for minimum stress/overshoot; (4)Externally programmable accurate current limit; (5)Wider duty cycle for more power, smaller input capacitor; (6)Separate line sense and current limit pins on Y/R/F packages; (7)Line under-voltage (UV) detection: no turn off glitches; (8)Line overvoltage (OV) shutdown extends line surge limit; (9)Line feed forward with maximum duty cycle (DCMAX) reduction rejects line ripple and limits DCMAX at high line; (10)Frequency jittering reduces EMI and EMI filtering costs; (11)Regulates to zero load without dummy loading; (12)132 kHz frequency reduces transformer/power supply size; (13)Half frequency option in Y/R/F packages for video applications; (14)Hysteretic thermal shutdown for automatic fault recovery; (15)Large thermal hysteresis prevents PC board overheating.

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