TOP258YN Electronic IC Chip Enhanced EcoSmart , Integrated Off-Line Switcher

TOP252-262

TOPSwitch-HX Family

Enhanced EcoSmart® , Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range

Product Highlights

Lower System Cost, Higher Design Flexibility

• Multi-mode operation maximizes effi ciency at all loads

• New eSIP-7F and eSIP-7C packages

  - Low thermal impedance junction-to-case (2 °C per watt)

  - Low height is ideal for adapters where space is limited

  - Simple mounting using a clip to aid low cost manufacturing

  - Horizontal eSIP-7F package ideal for ultra low height adapter and monitor applications

  - Extended package creepage distance from DRAIN pin to adjacent pin and to heat sink

• No heatsink required up to 35 W using P, G and M packages with universal input voltage and up to 48 W at 230 VAC

• Output overvoltage protection (OVP) is user programmable for latching/non-latching shutdown with fast AC reset

  - Allows both primary and secondary sensing

• Line undervoltage (UV) detection prevents turn-off glitches

• Line overvoltage (OV) shutdown extends line surge limit

• Accurate programmable current limit

• Optimized line feed-forward for line ripple rejection

• 132 kHz frequency (254Y-258Y and all E/L packages) reduces transformer and power supply size

  - Half frequency option for video applications

• Frequency jittering reduces EMI fi lter cost

• Heatsink is connected to SOURCE for low EMI

• Improved auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions

• Accurate hysteretic thermal shutdown function automatically recovers without requiring a reset

• Fully integrated soft-start for minimum start-up stress

• Extended creepage between DRAIN and all other pins improves fi eld reliability

Figure 1. Typical Flyback Application.

EcoSmart® – Energy Efficient

• Energy efficient over entire load range

• No-load consumption

  - Less than 200 mW at 230 VAC

• Standby power for 1 W input

  - >600 mW output at 110 VAC input

  - >500 mW output at 265 VAC input

Description

TOPSwitch-HX cost effectively incorporates a 700 V power MOSFET, high voltage switched current source, PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.

Y Package Option for TOP259-261

In order to improve noise-immunity on large TOPSwitch-HX Y package parts, the F pin has been removed (TOP259-261YN are fi xed at 66 kHz switching frequency) and replaced with a SIGNAL GROUND (G) pin. This pin acts as a low noise path for the C pin capacitor and the X pin resistor. It is only required for the TOP259-261YN package parts.

Figure 2. Typical Flyback Application TOP259YN, TOP260YN and TOP261YN.

Absolute Maximum Ratings⁽²⁾

DRAIN Peak Voltage ..................................................................-0.3 V to 700 V

DRAIN Peak Current: TOP252 ................................................................0.68 A

DRAIN Peak Current: TOP253 .................................................................1.37 A

DRAIN Peak Current: TOP254 ................................................................2.08 A

DRAIN Peak Current: TOP255 .................................................................2.72 A

DRAIN Peak Current: TOP256 ................................................................4.08 A

DRAIN Peak Current: TOP257 ................................................................5.44 A

DRAIN Peak Current: TOP258 ................................................................6.88 A

DRAIN Peak Current: TOP259 ................................................................. 7.73 A

DRAIN Peak Current: TOP260 ................................................................9.00 A

DRAIN Peak Current: TOP261 ............................................................... 11.10 A

DRAIN Peak Current: TOP262 ............................................................... 11.10 A

CONTROL Voltage .......................................................................... -0.3 V to 9 V

CONTROL Current ................................................................................. 100 mA

VOLTAGE MONITOR Pin Voltage ................................................... -0.3 V to 9 V

CURRENT LIMIT Pin Voltage ....................................................... -0.3 V to 4.5 V

MULTI-FUNCTION Pin Voltage ........................................................ -0.3 V to 9 V

FREQUENCY Pin Voltage ............................................................... -0.3 V to 9 V

Storage Temperature ................................................................-65 °C to 150 °C

Operating Junction Temperature .............................................. -40 °C to 150 °C

Lead Temperature⁽¹⁾ ................................................................................260 °C

Notes:

1. 1/16 in. from case for 5 seconds.

2. Maximum ratings specifi ed may be applied one at a time without causing permanent damage to the product. Exposure to Absolute Maximum Rating conditions for extended periods of time may affect product reliability.

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