Lowest Cost, Low Power Switcher Solution

• Lower cost than RCC, discrete PWM and other integrated/

hybrid solutions

• Cost effective replacement for bulky linear adapters

• Lowest component count

• Simple ON/OFF control – no loop compensation devices

• No bias winding – simpler, lower cost transformer

• Allows simple RC type EMI filter for up to 2 W from

universal input or 4 W from 115 VAC input

Extremely Energy Efficient

• Consumes only 30/60 mW at 115/230 VAC with no load

• Meets Blue Angel, Energy Star, Energy 2000 and 200 mW

European cell phone requirements for standby

• Saves $1 to $4 per year in energy costs (at $0.12/kWHr)

compared to bulky linear adapters

• Ideal for cellular phone chargers, standby power supplies for

PC, TV and VCR, utility meters, and cordless phones.

High Performance at Low Cost

• High-voltage powered – ideal for charger applications

• Very high loop bandwidth provides excellent transient

response and fast turn on with practically no overshoot

• Current limit operation rejects line frequency ripple

• Glitch free output when input is removed

• Built-in current limit and thermal protection

• 44 kHz operation (TNY253/4) with snubber clamp

reduces EMI and video noise in TVs and VCRs

• Operates with optocoupler or bias winding feedback