Applications
• Chargers for cell/cordless phones, PDAs, MP3/portable audio
devices, adapters, networking, etc.
Description
The LinkSwitchTM-4 family of ICs dramatically simplifies low power CV/CC
charger design by eliminating an optocoupler and secondary control
circuitry. The LinkSwitch-4 family adaptive BJT drive technology uses
combined base and emitter switching to boost switching performance
and deliver higher efficiency, wider Reverse Bias Safe Operating Area
(RBSOA) margin and the flexibility to accommodate a wide range of low
cost BJT. The device incorporates a multimode PWM/PFM controller
with quasi resonant switch to maximize the efficiency, meets low
no-load power and at same time maintain fast transient response
greater than 4.3 V with a load change from 0% to 100%.