LNK605PG Datasheet, PDF (1/18 Pages) Power Integrations, Inc. – Energy-Efficient, Accurate CV/CC Switcher for Adapters and Chargers

LNK603-606/613-616
LinkSwitch^®-II Family
Energy-Efficient, Accurate CV/CC Switcher
for Adapters and Chargers
Product Highlights
Dramatically Simplifies CV/CC Converters
• Eliminates optocoupler and all secondary CV/CC control circuitry
• Eliminates all control loop compensation circuitry
Advanced Performance Features
• Compensates for transformer inductance tolerances
• Compensates for input line voltage variations
• Compensates for cable voltage drop (LNK61X series)
• Compensates for external component temperature variations
• Very tight IC parameter tolerances using proprietary trimming
technology
• Frequency jittering greatly reduces EMI filter cost
• Even tighter output tolerances achievable with external resistor
selection/trimming
• Programmable switching frequency up to 85 kHz to reduce
transformer size
Advanced Protection/Safety Features
• Auto-restart protection reduces power delivered by >95% for
output short circuit and control loop faults (open and shorted
components)
• Hysteretic thermal shutdown – automatic recovery reduces
power supply returns from the field
• Meets high voltage creepage requirements between DRAIN and
all other pins both on the PCB and at the package
EcoSmart^® – Energy Efficient
• Easily meets all global energy efficiency regulations
• No-load consumption below 30 mW at 230 VAC with optional
external bias winding
• ON/OFF control provides constant efficiency down to very light
loads – ideal for CEC and ENERGY STAR 2.0 regulations
• No current sense resistors – maximizes efficiency
Green Package
• Halogen free and RoHS compliant package
Applications
• Chargers for cell/cordless phones, PDAs, MP3/portable audio
devices, adapters, LED drivers, etc.
Description
The LinkSwitch-II dramatically simplifies low power CV/CC
charger designs by eliminating an optocoupler and secondary
control circuitry. The device introduces a revolutionary control
technique to provide very tight output voltage and current
regulation, compensating for transformer and internal parameter
tolerances along with input voltage variations.
Wide Range
High Voltage
DC Input
D
LinkSwitch-II
S
FB
BP/M
PI-4960-011510
(a) Typical Application Schematic
V_O
±5%
±10%
PI-4906-041008
I_O
(b) Output Characteristic
Figure 1. Typical Application/Performance – Not a Simplified Circuit (a) and
Output Characteristic Envelope (b). (see Application Section for

more information).
Output Power Table
Product³
LNK603/613PG/DG
LNK604/614PG/DG
LNK605/615PG/DG
LNK606/616PG/GG/DG
85-265 VAC
Adapter¹
Open Frame²
2.5 W
3.3 W
3.5 W
4.1 W
4.5 W
5.1 W
5.5 W
6.1 W
Table 1. Output Power Table.
Notes:
1. Minimum continuous power in a typical non-ventilated enclosed adapter
measured at +50 °C ambient, device, T_J <100 °C.
2. Maximum practical continuous power in an open frame design with adequate
heatsinking, measured at 50 °C ambient (see Key Applications Considerations
section for more information).
3. Packages: P: DIP-8C, G: SMD-8C, D: SO-8C.
The device incorporates a 700 V power MOSFET, a novel ON/OFF
control state machine, a high voltage switched current source for
self biasing, frequency jittering, cycle-by-cycle current limit and
hysteretic thermal shutdown circuitry onto a monolithic IC.
www.powerint.com
January 2010