LNK562-564
®
LinkSwitch-LP
Energy Efficient Off-Line Switcher IC for
Linear Transformer Replacement
Product Highlights
+
DC
Output
Lowest System Cost and Advanced Safety Features
AC
IN
•
•
Lowest component count switcher
Very tight parameter tolerances using proprietary IC
trimming technology and transformer construction
techniques enable Clampless™designs – decreases
component count/system cost and increases efficiency
Meets industry standard requirements for thermal overload
protection – eliminates the thermal fuse used with linear
transformers or additional components in RCC designs
Frequency jittering greatly reduces EMI – enables low cost
input filter configuration
D
S
FB
BP
LinkSwitch-LP
•
(a)
PI-3923-092705
•
•
•
VO
VR
Meets HV creepage requirements between DRAIN and all
other pins, both on the PCB and at the package
Proprietary E-Shield™ transformer eliminates Y-capacitor
Rated Output Power = VR • IR
Superior Performance over Linear and RCC
•
Hysteretic thermal shutdown protection – automatic
recovery improves field reliability
•
•
Universal input range allows worldwide operation
Auto-restart reduces delivered power by >85% during
short circuit and open loop fault conditions
IR
IO
(b)
PI-3924-011706
•
•
Simple ON/OFF control, no loop compensation needed
High bandwidth provides fast turn on with no overshoot
and excellent transient load response
Figure 1. Typical Application – not a Simplified Circuit (a) and
Output Characteristic Envelope (b).
EcoSmart®– Energy Efficiency Technology
OUTPUT POWER TABLE1
•
Easily meets all global energy efficiency regulations with
230 VAC ±15%
85-265 VAC
no added components
PRODUCT4
Open
Adapter2
Open
•
•
No-load consumption <150 mW at 265 VAC input
ON/OFF control provides constant efficiency to very
light loads – ideal for mandatory CEC regulations
Adapter2
Frame3
Frame3
1.9 W
2.5 W
3 W
LNK562P/G/D 1.9 W
LNK563P/G/D 2.5 W
1.9 W
2.5 W
3 W
1.9 W
2.5 W
3 W
Applications
•
Chargers for cell/cordless phones, PDAs, power tools,
MP3/portable audio devices, shavers etc.
Standby and auxiliary supplies
LNK564P/G/D
3 W
Table 1. Output Power Table.
•
Notes:
1. Output power may be limited by specific application parameters
including core size and Clampless operation (see Key Application
Considerations).
2. Minimum continuous power in a typical non-ventilated enclosed
adapter measured at 50 °C ambient.
3. Minimum practical continuous power in an open frame design with
adequate heat sinking, measured at 50 °C ambient.
4. Packages: P: DIP-8B, G: SMD-8B, D: SO-8C. For lead-free
package options, see Part Ordering Information.
Description
LinkSwitch-LP switcher ICs cost effectively replace all
unregulatedisolatedlineartransformerbased(50/60Hz)power
supplies up to 3 W output power. For worldwide operation, a
singleuniversalinputdesignreplacesmultiple lineartransformer
baseddesigns.Theself-biasedcircuitachievesanextremelylow
no-load consumption of under 150 mW. The internal oscillator
frequencyisjitteredtosignificantlyreducebothquasi-peakand
average EMI, minimizing filter cost.
November 2008
POWERINT [ Power Integrations ]
