LNK562 Datasheet, PDF (1/16 Pages) Power Integrations, Inc. – Energy Effi cient Off-Line Switcher IC for Linear Transformer Replacement

LNK562-564
LinkSwitch^®-LP
Energy Efficient Off-Line Switcher IC for
Linear Transformer Replacement
Product Highlights
Lowest System Cost and Advanced Safety Features
• 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
• 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
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
• Simple ON/OFF control, no loop compensation needed
• High bandwidth provides fast turn on with no overshoot
and excellent transient load response
EcoSmart^®– Energy Efficiency Technology
• Easily meets all global energy efficiency regulations with
no added components
• No-load consumption <150 mW at 265 VAC input
• ON/OFF control provides constant efficiency to very
light loads – ideal for mandatory CEC regulations
Applications
• Chargers for cell/cordless phones, PDAs, power tools,
MP3/portable audio devices, shavers etc.
• Standby and auxiliary supplies
Description
LinkSwitch-LP switcher ICs cost effectively replace all
unregulated isolated linear transformer based (50/60 Hz) power
supplies up to 3 W output power. For worldwide operation, a
single universal input design replaces multiple linear transformer
based designs. The self-biased circuit achieves an extremely low
no-load consumption of under 150 mW. The internal oscillator
AC
IN
+ _DC
Output
LinkSwitch-LP
D
FB
BP
S
(a)
PI-3923-092705
V_O
Rated Output Power = V_R • I_R
V_R
I_R
I_O
(b) _{PI-3924-011706}
Figure 1. Typical Application – not a Simplified Circuit (a) and
Output Characteristic Envelope (b).
OUTPUT POWER TABLE¹
PRODUCT⁴
230 VAC ±15%
85-265 VAC
Adapter²
Open
Frame³
Adapter²
Open
Frame³
LNK562P or G 1.9 W 1.9 W 1.9 W 1.9 W
LNK563P or G 2.5 W 2.5 W 2.5 W 2.5 W
LNK564P or G 3 W
3W
3W 3W
Table 1. 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. For lead-free package options, see Part Ordering
Information.
frequency is jittered to significantly reduce both quasi-peak and
average EMI, minimizing filter cost.
October 2005