lnk623 Power Integrations, Inc., lnk623 Datasheet

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lnk623

Manufacturer Part Number
lnk623
Description
Energy-efficient, Off-line Switcher With Accurate Primary-side Constant-voltage Cv Control
Manufacturer
Power Integrations, Inc.
Datasheet

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LNK623-626
LinkSwitch-CV Family
Energy-Effi cient, Off-line Switcher with Accurate
Primary-side Constant-Voltage (CV) Control
Product Highlights
Dramatically Simplifi es CV Converters
Advanced Performance Features
Advanced Protection/Safety Features
EcoSmart
Green Package
Applications
Description
The LinkSwitch-CV dramatically simplifies low power, constant
voltage (CV) converter design through a revolutionary control
technique which eliminates the need for both an optocoupler and
secondary CV control circuitry while providing very tight output
voltage regulation. The combination of proprietary IC trimming
and E-Shield™ transformer construction techniques enables
Clampless™ designs with the LinkSwitch-CV LNK623/4.
www.powerint.com
Eliminates optocoupler and all secondary CV control circuitry
Eliminates bias winding supply – IC is self biasing
Compensates for external component temperature variations
Very tight IC parameter tolerances using proprietary trimming
technology
Continuous and/or discontinuous mode operation for design
fl exibility
Frequency jittering greatly reduces EMI fi lter cost
Even tighter output tolerances achievable with external resistor
selection/trimming
Auto-restart protection reduces delivered power by >95% for
output short circuit and all control loop faults (open and shorted
components)
Hysteretic thermal shutdown – automatic recovery reduces
power supply returns from the fi eld
Meets HV creepage requirements between Drain and all other
pins, both on the PCB and at the package
No-load consumption <200 mW at 230 VAC and down to
below 70 mW with optional external bias
Easily meets all global energy effi ciency regulations with no
added components
ON/OFF control provides constant effi ciency down to very light
loads – ideal for mandatory EISA and ENERGY STAR 2.0
regulations
No primary or secondary current sense resistors – maximizes
effi ciency
Halogen free and RoHS compliant package
DVD/STB
Adapters
Standby and auxiliary supplies
Home appliances, white goods and consumer electronics
Industrial controls
®
– Energy Effi cient
®
Output Power Table
LinkSwitch-CV provides excellent cross-regulation for multiple-
output flyback applications such as DVDs and STBs. A 700 V
power MOSFET and ON/OFF control state machine, self-biasing,
frequency jittering, cycle-by-cycle current limit, and hysteretic
thermal shutdown circuitry are all incorporated onto one IC.
Figure 1.
Table 1.
Notes:
1. Minimum continuous power in a typical non-ventilated enclosed adapter
2. Maximum practical continuous power in an open frame design with adequate
3. Packages: P: DIP-8C, D: SO-8C.
LNK623PG/DG
LNK624PG/DG
LNK625PG/DG
LNK626PG
measured at +50 °C ambient.
heatsinking, measured at 50 °C ambient (see Key Application Considerations
section for more information).
Product
Output Power Table. Based on 5 V Output.
HV DC Input
Wide Range
Typical Application Schematic (a) and Output Characteristic Envelope (b).
*Optional with LNK623-624PG/DG. (see Key Application Considerations section for
clamp and other external circuit design considerations).
V
O
*
3
LinkSwitch-CV
(a) Typical Application Schematic
(b) Output Characteristic
Adapter
10.5 W
6.5 W
7 W
8 W
230 VAC ±15%
±5%
1
PI-5196-080408
Peak or
Frame
13.5 W
Open
11 W
17 W
9 W
2
PI-5195-080808
Adapter
5.0 W
5.5 W
6.5 W
8.5 W
85-265 VAC
I
O
1
December 2008
Peak or
Frame
6.5 W
Open
10 W
6 W
8 W
2

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