LNK306P/G/D datasheet, PDF - EEWORLD Datasheet

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LNK306P/G/D: DescriptionLowest Component Count, Energy-Effi cient Off-Line Switcher IC; File Size760KB，20 Pages; ManufacturerFERYSTER; Websitehttp://www.feryster.com/

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LNK306P/G/D Overview

Lowest Component Count, Energy-Effi cient Off-Line Switcher IC

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LNK302/304-306

LinkSwitch-TN

Family

Lowest Component Count, Energy-Efﬁcient

Off-Line Switcher IC

Product Highlights

Cost Effective Linear/Cap Dropper Replacement

• Lowest cost and component count buck converter solution

• Fully integrated auto-restart for short-circuit and open

loop fault protection – saves external component costs

• LNK302 uses a simpliﬁed controller without auto-restart

for very low system cost

• 66 kHz operation with accurate current limit – allows low cost

off-the-shelf 1 mH inductor for up to 120 mA output current

• Tight tolerances and negligible temperature variation

• High breakdown voltage of 700 V provides excellent

input surge withstand

• Frequency jittering dramatically reduces EMI (~10 dB)

– minimizes EMI

ﬁ

lter cost

• High thermal shutdown temperature (+135

°C

minimum)

Much Higher Performance over Discrete Buck and

Passive Solutions

• Supports buck, buck-boost and

ﬂ

yback topologies

• System level thermal overload, output short-circuit and

open control loop protection

• Excellent line and load regulation even with typical

conﬁguration

• High bandwidth provides fast turn-on with no overshoot

• Current limit operation rejects line ripple

• Universal input voltage range (85 VAC to 265 VAC)

• Built-in current limit and hysteretic thermal protection

• Higher efﬁciency than passive solutions

• Higher power factor than capacitor-fed solutions

• Entirely manufacturable in SMD

EcoSmart

– Extremely Energy Efﬁcient

• Consumes typically only 50/80 mW in self-powered buck

topology at 115/230 VAC input with no load (opto feedback)

• Consumes typically only 7/12 mW in

ﬂ

yback topology

with external bias at 115/230 VAC input with no load

• Meets California Energy Commission (CEC), Energy

Star, and EU requirements

Wide Range

HV DC Input

Output

LinkSwitch-TN

PI-3492-111903

Figure 1. Typical Buck Converter Application (See Application

Examples Section for Other Circuit Conﬁgurations).

OUTPUT CURRENT TABLE

PRODUCT

LNK302P/G/D

230 VAC ±15%

MDCM

63 mA

CCM

80 mA

170 mA

280 mA

360 mA

85-265 VAC

MDCM

63 mA

CCM

80 mA

LNK304P/G/D 120 mA

LNK305P/G/D 175 mA

LNK306P/G/D 225 mA

Table 1. Output Current Table.

120 mA 170 mA

175 mA 280 mA

225 mA 360 mA

Notes:

1. Typical output current in a non-isolated buck converter. Output power

capability depends on respective output voltage. See Key Applications

Considerations Section for complete description of assumptions,

including fully discontinuous conduction mode (DCM) operation.

2. Mostly discontinuous conduction mode.

3. Continuous conduction mode.

4. Packages: P: DIP-8B, G: SMD-8B, D: SO-8C.

Applications

• Appliances and timers

• LED drivers and industrial controls

Description

LinkSwitch-TN

is speciﬁcally designed to replace all linear and

capacitor-fed (cap dropper) non-isolated power supplies in the

under 360 mA output current range at equal system cost while

offering much higher performance and energy efﬁciency.

LinkSwitch-TN

devices integrate a 700 V power MOSFET,

oscillator, simple On/Off control scheme, a high voltage switched

current source, frequency jittering, cycle-by-cycle current limit

and thermal shutdown circuitry onto a monolithic IC. The start-

up and operating power are derived directly from the voltage

on the DRAIN pin, eliminating the need for a bias supply and

associated circuitry in buck or

ﬂ

yback converters. The fully

integrated auto-restart circuit in the LNK304-306 safely limits

output power during fault conditions such as short-circuit or

open loop, reducing component count and system-level load

protection cost. A local supply provided by the IC allows use

of a non-safety graded optocoupler acting as a level shifter to

further enhance line and load regulation performance in buck

and buck-boost converters, if required.

December 2006

LNK306P/G/D Related Products

	LNK306P/G/D	LNK304-306
Description	Lowest Component Count, Energy-Effi cient Off-Line Switcher IC	Lowest Component Count, Energy-Effi cient Off-Line Switcher IC

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