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Mingjiada is a professional electronic components supplier and long-term supplier of LNK6404D: energy-saving and precise primary-side regulated CV/CC switcher for adapters and chargers, belonging to LinkSwitch™-3 series.

Product Details

The LinkSwitch-3 family of integrated circuits greatly simplifies the design of low-power CV/CC chargers by eliminating the need for an optocoupler and secondary control circuit. The devices introduce a revolutionary control technique that provides very precise output voltage and current regulation, compensating for transformer and internal parameter tolerances as well as input voltage variations.

The device integrates a 725 V power MOSFET, a novel on/off control state machine, a high voltage switched current source for self-biasing, frequency dithering, cycle-by-cycle current limiting, and hysteretic thermal shutdown circuitry on a monolithic IC.

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 tolerance, input line voltage variations, and cable voltage drops

Very tight IC parameter tolerances using proprietary trimming techniques

Frequency dithering greatly reduces EMI filter costs

Programmable switching frequency up to 85 kHz to reduce transformer size

Fixed minimum operating frequency for improved transient load response

Advanced protection/safety features

Hysteretic thermal shutdown-automatic recovery reduces power return from the field

Meets high voltage creepage requirements between DRAIN and all other pins on PCB and package

EcoSmart - high energy efficiency

Easily meets all global energy efficiency regulations without adding components

No-load power consumption at 230 VAC input (with bias winding) <30 mW

Green Packaging

Halogen-free and RoHS compliant

Specification

Output Power (Max) - Enclosed, Univ: 3.50 W

Output Power (Max) - Open, Univ: 4.10 W

Switching Frequency (min): 60.00 kHz

Switching frequency (max): 85 kHz

Breakdown Voltage: 725 V

Voltage - Input (Min): 90 V

Voltage - input (max): 264 V

Cable Voltage Drop Compensation: 1.02

IC Package: SO-8C

Internal Switch: Yes

Mounting Type: Surface Mount

Over Temperature Response Hysteresis

Temperature - Operating (min): -40 °C

Temperature - Operating (max): 150 °C

Control scheme Primary side

Control Function

Cable drop compensation

Optional current limiting

Frequency dither

Programmable switching frequency

Automatic restart/blocking fault response

On/Off Control

Protection Functions

Output open loop

Output Short Circuit

Over Temperature

Output curve: CV/CC

Topology: Flyback

Product Subtype: PMIC