Rev. F 05/18

8

LinkSwitch-4

www.power.com

Figure 10. Typical Universal Input, 10 W Charger.

Parameter

Symbol

Range or Value

Units

Comment

Supply Voltage

V

IN

85 - 265

VAC

Universal mains

Output Voltage

V

OUT(CV)

5.0 ± 5%

V

Constant voltage (CV) mode, at the load

Output Current

I

OUT

2

A

Label rated output current

Switching Frequency at Full Load

f

MAX

65

kHz

Cable Compensation

G

CAB

6

%

Determined by the chosen variant

No-load Power

P

NL

<30

mW

Energy Star test method

Average Efficiency

η

>75

%

Energy Star test method

Turn-on Delay

T

ON

<1

s

Undershoot Voltage

V

UNDERSHT

>4

V

Load step from 0 A to 0.5 A

By sensing the primary-side waveforms of transformer voltage and

primary current, the LinkSwitch-4 achieves constant voltage and

constant current output within tight limits without the need for any

secondary-side sensing components. Figure 11 shows the output

characteristics of a typical charger implementation.

Typical Application for LNK40x3D

PI-7679-071515

LNK40x3D

~

GND

BD

ED

CS

VCC

SBD

FB

+

2 × RHT

Q1

LFILT

DBRIDGE

RCS

RCS2

RSBD

RFB2

ROUT

COUT

DOUT

RFB1

T1

CVCC

RIN

CIN1

CIN2

Table 4. 10 W Typical Application Results for Figure 10.