LinkSwitch-4
ꢈꢉꢉꢊRꢋꢌꢍ
ꢈꢉꢉ
ꢈꢉLꢊꢋꢌꢍ SꢎꢀꢀLꢏ
ꢐꢈꢑꢑꢒ
ꢈꢔꢔ ꢕꢍꢌꢎLꢋꢊꢉꢕ
ꢓFꢔꢕꢖꢊꢑꢗꢍ
Reꢀeꢁ
ꢂꢃꢄꢅꢆꢇ
ꢈꢓꢐ
ꢕꢍSꢍꢊ ꢑꢁꢕꢑꢎꢁꢊ
SꢎꢀꢀLꢍꢖꢍꢗꢊꢋꢕꢏ
ꢓꢋSꢍ ꢔꢕꢁꢈꢍ
ꢐSꢓꢔꢒ
ꢓFꢔꢕꢖꢊꢂꢖꢘRꢖꢍ
ꢏꢈꢒ
ꢈꢈꢎꢎꢊRꢏꢐꢍ
ꢈꢈꢎꢎꢊꢂꢑꢋꢋꢒꢍ
ꢈꢛꢊ ꢍSꢊꢁꢖꢋꢊꢉꢕ
ꢑꢏꢑLꢍ
ꢊꢁꢖꢁꢗꢌ
ꢊꢛꢍꢕꢖꢋL
Sꢛꢎꢊꢔꢉꢚꢗ
ꢘꢍꢍꢔꢓꢋꢑꢙ
ꢐꢘꢓꢒ
ꢈꢗꢏꢖ
ꢗꢈꢒ
ꢑꢈ ꢈꢉLꢊꢋꢌꢍ
ꢑꢉꢗꢊꢕꢉL
ꢓꢋSꢍ ꢔꢕꢁꢈꢍ
ꢐꢓꢔꢒ
ꢈꢗꢈꢒ
Sꢚꢁꢊꢑꢛ
ꢀꢘꢖꢜꢀꢚꢖ
ꢑꢋꢓLꢍ
ꢑꢉꢖꢀꢍꢗSꢋꢊꢁꢉꢗ
ꢍꢖꢁꢊꢊꢍꢕ ꢔꢕꢁꢈꢍ
ꢐꢍꢔꢒ
ꢑꢑ ꢑꢎꢕꢕꢍꢗꢊ
ꢑꢉꢗꢊꢕꢉL
ꢑꢎꢕꢕꢍꢗꢊ
SꢍꢗSꢍ
ꢐꢑSꢒ
ꢌꢕꢉꢎꢗꢔ
ꢐꢌꢗꢔꢒ
ꢈꢎꢂꢖꢕR
ꢑS
ꢑS ꢓLꢋꢗꢙꢁꢗꢌ
ꢉꢑꢀ
ꢈꢎꢙꢘꢚ
ꢀꢁ-ꢂ4ꢃꢄ-ꢅꢆꢆꢅꢇꢄ
Figure 5.
LNK40x3D, LNK4323D, LNK40x4D, LNK4114D, LNK4115D and LNK4215D Functional Block Diagram.
Pin Functional Description
D Package (SO-8)
(LNK40x3D, LNK4323D)
S Package (SOT-23-6)
VOLTAGE SUPPLY (VCC) Pin:
During Run mode, power derived from the transformer voltage
supply winding is fed to the control circuitry via the VOLTAGE
SUPPLY pin.
1
2
3
6
5
4
FB
GND
ED
CS
1
2
3
4
8
7
6
5
FB
CS
VCC
BD
GND
VCC
BASE DRIVE (BD) Pin:
BASE DRIVE pin for BJT.
GND
ED
SBD
BD
EMITTER DRIVE (ED) Pin:
EMITTER DRIVE pin for BJT.
D Package (SO-8)
(LNK40x4D, LNK4114D, LNK4214D,
LNK4115D, LNK4215D)
FEEDBACK (FB) Pin:
The FEEDBACK pin input provides feedback to the control
circuitry by monitoring the transformer voltage waveform.
1
2
3
4
8
7
6
5
FB
CS
GROUND (GND) Pin:
Power and signal ground.
GND
VCC
Primary CURRENT SENSE (CS) Pin:
Primary CURRENT SENSE pin via RCS.
GND
ED
BD
SBD
SUPPLEMENTARY BASE DRIVE (SBD) Pin:
Supplementary base drive.
PI-7673-061516
Figure 6. Pin Configuration.
3
Rev. F 05/18
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