LNK64x4-64x8
ꢉꢃꢈꢊN
ꢆꢉꢇ
ꢃꢅꢋꢂLꢈꢎꢁꢃ
6 ꢏ
ꢌꢐꢑꢈꢀꢀ
ꢆꢌꢑꢇ
ꢍ
-
6 ꢌ
ꢄ ꢌ
ꢅꢆ
ꢇꢈꢉ
ꢍ
Reꢊeꢋ
ꢌꢁꢐꢁꢏꢁꢉ
ꢉ
ꢖ
ꢀꢎꢈꢎꢅ
ꢓꢈꢄꢔꢊNꢅ
ꢒꢅꢅꢉꢌꢈꢄK
ꢆꢒꢌꢇ
ꢌꢉꢓ
-
ꢋꢍꢎꢏꢀꢐꢑꢂꢇꢈꢉ
ꢁꢐꢁꢏ
ꢔCꢏꢎꢗ
ꢔꢕꢖve
ꢌꢁꢐꢁꢏꢁꢉ
ꢄꢈꢌLꢅ ꢉꢃꢁꢑ
ꢄꢁꢓꢑꢅNꢀꢈꢎꢊꢁN
ꢒꢈꢂLꢎ
ꢈꢂꢎꢁ-ꢃꢅꢀꢎꢈꢃꢎ
ꢁꢑꢅN-Lꢁꢁꢑ
ꢅꢆ
6.ꢄ ꢌ
ꢎꢔꢅꢃꢓꢈL
ꢀꢔꢂꢎꢉꢁꢕN
ꢊNꢉꢂꢄꢎꢈNꢄꢅ
ꢄꢁꢃꢃꢅꢄꢎꢊꢁN
ꢔCꢏꢎꢗ
ꢋꢍꢎꢏꢀꢐꢑꢂꢁꢒꢀꢈꢉ
ꢋꢍꢎꢏꢀꢐꢑꢂꢇꢈꢉ
ꢀꢈꢓꢑLꢅ
ꢉꢅLꢈꢐ
ꢋꢍꢎꢏꢀꢐꢑꢂꢁꢒꢀꢈꢉ
ꢁꢀꢄꢊLLꢈꢎꢁꢃ
ꢀꢁꢂꢃꢄꢅ
ꢆꢀꢇ
ꢍ
-
ꢁꢐꢁꢏ
ꢀꢁꢂꢃꢄꢅ
ꢆꢀꢇ
ꢌꢁꢐꢁꢏꢁꢉ
ꢄꢁNꢀꢎꢈNꢎ
ꢄꢂꢃꢃꢅNꢎ
Cꢘꢕꢕeꢙꢋ ꢐꢖꢚꢖꢋ
Cꢛꢚꢜꢝꢕꢝꢋꢛꢕ
LꢅꢈꢉꢊNꢋ
ꢅꢉꢋꢅ
ꢌLꢈNKꢊNꢋ
ꢀꢁꢂ6660ꢂ0ꢃ0ꢄ1ꢄ
Figure 2
Functional Block Diagram.
Pin Functional Description
ꢌ ꢈꢒꢖꢗꢒꢡꢐ
ꢓꢐꢂꢚꢈ-ꢅꢉꢙ
DRAIN (D) Pin:
This pin is the power MOSFET drain connection. It provides
internal operating current for both start-up and steady-state
operation.
ꢌxꢍꢎꢏꢐꢑ ꢈꢒꢑ
ꢓꢔꢕ ꢇꢒꢖꢗ ꢂꢘꢑꢐꢙ
ꢚꢕꢛꢐꢜꢕꢒꢝꢝꢞ
ꢉꢎꢕꢕꢐꢖꢛꢐꢑ ꢛꢎ
ꢂꢔꢟꢠꢉꢌ ꢈꢘꢕ
BYPASS (BP) Pin:
ꢋ ꢈꢒꢖꢗꢒꢡꢐ ꢓꢂꢔ-8ꢉꢙ
This pin is the connection point for an external 1 mF bypass capacitor
for the internally generated 6 V supply.
ꢆꢇ ꢀ
8 ꢂ
ꢅ ꢂ
6 ꢂ
ꢣ ꢂ
FEEDBACK (FB) Pin:
ꢇꢈ ꢁ
ꢀ ꢁ ꢊ 4 ꢣ
ꢅ
During normal operation, switching of the power MOSFET is
controlled by this pin. This pin senses the AC voltage on the
bias winding. This control input regulates both the output
voltage in CV mode and output current in CC mode based on
the flyback voltage of the bias winding. The internal induc-
tance correction circuit uses the forward voltage on the bias
winding to sense the bulk capacitor voltage.
ꢋ 4
ꢌxꢍꢎꢏꢐꢑ ꢈꢒꢑ ꢓꢔꢕ ꢇꢎꢛꢛꢎꢢꢙ
ꢚꢕꢛꢐꢜꢕꢒꢝꢝꢞ ꢉꢎꢕꢕꢐꢖꢛꢐꢑ ꢛꢎ
ꢂꢔꢟꢠꢉꢌ ꢈꢘꢕ
K ꢈꢒꢖꢗꢒꢡꢐ
ꢓꢐꢂꢔꢈ-ꢀꢁꢇꢙ
ꢆꢇ ꢀ
ꢇꢈ ꢁ
Nꢉ ꢊ
Nꢉ 4
ꢀꢁ ꢂ
ꢀꢀ ꢂ
ꢀꢃ ꢂ
ꢄ ꢂ
SOURCE (S) Pin:
This pin is internally connected to the output MOSFET source
for high-voltage power and control circuit common returns.
8 ꢂ
ꢋ 6
ꢅ ꢂ
ꢀꢁꢂ6ꢃ06ꢂ0ꢄ0ꢅ1ꢅ
Figure 3. Pin Configuration.
2
Rev. C 03/16
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