LNK363DN Datasheet, PDF (2/16 Pages) Power Integrations, Inc. – Energy Effi cient, Low Power Off-Line Switcher IC

LNK362-364
BYPASS
(BP)
FAULT
PRESENT
AUTO-
RESTART
COUNTER
CLOCK
RESET
6.3 V
FEEDBACK
(FB)
V_FB -V_TH
JITTER
CLOCK
DC_MAX
OSCILLATOR
Figure 2. Functional Block Diagram.
REGULATOR
5.8 V
DRAIN
(D)
5.8 V
4.8 V
BYPASS PIN
UNDER-VOLTAGE
+
-
CURRENT LIMIT
COMPARATOR
VI_LIMIT
THERMAL
SHUTDOWN
SQ
RQ
LEADING
EDGE
BLANKING
SOURCE
(S)
PI-4232-110205
Pin Functional Description
DRAIN (D) Pin:
Power MOSFET drain connection. Provides internal operating
current for both startup and steady-state operation.
BYPASS (BP) Pin:
Connection point for a 0.1 μF external bypass capacitor for the
internally generated 5.8 V supply. If an external bias winding is
used, the current into the BP pin must not exceed 1 mA.
FEEDBACK (FB) Pin:
During normal operation, switching of the power MOSFET is
controlled by this pin. MOSFET switching is disabled when a
current greater than 49 μA is delivered into this pin.
SOURCE (S) Pin:
This pin is the power MOSFET source connection. It is also the
ground reference for the BYPASS and FEEDBACK pins.
P Package (DIP-8B)
G Package (SMD-8B)
S1
S2
8S
7S
BP 3
FB 4
5D
3a
Figure 3. Pin Configuration.
D Package (SO-8C)
BP 1
FB 2
D⁴
8S
7S
6S
5_S
3b
PI-3491-120706
2₂₂-2
Rev. E 11/08