lnk362 Power Integrations, Inc., lnk362 Datasheet - Page 2

• Manufacturer Part Number: lnk362
• Description: Energy Ef?cient, Low Power Off-line Switcher Ic
• Manufacturer: Power Integrations, Inc.

Rev. D 02/07
Figure 2. Functional Block Diagram.
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.
2-2
2
2
FEEDBACK
BYPASS
(FB)
(BP)
LNK362-364
V
FB
-V
TH
6.3 V
OSCILLATOR
JITTER
COUNTER
RESTART
CLOCK
AUTO-
DC
CLOCK
RESET
MAX
PRESENT
FAULT
5.8 V
4.8 V
Figure 3. Pin Confi guration.
SHUTDOWN
THERMAL
BP
FB
G Package (SMD-8B)
P Package (DIP-8B)
S
S
+
-
S
R
1
2
3
4
BYPASS PIN
UNDER-VOLTAGE
Q
Q
3a
REGULATOR
5.8 V
8
7
5
S
D
S
CURRENT LIMIT
COMPARATOR
BLANKING
LEADING
EDGE
D Package (SO-8C)
BP
FB
D
+
-
1
2
4
V I
LIMIT
3b
PI-4232-110205
PI-3491-120706
SOURCE
8
7
6
5
DRAIN
(D)
(S)
S
S
S
S