pks603 Power Integrations, Inc., pks603 Datasheet - Page 2

• Manufacturer Part Number: pks603
• Description: Enhanced, Energy-eficient, Off-line Switcher Ic With Super Peak Power Performance
• Manufacturer: Power Integrations, Inc.

Pin Functional Description
DRAIN (D) Pin:
The power MOSFET drain connection provides internal
operating current for both startup and steady-state operation.
BYPASS (BP) Pin:
A 0.33 µF external bypass capacitor for the internally generated
5.8 V supply is connected to this pin. In typical applications,
this pin must be externally supplied via a bias winding.
ENABLE/UNDER-VOLTAGE (EN/UV) Pin:
This pin has dual functions: enable input and line under-voltage
sense. During normal operation, switching of the power MOSFET
is controlled by this pin. MOSFET switching is disabled when a
current greater than 240 µA is drawn from this pin. This pin may
also sense line under-voltage conditions through either an
external resistor connected to the DC line voltage or an AC
sense circuit.
SOURCE (S) Pin:
This is the MOSFET source connection for high voltage return
and control circuit common.
Rev. I 02/07
Figure 2. Functional Block Diagram.
240 µA
VOLTAGE
2
BYPASS
ENABLE/
UNDER-
(EN/UV)
(BP)
PKS603-607
ENABLE
1.0 V + V
1.0 V
25 µA
T
6.3 V
LINE UNDER-VOLTAGE
OSCILLATOR
ON TIME EXT
LATCH OFF/
JITTER
COUNTER
RESTART
DC MAX
CLOCK
AUTO-
RESET
PRESENT
FAULT
GROUND (GND) Pin (Y or F Package Only):
This is the signal ground for the bypass capacitor and
optocoupler.
LIMIT STATE
Figure 3. Pin Configuration.
EN/UV
MACHINE/
ADAPTIVE
CURRENT
CURRENT
LIMIT
BP
D
P Package (DIP-8C)
Tab Internally
Connected to
SOURCE Pin
4
2
1
R
S
SHUTDOWN
THERMAL
5.8 V
4.8 V
Q
Q
+
-
Y Package (TO-220-7C)
BYPASS PIN
UNDER-VOLTAGE
8
7
6
5
REGULATOR
S
S
S
S
5.8 V
CURRENT LIMIT
COMPARATOR
BLANKING
LEADING
F Package (TO-262-7C)
EDGE
V
I LIMIT
+
-
GROUND (GND)
(Y & F Package
PI-3940-040606
PI-3941-031506
SOURCE
DRAIN
Only)
7 D
5 NC
4 S
3 EN/UV
2 GND
1 BP
(D)
7 D
5 NC
4 S
3 EN/UV
2 GND
1 BP
(S)