lnk562 Power Integrations, Inc., lnk562 Datasheet - Page 10

• Manufacturer Part Number: lnk562
• Description: Energy Ef?cient Off-line Switcher Ic For Linear Transformer Replacement
• Manufacturer: Power Integrations, Inc.

NOTES:
A. In a scheme using a resistor divider network at the FB pin, where R
B. Total current consumption is the sum of I
C Since the output MOSFET is switching, it is diffi cult to isolate the switching current from the supply current at the
D. See Typical Performance Characteristics section Figure 16 for BYPASS pin startup charging waveform.
E. This current is only intended to supply an optional optocoupler connected between the BYPASS and FEEDBACK
F. This parameter is guaranteed by design.
G. This parameter is derived from characterization.
H. Breakdown voltage may be checked against minimum BV
Rev. G 02/07
FEEDBACK Pin
Auto-Restart
Threshold Voltage
Auto-Restart
ON-Time
Auto-Restart
Duty Cycle
10
OUTPUT (cont.)
bias voltage and R
by V
can be used:
To determine the contribution from I
Since I
switching) and the sum of I
DRAIN. An alternative is to measure the BYPASS pin current at 6 V.
pins and not any other external circuitry.
exceeding minimum BV
Parameter
FB
and I
FB
LNK562-564
and V
FB
variations. To determine the contribution from the V
FB
are independent parameters, the composite variation in percent would be
L
is the resistor from the FB pin to the SOURCE pin, the output voltage variation is infl uenced
Symbol
DSS
V
DC
FB(AR)
.
S2
AR
and I
DSS
x
y
SOURCE = 0 V; T
FB
=
=
when FEEDBACK pin is shorted to SOURCE (MOSFET switching).
variation in percent, the following equation can be used:
(Unless Otherwise Specifi ed)
100
100
S1
#
#
and I
J
K
K
K K
L
J
K
K
K K
L
V
V
V
V
Conditions
FB MAX
See Figure 8
FB TYP
FB TYP
FB TYP
V
T
(
T
(
(
DSS
(
FB
J
J
)
= 25 °C
= 25 °C
)
)
)
= V
b
b
when FEEDBACK pin voltage is ≥2 V (MOSFET not
b
b
R
R
R
R
J
U
U
U
U
FB(AR)
R
= -40 to 125 °C
R
R
+
+
+
R
+
L
L
L
L
R
R
R
R
DSS
L
L
L
L
l
l
l
l
+
+
by ramping the DRAIN pin voltage up to but not
+
+
I
I
I
I
FB TYP
FB MAX
FB TYP
FB TYP
FB
(
(
(
(
U
variation in percent, the following equation
)
)
)
)
R
R
R
R
is the resistor from the FB pin to the rectifi ed
U
U
U
U
-
-
1
1
N
O
O
O O
P
N
O
O
O O
P
Min
Typ
100
0.8
12
!
Max
x
2
+
y
2
.
Units
ms
%
V