an8038 Panasonic Corporation of North America, an8038 Datasheet - Page 5

• Manufacturer Part Number: an8038
• Description: Ac-dc Switching Power Supply Control Ic With Rcc Local Resonance Circuit For Improved Conformance With Energy Conservation Laws
• Manufacturer: Panasonic Corporation of North America

Voltage Regulators
Pin No.
Low-voltage protection (U.V.L.O.)
start/stop supply voltage difference
Transformer reset (TR) detection
threshold hysteresis width
Oscillator (CF) upper limit voltage
Oscillator (CF) lower limit voltage 1
Oscillator (CF) lower limit voltage 2
Maximum on-period
Minimum off-period 1
Minimum off-period 2
Light-load oscillator frequency
Output rise time
Output fall time
TR output response time
CLM output response time
Circuit current during startup 2
Design Reference Data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Electrical Characteristics at V
Terminal Equivalent Circuits
1
Parameter
V
REF
7 V
TR
1
High-side
clamp
Equivalent Circuit
Low-side
clamp
CC
TR V
t
t
Symbol
t
OFF(min)1
OFF(min)2
I
ON(max)
V
V
START2
V
f
t
OSC2
CLM
t
V
CFL1
CFL2
CLH
TR
t
t
r
f
CC
18 V, T
TH
I
I
I
I
V
I
V
I
I
I
I
10% to 90%, I
10% to 90%, I
T
IFB
IFB
IFB
IFB
IFB
IFB
TR
IFB
TR
a
a
TR
TR
25 C (continued)
30 C to 85 C
0.1 V
0.1 V
450 A
450 A
1.3 mA, C
1.3 mA, C
TR:
Transformer reset detection input.
When a transformer reset is detected, i.e., a low
level is input to this pin, the IC output goes high.
However, the transformer reset signal is ignored
if the signal is shorter than the minimum off-
period determined by the C
the maximum on-period is corrected according
to the source current.
0.5 mA, C
0.5 mA, C
0.2 mA, C
0.2 mA, C
0.2 mA, C
Conditions
OUT
OUT
F
F
F
F
F
F
F
0 mA
0 mA
1 000 pF
1 000 pF
1 000 pF
1 000 pF
1 000 pF
1 000 pF
1 000 pF
Description
Min
100
F
pin. Also note that
AN8038, AN8038S
Typ
400
100
190
5.4
0.1
4.2
1.0
0.1
2.6
12
67
15
40
20
Max
300
Unit
kHz
I/O
ns
ns
ns
ns
V
V
V
V
V
I
A
s
s
s
5