an8038 Panasonic Corporation of North America, an8038 Datasheet - Page 3

• 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
Note) * 1: When mounted on a printed circuit board: 477 mW
Pin No. Symbol
Pin Descriptions
Absolute Maximum Ratings
Supply voltage
Peak output current
Power dissipation
(Independent IC
without a heat sink) AN8038S
Operating temperature
Storage temperature
Recommended Operating Range
Supply voltage
1
2
3
4
5
6
7
8
* 2: When mounted on a printed circuit board: 191 mW
Parameter
RSTB
Parameter
CLM
GND
V
V
IFB
TR
CF
OUT
CC
Transformer reset. 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 during the minimum off-period determined by
the CF pin. The maximum on-period is also corrected according to the current flowing out of this
pin.
Adjusts the light-load detection level that determines the when the IC switches from RCC to
discontinuous operation. When the voltage (V
signal from IFB pin goes up higher than this pin, minimum off-period current at CF pin decreases,
and operating frequency decreases.
The detection level can be adjusted arbitrarily using an external pull-down resistor.
Connection for the capacitor that determines the on and off periods for the IC output (Out).
Input for the current feedback signal from the power supply output photocoupler
Input of the pulse-by-pulse overcurrent protection circuit. Normally, it will be necessary to add
an external filter for this input.
Ground
Output to drive a power MOSFET directly
Power supply. This pin watches V
OVP, and OVP reset levels.
AN8038
Symbol
V
CC
P
P
P
P
D
D
D
D
(T
(T
(T
(T
Symbol
From the stop voltage to the OVP operating voltage
V
T
a
a
a
a
T
I
OP
opr
CC
stg
25 C)
85 C)
25 C)
85 C)
CC
, and has operating threshold voltages for the start, stop,
Description
Range
FB
) which is I-V conversion of current feedback
55 to 150
30 to 85
Rating
306
122
1, 2
500
260
28
* 1
* 2
AN8038, AN8038S
Unit
Unit
mW
V
A
V
C
C
3