Voltage Regulators
AN8026
Self-excited RCC pseudo-resonance type
AC-DC switching power supply control IC
s
Overview
The AN8026 is an IC developed for controlling the
self-excited switching power supply employing the RCC
pseudo-resonance type control method.
It is compact, equipped only with the necessary mini-
mum functions.
The maximum on-period and the minimum off-pe-
riod can be set separately by using the external capacitor
and resistor respectively.
It is suitable for the power supply of AV equipment.
2.4±0.25
6.0±0.3
3.3±0.25
Unit: mm
8
0.5±0.1
7
6
23.3±0.3
5
4
1.5±0.25
1.4±0.3
3
2
1
1.5±0.25
2.54
9
s
Features
0.3
+0.1
–0.05
•
Operating supply voltage range:
3.0±0.3
Stop voltage (8.6 V typical) to 34 V
SIP009-P-0000C
•
Output block employs the totem pole system.
•
Power MOSFET can be directly driven.
(output peak current:
±1
A maximum)
•
Small pre-start operating current (80
µA
typical) allows using a small size start resistor.
•
Built-in pulse-by-pulse overcurrent protection function
•
Incorporating protection circuit against malfunction at low voltage (start/stop: 14.9 V/8.6 V)
•
Built-in overvoltage protection function (externally resettable)
•
Equipped with frequency (VF) control function.
•
9-pin single inline package expands the freedom of board design.
s
Applications
•
Televisions, facsimiles, printers, scanners, video equipment
V
CC
s
Block Diagram
Signal
U.V.L.O.
8.6 1.5
V V
8
V
REF
(7.1 V)
7
Current source
Switch
diode
I
FB
Q Q
RS
latch
R
S
0.7 V
CLM
4
IN
IN
OVP
6
5
V
OUT
GND
FB
TDL
9
1
Low-side High-side
clamp
clamp
0V
2.8 V
0.1 V
0.7 V
CLM
2
TOFF
TON
3
30°
1
PANASONIC [ PANASONIC SEMICONDUCTOR ]
