Voltage Regulators
1
AN8022L, AN8022SB
AC-DC switching power supply control IC
n Overview
The AN8022L and AN8022SB are ICs which are
suitable for controlling a switching power supply using
primary side control method.
Those are most suited for a switching power supply
of relatively small capacity. Less frequently used func-
tions are removed, and only the necessary minimum func-
tions are incorporated, so that they are compact and very
easy to use.
Moreover, the internal settings are incorporated as
much as possible, thus cost down can be realized by de-
creasing the peripheral parts.
n Features
• It operates at a control frequency up to 700 kHz, realiz-
ing the output rise time of 35 ns and the output fall time
of 25 ns.
• Pre-start operating current is as small as 70 m A (typical)
so that it is possible to miniaturize the start resistor.
• Output block employs totem pole method.
The absolute maximum rating of – 1.0 A (peak) allows
the direct drive of power MOSFET.
• Built-in pulse-by-pulse overcurrent protection circuit
• Built-in protection circuit against malfunction at low
voltage (on/off: 14.2 V/9.2 V)
• Maximum Duty is 44% (typical)
• Equipped with timer latch function and overvoltage pro-
tection circuit.
• Two kinds of packages: 9-pin SIP, 16-pin SOP
n Applications
• Various power supply equipment
AN8022L Unit: mm
SIP009-P-0000D
SSOP016-P-0225B
AN8022SB Unit: mm
21.7±0.3
9
8
7
6
5
4
3
2
1
4.3±0.3
1.0±0.25
2.7±0.25
1.4±0.25
1.35±0.25
0.4±0.25
0.5±0.1
1.2±0.25
2.54
0.3
+0.1
–0.05
0.10
±0.10
1.50
±0.20
0.65(0.45)
0.80
6.30
±
0.30
4.30
±
0.30
0.35±0.10
6.50±0.30
-0
.0
5
+
0
.1
0
0.15
0.50±0.05
1.00±0.20
Seating plane
16 9
81
Seatng plane