AN8021NS Datasheet, PDF (1/4 Pages) Panasonic Semiconductor – External excitation flyback AC-DC switching power supply control IC

Voltage Regulators
AN8021NS
External excitation flyback AC-DC switching power supply control IC
s Overview
The AN8021S is a switching power supply control IC
that controls the power supply from the primary side. It is
optimal for relatively small switching power supplies. All
rarely used functions have been removed from the
AN8021S and as a result it is an extremely easy-to-use
compact device. Furthermore, internal settings are
implemented as many as we can, cost cut is possible with
reduced external parts.
s Features
• Supports operation at switching frequencies up to
700 kHz and achieves a 35 ns output rise time and a 25
ns output fall time.
• Extremely low pre-startup current consumption of 70
µA (typical) allows a significantly smaller startup resistor
to be used.
• Totem pole circuit structure adopted in the output block.
• Output current absolute maximum rating of ±1.0 A
(peak) for direct driving of power MOSFET.
• Pulse-by-pulse overcurrent protection circuit
• Low voltage malfunction prevention circuit
On/off: 14.2 V/9.2 V
• Timer latch and overvoltage protection functions
• Package: SONF-8D
s Applications
• Switching power supplies
5.01±0.20
8
5
Unit: mm
(1.05)
1
4
0° to 10°
0.50±0.20
(0.60)
1.27
0.10
+0.10
0.40 –0.05
Seating plane
SOP008-P-0225C
s Block Diagram
TIM/OVP ³
CT ⁶
RT ⁵
OVP
Start/Stop
V_REF
OSC OCL
4.2 V
FB
PWM
Drive
Reset
CLM
1 _VOUT
8 _GND
7 _CLM
1