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AN8026

Part Number	AN8026
Manufacturer	Panasonic Semiconductor
Description	Self-excited RCC pseudo-resonance type AC-DC switching power supply controller
Published	Mar 26, 2005
Detailed Description	Voltage Regulators AN8026 Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC s Overview The...
Datasheet	AN8026 PDF File

Overview

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 minimum functions.
The maximum on-period and the minimum off-period 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 VCC s Block Diagram Signal U.
V.
L.
O.
8.
6 1.
5 V V 8 VREF (7.
1 V) 7 Current source Switch diode IFB Q Q RS latch R S 0.
7 V CLM 4 IN IN OVP 6 5 VOUT 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 AN8026 s Pin Descriptions Pin No.
1 2 3 4 5 6 7 8 9 Symbol TDL TOFF TON CLM GND VOUT VCC OVP FB Description Transformer reset detection Pin for connecting C and R to set minimum off-period Pin for connecting C to set minimum on-period Input pin for overcurrent protection detection Grounding pin Output pin Power supply voltage pin Input pin for overvoltage protection circu...

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