AN8029 Datasheet, PDF (1/13 Pages) Panasonic Semiconductor – Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC

Voltage Regulators
AN8029
Self-excited RCC pseudo-resonance type
AC-DC switching power supply control IC
s Overview
The AN8029 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
9
8
7
6
5
4
3
2
1
s Features
0.3
+0.1
–0.05
• Operating supply voltage range:
Stop voltage (8.6 V typical) to 34 V
• Output block employs the totem pole system.
3.0±0.3
SIP009-P-0000C
• Power MOSFET can be directly driven.
(output peak current: ±1 A maximum)
• Small pre-start operating current (95 µA typical) allows using a small size start resistor.
• Built-in pulse-by-pulse overcurrent protection function
• Incorporating the protection circuit against malfunction at low voltage (start/stop: 14.9 V/8.6 V)
• Built-in overvoltage protection function (externally resettable)
• Built-in timer latch function
• 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
s Block Diagram
Signal
U.V.L.O.
8.6 1.5
VV
8
TIM/OVP
V_REF
(7.1 V)
TIM
FB ⁹
1
TDL
Low-side High-side
clamp clamp
0V
2.8 V
Current source
Switch
diode
I_FB
0.1 V
QQ
RS
latch
R
0.32 V
S
0.7 V
IN
IN
6
V_OUT
5 _GND
4
CLM
CLM
1