Preliminary Datasheet
HIGH PERFORMANCE POWER FACTOR CORRECTOR
General Description
The AP1661A is an active power factor control IC
which is designed mainly for use as pre-converter in
electronic ballast, AC-DC adapters and off-line SMPS
applications.
The AP1661A includes an internal start-up timer for
stand-alone applications, a one-quadrant multiplier to
realize near unity power factor and a zero current
detector to ensure DCM boundary conduction opera-
tion. The totem pole output stage is capable of driving
power MOSFET with 600mA source current and
800mA sink current.
Designed with advanced BiCMOS process, the
AP1661A features low start-up current, low operation
current and low power dissipation. The AP1661A also
has rich protection features including over-voltage pro-
tection, input under-voltage lockout with hysteresis
and multiplier output clamp to limit maximum peak
current.
The AP1661A meets IEC61000-3-2 standard even at
one-quadrant load and its THD is lower than 10% at
high-end line voltage and full load.
This IC is available in SOIC-8 and DIP-8 packages.
AP1661A
Features
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Comply with IEC61000-3-2 Standard
Proprietary Design for Minimum THD
Zero Current Detection Control for DCM Bound-
ary Conduction Mode
Adjustable Output Voltage with Precise Over-
Voltage Protection
Ultra-low Startup Current: 30
µ
A Typical
Low Quiescent Current: 2.5mA Typical
Precision Internal Reference Voltage: 1%
Internal Startup Timer
Disable Function for Reduced Current
Consumption
Totem Pole Output with 600mA Source Current
and 800mA Sink Current Capability
Under-voltage Lockout with 2.5V of Hysteresis
Applications
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AC-DC Adapter
Off-line SMPS
Electronic Ballast
SOIC-8
DIP-8
Figure 1. Package Types of AP1661A
Jul. 2009 Rev. 1. 0
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
