AP1601 Datasheet, PDF (1/22 Pages) Anachip Corp – Step-Up DC/DC Converter

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AP1601
LED light control IC, dimmer compatible
DESCRIPTION
The AP1601 is a control IC which is suitable for LED lighting applications to supply a current to LEDs from an AC
power source. The AP1601 can be configured as a DCM isolated flyback circuit or as a CCM non-isolated step
down chopper circuit (Buck converter). Also, LED lighting applications for a phase control dimmer (hereinafter
called TRIAC dimmer) can be constructed with fewer external components on the application board.
Many functions for LED lighting applications are integrated into the AP1610 such as: 30V pre-driver, TRIAC
dimmer control circuit, constant current circuit using the auxiliary winding of the transformer, noise reduction
circuit during DCM operation and various protection functions.
The AP1601A also has an independent analog dimming pin and a PWM dimming pin for non-TRIAC dimming
systems, providing a low cost LED application with a wide range of dimming configurations.
FEATURES
 LED driver with reduced external component count.
 Constant current control using auxiliary winding of transformer. (no photo-coupler is
required)
 Rectified AC voltage up to 275V can be applied for start-up / Start up by rectified AC voltage up
to 275V.
 Current control functions
 DCM flyback: Control with switching frequency changed by peak current on primary side and
forward voltage of LEDs.
 CCM chopper (Buck): Control with off-time changed by peak current on primary side and
forward voltage of LEDs.
 Analog dimming by external DC input. (Current peak control)
 PWM dimming by external pulse input.
 TRIAC dimmer compatible, Built in current supply circuit
 Protection circuits
 LED open protection.
 Over current protection when transformer is shorted.
 Under voltage lockout. (UVLO)
 Thermal protection.
 Package
 14pin SOP.
APPLICATION
 Indoor LED lights up to 40W maximum
 LED down light.
 LED bracket.
 LED ceiling light.
MS 1454-E-01
1
2012/08