PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
The AP3783 is a high performance AC/DC power supply controller for
battery charger and adapter applications. The controller regulates the
output voltage and current in the primary side by piece-wise Pulse
Frequency Modulation (p-PFM) in discontinuous conduction mode
Pin 1 Mark
The AP3783 provides accurate constant voltage (CV), constant
current (CC) and outstanding dynamic performance without requiring
an opto-coupler. It also eliminates the need of loop compensation
circuitry while maintaining stability.
The AP3783 provides valley turn-on function, operating frequency
Jitter function (about 5.5% frequency change every 256μs) from light
to full load range and 3-segment drive current to improve the power
supply EMI performance. The AP3783 also has built-in fixed cable
voltage drop compensation (10%, 7% and 4% of nominal system
output voltage to meet various cables with different length and gauge)
and adjustable line voltage compensation.
The AP3783 is packaged in SOT26.
Standby and Auxiliary Power Supplies
Less than 75mW Standby Power Consumption
Meet Efficiency Requirement of COC Trier2
Valley Turn-on to Reduce Switching Loss and Improve EMI
Piece-wise Frequency Reduction to Enhance Conversion
Efficiency and Suppress Audio Noise
Over Voltage Protection (OVP)
Over Temperature Protection (OTP)
Short Circuit Protection (SCP) with Hiccup
3-Segment Drive Current for Radiative EMI Suppression
Operating Frequency Jitter Function for Conductive EMI
Drive MOSFET for 5W to 30W Battery Charger/Adapter
SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD-
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Document number: DS37429 Rev. 6 - 2
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