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AP3845G Dataheets PDF



Part Number AP3845G
Manufacturers Shanghai SIM-BCD Semiconductor
Logo Shanghai SIM-BCD Semiconductor
Description Green Mode PWM Controller
Datasheet AP3845G DatasheetAP3845G Datasheet (PDF)

Data Sheet GREEN MODE PWM CONTROLLER General Description Features AP384XG The AP384XG is a Green Mode PWM controller. It is specially designed for off-line AC-DC adapter and battery charger applications where both needs for low standby power and high efficiency in normal operation are required. In a well designed product, the AP384XG is capable to allow the system consuming only 0.5W power in standby mode. In normal operation, the AP384XG features adjustable frequency by using an external re.

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Data Sheet GREEN MODE PWM CONTROLLER General Description Features AP384XG The AP384XG is a Green Mode PWM controller. It is specially designed for off-line AC-DC adapter and battery charger applications where both needs for low standby power and high efficiency in normal operation are required. In a well designed product, the AP384XG is capable to allow the system consuming only 0.5W power in standby mode. In normal operation, the AP384XG features adjustable frequency by using an external resistor and capacitor combination. When output power falls below a given level, the IC automatically switches to the skip mode, which works by skipping switching cycles. The AP384XG also features low start-up and low standby operating current for its special topology. · Green Mode PWM Controller to Support the "Blue Angel" Norm · Adjustable Skip Cycle Mode Operation · Low Start-up Current: 50μA (Typ.) · Low Standby Operating Current: 6mA · Internal Leading Edge Blanking · Adjustable Oscillator Frequency up to 500KHz · Totem Pole Output · Under Voltage Lock Out (UVLO) · Over-Temperature Protection · Pin to Pin Replacement for AZ384XA Applications The AP384XG provides accurate protection against over-temperature, over-current and maximal output · Off-line Converter power. · DC-DC Converter · DVD/STB Power Supply The AP384XG is available in SOIC-8 and DIP-8 · Power Adapter packages. · CRT Monitor Power Supply Option 1 SOIC-8 Option 2 DIP-8 Figure 1. Package Types of AP384XG Jul. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited 1 GREEN MODE PWM CONTROLLER Pin Configuration M Package (SOIC-8) COMP 1 FB 2 CS 3 RT/CT 4 8 REF 7 VCC 6 OUTPUT 5 GND Data Sheet AP384XG P Package (DIP-8) COMP 1 FB 2 CS 3 RT/CT 4 8 REF 7 VCC 6 OUTPUT 5 GND Figure 2. Pin Configuration of AP384XG (Top View) Pin Description Pin Number 1 2 3 4 5 6 7 8 Pin Name COMP FB CS RT/CT GND OUTPUT VCC REF Function This pin is the Error Amplifier output and is made available for loop compensation. The inverting input of the Error Amplifier. It is normally connected to the switching power supply output through an external resistor divider. It is used either for current sense (normal mode) or skip cycle level selection (standby mode). The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to REF and capacitor CT to ground. The ground pin. This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A are sourced and sunk by this pin. The power supply pin. This is the reference output. It provides charging current for capacitor CT through resistor RT. Jul. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited 2 GREEN MODE PWM CONTROLLER Functional Block Diagram VCC 7 GND 5 34V 2.50V UVLO S/R 5V REF RT/CT 4 FB 2 COMP 1 CS 3 ERROR AMP VREF GOOD LOGIC OSC OVER TEMP PROTECT SQ 2R RQ R 1V PWM CURRENT LATCH SENSE COMPARATOR INTERNAL BIAS Data Sheet AP384XG 8 REF 6 OUTPUT Figure 3. Functional Block Diagram of AP384XG Ordering Information AP384XG - Circuit Type Package M: SOIC-8 P: DIP-8 E1: Lead Free G1: Green TR: Tape and Reel Blank: Tube Package Temperature Range Part Number Lead Free Green Marking ID Lead Free Green Packing Type AP3842/3/4/5GM-E1 AP3842/3/4/5GM-G1 3842/3/4/5GM-E1 SOIC-8 -40 to 85oC AP3842/3/4/5GMTR-E1 AP3842/3/4/5GMTR-G1 3842/3/4/5GM-E1 3842/3/4/5GM-G1 3842/3/4/5GM-G1 Tube Tape & Reel DIP-8 -40 to 85oC AP3842/3/4/5GP-E1 AP3842/3/4/5GP-G1 AP3842/3/4/5GP-E1 AP3842/3/4/5GP-G1 Tube BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Jul. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited 3 GREEN MODE PWM CONTROLLER Absolute Maximum Ratings (Note 1, 2) Data Sheet AP384XG Parameter Symbol Value Unit Supply Voltage Gate Output Current Analog Inputs (pin2, 3) VCC IO V(ANA) 30 V ±1 A -0.3 to 6.3 V Error Amp Output Sink Current Power Dissipation at TA< 25 oC (DIP-8) Power Dissipation at TA<25 oC (SOIC-8) Storage Temperature Range ISINK(E.A) PD (Note 3) PD (Note 3) TSTG 20 mA 1000 mW 460 mW -65 to 150 oC Ambient Temperature TA -40 to 85 oC Lead Temperature (Soldering, 10sec) TLEAD +300 oC ESD (Machine Model) 300 V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: All voltages are with respect to pin GND and all currents are positive into specified terminal. Note 3: Board thickness 1.6mm, board dimension 90mm x 90mm. Recommended Operating Conditions Parameter Oscillation Frequency Ambient Temperature Symbol f.


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