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Preliminary Datasheet GREEN MODE PWM CONTROLLER General Description 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. The AP384XG provides accurate protection against over-temperature, over-current and maximal output power. The AP384XG is available in SOIC-8 and DIP-8 packages. AP384XG Features * * * * * * * * * * Green Mode PWM Controller to Support the "Blue Angel" Norm Adjustable Skip Cycle Mode Operation Low Start-up Current: 40A (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 * * * * * Off-line Converter DC-DC Converter DVD/STB Power Supply Power Adapter CRT Monitor Power Supply SOIC-8 DIP-8 Figure 1. Package Types of AP384XG BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Pin Configuration P/M Package (DIP-8/SOIC-8) COMP FB CS RT/CT 1 2 3 4 8 7 6 5 REF VCC OUTPUT GND AP384XG Figure 2. Pin Configuration of AP384XG 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. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Functional Block Diagram VCC 34V UVLO S/R 5V REF AP384XG GND 2.50V REF INTERNAL BIAS VREF GOOD LOGIC OUTPUT OVER TEMP PROTECT S RT/CT OSC ERROR AMP Q Q PWM 2R 1V FB COMP CS R R CURRENT LATCH SENSE COMPARATOR Figure 3. Functional Block Diagram of AP384XG Ordering Information A Z 384XG Circuit Type Package M: SOIC-8 P: DIP-8 E1: Lead-free Blank: Tin Lead TR: Tape/Reel Blank: Tube Package SOIC-8 DIP-8 Temperature Range -40 to 85oC -40 to 85oC Part Number Tin Lead AP3842/3/4/5GM AP3842/3/4/5GP Marking ID Tin Lead 3842/3/4/5GM 3842/3/4/5GM AP3842/3/4/5GP LeadFree AP3842/3/4/5GM-E1 AP3842/3/4/5GP-E1 LeadFree 3842/3/4/5GM-E1 3842/3/4/5GM-E1 AP3842/3/4/5GP-E1 Packing Type Tube Tape/Reel Tube AP3842/3/4/5GMTR AP3842/3/4/5GMTR-E1 The listed part numbers are used during the transition to lead-free products. After the transition completed, lead-free products will be considered as the"standard" and we will resume the original part numbers. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Absolute Maximum Ratings (Note 1, 2) Parameter Supply Voltage Gate Output Current Analog Inputs (pin2, 3) Error Amp Output Sink Current Power Dissipation at TA< 25 oC (DIP-8) Power Dissipation at TA<25 oC (SOIC-8) Storage Temperature Range Ambient Temperature Lead Temperature (Soldering, 10sec) ESD (Machine Model) Symbol Vcc Io V(ANA) ISINK(E.A) PD (Note 3) PD (Note 3) TSTG TA TLEAD Value 30 Unit V A V mA mW mW oC o AP384XG 1 -0.3 to 6.3 20 1000 460 -65 to 150 -40 to 85 +300 300 C oC 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 Symbol f TA Min -40 Max 500 85 Unit KHz o Ambient Temperature C BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Electrical Characteristics (VCC=15V, RT=10k CT=3.3nF, TA= -40 to 85oC, unless otherwise specified.) Parameter REFERENCE SECTION Reference Output Voltage Total Output Variation Line Regulation Load Regulation Short Circuit Output Current Temperature Stability UNDER VOLTAGE LOCK OUT SECTION Start-up Threshold Minimum Operating Voltage TOTAL STANDBY CURRENT SECTION Start-up Current Operating Current Standby Operating Current Zener Voltage PWM SECTION Maximum Duty Cycle Minimum Duty Cycle OSCILLATOR SECTION Oscillation Frequency Oscillator Amplitude Temperature Stability Voltage Stability Discharge Current 12V VCC 25V VRT/CT = 2V (Note 4) 8.5 f VOSC TJ=25oC Pin RT/CT, peak to peak 47 52 1.7 2 0.2 9.5 1 10.5 57 KHz V % % mA AP3842G/AP3843G AP3844G/AP3845G 94 46 96 48 50 0 % % VCC=14V VFB=0, VCS=0, CL=1nF VFB=2.7V, VCS=0.5V ICC=25mA 30 40 8 6 34 80 A mA mA V AP3842G/AP3844G AP3843G/AP3845G AP3842G/AP3844G AP3843G/AP3845G 15 7.8 8.5 7.0 16 8.4 10 7.6 17 9.0 11.5 8.2 V V VREF VREF ISC VREF TJ=25oC, IREF=1mA Line, Load, Temp. 12V VCC 25V 1mA IREF 20mA TA=25oC 4.95 4.9 4 4 -100 0.2 5.00 5.05 5.10 15 15 -180 0.4 V V mV mV mA mV/oC Symbol Conditions Min Typ Max Unit AP384XG Note 4: This parameter is measured with RT=10k to VREF, it contributes 0.3mA of current to the measured value. So the total current flowing into the CT pin will be 0.3mA higher than the measured value approximately. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Electrical Characteristics (Continued) Parameter ERROR AMPLIFIER SECTION Input Voltage Output Sink Current Output Source Current High Output Voltage Low Output Voltage Voltage Gain Power Supply Rejection Ratio CURRENT SENSE SECTION Maximum Input Signal Gain Power Supply Rejection Ratio Delay to Output Input Bias Current Leading Edge Blanking Duration OUTPUT SECTION Low Output Voltage High Output Voltage Rise Time Fall Time SKIP CYCLE MODE SECTION Source Current (@ CS) VOUTPUT=Low, TJ=25oC TSHUT THYS 180 200 220 A OVER-TEMPERATURE PROTECT SECTION Shutdown Temperature Temperature Hysteresis 155 25 oC o AP384XG Symbol VI ISINK ISOURCE VOH VOL PSRR VI(MAX) GV PSRR IBIAS TLEB Conditions VCOMP=2.5V VCOMP=1.1V VCOMP=5V RL=15k to GND RL=15k to pin REF 2V VO 4V 12V VCC 25V VCOMP=5V (Note 5) 0V VCS 4V (Note 5, 6) 12V VCC 25V (Note 5, 7) VCS= 0 to 2V (Note 7) VOUTPUT=High Min 2.45 6 -0.5 5 65 60 0.9 2.85 Typ 2.50 10 -0.8 7 0.7 90 70 1 3 70 150 -3 250 Max 2.55 Unit V mA mA V 1.1 V dB dB 1.1 3.15 250 -10 V V/V dB ns A ns VOL VOH tR tF ISINK = 20mA ISINK = 200mA ISOURCE = 20mA ISOURCE = 200mA TJ=25oC, TJ=25oC, CL=1nF CL=1nF 13 12 0.2 1.4 13.5 13 150 50 0.4 2.2 V V V V 250 150 ns ns C Note 5: Parameters are tested at trip point of latch with Vpin2 = 0. Note 6: Here gain is defined as: VPin 1 A= , 0 Vpin3 0.8V VPin 3 Note 7: These parameters, although guaranteed, are not 100% tested in production. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Electrical Characteristics (Continued) VREF 4.7k RT 2N2222 COMP 1k ERROR AMP ADJUST 4.7k 100k VFB 5k ISENSE ADJUST ISENSE RT/CT 2 7 1 AP384XG A AP3842G 8 VCC VREF VCC 0.1f OUTPUT GND 1K 1W OUTPUT 0.1f 3 6 4 5 CT GND Figure 4. Basic Test Circuit Figure 4 is the basic test circuit for AP384XG. In testing, the high peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be connected close to pin 5 in a single point ground. The transistor and 5k potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to pin 3. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Typical Performance Characteristics AP384XG 30 100k 10 50K Dead Time (s) CT 3 RT () nF =1 CT 0 =1 CT nF 10k 0 =1 1 5K 0n F 0.3 1 2.2 4.7 10 22 47 100 100 1k 10k 100k 1M Timing Capacitor (nF) Frequency (Hz) Figure 5. Oscillator Dead Time vs. Timing Capacitor Figure 6. Timing Resistor vs. Frequency 5.015 5.010 5.005 5.000 4.995 4.990 4.985 4.980 -40 60 VCC=15V, IO=1mA 50 Reference Voltage (V) Start-up Current (A) 40 AP3842G/44G 30 20 10 -20 0 20 40 60 80 o 100 120 0 0 2 4 6 8 10 12 14 16 18 Ambient Temperature ( C) Supply Voltage (V) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Start-up Current vs. Supply Voltage BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Typical Performance Characteristics (Continued) AP384XG 90 4.0 3.5 80 o Saturation Voltage (V) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 VCC=15V, TA=25 C Voltage Gain (dB) 70 60 50 40 30 20 10 VCC=15V, TA=25 C o 0 50 100 150 200 250 300 350 400 450 500 550 600 0 10 100 1k 10k 100k 1M Output Sink Current (mA) Frequency (Hz) Figure 9. Output Saturation Characteristics Figure 10. Error Amplifier Open-Loop Frequency Response 60 50 Start-up Current (A) AP3842G 40 30 20 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Figure 11. Start-up Current vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER Typical Application NTC R19 10 C15 2.2n T D1 Byv26e D3 8TQ100 + C9 2200 D2 1N4148 J2 12V/5A L3 10 C10 1000 + C11 1 C12 10 Z2 SA12A AP384XG + J1 AC 220V C1 100 + 7 R12 100 2 C5 220p 1 R14 130k 5 R2 1.2M C14 100/400V C2 0.01 600V R3 39k 2W R4 4.7 Vcc VCC VFB COMP GND VREF 8 R5 10k C3 0.1 C4 3.3n C8 0.22 R6 1 R7 2k Q1 IRF830 U3 AZ431 W1 1k R18 1k C6 220p/600V R15 100 R16 8.2k RT/CT OUTPUT ISENSE U1 AP384XG 4 6 3 R13 15k R11 820 Z1 1N5819 C7 680p R9 10k R10 0.51/1W R17 2k U2 PC817 Figure 12. Typical Application of AP384XG in AC/DC Converter BCD Semiconductor Manufacturing Limited |
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