Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG General Description Features 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. SOIC-8 · · · · · · · · · Green Mode PWM Controller to Support the "Blue Angel" Norm Adjustable Skip Cycle Mode Operation Low Start-up Current: 40µA (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 DIP-8 Figure 1. Package Types of AP384XG BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG Pin Configuration P/M Package (DIP-8/SOIC-8) COMP 1 8 REF FB 2 7 VCC CS 3 6 OUTPUT RT/CT 4 5 GND Figure 2. Pin Configuration of AP384XG Pin Description Pin Number Pin Name Function 1 COMP 2 FB The inverting input of the Error Amplifier. It is normally connected to the switching power supply output through an external resistor divider. This pin is the Error Amplifier output and is made available for loop compensation. 3 CS It is used either for current sense (normal mode) or skip cycle level selection (standby mode). 4 RT/CT The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to REF and capacitor CT to ground. 5 GND The ground pin. 6 OUTPUT 7 VCC The power supply pin. 8 REF This is the reference output. It provides charging current for capacitor CT through resistor RT. This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A are sourced and sunk by this pin. BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG Functional Block Diagram VCC 34V UVLO S/R GND 5V REF REF INTERNAL BIAS 2.50V VREF GOOD LOGIC RT/CT OUTPUT OSC OVER TEMP PROTECT S ERROR AMP 2R R FB R COMP 1V CS Q Q PWM CURRENT LATCH SENSE COMPARATOR Figure 3. Functional Block Diagram of AP384XG Ordering Information A Z 384XG E1: Lead-free Circuit Type Blank: Tin Lead TR: Tape/Reel Package M: SOIC-8 P: DIP-8 Package Temperature Range SOIC-8 -40 to 85oC DIP-8 -40 to 85oC Blank: Tube Part Number Tin Lead LeadFree AP3842/3/4/5GM AP3842/3/4/5GM-E1 AP3842/3/4/5GMTR AP3842/3/4/5GMTR-E1 AP3842/3/4/5GP AP3842/3/4/5GP-E1 Marking ID Tin Lead LeadFree Packing Type 3842/3/4/5GM 3842/3/4/5GM-E1 Tube 3842/3/4/5GM 3842/3/4/5GM-E1 Tape/Reel AP3842/3/4/5GP AP3842/3/4/5GP-E1 Tube 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 AP384XG Absolute Maximum Ratings (Note 1, 2) Parameter Symbol Value Unit Vcc 30 V Io ±1 A V(ANA) -0.3 to 6.3 V Error Amp Output Sink Current ISINK(E.A) 20 mA Power Dissipation at TA< 25 oC (DIP-8) PD (Note 3) 1000 mW Power Dissipation at TA<25 oC (SOIC-8) PD (Note 3) 460 mW TSTG -65 to 150 oC TA -40 to 85 TLEAD +300 oC 300 V Supply Voltage Gate Output Current Analog Inputs (pin2, 3) Storage Temperature Range Ambient Temperature Lead Temperature (Soldering, 10sec) ESD (Machine Model) o C 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 Min f TA -40 Max Unit 500 KHz 85 o C BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG Electrical Characteristics (VCC=15V, RT=10kΩ CT=3.3nF, TA= -40 to 85oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit 4.95 5.00 5.05 V REFERENCE SECTION Reference Output Voltage VREF Total Output Variation TJ=25oC, IREF=1mA Line, Load, Temp. 5.10 V Line Regulation ∆VREF 12V ≤ VCC ≤25V 4 15 mV Load Regulation ∆VREF 1mA ≤ IREF ≤20mA 4 15 mV -100 -180 mA 0.2 0.4 mV/oC V Short Circuit Output Current ISC 4.9 TA=25oC Temperature Stability UNDER VOLTAGE LOCK OUT SECTION Start-up Threshold Minimum Operating Voltage AP3842G/AP3844G 15 16 17 AP3843G/AP3845G 7.8 8.4 9.0 AP3842G/AP3844G 8.5 10 11.5 AP3843G/AP3845G 7.0 7.6 8.2 80 V TOTAL STANDBY CURRENT SECTION µA Start-up Current VCC=14V 40 Operating Current VFB=0, VCS=0, CL=1nF 8 mA Standby Operating Current VFB=2.7V, VCS=0.5V 6 mA Zener Voltage ICC=25mA 30 34 V AP3842G/AP3843G 94 96 % AP3844G/AP3845G 46 48 PWM SECTION Maximum Duty Cycle Minimum Duty Cycle 50 0 % 57 KHz OSCILLATOR SECTION Oscillation Frequency f Oscillator Amplitude VOSC TJ=25oC Pin RT/CT, peak to peak 47 Temperature Stability Voltage Stability 12V ≤ VCC ≤ 25V Discharge Current VRT/CT = 2V (Note 4) 8.5 52 1.7 V 2 % 0.2 1 % 9.5 10.5 mA Note 4: This parameter is measured with RT=10kΩ 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 AP384XG Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Unit 2.55 V ERROR AMPLIFIER SECTION Input Voltage Output Sink Current Output Source Current VI VCOMP=2.5V 2.45 2.50 ISINK VCOMP=1.1V 6 10 mA -0.5 -0.8 mA ISOURCE VCOMP=5V High Output Voltage VOH RL=15kΩ to GND Low Output Voltage VOL RL=15kΩ to pin REF Voltage Gain Power Supply Rejection Ratio PSRR 5 7 0.7 V 1.1 V 2V ≤ VO ≤ 4V 65 90 dB 12V ≤ VCC ≤ 25V 60 70 dB VCOMP=5V (Note 5) 0.9 1 1.1 V 0V ≤ VCS ≤ 4V (Note 5, 6) 2.85 3 3.15 V/V CURRENT SENSE SECTION Maximum Input Signal Gain VI(MAX) GV Power Supply Rejection Ratio PSRR Delay to Output Input Bias Current IBIAS Leading Edge Blanking Duration TLEB 12V ≤ VCC ≤ 25V (Note 5, 7) 70 VCS= 0 to 2V (Note 7) 150 250 ns -3 -10 µA VOUTPUT=High dB 250 ns OUTPUT SECTION Low Output Voltage High Output Voltage VOL VOH Rise Time tR Fall Time tF ISINK = 20mA 0.2 0.4 V ISINK = 200mA 1.4 2.2 V ISOURCE = 20mA 13 ISOURCE = 200mA 12 TJ=25oC, TJ=25oC, 13.5 V 13 V CL=1nF 150 250 ns CL=1nF 50 150 ns 200 220 µA SKIP CYCLE MODE SECTION Source Current (@ CS) VOUTPUT=Low, TJ=25oC 180 OVER-TEMPERATURE PROTECT SECTION Shutdown Temperature TSHUT 155 Temperature Hysteresis THYS 25 oC o 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 AP384XG Electrical Characteristics (Continued) VREF 4.7k RT 2N2222 A COMP 1k ERROR AMP ADJUST AP3842G 8 VREF 7 VCC VCC 100k VFB 2 0.1µf 5k 4.7k 1 ISENSE ADJUST ISENSE RT/CT 3 6 OUTPUT 4 5 GND CT 1K 1W OUTPUT 0.1µf 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 AP384XG Typical Performance Characteristics 100k 30 50K nF =1 RT (Ω) CT CT 3 0 =1 0 =1 10k nF CT Dead Time (µs) 10 0n 1 F 5K 0.3 1 2.2 4.7 10 22 100 100 47 1k 10k 60 5.015 50 Start-up Current (µA) Reference Voltage (V) VCC=15V, IO=1mA 5.005 5.000 4.995 4.990 40 AP3842G/44G 30 20 10 4.985 4.980 -40 1M Figure 6. Timing Resistor vs. Frequency Figure 5. Oscillator Dead Time vs. Timing Capacitor 5.010 100k Frequency (Hz) Timing Capacitor (nF) -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature 0 0 2 4 6 8 10 12 14 16 18 Supply Voltage (V) Figure 8. Start-up Current vs. Supply Voltage BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG Typical Performance Characteristics (Continued) 90 4.0 80 3.5 Voltage Gain (dB) Saturation Voltage (V) 2.5 2.0 1.5 1.0 50 40 30 20 0.0 10 0 50 100 150 200 250 300 350 400 450 500 550 600 Output Sink Current (mA) VCC=15V, TA=25 C 60 0.5 -0.5 o 70 o VCC=15V, TA=25 C 3.0 0 10 100 1k 10k 100k 1M Frequency (Hz) Figure 9. Output Saturation Characteristics Figure 10. Error Amplifier Open-Loop Frequency Response 60 AP3842G Start-up Current (µA) 50 40 30 20 -40 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Figure 11. Start-up Current vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Preliminary Datasheet GREEN MODE PWM CONTROLLER AP384XG Typical Application NTC C2 0.01µ 600V + R2 1.2M J1 AC 220V C14 100µ/400V C1 100µ R3 39k 2W R19 10 C15 2.2n D3 8TQ100 T D1 Byv26e R4 4.7 L3 10µ C10 1000µ C11 1µ C12 10µ + + + C9 2200µ D2 1N4148 7 cc VVCC 2 VFB 1 COMP 5 GND R12 100 J2 12V/5A C3 0.1µ VREF 8 R5 10k C5 220p RT/CT 4 OUTPUT 6 ISENSE 3 R14 130k U1 AP384XG R13 15k R11 820 Z2 SA12A Z1 1N5819 C4 3.3n C8 0.22µ C6 220p/600V R6 1 R7 2k C7 680p R15 100 R16 8.2k Q1 IRF830 R9 10k R10 0.51/1W U3 AZ431 W1 1k R18 1k R17 2k U2 PC817 Figure 12. Typical Application of AP384XG in AC/DC Converter BCD Semiconductor Manufacturing Limited