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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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