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Data Sheet 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: 50A (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
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet 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.
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BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Functional Block Diagram
VCC
7
34V UVLO S/R 5V REF
AP384XG
8
GND
5
2.50V
REF
INTERNAL BIAS
RT/CT
4
VREF GOOD LOGIC OSC OVER TEMP PROTECT S ERROR AMP 2R R R 1V Q Q
6
OUTPUT
FB COMP CS
2 1 3
PWM CURRENT LATCH SENSE COMPARATOR
Figure 3. Functional Block Diagram of AP384XG
Ordering Information
AP384XG Circuit Type Package M: SOIC-8 P: DIP-8 E1: Lead Free Blank: Tin Lead TR: Tape and Reel Blank: Tube
Package
SOIC-8 DIP-8
Temperature Range
-40 to 85oC -40 to 85oC
Part Number Tin Lead
AP3842/3/4/5GM
Marking ID Tin Lead
3842/3/4/5GM 3842/3/4/5GM AP3842/3/4/5GP
Lead Free
AP3842/3/4/5GM-E1
Lead Free
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 AP3842/3/4/5GP AP3842/3/4/5GP-E1
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet 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 oC oC
AP384XG
1
-0.3 to 6.3 20 1000 460 -65 to 150 -40 to 85 +300 300
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 TA -40
Min
Max
500 85
Unit
KHz
oC
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet 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 AP3842G/AP3844G AP3843G/AP3845G Minimum Operating Voltage AP3842G/AP3844G AP3843G/AP3845G TOTAL STANDBY CURRENT SECTION Start-up Current Operating Current Standby Operating Current Zener Voltage PWM SECTION Maximum Duty Cycle AP3842G/AP3843G AP3844G/AP3845G 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 94 46 96 48 50 0 % % VCC=14V VFB=0, VCS=0, CL=1nF VFB=2.7V, VCS=0.5V ICC=25mA 30 50 8 6 34 80 A mA mA V 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.
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet 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 VOL VOH tR tF ISINK = 20mA ISINK = 200mA High Output Voltage ISOURCE = 20mA ISOURCE = 200mA Rise Time Fall Time SKIP CYCLE MODE SECTION Source Current (@ CS) VOUTPUT=Low, TJ=25oC TSHUT THYS 180 200 220 A TJ=25oC, TJ=25oC, CL=1nF CL=1nF 13 12 0.2 1.4 13.5 13 150 50 250 150 0.4 2.2 V V V V ns ns IBIAS TLEB VI(MAX) GV PSRR VCOMP=5V (Note 5) 0V VCS 4V (Note 5, 6) 12V VCC 25V (Note 5, 7) VCS= 0 to 2V (Note 7) VOUTPUT=High 0.9 2.85 1 3 70 150 -3 250 250 -10 1.1 3.15 V V/V dB ns A ns PSRR VI ISINK ISOURCE VOH VOL VCOMP=2.5V VCOMP=1.1V VCOMP=5V RL=15k to GND RL=15k to pin REF 2V VO 4V 12V VCC 25V 65 60 2.45 6 -0.5 5 2.50 10 -0.8 7 0.7 90 70 1.1 2.55 V mA mA V V dB dB Symbol Conditions Min Typ Max Unit
AP384XG
OVER-TEMPERATURE PROTECT SECTION Shutdown Temperature Temperature Hysteresis 155 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.
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Electrical Characteristics (Continued)
VREF 4.7k RT 2N2222
1
AP384XG
AP3842G COMP REF
8
A
VCC
1k ERROR AMP ADJUST 4.7k
100k
2
FB
VCC
7
0.1F 5k ISENSE ADJUST
3
CS RT/CT
OUTPUT GND
6
1K 1W OUTPUT 0.1F
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.
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Typical Performance Characteristics AP384XG
30
100k
50K
10
Dead Time (s)
CT
3
RT ()
nF =1
CT 0 =1
CT
nF
10k
0 =1 0n
1
5K
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
60
5.010
VCC=15V, IO=1mA
50
Reference Voltage (V)
5.005
Start-up Current (A)
40
5.000
AP3842G/44G
30
4.995
4.990
20
4.985
10
4.980 -40
-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
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Typical Performance Characteristics (Continued) AP384XG
90
4.0
80
3.5
o
Saturation Voltage (V)
3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 0 50 100 150 200
VCC=15V, TA=25 C
70
VCC=15V, TA=25 C
o
Voltage Gain (dB)
250 300 350 400 450 500 550 600
60 50 40 30 20 10 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
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Typical Application
NTC C14 100/400V + JP1 AC 90 to 264V C1 47 + D2 1N4001 7 R12 100 2 C5 220p 1 R14 130k 5 R2 1.2M R20 1M C2 0.01 600V D1 FR107 R4 4.7 R3 39k 2W C15 2.2n T
AP384XG
R19 10 D3 8TQ100 + C9 2200 JP2 12V/5A L3 10 C10 1000 + C11 1 R21 3k Z2 SA12A
Vcc VCC
C3 0.1
REF
8 R5 10k C4 3.3n C8 0.22 R6 10 Q1 IRF830 U3 AZ431 W1 1k R18 1k C6 220p/600V R15 100 R16 8.2k
FB
RT/CT OUTPUT
4
COMP
6
GND
U1 AP384XG
CS
3
R7 2k
R13 15k R11 820
C7 680p
Z1 1N5819
R9 10k
R10 0.51/1W R17 2k
U2 PC817
Figure 12. Typical Application of AP384XG in AC/DC Converter
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Mechanical Dimensions SOIC-8 Unit: mm(inch) AP384XG
4.800(0.189) 5.000(0.197) 7 1.350(0.053) 1.750(0.069)
0.320(0.013)
8
7
8
0.675(0.027) 0.725(0.029)
D
5.800(0.228) 6.200(0.244)
D 20:1
1.270(0.050) TYP
0.100(0.004) 0.300(0.012) R0.150(0.006)
0.800(0.031)
0.200(0.008)
1.000(0.039) 3.800(0.150) 4.000(0.157)
0 8
0.330(0.013) 0.510(0.020) 0.900(0.035)
1 5
R0.150(0.006)
0.190(0.007) 0.250(0.010)
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet GREEN MODE PWM CONTROLLER Mechanical Dimensions (Continued) DIP-8 Unit: mm(inch) AP384XG
0.700(0.028) 7.620(0.300)TYP 1.524(0.060) TYP
6
6
5
3.710(0.146) 4.310(0.170) 4
3.200(0.126) 3.600(0.142)
4
3.000(0.118) 3.600(0.142)
0.510(0.020)MIN
0.254(0.010)TYP 0.360(0.014) 0.560(0.022) 2.540(0.100) TYP 0.130(0.005)MIN
0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370)
R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370)
6.200(0.244) 6.600(0.260)
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.

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