AP384XG [ANALOGICTECH]
GREEN MODE PWM CONTROLLER; 绿色模式PWM控制器
| 型号： | AP384XG |
| 厂家： | 
ADVANCED ANALOGIC TECHNOLOGIES |
| 描述： | GREEN MODE PWM CONTROLLER |
| 文件： | 总10页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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 bat-
tery 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.
·
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
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.
Applications
The AP384XG provides accurate protection against
over-temperature, over-current and maximal output
power.
·
·
·
·
·
Off-line Converter
DC-DC Converter
DVD/STB Power Supply
Power Adapter
CRT Monitor Power Supply
The AP384XG is available in SOIC-8 and DIP-8
packages.
SOIC-8
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
CS
2
3
4
7
6
5
VCC
OUTPUT
GND
RT/CT
Figure 2. Pin Configuration of AP384XG
Pin Description
Pin Number Pin Name
Function
1
2
COMP
FB
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.
3
4
CS
RT/CT
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.
5
6
GND
The ground pin.
OUTPUT This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A are
sourced and sunk by this pin.
7
8
VCC
REF
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
AP384XG
Functional Block Diagram
VCC
34V
UVLO
5V
REF
S/R
REF
GND
INTERNAL
BIAS
2.50V
VREF
GOOD
LOGIC
OUTPUT
OSC
2R
R /C
T
T
OVER TEMP
PROTECT
S
R
Q
Q
ERROR
AMP
FB
COMP
CS
PWM
1V
R
LATCH
CURRENT
SENSE
COMPARATOR
Figure 3. Functional Block Diagram of AP384XG
Ordering Information
A Z 384XG
-
E1: Lead-free
Blank: Tin Lead
Circuit Type
TR: Tape/Reel
Blank: Tube
Package
M: SOIC-8
P: DIP-8
Part Number
Marking ID
Tempera-
ture Range
Packing
Type
Package
Tin Lead
LeadFree
Tin Lead
LeadFree
AP3842/3/4/5GM
AP3842/3/4/5GM-E1
3842/3/4/5GM
3842/3/4/5GM
AP3842/3/4/5GP
3842/3/4/5GM-E1
3842/3/4/5GM-E1
AP3842/3/4/5GP-E1
Tube
Tape/Reel
Tube
-40 to 85oC
-40 to 85oC
SOIC-8
DIP-8
AP3842/3/4/5GMTR AP3842/3/4/5GMTR-E1
AP3842/3/4/5GP AP3842/3/4/5GP-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
AP384XG
Absolute Maximum Ratings (Note 1, 2)
Parameter
Symbol
Vcc
Value
30
Unit
V
Supply Voltage
Gate Output Current
Analog Inputs (pin2, 3)
Error Amp Output Sink Current
Io
A
± 1
V(ANA)
ISINK(E.A)
-0.3 to 6.3
20
V
mA
Power Dissipation at TA< 25 oC (DIP-8)
P
D (Note 3)
1000
460
mW
mW
Power Dissipation at TA<25 oC (SOIC-8)
Storage Temperature Range
Ambient Temperature
PD (Note 3)
oC
oC
TSTG
TA
-65 to 150
-40 to 85
+300
oC
V
Lead Temperature (Soldering, 10sec)
ESD (Machine Model)
TLEAD
300
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 indi-
cated 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
Symbol
Parameter
Oscillation Frequency
Ambient Temperature
Min
Max
500
85
Unit
KHz
f
o
TA
-40
C
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP384XG
Electrical Characteristics
o
(V =15V, R =10kΩ C =3.3nF, T = -40 to 85 C, unless otherwise specified.)
CC
T
T
A
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Output Voltage
Total Output Variation
Line Regulation
TJ=25oC, IREF=1mA
Line, Load, Temp.
VREF
4.95
4.9
5.00
5.05
5.10
15
V
V
∆VREF
∆VREF
ISC
12V ≤ VCC ≤25V
4
4
mV
mV
mA
Load Regulation
1mA ≤ IREF ≤20mA
TA=25oC
15
Short Circuit Output Current
Temperature Stability
-100
0.2
-180
0.4
mV/oC
UNDER VOLTAGE LOCK OUT SECTION
Start-up Threshold
AP3842G/AP3844G
AP3843G/AP3845G
AP3842G/AP3844G
AP3843G/AP3845G
15
7.8
8.5
7.0
16
8.4
10
17
9.0
V
V
Minimum Operating Voltage
11.5
8.2
7.6
TOTAL STANDBY CURRENT SECTION
Start-up Current
VCC=14V
40
8
80
µA
mA
mA
V
Operating Current
VFB=0, VCS=0, CL=1nF
Standby Operating Current
Zener Voltage
VFB=2.7V, VCS=0.5V
6
ICC=25mA
30
34
PWM SECTION
Maximum Duty Cycle
AP3842G/AP3843G
AP3844G/AP3845G
94
46
96
48
%
%
50
0
Minimum Duty Cycle
OSCILLATOR SECTION
TJ=25oC
Pin RT/CT, peak to peak
Oscillation Frequency
Oscillator Amplitude
Temperature Stability
Voltage Stability
f
47
52
1.7
2
57
KHz
V
VOSC
%
0.2
9.5
1
%
12V ≤ VCC ≤ 25V
VRT/CT = 2V (Note 4)
Discharge Current
8.5
10.5
mA
Note 4: This parameter is measured with RT=10kΩ to V
it contributes 0.3mA of current to the measured value.
REF,
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
ERROR AMPLIFIER SECTION
Input Voltage
VI
ISINK
ISOURCE
VOH
VCOMP=2.5V
2.45
6
2.50
10
2.55
V
mA
mA
V
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Voltage Gain
VCOMP=1.1V
VCOMP=5V
-0.5
5
-0.8
7
RL=15kΩ to GND
RL=15kΩ to pin REF
2V ≤ VO ≤ 4V
VOL
0.7
90
1.1
V
65
60
dB
dB
Power Supply Rejection Ratio
CURRENT SENSE SECTION
PSRR
12V ≤ VCC ≤ 25V
70
Maximum Input Signal
Gain
VI(MAX)
GV
VCOMP=5V (Note 5)
0.9
1
3
1.1
V
V/V
dB
ns
0V ≤ VCS ≤ 4V (Note 5, 6)
12V ≤ VCC ≤ 25V (Note 5, 7)
VCS= 0 to 2V (Note 7)
VOUTPUT=High
2.85
3.15
Power Supply Rejection Ratio
Delay to Output
PSRR
70
150
-3
250
-10
Input Bias Current
IBIAS
TLEB
µA
ns
Leading Edge Blanking Duration
OUTPUT SECTION
250
Low Output Voltage
ISINK = 20mA
0.2
1.4
13.5
13
0.4
2.2
V
V
V
V
ns
ns
VOL
VOH
ISINK = 200mA
ISOURCE = 20mA
ISOURCE = 200mA
TJ=25oC, CL=1nF
TJ=25oC, CL=1nF
High Output Voltage
13
12
Rise Time
tR
tF
150
50
250
150
Fall Time
SKIP CYCLE MODE SECTION
Source Current (@ CS)
OUTPUT=Low, TJ=25oC
180
200
220
µA
V
OVER-TEMPERATURE PROTECT SECTION
oC
oC
Shutdown Temperature
Temperature Hysteresis
TSHUT
THYS
155
25
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
VCC
RT
4.7k
2N2222
100k
A
COMP
VFB
AP3842G
VREF
VCC
1
2
3
4
8
7
6
5
1k
ERROR AMP
ADJUST
0.1µf
1K
1W
5k
ISENSE
RT/CT
OUTPUT
OUTPUT
GND
ISENSE
ADJUST
4.7k
GND
0.1µf
CT
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
50K
30
10
3
1
10k
5K
0.3
100
1k
10k
100k
1M
1
10
22
100
47
2.2
4.7
Frequency (Hz)
Timing Capacitor (nF)
Figure 6. Timing Resistor vs. Frequency
Figure 5. Oscillator Dead Time vs. Timing Capacitor
60
5.015
VCC=15V, IO=1mA
5.010
50
40
30
20
10
0
5.005
5.000
4.995
4.990
4.985
4.980
AP3842G/44G
-40
-20
0
20
40
60
80
100
120
0
2
4
6
8
10
12
14
16
18
Ambient Temperature (oC)
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
AP384XG
Typical Performance Characteristics (Continued)
90
4.0
3.5
80
70
VCC=15V, TA=25oC
VCC=15V, TA=25oC
3.0
60
2.5
50
2.0
40
1.5
30
1.0
20
10
0
0.5
0.0
-0.5
0
50 100 150 200 250 300 350 400 450 500 550 600
Output Sink Current (mA)
10
100
1k
10k
100k
1M
Frequency (Hz)
Figure 9. Output Saturation Characteristics
Figure 10. Error Amplifier Open-Loop Frequency Response
60
50
40
30
20
AP3842G
-40
-20
0
20
40
60
80
100
120
Ambient Temperature (oC)
Figure 11. Start-up Current vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP384XG
Typical Application
NTC
R19
10
C2
R3
39k
2W
+
C15
2.2n
0.01µ
R2
C14
600V
D3
C11
L3
C10
C12
Z2
J1
1.2M
100µ/400V
8TQ100
1µ
10µ
1000µ
10µ
SA12A
AC 220V
T
D1
+
Byv26e
+
C1 100µ
R4 4.7
C9
2200µ
D2
1N4148
J2
12V/5A
C3
0.1µ
7
2
1
5
8
VCC
VREF
R12
100
R5
C4
10k
3.3n
C8
VFB
RT/CT
4
6
3
C5
0.22µ
220p
R6
C6
1
220p/600V
R16
8.2k
R15
100
COMP OUTPUT
R14
Q1
130k
R7
2k
IRF830
GND
ISENSE
W1
1k
U3
R18
1k
AZ431
C7
680p
U1
R10
0.51/1W
R9
R13
15k
AP384XG
Z1
10k
1N5819
R17
2k
R11
820
U2 PC817
Figure 12. Typical Application of AP384XG in AC/DC Converter
BCD Semiconductor Manufacturing Limited
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