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 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.
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: 50µA (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
Oct. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
1
Data Sheet
GREEN MODE PWM CONTROLLER
Pin Configuration
M Package
(SOIC-8)
COMP
FB
CS
R
T
/C
T
COMP
FB
CS
R
T
/C
T
1
2
3
4
AP384XG
P Package
(DIP-8)
8
7
6
5
1
2
3
4
8
7
6
5
REF
VCC
OUTPUT
GND
REF
VCC
OUTPUT
GND
Figure 2. Pin Configuration of AP384XG (Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
COMP
FB
CS
R
T
/C
T
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 R
T
to REF and capacitor C
T
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 C
T
through resistor R
T
.
Oct. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
2
Data Sheet
GREEN MODE PWM CONTROLLER
Functional Block Diagram
VCC
GND
7
34V
UVLO
S/R
5V
REF
AP384XG
5
2.50V
8
REF
INTERNAL
BIAS
R
T
/C
T
4
VREF
GOOD
LOGIC
OSC
OVER TEMP
PROTECT
S
ERROR
AMP
Q
Q
PWM
CURRENT LATCH
SENSE
COMPARATOR
6
OUTPUT
FB
COMP
CS
2R
1V
2
1
3
R
R
Figure 3. Functional Block Diagram of AP384XG
Ordering Information
AP384XG
Circuit Type
Package
M: SOIC-8
P: DIP-8
Tempera-
ture Range
-40 to 85
o
C
Part Number
Lead Free
AP3842/3/4/5GM-E1
Green
AP3842/3/4/5GM-G1
AP3842/3/4/5GP-G1
-
E1: Lead Free
G1: Green
TR: Tape and Reel
Blank: Tube
Package
SOIC-8
DIP-8
Marking ID
Lead Free
3842/3/4/5GM-E1
Green
3842/3/4/5GM-G1
3842/3/4/5GM-G1
Packing
Type
Tube
Tape & Reel
Tube
AP3842/3/4/5GMTR-E1 AP3842/3/4/5GMTR-G1 3842/3/4/5GM-E1
-40 to 85
o
C AP3842/3/4/5GP-E1
AP3842/3/4/5GP-E1 AP3842/3/4/5GP-G1
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
Oct. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
3
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 T
A
< 25
o
C (DIP-8)
Power Dissipation at T
A
<25
o
C (SOIC-8)
Storage Temperature Range
Ambient Temperature
Lead Temperature (Soldering, 10sec)
ESD (Machine Model)
Symbol
V
CC
I
O
V(ANA)
I
SINK
(E.A)
P
D
(Note 3)
P
D
(Note 3)
T
STG
T
A
T
LEAD
Value
30
Unit
V
A
V
mA
mW
mW
o
C
o
C
o
AP384XG
±
1
-0.3 to 6.3
20
1000
460
-65 to 150
-40 to 85
+300
300
C
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 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
Parameter
Oscillation Frequency
Ambient Temperature
Symbol
f
T
A
-40
Min
Max
500
85
Unit
KHz
o
C
Oct. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
4
Data Sheet
GREEN MODE PWM CONTROLLER
Electrical Characteristics
(V
CC
=15V, R
T
=10kΩ C
T
=3.3nF, T
A
= -40 to 85
o
C, 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
≤
V
CC
≤
25V
V
RT/CT
= 2V (Note 4)
8.5
f
V
OSC
T
J
=25
o
C
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
%
%
V
CC
=14V
V
FB
=0, V
CS
=0, C
L
=1nF
V
FB
=2.7V, V
CS
=0.5V
I
CC
=25mA
30
50
8
6
34
80
µA
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
∆V
REF
∆V
REF
I
SC
V
REF
T
J
=25
o
C, I
REF
=1mA
Line, Load, Temp.
12V
≤
V
CC
≤25V
1mA
≤
I
REF
≤20mA
T
A
=25
o
C
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/
o
C
Symbol
Conditions
Min
Typ
Max
Unit
AP384XG
Note 4: This parameter is measured with RT=10k
Ω
to V
REF,
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.
Oct. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
5
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