ANALOGICTECH AP384XG

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