BCD AP3844GM Green mode pwm controller Datasheet

Data Sheet
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.
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
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
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
Aug. 2005 Rev. 1. 2
1
Data Sheet
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
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
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
6
OUTPUT
The ground pin.
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
Aug. 2005 Rev. 1. 2
2
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Functional Block Diagram
VCC
7
34V
GND
UVLO
8
5V
REF
S/R
5
INTERNAL
BIAS
2.50V
RT/CT
REF
VREF
GOOD
LOGIC
4
6
OUTPUT
OSC
OVER TEMP
PROTECT
S
ERROR
AMP
FB
COMP
CS
2R
R
2
1
R
1V
3
Q
Q
PWM
CURRENT LATCH
SENSE
COMPARATOR
Figure 3. Functional Block Diagram of AP384XG
Ordering Information
AP384XG
E1: Lead Free
Blank: Tin Lead
Circuit Type
TR: Tape and Reel
Blank: Tube
Package
M: SOIC-8
P: DIP-8
Package
Temperature Range
SOIC-8
-40 to 85oC
DIP-8
-40 to 85oC
Part Number
Marking ID
Packing
Type
Tin Lead
Lead Free
Tin Lead
Lead Free
AP3842/3/4/5GM
AP3842/3/4/5GM-E1
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
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.
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
3
Data Sheet
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
oC
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)
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
Symbol
Oscillation Frequency
f
Ambient Temperature
TA
Min
-40
Max
Unit
500
KHz
85
oC
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
4
Data Sheet
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
50
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
Aug. 2005 Rev. 1. 2
5
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
2.55
V
ERROR AMPLIFIER SECTION
VI
VCOMP=2.5V
2.45
2.50
ISINK
VCOMP=1.1V
6
10
mA
-0.5
-0.8
mA
Input Voltage
Output Sink Current
Output Source Current
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
Aug. 2005 Rev. 1. 2
6
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Electrical Characteristics (Continued)
VREF
4.7k
1k
ERROR AMP
ADJUST
RT
A
1
COMP
REF
8
2
FB
VCC
7
VCC
100k
0.1µF
5k
4.7k
AP3842G
2N2222
ISENSE
ADJUST
3
CS
4
RT/CT
OUTPUT
6
GND
5
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
Aug. 2005 Rev. 1. 2
7
Data Sheet
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
0
120
0
o
Ambient Temperature ( C)
2
4
6
8
10
12
14
16
18
Supply Voltage (V)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Start-up Current vs. Supply Voltage
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
8
Data Sheet
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
-0.5
50
100
150
200
250
300
350
400
450
500
550
0
10
600
Output Sink Current (mA)
VCC=15V, TA=25 C
60
0.5
0
o
70
o
VCC=15V, TA=25 C
3.0
100
1k
10k
100k
1M
Frequency (Hz)
Figure 9. Output Saturation Characteristics
Figure 10. Error Amplifier Open-Loop Frequency Response
60
Start-up Current (µA)
50
AP3842G
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
Aug. 2005 Rev. 1. 2
9
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Typical Application
NTC
C14
100µ/400V
C2
0.01µ
600V
+
R20
1M
R2
1.2M
JP1
AC
90 to 264V
R3
39k
2W
R19
10
C15
2.2n
D3
8TQ100
T
D1
FR107
C1 47µ
L3
10µ
C10
1000µ
R21
3k
+
C9
2200µ
D2
1N4001
7
JP2
12V/5A
C3
0.1µ
Vcc
VCC
REF
8
R12
100
R5
10k
2
FB
1
COMP
5
GND
RT/CT
4
OUTPUT
6
C5
220p
R14
130k
CS
3
C4
3.3n
C8
0.22µ
C6
220p/600V
R6
10
R7
2k
R15
100
C7
680p
Z1
1N5819
R16
8.2k
Q1
IRF830
U3
AZ431
U1
AP384XG
R13
15k
Z2
SA12A
+
+
R4 4.7
C11
1µ
W1
1k
R10
0.51/1W
R9
10k
R18
1k
R17
2k
R11
820
U2 PC817
Figure 12. Typical Application of AP384XG in AC/DC Converter
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
10
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Mechanical Dimensions
SOIC-8
Unit: mm(inch)
4.800(0.189)
5.000(0.197)
7°
0.320(0.013)
1.350(0.053)
1.750(0.069)
8°
8°
7°
0.675(0.027)
0.725(0.029)
D
5.800(0.228)
1.270(0.050)
6.200(0.244)
TYP
D
20:1
0.300(0.012)
R0.150(0.006)
0.100(0.004)
φ 0.800(0.031)
0.200(0.008)
0°
8°
1.000(0.039)
3.800(0.150)
4.000(0.157)
1°
5°
0.330(0.013)
0.510(0.020)
0.900(0.035)
R0.150(0.006)
0.190(0.007)
0.250(0.010)
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
11
Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Mechanical Dimensions (Continued)
DIP-8
Unit: mm(inch)
0.700(0.028)
7.620(0.300)TYP
1.524(0.060) TYP
6°
5°
6°
3.200(0.126)
3.600(0.142)
3.710(0.146)
4.310(0.170) 4°
4°
0.510(0.020)MIN
3.000(0.118)
3.600(0.142)
0.204(0.008)
0.360(0.014)
8.200(0.323)
9.400(0.370)
0.254(0.010)TYP
2.540(0.100) TYP
0.360(0.014)
0.560(0.022)
0.130(0.005)MIN
6.200(0.244)
6.600(0.260)
R0.750(0.030)
Φ3.000(0.118)
Depth
0.100(0.004)
0.200(0.008)
9.000(0.354)
9.400(0.370)
BCD Semiconductor Manufacturing Limited
Aug. 2005 Rev. 1. 2
12
http://www.bcdsemi.com
BCD Semiconductor Corporation
3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411, U.S.A
Tel: +1-408-988 6388, Fax: +1-408-988 6386
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
800 Yi Shan Road, Shanghai 200233, PRC
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
Advanced Analog Circuits (Shanghai) Corporation
8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC
Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
BCD Semiconductor (Taiwan) Company Limited
4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan
Tel: +886-2-2656-2808, Fax: +886-2-2656-2806
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.
Similar pages