AP3103 [BCDSEMI]
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER; 多才多艺成本效益的绿色PWM控制器
| 型号： | AP3103 |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER |
| 文件： | 总14页 (文件大小：797K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103
General Description
Features
The AP3103 is a low startup current, current mode
PWM controller with green-mode power-saving opera-
tion. The PWM switching frequency at normal opera-
tion is externally programmable and is trimmed to a
tigh range. The dithering of frequency will improve
EMI feature. When the load decreases, the frequency
will reduce and when at a very low load, the IC will
enter the ‘skip mode’to minimize switching loss.
About 20kHZ frequency switching is aviode the audi-
ble noise as well as reduding the standby loss.
·
·
·
·
·
·
·
Bi-CMOS Process with Excellent Performance
Very Low Start-up Current:(
Current Mode Control
< 15µA)
Non-audible-noise Green-mode Control
LEB (Leading-edge Blanking) on CS Pin
Internal Slope Compensation
Frequency Fold Back for High Average Effi-
ciency
Soft Switching for Reducing EMI
Useful Pin Fault Protection:
CS Pin Floating
·
·
The AP3103 features a lot of functions such as the
Leading-Edge Blanking (LEB) of the current sensing,
internal slope compensation and several protection
functions including cycle-by-cycle current limit
(OCP), VCC Over Voltage Protection (VOVP), OTP,
OLP protection.
RI Pin Short to Ground
RI Pin Floating
FB/Opt-coupler Open/short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Temperature Protection (OTP)
Over Load Protection (OLP)
Mini Size with Packages
·
·
This IC is available in SOT-23-6 and DIP-8 packages.
Applications
·
·
·
·
Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power
Set-top Box(STB) Power Supply
Open Frame Switching Power Supply
SOT-23-6
DIP-8
Figure 1. Package Types of AP3103
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
AP3103
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Pin Configuration
K Package
(SOT-23-6)
P Package
(DIP-8)
Pin 1 Dot by Marking
GATE
VCC
1
2
8
7
GND
6
5
4
GATE
VCC
GND
FB
1
2
3
FB
NC
3
4
6
5
NC
RI
SENSE
RI
SENSE
Figure 2. Pin Configuration of AP3103 (Top View)
Pin Description
Pin Number
Pin Name
Function
SOT-23-6
DIP-8
1
2
3
4
5
6
8
7
GND
Signal ground. Current return for driver and control circuits
FB (COMP) Feedback. Directly connected to the opto-coupler
5
RI
SENSE
VCC
GATE
NC
Set the bias current to determine the normal switching frequency
4
Current Sense
2
Supply voltage of driver and control circuits
Gate driver output
1
3, 6
No connection. These pins are not internally connected
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
AP3103
Functional Block Diagram
15V
8.8V
Internal Bias
&VREF
O/S
Protection
3
UVLO
RI
5
VCC
35.5V
VCC
28V
OTP
OVP
OVP
OLP
17.5V
6
Driver
GATE
D
QB
DFF
CLK
OSC
RB
140℃
VDD
OTP
0.6V
2
FB
Line
Compensation
1.1V
OLP
OCP
PWM
FOCP
V
0.85
Soft
Start
1
4
250ns
LEB
GND
SENSE
Figure 3. Functional Block Diagram of AP3103
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
AP3103
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Ordering Information
AP3103
-
G1: Green
Circuit Type
TR: Tape and Reel
Blank: Tube
Package
K: SOT-23-6
P: DIP-8
Package
SOT-23-6
DIP-8
Temperature Range
Part Number
Marking ID
Packing Type
-40 to 85oC
-40 to 85oC
AP3103KTR-G1
AP3103P-G1
GHL
Tape & Real
Tube
AP3103P-G1
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Absolute Maximum Ratings (Note 1)
AP3103
Parameter
Symbol
VCC
Value
30
Unit
V
Power Supply Voltage
Gate Output Current
IO
mA
300
VFB, VSENSE
Input Voltage to FB, SENSE pin
-0.3 to 7
V
SOT-23-6
DIP-8
250
100
oC/W
θJA
Thermal Resistance Junction to Ambient
SOT-23-6
DIP-8
500
Power Dissipation and Thermal Charac-
teristic, SENSE at TA<25oC
PD
mW
oC
1250
TJ
Operating Junction Temperature
-40 to150
oC
V
TSTG
Storage Temperature Range
ESD (Human Body Model)
ESD (Machine Model)
150
3000
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 Max-
imum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
VCC
Min
10
Max
25
Unit
V
Supply Voltage
oC
Ambient Operating Temperature Range
TA
-40
85
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
AP3103
Electrical Characteristics
VCC=16V, TA=25oC, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply Voltage (VCC Pin)
Start-up Current
ISTART-UP VCC=14.8V
5
2
15
3
µA
VFB=0V, CL=1nF, RRI=100kΩ
VFB=3V, CL=1nF, RRI=100kΩ
1
0.65
14
ICC
Operating Supply Current
mA
1.65
15
2.65
16
UVLO (on)
V
V
V
V
UVLO (off)
7.8
27
8.8
28
9.8
29
VCC OVP
VCC Clamp
I
CC=5mA
34
35.5
37
PWM Section/Oscillator Section
Maximum Duty Cycle
Minimum Duty Cycle
Oscillation Frequency
Green Mode Frequency
70
75
0
80
70
%
R
RI=100kΩ
60
22
65
kHz
kHz
RRI=100kΩ
Frequency Temperature
Stability
-40oC to 85oC
VCC=12 to 30V
5
3
%
Frequency Voltage Stability
Frequency Dithering
%
%
±6
Current Sense Section (SENSE Pin)
Maximum SENSE Voltage
LEB Time of SENSE
Delay to Output
VCS
VFB=3.3V, RRI=100kΩ
0.800
150
50
0.850
250
150
0.5
0.900
350
V
ns
ns
ms
250
Soft-start Time
Feedback Input Section (FB Pin)
The Ratio of Input Voltage
to Current Sense Voltage
2.5
3
3.5
V/V
Input Impedance
3
4.5
-1
6
kΩ
mA
V
Source Current
V
FB=0V
-0.5
-1.5
Input Voltage for Zero Duty
1.5
Output Section (GATE Pin)
Output Low Level
Output High Level
Output Clamping
Rising Time
IO=20mA, VCC=12V
IO=20mA, VCC=12V
1
V
V
8
16
17.5
220
50
19
320
90
V
CL=1nF, VCC=13V
CL=1nF, VCC=13V
120
30
ns
ns
Falling Time
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
AP3103
Electrical Characteristics
VCC=16V, TA=25oC, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Over Temperature Protection Section
Shutdown Temperature
Temperature Hysteresis
Delay Time Section
oC
oC
140
20
Delay 1 of Protection
OLP
35
25
ms
Delay 2 of Protection
VCC OVP
µs
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
AP3103
Typical Performance Characteristics
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
7.8
15.4
15.2
15.0
14.8
14.6
14.4
14.2
14.0
13.8
13.6
-40
-20
0
20
40
60
80
100
120
140
-60
-40
-20
0
20
40
60
80
100 120 140 160
Ambient Temperature (oC)
Ambient Temperature (oC)
Figure 5. Shutdown Voltage vs. Ambient Temperature
Figure 4. Start-up Voltage vs. Ambient Temperature
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
140
Ambient Temperature (oC)
Ambient Temperature (oC)
Figure 6. Start-up Current vs. Ambient Temperature
Figure 7. Operation Current vs. Ambient Temperature
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103
Typical Performance Characteristics (Continued)
28.4
75.0
72.5
28.2
70.0
28.0
27.8
27.6
27.4
67.5
65.0
62.5
60.0
57.5
55.0
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
40
60
80
100
120
140
Ambient Temperature (oC)
Ambient Temperature (oC)
Figure 9. fOSC vs. Ambient Temperature
Figure 8. VCC OVP vs. Ambient Temperature
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
AP3103
pin, the relation between peak inductor current (I
)
Operation Description
PK
and V is:
The AP3103 is specifically designed for off-line AC-
DC power supply used in LCD monitor, notebook
adapter and battery charger applications. It offers a cost
effective solution with a versatile protection function.
FB
IPK = (VFB − 0.8) / 3RS
Start-up Current and UVLO
Leading-edge Blanking
The start-up current of AP3103 is optimized to realize
ultra low current (5µA typical) so that VCC capacitor
can be charged more quickly. The direct benefit of low
start-up current is the availability of using large start-
up resistor, which minimizes the resistor power loss for
high voltage AC input.
A narrow spike on the leading edge of the current
waveform can usually be observed when the power
MOSFET is turned on. A 250ns leading-edge blank is
built-in to prevent the false-triggering caused by the
turn-on spike. During this period, the current limit
comparator is disabled and the gate driver can not be
switched off.
An UVLO comparator is included in AP3103 to detect
the voltage on the VCC pin. It ensures that AP3103 can
draw adequate energy from hold-up capacitor during
power on. The turn-on threshold is 15V and the turn-
off threshold is 8.8V.
FB Pin and Short Circuit Protection
This pin is normally connected to the opt-coupler and
always paralleled with a capacitor for loop
compensation. When the voltage at this pin is great
than 4.2V (such as output short to ground or the opt-
coupler is broken) and lasts for about 25ms, the IC will
enter the protection mode. For AP3103, the system will
enter hiccup mode to wait the VCC decreasing to low
UVLO level, then the IC will try to restart until the
failure removed. And when this voltage is less than
1.5V, the IC will stop the drive pulse immediately.
Therefore, this feature can be used for short circuit
protection, which makes the systemimmune from
catastrophic failure. Normally, output short makes the
VFB value to the maximum because the opt-coupler is
cut off.
Oscillator
The oscillation frequency is programmed by the value
of resistor R1, connected from pin RI to ground. The
resistor will make a constant current source to
determine the oscillation frequency by charging and
discharging an internal capacitor. Normally, RI pin
should not be placed where exists too much noise, as
the disturbance may make the IC work abnormally.
The oscillation frequency can be expressed as:
6500
f ≈
(kHz)
R1(kΩ)
System Protection and Pin Fault
Protection
The recommended oscillation frequency is 50 to 100
kHz from the EMI consideration.
The AP3103 provides versatile system and pin fault
protections. The OCP comparator realizes the cycle-
by-cycle current limiting (OCP).In universal input line
voltage, the IC realizes the constant over load
protection (OLP). VCC over voltage protection can be
applied as the primary OVP or opt-coupler broken
protection. The AP3103 also has pin fault connection
protection including floating and short connection. The
floating pin protection include the RI, SENSE, FB, etc;
The short pin protection includes the RI pin short
protection. When these pins are floated or RI pin is
shorted to ground, PWM switching will be disabled,
thus protecting the power system.
Current Sense Comparator and PWM
Latch
The AP3103 operates as a current mode controller; the
output switch conduction is initiated by every
oscillator cycle and is terminated when the peak
inductor current reaches the threshold level established
by the FB pin. The inductor current signal is converted
to a voltage signal by inserting a reference sense
resistor R . The inductor current under normal
S
operating conditions is controlled by the voltage at FB
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
AP3103
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Typical Application
L2
T1
C6
R6
C5
R4
C2
R13
C8
C7
-
~
~
R5
R19
C4
C3
U1
R14
R8
R2
R3
VCC
OUT
CS
R10
R15
R16
R9
C1
C10
C11
RI
R11
R12
R17
R18
AP3103
VR1
AZ431
C9
FB
R7
GND
~
U2
Figure 10. Typical Application of AP3103
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Mechanical Dimensions
AP3103
SOT-23-6
Unit: mm(inch)
0°
8°
2.820(0.111)
3.020(0.119)
0.300(0.012)
0.400(0.016)
0.200(0.008)
0.300(0.012)
0.600(0.024)
6
5
4
Pin 1 Dot by Marking
1
2
3
0.700(0.028)REF
0.950(0.037)TYP
0.100(0.004)
0.200(0.008)
0.000(0.000)
0.100(0.004)
1.800(0.071)
2.000(0.079)
0.900(0.035)
1.300(0.051)
1.450(0.057)
MAX
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
Mechanical Dimensions (Continued)
AP3103
DIP-8
Unit: mm(inch)
0.700(0.028)
7.620(0.300)TYP
5°
1.524(0.060) TYP
6°
3.200(0.126)
3.600(0.142)
3.710(0.146)
4.310(0.170)
0.510(0.020)MIN
3.000(0.118)
3.600(0.142)
0.204(0.008)
0.360(0.014)
0.254(0.010)TYP
8.200(0.323)
9.400(0.370)
2.540(0.100)TYP
0.130(0.005)MIN
0.360(0.014)
0.560(0.022)
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)
Note: Eject hole, oriented hole and mold mark is optional.
Feb. 2010 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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