BCD AP3102VP-G1 Green mode pwm controller Datasheet

Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
General Description
Features
The AP3102/V/L series is a green-mode PWM controller with low start-up current. At normal operation, the
switching frequency is externally programmable and
trimmed to tight range, the frequency dithering
technique is also equipped to improve the EMI
performance. When the load is very low or zero, the IC
enters green mode and skip mode to minimize switching loss. In skip mode, the PWM switching frequency
is about 20kHz to avoid the audible noise and reduce
the standby loss.
·
·
·
·
·
·
·
·
·
The AP3102/V/L series features a lot of functions such
as the Leading-Edge Blanking (LEB) of the current
sensing, internal slope compensation, line compensation, and several protection functions including cycleby-cycle current limit (OCP), over voltage protection
(VCC or line voltage), OTP, OLP and brownout protection.
·
·
The AP3102/V/L series provides 3 different versions
with optional protection functions. AP3102 has external trigger latch shutdown only (VOVP and OLP are
auto recoverable). AP3102V supports both VOVP and
external latch shutdown. AP3102L provides latch shutdown control for VOVP, OLP and external trigger.
·
·
Bi-CMOS Process with Excellent Performance
Very Low Start-up Current: 5µA typical
Current Mode Control
Non-audible-noise Green Mode Control
Frequency Foldback for High Average Efficiency
Internal Slope Compensation
Programmable Brownout Protection
Programmable Line Compensation
Useful Pin Fault Protection:
SENSE Pin Floating
RI Pin Short to Ground
RI Pin Floating
Smart Latch/Auto-recoverable Protection Option
Comprehensive Protection Feature:
VCC Over Voltage Protection (VOVP)
Line Over Voltage Protection (LOVP)
Over Temperature Protection (OTP)
Over Load Protection (OLP)
Internal Soft Start Function During Start-up
500mA Gate Output Current Capability
Applications
·
·
·
This IC is available in SOIC-8 and DIP-8 packages.
SOIC-8
Switching AC-DC Adapter
LCD Monitor/TV Power
Open Frame Switching Power Supply
DIP-8
Figure 1. Package Types of AP3102/V/L
Jan. 2010 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Pin Configuration
M Package
(SOIC-8)
P Package
(DIP-8)
GND
1
8
GATE
FB
2
7
VCC
BOK
3
6
SENSE
RI
4
5
ADJ
GND
1
8
GATE
FB
2
7
VCC
BOK
3
6
SENSE
RI
4
5
ADJ
Figure 2. Pin Configuration of AP3102/V/L (Top View)
Pin Description
Pin Number
Pin Name
1
GND
2
FB
Function
Signal ground. Current return for driver and control circuits
Feedback. Directly connected to the opto-coupler
Brownout Protection Pin. Connected to a resistor divider from the ground to bulk
capacitor for setting the brownout level and line compensation. When the voltage of
this pin is lower than 0.5V and lasts 35ms, the PWM signal will be off and system
enters the auto recoverable protection mode (hiccup mode). Moreover this pin is also
for the line OVP (trigger level is 4V) and line compensation (compensate the current
sense for over load protection.)
3
BOK
4
RI
5
ADJ
6
SENSE
7
VCC
Supply voltage of driver and control circuits
8
GATE
Gate driver output
Set the bias current to determine the normal switching frequency
To adjust the level of skip cycle. When its value is greater than 4.5V, the system will be
latched
Current sense
Jan. 2010 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Functional Block Diagram
16.2V
8.8V
7
UVLO
Internal
4
Bias
VCC
155oC
VDD
33V
28V
Latch
OVP
Control
Logic
(Note*)
OVP
OLP
OTP
Latch
OVP
OLP
Disable
BOK
OTP
Protect
Logic
Driver
4.5V
Latch
ADJ
D
OSC
4V
Disable
OLP
1µA
µ
3
5K
FB
2
2R
BOK
1.1V
R
GND
1
0.9V
0.5V
0.85V
2mS
Soft Start
LEB
Note*
GATE
Q
5V
55k
8
15V
CLK
RB
25µA
µ
5
RI
Latch
OVP
Latch
Control Logic for
AP3102
Control Logic for
AP3102 V
BOK
5V
6
SENSE
Latch
OVP
OLP
Control Logic for
AP3102 L
Figure 3. Functional Block Diagram of AP3102/V/L
Jan. 2010 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Ordering Information
AP3102
G1: Green
Circuit Type
TR: Tape and Reel
Blank: Tube
Product Version*
Blank: AP3102
V: AP3102V
L: AP3102L
Package
Temperature Range
Package
M: SOIC-8
P: DIP-8
Part Number
Marking ID
AP3102M-G1
SOIC-8
DIP-8
-40 to 85oC
o
-40 to 85 C
Packing Type
3102M-G1
Tube
AP3102MTR-G1
3102M-G1
Tape & Reel
AP3102VM-G1
3102VM-G1
Tube
AP3102VMTR-G1
3102VM-G1
Tape & Reel
AP3102LM-G1
3102LM-G1
Tube
AP3102LMTR-G1
3102LM-G1
Tape & Reel
AP3102P-G1
AP3102P-G1
Tube
AP3102VP-G1
AP3102VP-G1
Tube
AP3102LP-G1
AP3102LP-G1
Tube
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.
* Product Version Classification (with Different Protection Functions)
Product Version
External Trigger by ADJ
VOVP
Output Short (OLP)
AP3102
Latch
Auto-Recoverable
Auto-Recoverable
AP3102V
Latch
Latch
Auto-Recoverable
AP3102L
Latch
Latch
Latch
Jan. 2010 Rev. 1. 2
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Absolute Maximum Ratings (Note 1)
Parameter
Power Supply Voltage
Gate Output Current
Input Voltage to FB, SENSE pin
Input Voltage to RI, ADJ pin
Symbol
Value
Unit
VCC
30
V
IO
500
mA
VFB, VSENSE
-0.3 to 7
V
VRI, VADJ
-0.3 to 7
V
DIP-8
83
SOIC-8
186
DIP-8
1359
SOIC-8
550
Thermal Resistance Junction to Ambient
θJA
Power Dissipation and Thermal Characteristic, SENSE at TA<25oC
PD
Operating Junction Temperature
TJ
-40 to150
TSTG
150
oC
ESD (Human Body Model)
2500
V
ESD (Machine Model)
250
V
Storage Temperature Range
o
C/W
mW
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.
Recommended Operating Conditions
Parameter
Supply Voltage
Ambient Operating Temperature Range
Symbol
Min
Max
Unit
VCC
10
25
V
TA
-40
85
o
Jan. 2010 Rev. 1. 2
C
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Electrical Characteristics
VCC=16V, TA=25oC, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
5
15
µA
Supply Voltage (VCC Pin)
Start-up Current
ISTART-UP
VCC=14.8V
VFB=0V, CL=1nF
1.5
2.5
3.5
VFB=3V, CL=1nF
2
3
4
UVLO (on)
15.2
16.2
17.2
V
UVLO (off)
7.8
8.8
9.8
V
VCC OVP
27
28.5
30
V
34
V
V
Operating Supply Current
ICC
VCC Clamp
ICC=5mA
De-Latch VCC
4.5
6
7.5
70
75
80
mA
PWM Section/Oscillator Section
Maximum Duty Cycle
Minimum Duty Cycle
0
%
Oscillation Frequency
RRI=26kΩ
60
Frequency in Skip Mode
RRI=26kΩ
22
Frequency Temperature
Stability
-40oC to 85oC
5
%
Frequency Voltage Stability
VCC=12V to 30V
3
%
65
70
kHz
±6
Frequency Dithering
kHz
%
Current Sense Section (SENSE Pin)
VBOK=0.95V
0.75
0.8
0.85
VBOK=2.76V
0.63
0.68
0.73
LEB Time of SENSE
150
250
350
ns
Delay to Output
50
150
250
ns
Maximum SENSE Voltage
VCS
Soft-start Time
2
V
ms
Feedback Input Section (FB Pin)
The Ratio of Input Voltage
to Current Sense Voltage
Input Impedance
Source Current
Input Voltage for Zero Duty
VADJ=0V
Jan. 2010 Rev. 1. 2
2.5
3
3
4.5
3.5
V/V
6
kΩ
-2
mA
1.2
V
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Electrical Characteristics (Continued)
VCC=16V, TA=25oC, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Output Section (GATE Pin)
Output Low Level
IO=50mA, VCC=12V
Output High Level
IO=50mA, VCC=12V
1
8.5
Output Clamping
V
V
13
15
17
V
Rising Time
CL=1nF, VCC=13V
150
250
350
ns
Falling Time
CL=1nF, VCC=13V
30
50
90
ns
Brownout Protection (BOK Pin)
Brownout Turn-on
0.85
0.9
0.95
Brownout Turn-off
0.45
0.5
0.55
5.5
6.2
6.9
V
4.5
V
Clamp Voltage on BOK
IBOK=1mA
Line Compensation Ratio
V
0.055
Line OVP Voltage
3.5
4
Skip Cycle Section (ADJ Pin)
Source Current
10
25
45
µA
Latch Trigger Voltage
4.2
4.5
4.8
V
Clamp Voltage on ADJ
4
5
6
V
Input Impedance
35
50
65
kΩ
Over-Temperature Protection Section
Shutdown Temperature
155
oC
Temperature Hysteresis
25
oC
Delay Time Section
Delay 1 of Protection
Output short and OLP,
BOK pin trigger for turning off
Delay 2 of Protection
ADJ, VCC OVP, Line OVP
BOK pin trigger for turning on
Jan. 2010 Rev. 1. 2
25
35
25
45
ms
µs
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Typical Performance Characteristics
17.0
9.9
16.8
9.7
Shutdown Voltage (V)
Start-up Voltage (V)
16.6
16.4
16.2
16.0
15.8
15.6
15.4
9.3
9.1
8.9
8.7
8.5
8.3
15.2
15.0
-40
9.5
8.1
-20
0
20
40
60
80
100
-40
120
-20
0
20
40
60
80
100
120
140
o
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 5. Shutdown Voltage vs. Ambient Temperature
Figure 4. Start-up Voltage vs. Ambient Temperature
4
8
Operation Current (mA)
7
Start-up Current (µA)
6
5
4
3
2
3
2
1
1
0
-40
-20
0
20
40
60
80
100
0
-40
120
o
Ambient Temperature ( C)
-20
0
20
40
60
80
100
120
140
o
Ambient Temperature ( C)
Figure 6. Start-up Current vs. Ambient Temperature
Figure 7. Operation Current vs. Ambient Temperature
Jan. 2010 Rev. 1. 2
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Typical Performance Characteristics (Continued)
0.86
1.00
0.98
At VBOK=0.95V
0.84
0.94
0.80
0.92
VBOK (V)
Maximum VCS (V)
0.96
0.82
0.78
0.90
0.88
0.76
0.86
0.74
0.84
0.72
0.70
-40
0.82
-20
0
20
40
60
80
100
0.80
-40
120
-20
0
20
40
60
80
100
120
o
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 9. VBOK vs. Ambient Temperature
Figure 8. Maximum VCS vs. Ambient Temperature
200
30.00
180
fOSC Typical
29.75
29.50
140
29.25
fOSC (kHz)
VCC OVP Voltage (V)
160
29.00
28.75
120
100
80
60
28.50
40
28.25
28.00
-40
20
-20
0
20
40
60
80
100
120
10
140
15
20
25
30
35
40
45
Bias Resistor (kΩ)
o
Ambient Temperature ( C)
Figure 10. VCC OVP Voltage vs. Ambient Temperature
Jan. 2010 Rev. 1. 2
Figure 11. Oscillation Frequency vs. Bias Resistor
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Typical Performance Characteristics (Continued)
8.0
90
fOSC Typical
VCC Start-up Current (µA)
fOSC (kHz)
80
70
60
50
40
-40
6.0
4.0
2.0
0.0
-20
0
20
40
60
80
100
120
140
0
4
8
12
16
VCC (V)
o
Ambient Temperature ( C)
Figure 13. VCC Start-up Current vs. VCC Voltage
Figure 12. Oscillation Frequency
vs. Ambient Temperature (R8=27kΩ)
4
ICC (mA)
3
2
1
0
0
4
8
12
16
20
24
VCC (V)
Figure 14. Operation Current vs. VCC Voltage
Jan. 2010 Rev. 1. 2
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Operation Description
The AP3102/V/L 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 versatile protection functions
for system designer.
Start-up Current and UVLO
The start-up current of AP3102/V/L 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.
An UVLO comparator is included in AP3102/V/L to
detect the voltage on the VCC pin. It ensures AP3102/
V/L to draw adequate energy from hold-up capacitor
during power on. The turn-on threshold is 16V and the
turn-off threshold is 10V.
Oscillator
The oscillation frequency is programmed by the value
of resistor R8, 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.
The oscillation frequency can be expressed as:
f ≈
relation between peak inductor current (IPK) and VFB
is:
I PK = (VFB − 0.9) / 3RS
Abnormal operating conditions occur when the power
supply output is overloaded or the output voltage
sensing is lost. Under these conditions, the current
sense comparator threshold will be internally clamped
to a value related to the value of VBOK. As VBOK value
is proportional to the input line voltage, the constant
over load protection can be achieved by compensating
the delay time effect from the input line. The
maximum peak switch current is:
I PK ( MAX ) = (0.85 − 0.055 × VBOK ) / RS
Leading-edge Blanking
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. A resistor is usually connected to the
current sense pin to avoid the PCB trace interference
and it also can adjust the inductor peak current tinily by
the resistance. Of course, adding a RC filter to CS pin
is better to attenuate any unexpected noise.
Built-in Slope Compensation
1720
(kHz )
R8(kΩ)
It is well known that a continuous current mode SMPS
may become unstable when the duty cycle exceeds
50%. The built-in slope compensation can improve the
stability, so there is no need for design engineer to
spend much time on that.
The recommended oscillation frequency is 40 to 130
kHz from the EMI consideration.
Current Sense Comparator and PWM
Latch
AP3102/V/L operates as a current mode controller; the
output switch conduction is initiated by every
oscillator cycle and 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
RS. The inductor current under normal operating
conditions is controlled by the voltage at FB pin, the
Jan. 2010 Rev. 1. 2
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 optcoupler is broken) and lasts for about 35ms, the IC will
enter the protection mode. For AP3102, 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. For AP3102V, the IC will be latched
unless unplugging the AC socket. Moreover, if the
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Operation Description (Continued)
ADJ Pin and Green Mode Operation
voltage is less than 0.7V, the IC will stop the drive
pulse immediately. Therefore, this feature can be used
for short circuit protection, which makes the system
immune from catastrophic failure.
Low standby loss is the main requirement for AC-DC
off line power supply. The AP3102/V/L has a green
mode operation to improve the light load or no load
efficiency. When the load power becomes low and VFB
decreases to the threshold value, the IC will enter the
green mode which means the switching frequency will
decrease with the load decrease. And when the load
power becomes more lower, the IC will operate at the
skip mode to reduce switching loss , core loss and other
high frequency loss due to blanking the driver. In
skipping mode, the high frequency pulses is about
25kHz for the best standby performance.
Brown-out and BOK Pin
The switching converter normally has a suitable input
range thus make the switching component operate
under the safe operation condition. Too low or too high
input will bring large heat shock or voltage spike on
the switching device. Brown-out and line OVP
function will avoid the supply to be worked in the
unwanted condition such as below minimum and over
maximum line voltage. The internal BOK connection
is shown as the figure below:
VCB
OVP
4V
1 µA
Disable
3
OCP
BOK
0.85V
BOK
0 .9V
0 .5V
5
Skip Cycle
+
R1
UVLO
BOK
5V
ADJ
25µA
Driver
Control
Circuit
RADJ
2R
Slope
Compensation
R2
A
2
FB
R
LEB
6
SENSE
0.85V
6
SENSE
The VADJ threshold is adjustable by changing the
external resistor connected from pin ADJ to the
ground. Adjusting the VADJ voltage can optimize the
standby power and audible noise for most applications.
From the figure, it is seen that the BOK is connected to
the OCP comparator and used as feedforward to the
VCS_MAX (Refer to current sense comparator
description). The VBOK range for enable IC is 0.9 to
3.0V and disable range is under 0.5V or over than 4V.
When VBOK is over than 4V (line OVP) or under 0.5V
(brown-out trigger), the IC enters the auto-recoverable
protection. The ratio of R1/R2 is used to adjust the line
voltage divider value.
Another function of ADJ pin is to use it as the latch
trigger input. When the voltage at this pin is over than
4.5V, the system will be latched by limiting the VCC to
a lower voltage. If the IC is started from bulk capacitor
through resistor, the system will be latched until the
bulk voltage decreases to a very low value just like
unplugged the AC input. Then, the IC latch current
can't be maintained and latch will be released (see
description below). This function can be used as
system OTP and other protection..
4V
HV
VON
HV OK Range
VOFF
VCC
UVLO
No Gate Output
35mS
No Gate
No Gate Output
Jan. 2010 Rev. 1. 2
System Protection
Protection
and
Pin
Fault
AP3102/V/L provides versatile system and pin fault
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Operation Description (Continued)
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 protect
the power system. Figure 15 shows the relative timing
sequences of system protections.
protections. The OCP comparator realizes the cycleby-cycle current limiting (OCP). Cooperating with
BOK compensation from the 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 AP3102/V/
L also has pin fault connection protection including
Line OVP & Brown-Out
Output Short
VCC OVP (AP3102)
Vo
VBOK
VFB
4V
4.2V
25µS
35mS
0.5V
28V
25µS
35mS
VCC
UVLO
Gate drive
Auto Recoverable Protection Mode
Latch through ADJ Pin
Output Short (AP3102L)
Vo
VFB
4V
>25µS
VADJ
VCC
4.2V
35mS
VADJ
VCC OVP
(AP3102V, AP3102L)
28V
25µS
UVLO
UVLO
Gate
drive
De-latch Point
Latch until unplug AC
Latch Protection Mode
Figure 15. Typical Timing Sequences of AP3102/V/L Protections
Jan. 2010 Rev. 1. 2
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Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Typical Application
R9 10
VCB
BD1
CX1
C1
100µF
J1
C2
2nF
R2
100k
R1
2M
C3
3.3 µF
12V/3A
Q1
7N60
1k
R6
0.55
R7
18 k
7
5
6
VCC SENSE
FB
1
2
B OK
3
CY
R12
4.7 k
ADJ
Q2
AZ431
R13
620
RI
4
R10
20 k
R11
5.1 k
U1
AP3102
GND
J2
C7
470 µF
C8 0.1µF
C9
0.1 µF
R4
10 M
L2
8µH
R3
3.9
C4
47 µF
R14
8
D3
C 10
1000µF
R4 20
GATE
T
D1
FR107
D2
D4
C9
1nF
R8 27k
U2 P817
R5
82k
C5
10nF
C6
6.8nF
4
1
3
2
Figure 16. Typical Application Circuit Using AP3102
Jan. 2010 Rev. 1. 2
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14
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Mechanical Dimensions
DIP-8
Unit: mm(inch)
0.700(0.028)
7.620(0.300)TYP
1.524(0.060) TYP
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
0.360(0.014)
0.560(0.022)
5°
6°
2.540(0.100) TYP
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)
Note: Eject hole, oriented hole and mold mark is optional.
Jan. 2010 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
15
Preliminary Datasheet
GREEN MODE PWM CONTROLLER
AP3102/V/L
Mechanical Dimensions (Continued)
SOIC-8
4.700(0.185)
5.100(0.201)
7°
Unit: mm(inch)
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)
0.800(0.031)
0.200(0.008)
0°
8°
1.000(0.039)
3.800(0.150)
4.000(0.157)
0.330(0.013)
0.510(0.020)
0.190(0.007)
0.250(0.010)
0.900(0.035)
1°
5°
R0.150(0.006)
0.450(0.017)
0.800(0.031)
Note: Eject hole, oriented hole and mold mark is optional.
Jan. 2010 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
16
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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BCD Semiconductor
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cations
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