ACTIVE-SEMI ACT511US-T Activeqr quasi-resonant pwm controller Datasheet

ACT511
Product Brief, 05-Dec-12
ActiveQRTM Quasi-Resonant PWM Controller
FEATURES
good margin.
• Quasi-Resonant Operation
ACT511 integrates comprehensive protection. In
case of over temperature, over voltage, short
winding, short current sense resistor, open loop an
d overload conditions, it would enter into auto
restart mode including Cycle-by-Cycle current
limiting.
• Adjustable up to 75kHz Switching Frequency
• Accurate OCP/OLP Protection
• Integrated Patented Frequency Foldback
Technique
ACT511 is to achieve no overshoot and very short
rise time even with big capacitive load (4000µF)
with the built-in fast and soft start process.
• Integrated Patented Line and Primary
Inductance Compensation
• Built-in Soft-Start Circuit
• Line Under-Voltage, Thermal, Output Over•
•
•
•
voltage, Output Short Protections
The Quasi-Resonant (QR) operation mode can
effectively improve efficiency, reduce the EMI noise
and further reduce the components in input filter.
Current Sense Resistor Short Protection
ACT511 is for application up to 60 Watt.
Transformer Short Winding Protection
Figure 1:
100mW Standby Power
Simplified Application Circuit
Complies with Global Energy Efficiency and
CEC Average Efficiency Standards
• Tiny SOT23-6 Packages
APPLICATIONS
• AC/DC Adaptors/Chargers for Cell Phones,
Cordless Phone, PDAs, E-books
• Adaptors for Portable Media Player, DSCs,
Set-top boxes, DVD players, records
• Linear Adapter Replacements
GENERAL DESCRIPTION
The ACT511 is a high performance peak current
mode PWM controller. ACT511 applies ActiveQRTM
and frequency foldback technique to reduce EMI
and improve efficiency. ACT511’s maximum
switching frequency is set at 90kHz. Very low
standby power, good dynamic response and
accurate voltage regulation is achieved with an
opto-coupler and the secondary side control circuit.
The burst mode operation enables low standby
power of 100mW with small output voltage ripple.
By applying frequency foldback and ActiveQRTM
technology, ACT511 increases the average system
efficiency compared to conventional solutions and
exceeds the latest ES2.0 efficiency standard with
Innovative PowerTM
ActiveQRTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
ACT511
Product Brief, 05-Dec-12
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
PACKAGE
PINS
PACKING
METHOD
ACT511US-T
-40°C to 85°C
SOT23-6
6
TUBE & REEL
TOP MARK
FSGT
PIN CONFIGURATION
SOT23-6
ACT511US
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
CS
2
GND
Ground.
3
GATE
Gate Drive. Gate driver for the external MOSFET transistor.
4
VDD
Power Supply. This pin provides bias power for the IC during startup and steady state operation.
5
VDET
Valley Detector Pin. Connect this pin to a resistor divider network from the auxiliary winding to
detect zero-crossing points for valley turn on operation.
6
FB
Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak
current limit for the primary switch.
Feedback Pin. Connect this pin to optocouplers’s collector for output regulation.
Innovative PowerTM
ActiveQRTM is a trademark of Active-Semi.
-2-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
ACT511
Product Brief, 05-Dec-12
Figure 4:
Universal VAC Input, 5V/3A Output Adaptor
Innovative PowerTM
ActiveQRTM is a trademark of Active-Semi.
-3-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
ACT511
Product Brief, 05-Dec-12
Table 1:
ACT511 5V15W Bill of Materials
ITEM REFERENCE
DESCRIPTION
QTY
MANUFACTURER
IC, ACT511, SOT23-6
1
Active-Semi
Capacitor, Electrolytic, 15µF/400V, 12 × 14mm
2
KSC
1
U1
2
C1,C2
3
C3
Capacitor, Ceramic,1000pF/500V,0805,SMD
1
POE
4
C4
Capacitor, Electrolytic, 4.7µF/35V, 5 × 11mm
1
KSC
5
C5,C6
Capacitor, Electrolytic, 820µF/10V, 10 × 11.5mm
2
KSC
6
C7,C8
Capacitor, Ceramic, 0.1µF/25V,0805,SMD
2
POE
7
C9
Capacitor, Ceramic,1000pF/100V,0805,SMD
1
POE
8
Cfb
Capacitor, Ceramic,1000pF/50V,0805,SMD
1
POE
9
D1-D4
Diode, Rectifier ,1000V1A, 1N4007, DO-41
4
Good-Ark
10
D5,D6
Diode, Ultra Fast, FR107,1000V/1.0A, DO-41
2
Good-Ark
11
D8
Diode, Schottky, 40V/30A, SBL3040, DO-220
1
Good-Ark
12
L1
DM Inductor, 1.5mH,R5
1
SoKa
13
L2
DM Inductor, 3µH, R5
1
SoKa
14
Q1
Mosfet Transisor, 4N65, TO-220F
1
ST
15
PCB1
PCB, L*W*T = 48.5х29х1.6mm, Cem-1, Rev:A
1
Jintong
16
F1
Fusible, 1A/250V
1
TY-OHM
17
R1
Carbon Resistor, 22Ω, 0805, 5%
1
TY-OHM
18
R2
Carbon Resistor, 750kΩ, 1W, 5%
1
TY-OHM
19
R3
Chip Resistor, 100Ω, 0805, 5%
1
TY-OHM
20
R4
Chip Resistor, 4.7Ω, 0805, 5%
1
TY-OHM
21
R5
Chip Resistor, 53.6kΩ, 0805, 1%
1
TY-OHM
22
R6
Chip Resistor, 9.95kΩ, 0805, 1%
1
TY-OHM
23
R7,R8
Chip Resistor, 1MΩ, 0805, 5%
2
TY-OHM
24
R9
Chip Resistor, 0.953Ω,1W, 1%
1
TY-OHM
25
R10,R12
Chip Resistor, 1.5KΩ, 0805, 5%
2
TY-OHM
26
Rgate
Chip Resistor, 22kΩ, 0805, 5%
1
TY-OHM
27
R14
Chip Resistor, 3.3kΩ, 0805, 5%
1
TY-OHM
28
R15
Chip Resistor, 10.7kΩ, 0805, 1%
1
TY-OHM
29
R16
Chip Resistor, 10.5kΩ, 0805, 1%
1
TY-OHM
30
T1
Transformer, LP = 0.68mH, EE19
1
31
CY1
Y capacitance, 1000pF/400V,Y1
1
SEC
32
U2
Opto-coupler, PC817C CTR = 200
1
Sharp
33
U3
Voltage Regulator, TL431A, VREF = 2.5V
1
ST
Innovative PowerTM
ActiveQRTM is a trademark of Active-Semi.
-4-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
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