ACT412 - Active-Semi

ACT412
Product Brief, 10-Mar-14
ActivePSRTM Quasi-Resonant PWM Controller
FEATURES
mode including cycle-by-cycle current limiting.
• Patented Primary Side Regulation
ACT412 is to achieve no overshoot and very short
rise time even with big capacitive load (10000µF)
with the built-in fast and soft start process, .
Technology
• Quasi-Resonant Operation
The Quasi-Resonant (QR) operation mode can
effectively improve efficiency, reduce the EMI noise
and further reduce the components in input filter.
• Adjustable up to 120kHz Switching
Frequency
• +/-5% Output Voltage Regulation
• Constant Power Operation Mode for Fast
ACT412 is idea for application up to 36 Watt.
Figure 1:
Start-up and Motor Drive Applications
Simplified Application Circuit
• Integrated Line and Primary Inductance
Compensation
• Built-in Soft-Start Circuit
• Line Under-Voltage, Thermal, Output Overvoltage, Output Short Protections
•
•
•
•
Current Sense Resistor Short Protection
Transformer Short Winding Protection
Less than 100mW Standby Power
Complies with Global Energy Efficiency and
CEC Average Efficiency Standards
• Tiny SOT23-6 Packages
APPLICATIONS
• AC/DC Adaptors/Chargers for E-Shaver,
Motor Driver, ADSL, Network Power, Cell
Phone
• Big Capacitive Load Application
GENERAL DESCRIPTION
The ACT412 is a high performance peak current
mode PWM controller which applies ActivePSRTM
and ActiveQRTM technology. ACT412 achieves
accurate voltage regulation without the need of an
opto-coupler or reference device.
The ACT412 is designed to achieve less than
100mW Standby Power. By applying frequency fold
back and
ActiveQRTM technology, ACT412
exceeds the latest ES2.0 efficiency standard.
ACT412 integrates comprehensive protection. In
case of over temperature, over voltage, short
winding, short current sense resistor, open loop
and overload conditions, it would enter auto restart
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
ACT412
Product Brief, 10-Mar-14
ORDERING INFORMATION
PART NUMBER
TEMPERATURE
RANGE
PACKAGE
PINS
PACKING
METHOD
ACT412US-T
-40°C to 85°C
SOT23-6
6
TUBE & REEL
TOP MARK
FRYS
PIN CONFIGURATION
SOT23-6
ACT412US
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
CS
2
GND
Ground.
3
GATE
Gate Drive. Gate driver for the external MOSFET transistor.
4
VDD
5
FB
6
COMP
Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak
current limit for the primary switch.
Power Supply. This pin provides bias power for the IC during startup and steady state operation.
Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding.
Compensation Pin.
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-2-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
ACT412
Product Brief, 10-Mar-14
Figure 2:
ACT412, Universal VAC Input, 12V/400mA Output Charger
V-I Characteristic vs. VIN (25˚C)
16
High Limit
115V
12
Low Limit
10
V
90
Output Voltage (V)
14
230V
8
264V
6
4
2
0
0
300
600
900
1200
1400
Output Current (mA)
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-3-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
ACT412
Product Brief, 10-Mar-14
Table 2:
ACT412 Bill of Materials
ITEM
REFERENCE
1
U1
QTY
MANUFACTURER
IC, ACT412,SOT23-6
2
DESCRIPTION
1
Active-Semi.
C1,C2
Capacitor, Electrolytic, 6.8µF/400V, 10x12mm
2
KSC
3
C3
Capacitor, Ceramic, 1000pF/500V, 0805,SMD
1
POE
4
C4
Capacitor, Electrolytic,4.7µF/35V,5x11mm
1
KSC
5
C5,C6
Capacitor, Electrolytic, 330µF/16V, 8x11.5mm
2
KSC
6
C8
Capacitor, Ceramic, 0.1µF/25V, 0805,SMD
1
POE
7
C9
Capacitor, Ceramic, 1000pF/100V, 0805,SMD
1
POE
8
C10
Capacitor, Ceramic, 200pF/50V, 0805,SMD
1
POE
9
CY1
Safety Y1,Capacitor,1000pF/400V,Dip
1
UXT
10
D1-D4
Diode,Rectifier,1000V/1A,1N4007, DO-41
4
Good-Ark
11
D5
Fast Recovery Rectifier, RS1M,1000V/1.0A, RMA
1
PANJIT
12
D6
Fast Recovery Rectifier,RS1D,200V/1.0A,SMA
1
PANJIT
13
D7
NC
14
D8
Diode, schottky, 100V/3A, SB3100, DO-47
1
Good-Ark
15
L1
Axial Inductor, 1.5mH, 5*7,Dip
1
SoKa
16
L2
Axial Inductor, 0.55*5T, 5*7,Dip
1
SoKa
17
Q1
Mosfet Transistor, 4N60,TO-220
1
Infineon
18
PCB1
PCB, L*W*T=52.2x30x1.6mm,Cem-1,Rev:A
1
Jintong
19
FR1
Fuse,1A/250V
1
TY-OHM
20
R1
Chip Resistor, 51Ω, 0805, 5%
1
TY-OHM
TY-OHM
21
R2
Chip Resistor, 510KΩ, 1206, 5%
1
22
R3
Chip Resistor, 100Ω, 0805, 5%
1
TY-OHM
23
R4,R13
Chip Resistor, 22Ω, 0805, 5%
2
TY-OHM
24
R5
Chip Resistor, 45.3KΩ, 0805,1%
1
TY-OHM
25
R6
Chip Resistor, 6.9KΩ, 0805, 1%
1
TY-OHM
26
R7,R8
Chip Resistor, 1.5MΩ, 0805 , 5%
2
TY-OHM
27
R9
Chip Resistor, 0.75Ω, 1206,1%
1
TY-OHM
28
R11
Chip Resistor, 6.8KΩ, 0805, 5%
1
TY-OHM
29
R12
Chip Resistor, 3KΩ, 0805 , 5%
1
TY-OHM
30
R14
Chip Resistor, 390Ω, 0805 , 5%
1
TY-OHM
31
R15
Chip Resistor, 100KΩ, 0805 , 5%
1
TY-OHM
32
T1
Transformer, Lp=0.5mH, EE16
1
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-4-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.