ACTIVE-SEMI ACT364US-T High performance activepsrâ ¢ primary switching regulator Datasheet

ACT364
Active-Semi
Product Brief, 15-Apr-11
High Performance ActivePSRTM Primary Switching Regulator
FEATURES
few external components.
• Patented Primary Side Regulation
The ACT364 ensures safe operation with complete
protection against all fault conditions. Built-in
protection circuitry is provided for output shortcircuit, output over-voltage, line under-voltage, and
over temperature conditions.
Technology
• No Opto-Coupler
• Suitable Operation Frequency up to 85kHZ
• Best-in-Class Constant Voltage, Constant
The ACT364 ActivePSRTM is optimized for high
performance, cost-sensitive applications, and
utilizes Active-Semi’s proprietary primary-side
feedback architecture to provide accurate constant
voltage, constant current (CV/CC) regulation
without the need of an opto-coupler or reference
device. Integrated line and primary inductance
compensation circuitry provides accurate constant
current operation despite wide variations in line
voltage and primary inductance. Integrated output
cord resistance compensation further enhances
output accuracy. The ACT364 achieves excellent
regulation and transient response, yet requires less
than 150mW of standby power.
Current Accuracy
•
•
•
•
Low EMI
Proprietary Fast Startup Circuit
Built-in Soft-Start Circuit
Integrated Line and Primary Inductance
Compensation
• Integrated Programmable Output Cord
Resistance Compensation
• Line Under-Voltage, Output Over-Voltage,
Output Short-Circuit and Over-Temperature
Protection
The ACT364 is optimized for compact size 2W to
6.3W charger applications. It is available in spacesaving 6 pin SOT23-6 package.
• Complies with all Global Energy Efficiency
and CEC Average Efficiency Standards
• Adjustable Power from 2W to 6.3W
• Minimum External Components
• Tiny SOT23-6 Package
Figure 1:
Simplified Application Circuit
APPLICATIONS
• Chargers for Cell Phones, PDAs, MP3,
Portable Media Players, DSCs, and Other
Portable Devices and Appliances
• RCC Adapter Replacements
• Linear Adapter Replacements
• Standby and Auxiliary Supplies
GENERAL DESCRIPTION
The ACT364 belongs to the high performance
patented ActivePSRTM Family of Universal-input
AC/DC off-line controllers for battery charger and
adapter applications. It is designed for flyback
topology working in discontinuous conduction mode
(DCM). The ACT364 meets all of the global energy
efficiency regulations (CEC, European Blue Angel,
and US Energy Star standards) while using very
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACT364
Product Brief, 15-Apr-11
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
PACKAGE
PINS
PACKING
METHOD
TOP MARK
ACT364US-T
-40°C to 85°C
SOT23-6
6
TAPE & REEL
FSCS
PIN CONFIGURATION
1
G
2
BD
3
FSCR
FSCS
SW
6
CS
5
FB
4
VDD
SOT23-6
ACT364US-T
PIN DESCRIPTIONS
PIN
NAME
1
SW
2
G
3
BD
4
VDD
5
FB
Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding.
6
CS
Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak
current limit for the primary switch. The peak current limit is set by (0.396V × 0.9) / RCS. For more
detailed information, see Application Information.
Innovative PowerTM
DESCRIPTION
Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power
NPN’s emitter. This pin also supplies current to VDD during startup.
Ground.
Base Drive. Base driver for the external NPN transistor.
Power Supply. This pin provides bias power for the IC during startup and steady state operation.
-2-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACT364
Product Brief, 15-Apr-11
Figure 3:
Universal VAC Input, 5V/1A Output Charger
Table 1:
ACT364 Bill of Materials
ITEM
REFERENCE
1
U1
2
C1, C2
3
DESCRIPTION
QTY
MANUFACTURER
IC, ACT364US-T, SOT23-6
1
Active-Semi
Capacitor, Electrolytic, 4.7µF/400V, 8 × 12mm
2
KSC
C3
Capacitor, Ceramic,1000pF/500V,1206,SMD
1
POE
4
C4
Capacitor, Electrolytic, 4.7µF/35V, 5 × 11mm
1
KSC
5
C5
Capacitor, Electrolytic, 680µF/10V, 8 × 12mm
1
KSC
6
C9
Capacitor, Ceramic,1000pF/50V,0805,SMD
1
POE
7
BD1
Bridge,B6S,600V/0.5A,MDI,SMD
1
PANJIT
8
D5,D6
Diode, Ultra Fast, FR107,1000V/1.0A, DO-41
2
Good-Ark
9
D8
Diode, Schottky, 40V/3A, SB340, DO-15
1
Good-Ark
10
L1
Axial Inductor, 1.5mH, 0410, DIP
1
Amode Tech
11
Q1
Transistor, NPN, 700V,1.5A, D13003, TO-126
1
Huawei
12
FR1
Fusible Resistor, 1W, 10Ω, 5%
1
TY-OHM
13
R1,R4
Chip Resistor, 22Ω, 0805, 5%
2
TY-OHM
14
R2
Chip Resistor, 750k, 1206, 5%
1
TY-OHM
15
R3
Chip Resistor, 470Ω, 1206, 5%
1
TY-OHM
16
R5
Chip Resistor, 49.9k, 0805, 1%
1
TY-OHM
17
R6
Chip Resistor, 8.87k, 0805, 1%
1
TY-OHM
18
R7,R8
Chip Resistor, 5.1MΩ, 1206, 5%
2
TY-OHM
19
R9
Chip Resistor, 1.0Ω, 1206, 1%
1
TY-OHM
20
R10
Chip Resistor, 162k, 0805, 5%
1
TY-OHM
21
R11
Chip Resistor, 1.1k, 0805, 5%
1
TY-OHM
22
R13
Chip Resistor, 10Ω, 0805, 5%
1
TY-OHM
23
T1
Transformer, LP = 1.5mH±7%, EFD15
1
Innovative PowerTM
-3-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
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