ACTIVE-SEMI ACT337SH-T High performance activepsrâ ¢ primary switching regulator Datasheet

ACT337
®
Product Brief, 15-Apr-11
High Performance ActivePSRTM Primary Switching Regulator
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 ACT337 achieves excellent
regulation and transient response, yet requires less
than 30mW of standby power.
FEATURES
• Ultra Low Standby Power < 30mW
• Patented Primary Side Regulation
Technology
• Suitable Operation Frequency up to 85kHZ
• Proprietary Fast Startup Circuit
• Integrated Line and Primary Inductance
Compensation
• Integrated Programmable Output Cord
Resistance Compensation
The ACT337 is optimized for compact size 7W to
12W charger applications. It is available in spacesaving 8 pin SOP-8 package.
• Line Under-Voltage, Output Over-Voltage,
Output Short-Circuit and Over-Temperature
Protection
Figure 1:
• Complies with all Global Energy Efficiency
Simplified Application Circuit
and CEC Average Efficiency Standards
• Adjustable Power from 7W to 12W
• Minimum External Components
• SOP-8 Package
APPLICATIONS
• RCC Adapter Replacements
• Linear Adapter Replacements
• Standby and Auxiliary Supplies
GENERAL DESCRIPTION
The ACT337 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 ACT337 meets all of the global energy
efficiency regulations (CEC, European Blue Angel,
and US Energy Star standards) while using very
few external components.
The ACT337 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.
The ACT337 ActivePSRTM is optimized for high
performance, cost-sensitive applications, and
Innovative PowerTM
ActivePSRTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACT337
®
Product Brief, 15-Apr-11
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
PACKAGE
PINS
PACKING
METHOD
TOP MARK
ACT337SH-T
-40°C to 85°C
SOP-8
8
TAPE & REEL
ACT337SH
PIN CONFIGURATION
ACT337SH
SOP-8
ACT337SH
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
SW
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.
2,4,7
G
Ground(2,4 and 7 pin must be connected together).
8
BD
Base Drive. Base driver for the external NPN transistor.
6
VDD
Power Supply. This pin provides bias power for the IC during startup and steady state
operation.
5
FB
Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding.
3
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.
SOP-8
Innovative PowerTM
-2-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACT337
®
Product Brief, 15-Apr-11
Figure 6:
Universal VAC Input, 5V/2.1A Output Charger
Table 1:ACT337 Bill of Materials
Item
Reference
1
C1, C2
2
Description
QTY
Capacitor, Electrolytic, 10µF/400V, 10×16mm (Low leakage current)
2
C3
Capacitor, Ceramic,220pF/500V,1206,SMD
1
3
C4
Capacitor, Ceramic, 10µF/35V,1206,SMD
1
4
C5
Capacitor, Electrolytic, 1000µF/6.3V, 8 ×16mm
1
5
C6
Capacitor, Electrolytic, 820µF/6.3V, 6.3 × 16mm
1
6
C9
Capacitor, Ceramic,1000pF/50V,0805,SMD
1
7
CY1
Safety Y1,Capacitor,1000pF/400V,Dip
1
8
BD1
Bridge Rectifier,D1010S,1000V/1.0A,SDIP
1
9
D5
Fast Recovery Rectifier, RS1M,1000V/1.0A, RMA
1
10
D6
Fast Recovery Rectifier,RS1D,200V/1.0A,SMA
1
11
D8
Diode, Schottky, 45V/10A, S10U45S, SMD
1
12
L1
Choke Coil, 1.5mH, ¢6x8mm, DIP
1
13
Q1
Transistor, NPN, 700V,D13005,TO-126
1
14
F1
Fuse:1A 250V 3.6*10mm With Pigtail, ceramic tube
1
15
R1
Chip Resistor, 22Ω, 0805, 5%
1
16
R2
Chip Resistor, 1M,1206, 5%
1
17
R3
Chip Resistor, 390Ω,1206, 5%
1
18
R4
Chip Resistor, 15Ω, 0805, 5%
1
19
R5
Chip Resistor, 80.6k,0805, 1%
1
20
R6
Chip Resistor,18.2k,0805, 1%
1
21
R7
Chip Resistor, 30MΩ, 1206, 5%
1
22
R9
Chip Resistor, 0.62Ω,1206, 1%
1
23
R10
Chip Resistor, 162k,0805, 5%
1
24
R11
Chip Resistor, 3k, 0805, 5%
1
25
R13
Chip Resistor, 10Ω, 0805, 5%
1
26
T1
Transformer, LP = 1.25mH±7%, EPC17
1
27
U1
IC, ACT337SH-T,SOP-8
1
Innovative Power
TM
-3-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
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