RS2122A [PTC]
High Precision CC/CV PSR PWM Switch;
| 型号： | RS2122A |
| 厂家： | 
PRINCETON TECHNOLOGY CORP |
| 描述： | High Precision CC/CV PSR PWM Switch |
| 文件： | 总4页 (文件大小：146K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RS2122A
High Precision CC/CV PSR PWM Switch
DESCRIPTION
FEATURES
RS2122A is a high performance offline PSR controller
for low power AC/DC charger and adapter
applications. It operates in primary-side sensing and
regulation, so opto-coupler and TL431 could be
eliminated. In CC control, the current and output
power setting can be adjusted externally by the sense
resistor RS at CS pin. In CV control, PFM operations
are utilized to achieve high performance and high
efficiency. In addition, good load regulation is
achieved by the built-in cable drop compensation.
The chip consumes very low operation current (typical
650μA), it can achieve less than 30mW standby
power to meet strict standby power standard.
RS2122A offers comprehensive protection coverage
with auto-recovery features including Cycle-by-Cycle
current limiting, VDD over voltage protection,
feedback loop open protection, CS open protection,
Output short circuit protection, built-in leading edge
blanking, VDD under voltage lockout (UVLO), Over
temperature protection, etc. RS2122A is offered in
SOP-7L package.
Low startup current
±4% CC and ±5% CV Precision
Primary-side Sensing and Regulation Without TL431
and Opto-coupler
High precision constant voltage and current regulation
at universal AC input
Programmable CV and CC Regulation
Built-in Primary winding inductance compensation
Programmable Cable Drop Compensation
Built-in Feedback Loop Open Protection
Built-in CS Open Protection
VDD Over Voltage Protection
Built-in Output Short Circuit Protection
Built-in Leading Edge Blanking (LEB)
Over temperature protection(OTP)
Cycle-by-Cycle Current Limiting
VDD Under Voltage Lockout with Hysteresis (UVLO)
SOP-7L green Packaging
APPLICATIONS
Switching AC/DC Small Power Adaptor
Cell Phone or Digital Cameras Charger
Auxiliary Power for PC, TV etc
Linear Regulator/RCC Replacement
BLOCK DIAGRAM
LD
S
R
BJT Base
Driver
Q
VDD
POR
CS Floating
Protection
LOGIC
Output OVP
Soft Start
VDD OVP
CS
LEB
0.5V
PWM Model
PFM Model
CV Control
CC Control
DEM
Output Short
Protection
2V
FB Short
Protection
Drop comp
Compensation
Network
Sample
GND
FB
Tel: 886-2-66296288‧Fax: 886-2-29174598‧http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan
RS2122A
APPLICATION CIRCUIT
VDD
FB
GND
1
2
3
4
7
RS2122A
FB
LD
LD
6
5
AC
CS
V1.0
2
September 2016
RS2122A
ORDER INFORMATION
Device
Device Code
Y is package & Pin Assignments designator :
S : SOP7
RS2122A Y
PIN CONFIGURATION
SOP-7
1
7
VDD
GND
2
FB
3
6
FB
LD
4
5
CS
LD
PIN DESCRIPTION
Pin Name
Description
Pin No
VDD
FB
Supply voltage pin.
1
2, 3
4
Voltage feedback pin.
CS
Current sense pin, a resistor connects to sense the NPN current.
NPN collect
LD
5, 6
7
GND
Supply voltage pin. GND Pin.
V1.0
3
September 2016
RS2122A
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and to discontinue any product without notice at any time.
PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No
circuit patent licenses are implied.
Princeton Technology Corp.
2F, 233-1, Baociao Road,
Sindian Dist., New Taipei City 23145, Taiwan
Tel: 886-2-66296288
Fax: 886-2-29174598
http://www.princeton.com.tw
V1.0
10
September 2016
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