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OB25134 Datasheet Preview

OB25134 Datasheet

High Precision CC/CV Primary-Side PWM Power Switch

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OB2513x
High Precision CC/CV Primary-Side PWM Power Switch
GENERAL DESCRIPTION
OB2513x is a high performance offline PSR power
switch for low power AC/DC charger and adapter
applications. It operates in primary-side sensing
and regulation. Consequently, opto-coupler and
TL431 could be eliminated. Proprietary Constant
Voltage (CV) and Constant Current (CC) control is
integrated as shown in the figure below.
In CC control, the current and output power setting
can be adjusted externally by the sense resistor
Rs at CS pin. In CV control, multi-mode operations
are utilized to achieve high performance and high
efficiency. In addition, good load regulation is
achieved by the built-in cable drop compensation.
Device operates in PFM in CC mode as well at
large load condition and it operates in PWM with
frequency reduction at light/medium load. The chip
consumes very low operation current, it can
achieve less than 75mW standby power.
OB2513x offers comprehensive protection
coverage with auto-recovery features including
Cycle-by-Cycle current limiting, VDD over voltage
protection, short circuit protection, built-in leading
edge blanking, VDD under voltage lockout (UVLO),
OTP etc.
OB2513x is offered in SOP7 package.
Figure.1. Typical CC/CV Curve
FEATURES
Primary-side sensing and regulation without
TL431 and opto-coupler
High precision constant voltage and current
regulation at universal AC input
Multi-mode PWM/PFM operation for efficiency
improving
Good dynamic response
Programmable CV and CC regulation
Built-in line voltage and primary winding
inductance compensation
Programmable cable drop compensation
No need for control loop compensation
Audio noise free operation
Internal BJT switch
Built-in leading edge blanking (LEB)
Comprehensive protection coverage with
auto-recovery
VDD over voltage protection
VDD under voltage lockout with
hysteresis (UVLO)
Cycle-by-cycle current limiting
Feedback loop open protection
Output short circuit protection
Over temperature protection (OTP)
APPLICATIONS
Low Power AC/DC offline SMPS for
Cell Phone Charger
Digital Cameras Charger
Small Power Adapter
Auxiliary Power for PC, TV etc.
Linear Regulator/RCC Replacement
TYPICAL APPLICATION
~ ++
AC
+
VDD GND
FB
NC C
CS C
RS OB2513x
VO
+ CO
NS
NP
NAUX
©On-Bright Electronics
Confidential
-1-
Datasheet
OB_DOC_DS_2513XA0




On-Bright Electronics

OB25134 Datasheet Preview

OB25134 Datasheet

High Precision CC/CV Primary-Side PWM Power Switch

No Preview Available !

OB2513x
High Precision CC/CV Primary-Side PWM Power Switch
GENERAL INFORMATION
Pin Configuration
Ordering Information
Part Number
Description
OB2513xJP
SOP7, Pb-free, Tube
OB2513xJPA
SOP7, Pb-free, T&R
Package Dissipation Rating
Package
RθJA (/W)
SOP7
95
Recommended Operating Condition
Symbol Parameter
Range
VDD
VDD Supply Voltage 5 to 16V
Absolute Maximum Ratings
Parameter
Value
OB2513x CB Voltage
800V
VDD Voltage
-0.3 to 20V
FB Input Voltage
-0.3 to 7V
CS Input Voltage
-0.3 to 7V
Min/Max Operating Junction
Temperature TJ
Operating
Ambient
Temperature TA
Min/Max Storage
Temperature Tstg
Lead Temperature
(Soldering, 10secs)
-40 to 150
-20 to 85
-55 to 150
260
Note: Stresses beyond those listed under “absolute maximum
ratings” may cause permanent damage to the device. These
are stress ratings only, functional operation of the device at
these or any other conditions beyond those indicated under
“recommended operating conditions” is not implied. Exposure
to absolute maximum-rated conditions for extended periods
may affect device reliability.
Recommended Output power Table
Product
AdapterNote1
90V~264V
OB25132
3.5W
OB25133
5.0W
OB25134
7.5W
Notes: 1. Maximum practical continuous power in an adapter
design with sufficient drain pattern as a heat sink, at 40
ambient
©On-Bright Electronics
Confidential
-2-
Datasheet
OB_DOC_DS_2513XA0


Part Number OB25134
Description High Precision CC/CV Primary-Side PWM Power Switch
Maker On-Bright Electronics
Total Page 11 Pages
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