OB2532

On-Bright Confidential to Lycon
©On-Bright Electronics
Confidential
-4-
Datasheet OB_DOC_DS_2532A0
OB2532
High Precision CC/CV Primary-Side PWM Controller
ELECTRICAL CHARACTERISTICS
l Pin Num tia 1
2 3
Pin Name GND GATE
CS
en 4
INV
fid 5
COMP
On-Bright Con 6
VDD
I/O Description
P Ground
O Totem-pole gate drive output for power MOSFET.
I
Current sense input. Connected to MOSFET current sensing resistor node.
n Proprietary Constant Voltage (CV) and Constant
Current (CC) control is integrated as shown in the
o figure below.
In CC control, the current and output power setting
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Datasheet OB_DOC_DS_2532A0
Marking Information
OB2532
High Precision CC/CV Primary-Side PWM Controller
to Lycon TERMINAL ASSIGNMENTS
50 17
Kohm ms
Frequency Section
fid Freq_MaxNote 1 IC Maximum frequency
55 60 65 KHz
n Freq_Nom
System Nominal switch frequency
50
KHz
o Freq_startup
INV=0V, Comp=5V
13.5 14.8 16.0 V
L VDD_clamp to OVP
Maximum VDD operation voltage IDD=10mA
Over voltage protection Threshold
Ramp VDD until gate shut down
27 28.5 30 V 26 27.5 29 V
I Loop Compensation for CV Stability
P Power Supply
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Datasheet OB_DOC_DS_2532A0
BLOCK DIAGRAM
OB2532
High Precision CC/CV Primary-Side PWM Controller
Primary-side Sensing and Regulation Without TL431 and Opto-coupler
Programmable CV and CC Regulation Adjustable Constant Current and Output
Power Setting Built-in Secondary Constant Current Control
OB2532
High Precision CC/CV Primary-Side PWM Controller
Product Specification
GENERAL DESCRIPTION
FEATURES
OB2532 is a high performance offline PWM ±5% Constant Voltage Regulation at
The voltage feedback from auxiliary winding. Connected to resistor
I divider from auxiliary winding reflecting output voltage. PWM duty cycle
is determined by EA output and current sense signal at pin 3.
o OB2532 is offered in SOT23-6 package.
t C Fig.1. Typical CC/CV Curve On-Brigh TYPICAL APPLICATION
©On-Bright Electronics
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Datasheet OB_DOC_DS_2532A0
(TA = 25℃, VDD=16V, if not otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage (VDD) Section
I DD ST
on I DD op
Standby Current Operation Current
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.
l Current Sense Input Section
TLEB
LEB time
625
ns
tia Vth_oc
Over current threshold
880 910 940 mV
Td_oc
OCP Propagation delay
110
ns
n ZSENSE_IN e T_ss
Input Impedance Soft start time
Max Operating Junction Temperature TJ
150 oC
Min/Max Storage Temperature Tstg Lead Temperature (Soldering, 10secs)
-55 to 150 oC 260 oC
Note: Stresses beyond those listed under “absolute maximum
controller for low power AC/DC charger and
Universal AC input
adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated.
14
KHz
△ f/Freq
Frequency shuffling range
with Primary Side Feedback Built-in Adaptive Current Peak Regulation Built-in Primary winding inductance
compensation Programmable Cable drop Compensation Power on Soft-start Built-in Leading Edge Blanking (LEB) Cycle-by-Cycle Current Limiting VDD Under Voltage Lockout with Hysteresis
Package
RθJA (℃/W)
SOT23-6
200
.
tial to Lycon Ordering Information
Part Number
Description
On-Bright Confiden OB2532MP
SOT23-6, Pb-free, T&R
Absolute Maximum Ratings
c can be adjusted externally by the sense resistor
Rs at CS pin. In CV control, multi-mode operations
y are utilized to achieve high performance and high L efficiency. In addition, good load regulation is
l OB2532 offers power on soft start control and
protection coverage with auto-recovery features
tia including Cycle-by-Cycle current limiting, VDD
OVP, VDD clamp and UVLO. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.