PT2313E
CC/CV Primary-Side Green Mode Convertor
GENERAL DESCRIPTION
The PT2313E is a high performance
AC/DC power convertor for charger and
adaptor applications. Due to the PSR control,
the PT2313E can provide accurate constant
voltage
(CV)
and
constant
current
(CC)
regulation without opto-coupler and TL431.
The PT2313E adopts PFM method in CC
control mode and PFM/PWM method in CV
control mode. In order
performance,
The
to achieve high
PT2313E
uses
FEATURES
PSR without opto-coupler and TL431
5% CV and 5% CC regulation at universal
AC input
QR operation for high efficiency
Frequency shuffling technique for EMI
Built-in cable drop compensation
Built-in adaptive current peak regulation
Built-in primary side winding inductance
compensation
Built-in leading edge blanking (LEB)
Power on soft-start
Cycle-by-cycle current limiting
VCC OVP/UVLO, Output OVP
CS resistor open and short protection
Over temperature protection(OTP)
Auto-recovery after trigger protection
quasi-resonant (QR) switching to improve the
efficiency, frequency shuffling technique to
optimize EMI design and built-in cable drop
compensation to meet good load regulation.
The PT2313E utilizes soft start control and
multi-protection to meet high reliability, such
as cycle-by-cycle current limiting, output OVP,
VCC OVP/UVLO, sense resistor open/short
protection, OTP etc.
PT2313E is offered in SOP-7 package.
APPLICATIONS
Adapters/Chargers
LED Lighting
Auxiliary Power Supplies
ORDERING INFORMATION
PACKAGE
SOP-7
TEMPERATURE
RANGE
-40℃ to 85℃
ORDERING PART
NUMBER
PT2313EESOG
TRANSPORT
MEDIA
Tape and Reel
4000 units
MARKING
PT2313E
xxxxxX
CR POWTECH (SHANGHAI) CO., LTD.
PT2313E_DS_Rev EN1.2
WWW.CRPOWTECH.COM
Page 1
PT2313E
CC/CV Primary-Side Green Mode Convertor
TYPICAL APPLICATION CIRCUIT
5V
D2
C3
DB1
C1
R0
D1
R2
C4
R6
5V
T1
3
AC In
R1
VCC
FB
CRC
GND
R3
R4
C5
CS
4
DRAIN
5,6
FR1
D3
C2
2
R5
1
Figure1. Typical Application of PT2313E
PIN ASSIGNMENT
CRC 1
FB
2
7
GND
PT2313E
VCC 3
CS
4
6 DRAIN
5 DRAIN
SOP-7
Figure 2. Pin Configuration of PT2313E (Top View)
PIN DESCRIPTIONS
PIN No.
1
2
PIN NAMES
CRC
FB
stability regulation
Voltage feedback, The CV and CC regulation are realized based on the
voltage sampling of this pin
The power supply for the IC. In order to get the correct operation of the IC,
3
4
5,6
7
VCC
CS
DRAIN
GND
a capacitor with low ESR should be placed as close as possible to the
VCC pin
Primary Side Peak Current Detection Port
Open-drain of MOSFET
The ground of the IC
DESCRIPTION
This pin connects a capacitor (10nF is recommended) to GND for system
CR POWTECH (SHANGHAI) CO., LTD.
PT2313E_DS_Rev EN1.2
WWW.CRPOWTECH.COM
Page 2
PT2313E
CC/CV Primary-Side Green Mode Convertor
ABSOLUTE MAXIMUM RATINGS
SYM
V
CC
(Note1)
PARAMETER
Voltage at VCC to GND
Voltage at Drain to GND
Voltage at FB, CS, CRC to GND
VALUE
-0.3 to 28
0 to 650
-0.3 to 6
-40 to 150
-55 to 150
300
184
2000
UNIT
V
V
V
℃
℃
℃
℃/W
V
T
J
T
STG
T
LEAD
JA
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (Junction to Ambient)
ESD (Human Body Model)
Note 1:
Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent
damages to the device. Functional operation of the device at these or any other conditions beyond those
indicated under “Recommended Operating Conditions” is not implied. For maximum safe operating
conditions, refer to Electrical Characteristics.
SIMPLIFIED BLOCK DIAGRAM
VCC
DRAIN
Regulator
& UVLO
Supply
OVP
CRC
Compensation
OTP
REF1
FB
S/H
Comparator
Logic
DRV
REF
Comparator
FSW/Duty
GND
CS
Figure 3. Simplified Block Diagram of PT2313E
CR POWTECH (SHANGHAI) CO., LTD.
PT2313E_DS_Rev EN1.2
WWW.CRPOWTECH.COM
Page 3
PT2313E
CC/CV Primary-Side Green Mode Convertor
ELECTRICAL CHARACTERISTICS
(TA=25℃, VCC=20.5V，unless otherwise specified)
SYMBOL
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
Supply Voltage (VCC) Section
VCC
ON
VCC
OFF
VCC
OVP
VCC
clamp
ICC
ST
ICC
OP
ICC
FAULT
VFB
VFB
OVP
IFB
LEAK
Icable
Turn-on threshold
Turn-off threshold
Over voltage
protection threshold
Clamp voltage
Start-up current
Operation current
Protection current
VCC rising
VCC falling
Ramp VCC until gate shut
down
I
VCC
=10mA
Before turn on, VCC=18V
After VCC turn on
Fault conditions
500
18.5
7.7
23
26
20.5
8.2
24
27.5
22.5
8.7
25
29
1
1
V
V
V
V
μA
mA
μA
Feedback (FB) Section
Feedback Voltage
FB OVP
FB leakage current
Cable
current
compensation
40
42.5
Operation at CV mode
2.475
2.5
3
0.1
45
2.525
V
V
μA
μA
Current Sense (CS) Section
V
CS
T
LEB
F
MIN
△f/Freq
OTP Section
T_OTP
T_recovery
OTP temperature
Recovery temperature
160
120
℃
℃
CS current limit
LEB time
0.485
0.5
300
0.515
V
ns
Frequency Section
Minimum frequency
Frequency shuffling
range
No load
500
7
Hz
%
Power MOSFET Section
BV
DSS
R
DSON
Drain-Source
breakdown Voltage
On Resistance
Static, Id=2.0A
650
2.7
3.2
V
Ω
CR POWTECH (SHANGHAI) CO., LTD.
PT2313E_DS_Rev EN1.2
WWW.CRPOWTECH.COM
Page 4
PT2313E
CC/CV Primary-Side Green Mode Convertor
OPERATION DESCRIPTION
The PT2313E is a high performance AC/DC
power
controller
for
charger
and
adaptor
applications. Due to the PSR control, the
PT2313E can provide accurate constant voltage
(CV) and constant current (CC) regulation without
opto-coupler and TL431, as shown in Figure 4.
±
5%
±
5%
which always works in DCM mode at both
CC/CV control (Refer to Figure 1).
The controller works in PFM/PWM mode at CV
operation. And the output voltage of system can
be sensed via the divider of auxiliary winding.
During
primary
switch
turn-on
time,
the
secondary output diode is reversed, then the
load current is supplied from the output
capacitors. The current in the primary winding
ramps up. Until switch turns off, the primary
current transfers to the secondary side and the
output diode become conducting state. The
waveform of auxiliary voltage reflecting the
output voltage is shown in figure 5 and the
equation is given by
Vo
V
AUX
½
Io
Icc
Figure 4. Typical CC/CV Curve
N
AUX
Vo
Vd
N
S
(1)
Where Vd indicates the forward voltage on the
output diode, N
AUX
/N
s
is the turn ratio.
Start up Current and Start up Control
Sampling Instance
V
AUX
The VCC of PT2313E could be charged up
above UVLO threshold and starts up quickly
because of the very low startup current. A large
value startup resistor can therefore be used to
minimize the power loss in application. In
addition, soft-start is designed to assure the
reliability.
T
ON
T
Demag
Figure 5. Auxiliary voltage waveform
Operating Current
The FB pin will detect the output voltage through
the divider connected on the auxiliary winding,
the auxiliary voltage is sampled at the two thirds
of the de-magnetization time and will be hold
until the next sampling. The FB signal will be
compared with a internal reference (Vref) to get
an error signal, which is used for voltage loop
feedback at CV operation mode.
The operating current of PT2313E is about 1mA.
Good efficiency is achieved with the low
operating current together with „Muti-mode‟
control features. Also, it is very important for low
standby power design.
Constant Voltage Operation
The PT2313E is designed for flyback system,
CR POWTECH (SHANGHAI) CO., LTD.
PT2313E_DS_Rev EN1.2
WWW.CRPOWTECH.COM
Page 5
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