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OB2223F Datasheet
High Precision Low Cost MCM Power Switch

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OB2223F
High Precision Low Cost MCM Power Switch
GENERAL DESCRIPTION
OB2223F is a high performance, high precision
and low cost PWM Power switch for non-isolated
buck and flyback application. It combines a
dedicated current mode PWM controller (with a
high voltage power MOSFET with SOP8/DIP7
package) and built-in error amplifier optimized for
good overshoot and dynamic response for low
cost and component count. With precise inner
resistor divider, precise reference of EA
accurate constant voltage regulation 12V at
universal AC input can be guaranteed. For high
efficiency, oscillator with frequency-reduction and
burst mode control is implemented. And EMI
performance is achieved with On-Bright
proprietary frequency shuffling technique and soft
gate driver design.
OB2223F offers power on soft start control and
protection coverage with auto-recovery features
including Cycle-by-Cycle current limiting, Over
Loading Protection, Output Short-Circuit
Protection, On-Chip OTP,VDD OVP, and UVLO.
TYPICAL APPLICATION
FEATURES
Low cost and component count buck
application
Current Mode Control
Multiple mode control with good dynamic
response
Oscillator of fixed maximum switching
frequency with frequency-reduction and burst
mode control for high efficiency
Frequency shuffling for EMI improvement
Power on Soft-start
Built-in Leading Edge Blanking (LEB)
Cycle-by-Cycle Current Limiting
Over Loading Protection
Output Short-Circuit Protection
VDD Under Voltage Lockout with Hysteresis
(UVLO)
VDD OVP
On-Chip OTP
APPLICATIONS
Low Power AC/DC offline SMPS for
Electrical Appliance
Linear Regulator/RCC Replacement
OB2223F is offered in SOP8/DIP7 package.
AC IN
OB2223F
1 VDD
GND 8
2 COMP GND* 7
3 ENB DRAIN 6
4 CS
DRAIN 5
Note : GND* Only in SOP8 package
©On-Bright Electronics
Confidential
-1-
DC
OUT
Preliminary Datasheet
OB_DOC_DS_2223F00


OB2223F Datasheet
High Precision Low Cost MCM Power Switch

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OB2223F
High Precision Low Cost MCM Power Switch
GENERAL INFORMATION
Pin Configuration
The pin map is shown as below for SOP8/DIP7
VDD 1
8 GND
COMP 2
ENB
3
SOP
7
6
GND
DRAIN
CS 4
5 DRAIN
VDD 1
7 GND
COMP 2
ENB
3
DIP
6 DRAIN
CS 4
5 DRAIN
Ordering Information
Part Number
Description
OB2223FCP
SOP8, Pb-free, Tube
OB2223FCPA
SOP8, Pb-free, T&R
OB2223FAP
DIP7, Pb-free, Tube
Package Dissipation Rating
Package
RθJA (/W)
SOP8
90
DIP7
75
Note: Drain Pin Connected 100mm2 PCB copper
clad.
Absolute Maximum Ratings
Parameter
Value
Drain Voltage (off state)
-0.3V to Bvdss
VDD Voltage
-0.3 to 40V
VDD Zener Clamp
Continuous Current
10 mA
COMP Voltage
-0.3 to 7V
CS Input Voltage
-0.3 to 7V
ENB Voltage
-0.3 to 7V
Min/Max Operating
Junction Temperature TJ
Min/Max Storage
Temperature Tstg
Lead Temperature
(Soldering, 10secs)
-40 to 150
-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.
©On-Bright Electronics
Confidential
-2-
Preliminary Datasheet
OB_DOC_DS_2223F00


OB2223F Datasheet
High Precision Low Cost MCM Power Switch

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OB2223F pdf
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Marking Information
OB2223F
High Precision Low Cost MCM Power Switch
TERMINAL ASSIGNMENTS
Pin Num
1
2
3
4
5/6
7
8
Pin Name
VDD
COMP
ENB
CS
DRAIN
GND
GND
I/O Description
P Power Supply and Output Voltage Feedback
I Compensation Pin. Connect a Cap to GND
I Connected to GND for 12V output
I Current sense input
O
HV MOSFET Drain Pin. The Drain pin is connected to the primary lead
of the transformer / inductance.
P Ground
P Ground (Only in SOP8 package)
©On-Bright Electronics
Confidential
-3-
Preliminary Datasheet
OB_DOC_DS_2223F00


OB2223F Datasheet
High Precision Low Cost MCM Power Switch

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BLOCK DIAGRAM
OVP
OB2223F
High Precision Low Cost MCM Power Switch
Note: GND* only in SOP8 package
©On-Bright Electronics
Confidential
-4-
Preliminary Datasheet
OB_DOC_DS_2223F00


OB2223F Datasheet
High Precision Low Cost MCM Power Switch

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OB2223F
High Precision Low Cost MCM Power Switch
ELECTRICAL CHARACTERISTICS
(TA = 25, VDD=16V, if not otherwise noted)
Symbol
Parameter
Test Conditions
Min
Supply Voltage (VDD) Section
I DD ST
Standby Current
VDD=UVLO(off) -1V
I DD op
Operation Current
Operation supply current
CS=0V, VDD=12V
-
Operation supply current
CS=0V, VDD=12V,
CL=0.5nF
UVLO(ON)
VDD Under Voltage Lockout
Enter
VDD falling
6.0
UVLO(OFF)
VDD Under Voltage Lockout
Exit
VDD rising
11.5
OVP
Over voltage protection Ramp VDD until gate
Threshold
shut down
23
Vpmos
Pull-up PMOS Active
CS=0V,Comp=3V
VDD Regulation
Voltage
In normal regulation, VDD
will be regulated to 12.5V
Ramp VDD until Comp
voltage lower than 2.5V
12.0
Current Sense Input Section
TLEB
LEB time
Vth_oc
Over current threshold
890
Td_oc
OCP Propagation delay
ZSENSE_IN
Input Impedance
Frequency Section
Freq_MaxNote 1 IC Maximum frequency
50
27
f/Freq
Frequency shuffling range
F_shuffling
Shuffling frequency
F_Burst
Burst Mode
Frequency
Switch
PWM Section
Dmax
Maximum Duty Cycle
Vref_green
Threshold enter green
mode
Vref_burst_H Threshold exit burst mode
Vref_burst_L Threshold enter burst mode
Error Amplifier section
Gain
DC gain of EA
Gm Trans-conductance of EA
Protection Section
Typ
3
0.9
1.2
7.0
12.5
25
10
12.5
200
925
100
30
+/-7
60
20
50
1.65
1.25
1.15
70
110
Max
10
1.5
1.7
8.0
13.5
27
13
960
33
Unit
uA
mA
mA
V
V
V
V
V
ns
mV
ns
Kohm
KHz
%
Hz
KHZ
%
V
V
V
dB
uS
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_2223F00


OB2223F datasheets pdf
Total : 11 Pages
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