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PDF OB2223F Data sheet ( Hoja de datos )
| Número de pieza | OB2223F | |
| Descripción | High Precision Low Cost MCM Power Switch | |
| Fabricantes | On-Bright Electronics | |
| Logotipo |  |
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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
1 page  
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
5 Page 
OB2223F
High Precision Low Cost MCM Power Switch
IMPORTANT NOTICE
RIGHT TO MAKE CHANGES
On-Bright Electronics Corp. reserves the right to make corrections, modifications, enhancements,
improvements and other changes to its products and services at any time and to discontinue any product
or service without notice. Customers should obtain the latest relevant information before placing orders
and should verify that such information is current and complete.
WARRANTY INFORMATION
On-Bright Electronics Corp. warrants performance of its hardware products to the specifications
applicable at the time of sale in accordance with its standard warranty. Testing and other quality control
techniques are used to the extent it deems necessary to support this warranty. Except where mandated
by government requirements, testing of all parameters of each product is not necessarily performed.
On-Bright Electronics Corp. assumes no liability for application assistance or customer product design.
Customers are responsible for their products and applications using On-Bright’s components, data sheet
and application notes. To minimize the risks associated with customer products and applications,
customers should provide adequate design and operating safeguards.
LIFE SUPPORT
On-Bright Electronics Corp.’s products are not designed to be used as components in devices intended to
support or sustain human life. On-bright Electronics Corp. will not be held liable for any damages or
claims resulting from the use of its products in medical applications.
MILITARY
On-Bright Electronics Corp.’s products are not designed for use in military applications. On-Bright
Electronics Corp. will not be held liable for any damages or claims resulting from the use of its products in
military applications.
©On-Bright Electronics
Confidential
- 11 -
Preliminary Datasheet
OB_DOC_DS_2223F00
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet OB2223F.PDF ] | |
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