DataSheet.es OB2263 Hoja de datos PDF


PDF OB2263 Datasheet ( Hoja de datos )

Número de pieza OB2263
Descripción Current Mode PWM Controller
Fabricantes On-Bright 
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OB2263 datasheet

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OB2263 pdf
OB2263
www.DataSheet4U.com
Current Mode PWM ControllerFrequency Shuffling
ELECTRICAL CHARACTERISTICS
(TA = 25OC if not otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage (VDD)
I_VDD_Startup VDD Start up
VDD =12.5V, RI=100K
3 20 uA
Current
Measure Leakage current
into VDD
I_VDD_Ops
Operation Current
VDD=16V,
1.4 mA
UVLO(ON)
RI=100Kohm, VFB=3V
VDD Under Voltage
7.8 8.8 9.8 V
Lockout Enter
UVLO(OFF)
VDD Under Voltage
13 14 15 V
Lockout Exit
(Recovery)
VDD_Clamp
VDD Zener Clamp
Voltage
IVDD = 5 mA
34 V
Feedback Input Section(FB Pin)
AVCS
PWM Input Gain
VFB_Open
VFB Open Loop
Voltage
IFB_Short
FB pin short circuit
current
VTH_0D
Zero Duty Cycle FB
Threshold Voltage
VTH_PL
Power Limiting FB
Threshold Voltage
TD_PL
Power limiting
Debounce Time
ZFB_IN
Input Impedance
DC_MAX
Maximum Duty
Cycle
ΔVFB /ΔVcs
Short FB pin to GND and
measure current
VDD = 16V,
RI=100Kohm
VDD=18V,
RI=100Kohm, FB=3V,
CS=0
2.0 V/V
4.8 V
1.2 mA
0.75 V
3.7 V
35 mSec
6 Kohm
75 %
Current Sense Input(Sense Pin)
T_blanking
Leading edge
RI = 100 Kohm
300 ns
blanking time
ZSENSE_IN
TD_OC
Input Impedance
Over Current
Detection and
Control Delay
VDD = 16V,
CS>VTH_OC, FB=3.3V
40
75
Kohm
nSec
VTH_OC
Over Current
FB=3.3V, RI=100 Kohm 0.70 0.75 0.80 V
Threshold Voltage at
zero Duty Cycle
Oscillator
FOSC
Normal Oscillation
Frequency
RI = 100 Kohm
60 65 70 KHZ
f_Temp
f_VDD
RI_range
V_RI_open
Frequency
Temperature Stability
Frequency Voltage
Stability
Operating RI Range
RI open load voltage
VDD = 16V,
RI=100Kohm, TA -20oC
to 100 oC
VDD = 12-25V,
RI=100Kohm
50
5%
5%
100 150 Kohm
2V
©On-Bright Electronics
Confidential to Micro Bridge
- 5 - OB_DOC_DS_63B5

5 Page

OB2263 arduino
OB2263
www.DataSheet4U.com
Current Mode PWM ControllerFrequency Shuffling
Protection Controls
Good power supply system reliability is achieved
with its rich protection features including Cycle-by-
Cycle current limiting (OCP), Over Load
Protection (OLP) and over voltage clamp, Under
Voltage Lockout on VDD (UVLO).
With On-Bright Proprietary technology, the OCP
threshold tracks PWM Duty cycles and is line
voltage compensated to achieve constant output
power limit over the universal input voltage range
with recommended reference design.
At overload condition when FB input voltage
exceeds power limit threshold value for more than
TD_PL, control circuit reacts to shut down the
output power MOSFET. Device restarts when VDD
voltage drops below UVLO limit.
VDD is supplied by transformer auxiliary winding
output. It is clamped when VDD is higher than
threshold value. The power MOSFET is shut down
when VDD drops below UVLO limit and device
enters power on start-up sequence thereafter.
©On-Bright Electronics
- 10 -
Confidential to Micro Bridge
OB_DOC_DS_63B5

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