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PDF OB2262 Datasheet ( Hoja de datos )

Número de pieza OB2262
Descripción Current Mode PWM Controller
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OB2262 datasheet

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OB2262 pdf
OB2262
Current Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25OC if not otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage (VDD)
I_VDD_Stup VDD Start up Current VDD =12.5V, RI=100K
3 20 uA
Measure Leakage current
into VDD
I_VDD_Ops Operation Current
VDD=16V,
1.4 mA
UVLO(ON)
VDD Under Voltage
RI=100Kohm, VFB=3V
7.8 8.8 9.8 V
Lockout Enter
www.DataSheetU4UV.cLoOm(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 blanking RI = 100 Kohm
300 ns
time
ZSENSE_IN
TD_OC
Input Impedance
Over Current Detection VDD = 16V,
and Control Delay
CS>VTH_OC, FB=3.3V
40
75
Kohm
nSec
VTH_OC
Over-Current
Threshold Voltage or
FB=3.3V, RI=100 Kohm 0.70 0.75 0.80 V
Equivalent maximum
input voltage at SENSE
Oscillator
FOSC
f_Temp
f_VDD
RI_range
V_RI_open
Fosc_BM
Normal Oscillation
Frequency
Frequency Temperature
Stability
Frequency Voltage
Stability
Operating RI Range
RI open load voltage
Burst Mode Base
Frequency
RI = 100 Kohm
VDD = 16V,
RI=100Kohm, TA -20oC
to 100 oC
VDD = 12-25V,
RI=100Kohm
VDD = 16V, RI =
100Kohm
60
50
65 70 KHZ
5%
5%
100 150 Kohm
2V
22 KHZ
©On-Bright Electronics
Confidential to Micro Bridge
- 5 - OB_DOC_DS_62B5

5 Page

OB2262 arduino
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.
OB2262
Current Mode PWM Controller
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.
www.DataSheet4U.com
©On-Bright Electronics
- 10 -
Confidential to Micro Bridge
OB_DOC_DS_62B5

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