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OB2273MP Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers

Part # OB2273MP
Description  High Performance Current Mode PWM Controller
PDF  10 Pages
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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OB2273MP Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers

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OB2273
High Performance Current Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25℃, VDD=16V, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
Supply Voltage (VDD)
Istartup
VDD Start up Current
VDD=UVLO(OFF)-
1V, measure leakage
current into VDD
5
20
uA
I_VDD_Operation Operation Current
VFB=3V
1.8
2.5
mA
UVLO(ON)
VDD Under Voltage Lockout
Enter
6
7
8
V
UVLO(OFF)
VDD Under Voltage Lockout
Exit (Recovery)
12.5 13.5
14.5 V
Vpull-up
Pull-up PMOS active
13
V
Vdd_clamp
Ivdd=10mA
30
32
34
V
OVP(ON)
Over
voltage
protection
voltage
CS=0.3V,FB=3V
Ramp up VDD until
gate clock is off
24
26
28
V
Vlatch_release
Latch release voltage
5
V
Feedback Input Section(FB Pin)
VFB_Open
VFB Open Loop Voltage
3.9
4.2
V
Avcs
PWM input gain Δ VFB/ Δ
VCS
2
V/V
Maximum
duty
cycle
Max
duty
cycle
@
VDD=14V,VFB=3V,VCS=0.3V
75
80
85
%
Vref_green
The threshold enter green
mode
1.4
V
Vref_burst_H
The threshold exit burst mode
0.675
V
Vref_burst_L
The threshold enter burst
mode
0.575
V
IFB_Short
FB pin short circuit current
Short FB pin to GND
and measure current
0.4
mA
VTH_PL
Power Limiting FB Threshold
Voltage
3.7
V
TD_PL
Power
limiting
Debounce
Time
80
88
96
mSec
ZFB_IN
Input Impedance
16
Kohm
Current Sense Input(CS Pin)
SST
Soft start time
4
ms
T_blanking
Leading edge blanking time
220
ns
ZSENSE_IN
Input Impedance
40
Kohm
TD_OC
Over Current Detection and
Control Delay
From Over Current
Occurs
till
the
Gatedrive output start
to turn off
120
nSec
VTH_OC
Internal
Current
Limiting
Threshold Voltage with zero
duty cycle
0.75
V
Vocp_clamping
CS voltage clamper
0.9
V
Oscillator
FOSC
Normal Oscillation Frequency
VDD=14V,
FB=3V,
CS=0.3V
60
65
70
KHZ
△
f_OSC
Frequency jittering
+/-4
%
F_shuffling
Shuffling frequency
32
Hz
△
f_Temp
Frequency
Temperature
1
%
©On-Bright Electronics
Confidential
Preliminary Datasheet
OB_DOC_DS_227302
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