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OB2273AP View Datasheet(PDF) - On-Bright Electronics

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Description
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OB2273AP
On-Bright
On-Bright Electronics  On-Bright
OB2273AP Datasheet PDF : 12 Pages
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OB2273
High Performance Current Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25, VDD=18V, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min
Supply Voltage (VDD)
VDD=UVLO(OFF)-
Istartup
VDD Start up Current
1V, measure leakage
current into VDD
I_VDD_Operation Operation Current
VDD=18V,VFB=3V,
CS=0V,Cgate=1nF
UVLO(ON)
VDD Under Voltage Lockout
Enter
8
UVLO(OFF)
VDD Under Voltage Lockout
Exit (Recovery)
14.3
Vpull-up
Pull-up PMOS active
Vdd_clamp
Ivdd=10mA
30
OVP(ON)
Over voltage
voltage
protection
CS=0V,FB=3V
Ramp up VDD until
26
gate clock is off
l Vlatch_release Latch release voltage
a Feedback Input Section(FB Pin)
VFB_Open
VFB Open Loop Voltage
3.9
ti Avcs
PWM input gain Δ VFB/ Δ
VCS
n Maximum duty Max duty cycle @
cycle
VDD=18V,VFB=3V,VCS=0V
75
de Vref_green
The threshold enter green
mode
Vref_burst_H
The threshold exit burst mode
fi Vref_burst_L
The threshold enter burst
mode
n IFB_Short
FB pin short circuit current
Short FB pin to GND
and measure current
Co VTH_PL
Power Limiting FB Threshold
Voltage
TD_PL
Power limiting Debounce
Time
t ZFB_IN
Input Impedance
Current Sense Input(CS Pin)
h SST
Soft start time
g T_blanking
Leading edge blanking time
ZSENSE_IN
Input Impedance
Bri TD_OC
Over Current Detection and
Control Delay
From Over Current
Occurs till the
Gatedrive output start
80
OnVTH_OC
Vocp_clamping
Internal Current Limiting
Threshold Voltage with zero
duty cycle
CS voltage clamper
to turn off
Oscillator
FOSC
Normal Oscillation Frequency
VDD=18V,
CS=0V
FB=3V, 60
f_OSC
Frequency jittering
F_shuffling
Shuffling frequency
Typ Max Unit
5
1.8
20 uA
2.5 mA
9
10 V
15.3 16.3 V
13
V
to32 34 V
28 30 V
5
V
4.2
V
2
V/V
80 85 %
2
V
1.275
V
1.175
V
0.4
mA
3.7
V
88 96 mSec
16
Kohm
4
ms
220
ns
40
Kohm
120
nSec
0.75
V
0.9
V
65 70 KHZ
+/-4
%
32
Hz
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_227305
 

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