SMD Type
Current Mode PWM Controller
OB2263
■ Electrical Characteristics Ta = 25℃
Parameter
Turn on threshold Voltage
Turn-off threshold Voltage
Start up current
Operation Current
VCC Zener Clamp
VFB Open Loop Voltage
PWM input gain ΔVfb/ΔVcs
FB Pin Short Current
Zero Duty Cycle FB Threshold Voltage
Power limiting FB Threshold
Power limiting Debounce
Input Impedance
Maximum duty cycle
Leading edge Blanking Time
Input impedance
OCP control delay
OCP threshold
Normal Oscillation Frequency
Burst Mode Base Frequency
Frequency variation versus temp.
Deviation
Frequency variation versus VCC
Frequency Jittering
Shuffling Frequency
Output voltage Low
Output High Level
Output clamp voltage
Rising time
Falling time
Symbol
UVLO_ON
UVLO_OFF
I_VCC_ST
I_VCC_OP
VCC_Clamp
VFB_Open
Avcs
IFB_Short
VTH_0D
VTH_PL
TD_PL
ZFB_IN
Max_Duty
TLEB
ZCS
TD_OC
VTH_OC
Fosc
Fosc_BM
Test Conditions
VDD =12.5V
VDD=16V, VFB=3V
IVCC= 5 mA
ΔVFB /ΔVcs
FB Shorted to GND
VDD =16V
VDD=18V, FB=3V, CS=0
GATE with 1nF to GND
FB=3.3V
VDD = 16V
Δf_temp
VDD=16V,Ta = -20 to 85℃
Δf_VCC
Δf_OSC
F_shuffling
VOL
VOH
Vclamp
Tr
Tf
VCC = 12 to 25V
VCC = 16V, Io = -20mA
VDD = 16V, Io = 20 mA
VDD = 16V, CL = 1nf
VDD = 16V, CL = 1nf
IC
Min
7.5
13.5
0.75
60
Typ
8.5
14.5
1.4
34
4.8
2
0.4
3.7
47
6
75
330
40
120
0.8
22
Max
9.5
15.5
20
0.75
0.85
70
Unit
V
uA
mA
V
V/V
mA
V
mS
kΩ
%
nS
kΩ
nS
V
KHz
5
%
5
-3 3
65 Hz
0.8
10 V
13
200
ns
70
■ Marking
Marking
63**
www.kexin.com.cn 3