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PDF OB2279 Datasheet ( Hoja de datos )

Número de pieza OB2279
Descripción Current Mode PWM Controller
Fabricantes On-Bright 
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OB2279 datasheet

1 Page

OB2279 pdf
OB2279
Current Mode PWM ControllerFreq Shuffling with Latch Shutdown
ELECTRICAL CHARACTERISTICS
(TA = 25OC if not otherwise noted)
Symbol Parameter
Supply Voltage (VDD)
I_VDD_Startup VDD Start up Current
I_VDD_Ops Operation
Current
UVLO(Enter) VDD
Under Voltage
Lockout Enter
UVLO(Exit) VDD
Under Voltage
Lockout Exit
(Startup)
OVP(Latch)
VDD Over Voltage
Latch Trigger
OVP(De-Latch) VDD Latch Release
Voltage Threshold
I(Vdd)_latch
VDD bleeding current
at latch shutdown
when VDD = 9V
TD_OVP
VDD OVP Debounce
time
VDD_Clamp V
DD Zener Clamp
Voltage
T_Softstart
Soft Start Time
Feedback Input Section(FB Pin)
AVCS
PWM Input Gain
VFB_Open V
FB Open Voltage
Test Conditions
VDD =15V, RI=100K
Measure current into
VDD
VDD=16V,
RI=100Kohm, VFB=3V
26.5
RI = 100Kohm
RI = 100 Kohm, I(VDD ) =
5 mA
ΔVFB /ΔVcs
VDD = 16V
IFB_Short
FB pin short circuit
current
VTH_0D
Zero Duty Cycle FB
Threshold Voltage
VTH_BM
Burst Mode FB
Threshold Voltage
VTH_PL
Power Limiting FB
Threshold Voltage
TD_PL Power
limiting
Debounce Time
ZFB_IN Input
Impedance
Current Sense Input(Sense Pin)
T_blanking
Sense Input Leading
Edge Blanking Time
ZSENSE_IN Sense
Input
Impedance
TD_OC Over
Current
Detection and Control
Delay
VTH_OC_0 Current
Limiting
Threshold at No
Compensation
Short FB pin to GND,
measure current
VDD = 16V,
RI=100Kohm
VDD = 16V,
RI=100Kohm
RI = 100Kohm
CL=1nf at GATE,
RI=100Kohm
VDD = 16V, I(VIN) =
0uA, RI=100Kohm
Min Typ Max
3 20
2.3
8.8 9.8 10.8
15.5 16.5 17.5
28 29.5
7.5
45
80
35
3
2.8
6.2
0.75
0.95
1.6
4.4
80
9.0
300
30
70
V
0.85 0.90 0.95
Unit
uA
mA
V
V
V
V
uA
uSec
V
mSec
V/V
mA
V
V
V
mSec
Kohm
nSec
Kohm
nSec
V
©On-Bright Electronics
-5-
Confidential
OB_DOC_DS_79A0

5 Page

OB2279 arduino
OB2279
Current Mode PWM ControllerFreq Shuffling with Latch Shutdown
PACKAGE MECHANICAL DATA
8-Pin Plastic DIP
©On-Bright Electronics
- 11 -
Confidential
OB_DOC_DS_79A0

11 Page





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