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PDF OB2287 Datasheet ( Hoja de datos )

Número de pieza OB2287
Descripción High Performance Current Mode PWM Controller
Fabricantes On-Bright Electronics 
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OB2287 datasheet

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OB2287 pdf
OB2287
High Performance Current Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25OC, RI=20K ohm, VDD=16V, if not otherwise noted)
Symbol
Parameter
Supply Voltage (VDD) Section
I_VDD_Startup VDD Start up Current
I_VDD_Ops
UVLO(Enter)
UVLO(Exit)
OVP(Latch)
OVP(De-Latch)
I(Vdd)_latch
TD_OVP
VDD_Clamp
T_Softstart
Operation Current
VDD Under Voltage
Lockout Enter
VDD Under Voltage
Lockout Exit
(Startup)
VDD Over Voltage
Latch Trigger
VDD Latch Release
Voltage Threshold
VDD bleeding current
at latch shutdown
when VDD = 8V
VDD OVP Debounce
time
VDD Zener Clamp
Voltage
Soft Start Time
Feedback Input Section(FB Pin)
AVCS
PWM Input Gain
VFB_Open
VFB Open Voltage
Test Conditions
VDD =15V, Measure
current into VDD
VFB=3V
I(VDD ) = 5 mA
ΔVFB /ΔVcs
VDD=18V
Min Typ Max Unit
5 20 uA
2.3 mA
8 9 10 V
14 15 16 V
26.5 28
6.5
45
29.5 V
V
uA
100 uSec
31 V
16 mSec
2.2 V/V
6V
IFB_Short
VTH_0D
VTH_BM
VTH_PL
TD_PL
ZFB_IN
FB pin short circuit
current
Zero Duty Cycle FB
Threshold Voltage
Burst Mode FB
Threshold Voltage
Power Limiting FB
Threshold Voltage
Power limiting
Debounce Time
Input Impedance
VDD=18V, Short FB pin
to GND, measure current
1.1
1.6
4.4
250
6
Current Sense Input(Sense Pin) Section
T_blanking
Sense Input Leading
Edge Blanking Time
VTH_OC_0
Internal current
limiting threshold
TD_OC
Over Current
Detection and Control
Delay
VDD=18V
Zero duty cycle
CL=1nf at GATE,
350
0.68 0.7
70
Oscillator Section
FOSC Normal Oscillation
Frequency
F(shuffle)/Fosc Frequency shuffling
range
60 65
-4
mA
1V
V
V
mSec
Kohm
nSec
0.72 V
nSec
70 KHZ
4%
©On-Bright Electronics
-5-
Confidential
OB_DOC_DS_8700
Free Datasheet http://www.d

5 Page

OB2287 arduino
OB2287
High Performance Current Mode PWM Controller
PACKAGE MECHANICAL DATA
8-Pin Plastic DIP
©On-Bright Electronics
- 11 -
Confidential
OB_DOC_DS_8700
Free Datasheet http://www.datasheetlist.com/

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