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BM0853 bảng dữ liệu(PDF) 4 Page - Bookly Micro electronic

tên linh kiện BM0853
Giải thích chi tiết về linh kiện  Green-Mode PWM Controller
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BM0853 bảng dữ liệu(HTML) 4 Page - Bookly Micro electronic

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2015/08/10 Ver.1
Page 4
BM0853
Green-Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA=25 , V
℃
CC=15V, unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage ( Vcc Pin )
Istt
Startup
Current
10
20
uA
VCOMP = 0V
2.7
4
mA
VCOMP = 3V
2.4
mA
Iop
Operating Current
Protection
tripped
(OLP, OVP)
1.0
mA
UVLO (off) Min. Operating Voltage
9.0
10.0
11.0
V
UVLO (on ) Start Threshold Voltage
15.0
16.0
17.0
V
OVP Level Over Voltage Protection
24
26
29.5
V
Voltage Feedback ( Comp Pin )
Isc
Short Circuit Current
1.25
2.2
mA
Vop
Open Loop Voltage
6
V
VTH(GM)
Green Mode Threshold VCOMP
2.35
V
Oscillator ( RT Pin )
FOSC
Frequency
RT=100KΩ
60.0
68.0
75.0
KHz
FOSC(GM) Green Mode Frequency
Fs=65.0KHz
22
KHz
Fdt
Frequency Variation versus Temp. Deviation (-40°C ~105°C)
3
%
Fdv
Frequency Variation versus VCC Deviation
(VCC=11V-25V)
1
%
Current Sensing ( CS Pin )
Vcs(off)
Maximum Input Voltage
0.8
0.85
0.9
V
TLEDD
Leading Edge Blanking Time
280
nS
Zcs
Input impedance
1
MΩ
TPD
Delay to Output
100
nS
Gate Driver Output ( OUT Pin )
DC (Max)
Maximum Duty Cycle
70
75
80
%
DC (Min)
Minimum Duty Cycle
0
%
VOL
Output Low Level
VCC=15V,
Io=20mA
1
V
VOH
Output High Level
VCC=15V,
Io=20mA
8
V
Tr
Rising Time
Load Cap=1000pF
50
200
nS
Tf
Falling Time
Load Cap=1000pF
30
120
nS
OLP ( Over Load Protection )
TLOLP
OLP Trip Level
5.0
V
TDOLP
OLP Delay Time (note)
60
mS
Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will set the higher
switching frequency and the shorter OLP delay time.
BM SEMI



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