BL8501
ABSOLUTE MAXMUM RATINGS
Symbol
V
IN
V
EXT
V
CE
V
FB
I
EXT
P
D
T
opt
T
stg
V
IN
Supply Voltage
EXT Pin Output Voltage
CE Pin Input Voltage
V
FB
Pin Input Voltage
EXT Pin Inductor Drive Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Item
Rating
12
-0.3 ~ VIN +0.3
-0.3 ~ VIN +0.3
-0.3 ~ VIN +0.3
20
100
-20 ~ +85
-55 ~ +125
Unit
V
V
V
V
mA
mW
ELECTRICAL CHARACTERISTICS
Symbol
V
IN
V
FB
Item
Operating Input Voltage
Feedback Voltage
V
IN
=V
CE
=8V,
I
FB
=-100mA
V
FB
/
Conditions
Min.
3.5
0.98
1.00
Typ.
Max.
12
1.02
Unit
V
V
T
Feedback Voltage
Temperature Coefficient
-20
Topt
85
100
ppm/
fosc
Oscillator Frequency
V
IN
=V
CE
=8V,
I
FB
=-100mA
400
500
600
KHz
f
OSC
/
T
Oscillator Frequency
Temperature Coefficient
-20
Topt
85
0.2
%/
I
DD
1
Istb
Supply Current 1
Standby Current
V
IN
= V
CE
= V
FB
=8.0V
V
IN
=8.0V,
=0V
V
CE
=V
FB
65
0
1
A
A
I
EXTH
EXT “H” Output Current
V
IN
= 8V, V
EXT
= 7.9V,
V
CE
=0, V
FB
=8V
-7.8
mA
I
EXTL
EXT “L” Output Current
V
IN
= 8V, V
EXT
= 0.1V,
V
CE
= 8V, V
FB
= 0V
6.1
mA
I
CEH
I
CEL
CE “H” Input Current
CE “L” Input Current
V
IN
= V
CE
= V
FB
=8.0V
V
IN
= V
FB
=8.0V, V
CE
=
0V
-0.5
0
0
0.5
A
A
V
CEH
V
CEL
Maxdty
CE “H” Input Voltage
CE “L” Input Voltage
Oscillator Maximum Duty
Cycle
V
IN
= 8V, V
FB
= 0V
V
IN
= 8V, V
FB
= 0V
1.5
0.3
100
V
V
%
Tstart
Delay Time by Soft-start
function
V
IN
= 8V, I
FB
= -10mA
V
CE
= 0
>8V
3
7
10
ms
Tprot
Delay Time for protection
circuit
V
IN
= V
CE
= 8V
V
FB
= 2.5V >0V
150
200
250
s
http://www.belling.com.cn
- 3-
Total
10
Pages
8/8/2006
BELLING [ SHANGHAI BELLING CO., LTD. ]
