IP1842 SERIES
IP1843 SERIES
TOP VIEW
COMP
1
V
FB
2
I
SENSE
3
R
T
/C
T
4
8
7
6
5
V
REF
V
CC
OUTPUT
GROUND
CURRENT MODE
REGULATING
PULSE WIDTH
MODULATORS
FEATURES
鈥?Guaranteed 鹵1% reference voltage tolerance
鈥?Guaranteed 鹵10% frequency tolerance
鈥?Low start鈥搖p current (<500
m
A)
鈥?Under voltage lockout with hysteresis
鈥?Output state completely defined for all supply
and input conditions
鈥?Interchangeable with UC1842 and UC1843
series for improved operation
鈥?500kHz operation
J Package 鈥?8 Pin Ceramic DIP
N Package 鈥?8 Pin Plastic DIP
D-8 Package 鈥?8 Pin Plastic (150) SOIC
TOP VIEW
COMP
1
N/C
2
14
13
12
11
10
9
8
V
REF
N/C
V
CC
V
C
OUTPUT
GROUND
POWER
GROUND
V
FB
3
N/C
4
I
SENSE
5
N/C
6
R
T
/C
T
7
D-14 Package 鈥?14 Pin Plastic (150) SOIC
Order Information
Part
Number
IP1842
IP2842
IP3842
IP1843
IP2843
IP3843
J鈥揚ack
8 Pin
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
N鈥揚ack
8 Pin
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
D鈥?
8 Pin
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
D鈥?4
14 Pin
鉁?/div>
鉁?/div>
鉁?/div>
鉁?/div>
Temp.
Range
-55 to +125擄C
-25 to +85擄C
0 to +70擄C
-55 to +125擄C
-25 to +85擄C
0 to +70擄C
Note:
To order, add the package identifier to the
part number.
eg.
IP1842J
IP3843D-14
ABSOLUTE MAXIMUM RATINGS
(T
case
= 25擄C unless otherwise stated)
V
CC
I
O
Supply Voltage
Output Current
Output Energy
Analog Inputs
Error Amp Output Sink Current
Power Dissipation
Derate @ T
amb
> 50擄C
Power Dissipation
Derate @ T
case
> 25擄C
Storage Temperature Range
Lead Temperature
(low impedance source)
(I
CC
< 30mA)
(capacitive load)
(pins 2 and 3)
T
amb
= 25擄C
T
case
= 25擄C
+30V
Self limiting
鹵1A
5
m
J
鈥?.3V to +V
CC
10mA
1W
10mW/擄C
2W
24mW/擄C
鈥?5 to 150擄C
+300擄C
Prelim.3/00
P
D
P
D
T
STG
T
L
(soldering, 10 seconds)
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
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廠商
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