IP1844 Datasheet, PDF (1/6 Pages) Seme LAB – CURRENT MODE REGULATING PULSE WIDTH MODULATORS

SEME
LAB
IP1844 SERIES
IP1845 SERIES
TOP VIEW
COMP 1
8 V_REF
V_FB 2
7 V_CC
I_SENSE 3
6 OUTPUT
R_T /C_T 4
5 GROUND
J Package – 8 Pin Ceramic DIP
N Package – 8 Pin Plastic DIP
D-8 Package – 8 Pin Plastic (150) SOIC
TOP VIEW
COMP 1
N/C 2
V_FB 3
N/C 4
I_SENSE 5
N/C 6
R_T /C_T 7
14 V_REF
13 N/C
12 V_CC
11 V_C
10 OUTPUT
9 GROUND
POWER
8
GROUND
CURRENT MODE
REGULATING
PULSE WIDTH
MODULATORS
FEATURES
• Guaranteed ±1% reference voltage tolerance
• Guaranteed ±10% frequency tolerance
• Low start–up current (<500 mA)
• Under voltage lockout with hysteresis
• Output state completely defined for all supply
and input conditions
• Interchangeable with UC1844 and UC1845
series for improved operation
• 500kHz Oscillator operation
250kHz Output operation
D-14 Package – 14 Pin Plastic (150) SOIC
Order Information
Part
Number
IP1844
IP2844
IP3844
IP1845
IP2845
IP3845
J–Pack N–Pack
8 Pin
8 Pin
D–8
8 Pin
D–14
14 Pin
Temp.
Range
-55 to +125°C
-25 to +85°C
0 to +70°C
-55 to +125°C
-25 to +85°C
0 to +70°C
Note:
To order, add the package identifier to the
part number.
eg. IP1844D–14
IP3845J
ABSOLUTE MAXIMUM RATINGS (T_case = 25°C unless otherwise stated)
V_CC
Supply Voltage
(low impedance source)
(I_CC < 30mA)
+30V
Self limiting
I_O
Output Current
±1A
Output Energy
(capacitive load)
5µJ
Analog Inputs
(pins 2 and 3)
Error Amp Output Sink Current
–0.3V to +V_CC
10mA
P_D
P_D
P_D
T_STG
T_L
Power Dissipation
Derate @ T_amb > 50°C
Power Dissipation
Derate @ T_amb > 50°C
Power Dissipation
Derate @ T_case > 25°C
Storage Temperature Range
Lead Temperature
T_amb = 25°C
T_case = 25°C
T_case = 25°C
J, N Packages
D Package
J, N Packages
(soldering, 10 seconds)
1W
10mW/°C
725mW
7.25mW/°C
2W
16mW/°C
–65 to 150°C
+300°C
Semelab plc. Telephone [phone]. Telex: 341927. Fax [phone].
Prelim. 2/95