CURRENT MODE REGULATING PULSE WIDTH MODULATORS
Description
LAB
TOP VIEW
COMP 1 V FB 2 I SENSE 3 R T /C T 4
8 7 6 5
SEME
IP1842A SERIES IP1843A SERIES
VREF VCC OUTPUT GROUND
CURRENT MODE REGULATING PULSE WIDTH MODULATORS
FEATURES
• • • • • • Guaranteed ±1% reference voltage tolerance Accurate oscillator discharge current 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 IP and UC1842/3 series for improved operation • 500kHz Oscillator operation
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 14 13 12 11 10 9 8
VREF N/C VCC VC OUTPUT GROUND POWER GROUND
V FB 3 N/C
4
I SENSE 5 N/C
6
R T /C T 7
D-14 Package – 14 Pin Plastic (150) SOIC
Order Information
Part Number IP1842A IP2842A IP3842A IP1843A IP2843A IP3843A J–Pack 8 Pin N–Pack 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.
IP1842AD–14 IP3843AJ
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
VCC IO Supply Voltage Output Current Output Energy Analog Inputs Error Amp Output Sink Current Power Dissipation Derate @ Tamb > 50°C Power Dissipation Derate @ Tamb > 50°C Power Dissipation Derate @ Tcase > 25°C Storage Temperature Range Lead Temperature (low impedance source) (ICC < 30mA) (capacitive load) (pins 2 and 3) Tamb = 25°C Tcase = 25°C Tcase = 25°C J, N Packages D Package J, N Packages +30V Self limiting ±1A 5µJ –0.
3V to +VCC 10mA 1W 10mW/°C 725mW 7.
25mW/°C 2W 16mW/°C –65 to 150°C +300°C
Prelim.
2/95
PD PD PD TSTG TL
(soldering, 10 seconds)
Semelab plc.
Telephone (01455) 556565.
Telex: 341927.
Fax (01455) 552612.
LAB
DESCRIPTION
SEME
IP1842A SERIES IP1843A SERIES
The IP1842A/IP1843A series of switching regulator control circuits contain all the functions necessary to implement off-line, curre...
Similar Datasheet
