Text: fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features Description · · · · The UC3842/UC3843/ UC3844 /UC3845 are fixed frequency current-mode PWM controller. They , under-voltage lockout and current limiting. TheUC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off , cycle. CURRENT MODE PWM CONTROL CIRCUITS DESCRIPTION The UTC3844D/E provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 0.5mA,a precision filexlib. Current-mode PWM controller UC3842 August 31, 1994 1103 DC AND AC ELECTRICAL CHARACTERISTICS 0≤TJ≤70°C for UC3842; VCC=154; RT=10kΩ; CT=3.3nF, unless otherwise specified SYMBOL PARAMETER TEST CONDITIONS UC3842 UNIT Min Typ Max Output section VOL Output Low-Level ISINK=20mA 0.1 0.4 V UC3844/D UC3844, UC3845, UC2844, UC2845 High Performance Current Mode Controllers The UC3844, UC3845 series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost effective solution with minimal external components. These
The UC184x devices are specified for operation from -55°C to 125°C, the UC284x series is specified for operation from -40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C. Device Information(1) PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
CURRENT MODE PWM CONTROLLERS DESCRIPTION The HG are high performance fixed frequency current mode controllers that specifically designed for Off-Line and DC to DC converter applications with minimal external parts count. The differences between UC3844 and UC3845 are the maximum duty cycle ranges and under-voltage lockout thresholds. The
uc2845bd1r2g 数据表(pdf) 16 page - on semiconductor high performance current mode pwm controller uc2845bd1: 135kb / 15p: high performance current mode pwm controller uc2845bd1: high performance current mode controllers 1996 rev 1: uc3844: 376kb / 14p: high performance current mode controllers 1996 rev 1: motorola, inc:
UC3844/D UC3844, UC3845, UC2844, UC2845 High Performance Current Mode Controllers The UC3844, UC3845 series are high performance fixed frequency current mode controllers. They are specifically designed for Off ïLine and DCïtoïDC converter applications offering the designer a cost effective solution with minimal external components. These
Download UC3844 datasheet from SGS Thomson Microelectronics: pdf 103 kb : CURRENTMODE PWM CONTROLLER: Download UC3844 datasheet from SGS Thomson Microelectronics: pdf 103 kb : Current-Mode PWM Controller Others with the same file for datasheet: UC3844D8, UC3844D8G4, UC3844D8TR, UC3844D8TRG4, UC3844DG4: Download UC3844 datasheet from Texas
UC3843 Features Current-Mode PWM controller Operating Voltage: 7.0V to 8.2V Output pin current: 1A Analog input range: -0.3 to 6.3V Oscillation Frequency: 52 Typically Gain: 3V Maximum source current: 22mA Low Output Voltage: 0.08V High Output Voltage: 13.5V Low startup current (<1 mA) Pulse by pulse current limiting
UC1844, UC2844, UC3844, UC1845, UC2845, UC3845 SLUS223E -APRIL 1997-REVISED JANUARY 2017 UCx84x Current-Mode PWM Controllers 1 Features 1 1 • Optimized for Off-Line and DC-to-DC Converters • Low Start-Up Current (< 1 mA) • Automatic Feedforward Compensation • Pulse-by-Pulse Current Limiting

Current mode pwm controller uc3844