UC2843AQD8RG4Q1 ,Automotive Catalog Current-Mode PWM Controller 8-SOIC -40 to 125ELECTRICAL CHARACTERISTICS(1)T = –40°C to 125°C, V = 15 V , R = 10 kΩ, C = 3.3 nF, T = T (unless ot ..
UC2843B ,High Performance Current Mode ControllerUC2842B/3B/4B/5BUC3842B/3B/4B/5B® HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER. TRIMMED OSCILLATOR ..
UC2843BD ,High Performance Current Mode Controllerfeatures to implement off-line or DC to DC UVLO thresholds of 16V (on) and 10V (off), ideallysuited ..
UC2843BD1 ,HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERUC2842B/3B/4B/5BUC3842B/3B/4B/5B® HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER. TRIMMED OSCILLATOR ..
UC2843BD1013TR ,HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERUC2842B/3B/4B/5BUC3842B/3B/4B/5B® HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER. TRIMMED OSCILLATOR ..
UC2843BDG , High Performance Current Mode Controllers
UM5K1 N , Small switching (30V, 0.1A)
UM5K1 NTR , 2.5V Drive NchNch MOS FET
UM5K1 N TR , 2.5V Drive NchNch MOS FET
UM5K1n , Small switching (30V, 0.1A)
UM5K1NTR , 2.5V Drive NchNch MOS FET
UM5K1NTR , 2.5V Drive NchNch MOS FET
UC2843AQD8RG4Q1
Automotive Catalog Current-Mode PWM Controller 8-SOIC -40 to 125
1FEATURES D PACKAGE
(TOP VIEW)COMP
VFB
ISENSE
RT/CT
VREF
VCC
OUTPUT
GND
DESCRIPTION/ORDERING INFORMATION
UC2843A-Q1
www.ti.com........................................................................................................................................................................................................ SGLS384–MAY 2008
CURRENT-MODE PWM CONTROLLER Qualified for Automotive Applications Extended Temperature Performanceof
–40°Cto 125°C Optimized for Off-Line and DC-to-DC
Converters Low Start-Up Current (<0.5 mA) Trimmed Oscillator-Discharge Current Automatic Feed-Forward Compensation Pulse-by-Pulse Current Limiting Double-Pulse Suppression High-Current Totem-Pole Output Internally 500-kHz Operation Low RO Error AmpThe UC2843A controlICisa pin-for-pin compatible improved versionof the UC2843. Providing the necessary
featuresto control current mode switched mode power supplies, this device has the following improved features.
Start up currentis specified to be less than 0.5 mA. Oscillator dischargeis trimmedto 8.3 mA. During
undervoltage lockout, the output stage can sinkat least10 mAat less than 1.2Vfor VCC over5V.
MAXIMUM DUTYPART NUMBER UVLO ON UVLO OFF CYCLEUC2843A 8.5V 7.9V <100%
ORDERING INFORMATION(1) PACKAGE(2) ORDERABLE PART NUMBER TOP-SIDE MARKING–40°Cto 125°C SOIC-8–D8 Reelof 2500 UC2843AQD8RQ1 UC2843AQ
