UC3843A ,Current mode PWM control circuit.3AN1080/DIf the efficiency is taken into account and it is assumed that L 1.66 mHpthe typical con ..
UC3843A ,Current mode PWM control circuit.features to implement off-line or DC toDC fixed frequency current mode control schemesDifferences b ..
UC3843A ,Current mode PWM control circuit.
UC3843A ,Current mode PWM control circuit.
UC3843A ,Current mode PWM control circuit.UC284XAUC384XAHIGH PERFORMANCE CURRENT MODE PWM CONTROLLERNOT FOR NEW DESIGN1
UC3843A ,Current mode PWM control circuit.ELECTRICAL CHARACTERISTICS (V = 15 V, [Note 4], R = 10 k, C = 3.3 nF, T = T to T [Note 5],CC T T A ..
UMX4 N , High transition frequency (dual transistors)
UMX4 NTR , Two 2SC3837K chips in a EMT or UMT or SMT package.
UMX4N , High transition frequency (dual transistors)
UMX4NTR , Two 2SC3837K chips in a EMT or UMT or SMT package.
UMX5N , High transition frequency (dual transistors)
UMZ1 N , General purpose transistor (dual transistors)
UC3842A#-UC3842AD-UC3842ADR2-UC3843A-UC3843A+-UC3843AD-UC3843ADR2-UC3843AN
High Performance Current Mode Controller
UC3842A, UC3843A,
UC2842A, UC2843A
High Performance
Current Mode Controllers
The UC3842A, UC3843A series of high performance fixed
frequency current mode controllers are specifically designed for
off−line and DC−to−DC converter applications offering the designer a
cost effective solution with minimal external components. These
integrated circuits feature a trimmed oscillator for precise duty cycle
control, a temperature compensated reference, high gain error
amplifier, current sensing comparator, and a high current totem pole
output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, programmable output deadtime, and a latch for single
pulse metering.
These devices are available in an 8−pin dual−in−line plastic package
as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14
package has separate power and ground pins for the totem pole output
stage.
The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off),
ideally suited for off−line converters. The UCX843A is tailored for
lower voltage applications having UVLO thresholds of 8.5 V (on) and
7.6 V (off).
Features Trimmed Oscillator Discharge Current for Precise Duty Cycle
Control Current Mode Operation to 500 kHz Automatic Feed Forward Compensation Latching PWM for Cycle−By−Cycle Current Limiting Internally Trimmed Reference with Undervoltage Lockout High Current Totem Pole Output Undervoltage Lockout with Hysteresis Low Startup and Operating Current Direct Interface with ON Semiconductor SENSEFET Products Pb−Free Packages are Available
