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)
UC3843A-UC3843AD8-UC3843AD8TR-UC3843AD8TRG4-UC3843ADTR-UC3843ADTRG4-UC3843ANG4
Current Mode PWM Controller 0-WAFERSALE
VIN
UC2843A
VCC
VREF
RT/CT
GND
ISENSE
OUTPUT
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UC1842A, UC1843A, UC1844A, UC1845A
UC2842A, UC2843A, UC2844A, UC2845A
UC3842A, UC3843A, UC3844A, UC3845ASLUS224F –SEPTEMBER 1994–REVISED OCTOBER 2017
UCx84xA Current-Mode PWM Controller Features Optimized for Off-Line and DC-DC Converters Low Start-Up Current(< 0.5 mA) Trimmed Oscillator Discharge Current Automatic Feedforward Compensation Pulse-by-Pulse Current Limiting Enhanced Load Response Characteristics Undervoltage Lockout With Hysteresis Double Pulse Suppression High-Current Totem Pole Output Internally-Trimmed Bandgap Reference Upto 500-kHz Operation Createa Custom Design Using the UCx84xA With
the WEBENCH® Power Designer
Applications Switch Mode Power Supplies (SMPS) DC-DC Converters Power Modules Industrial PSU Battery Operated PSU
DescriptionThe UCx84xA familyof control devicesisa pin-for-pin
compatible improved versionof the UCx84x family.
Providing the necessary featuresto control current-
modeor switched-mode power supplies, this family
devices has many improved features: startup current less than 0.5 mA, oscillator dischargeis trimmed
8.3 mA, and during UVLO, the output stage can least10 mAat less than 1.2V for VCC over5
Device Information(1)(1) Forall available packages, see the orderable addendum
the endofthe data sheet.
Device Comparison Table
Simplified Application Diagram
