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UC3843B is a control IC for off-line or DC to DC fixed frequency current mode control schemes with minimal external parts. It has low start-up and operating current, undervoltage lockout, current limit, trimmed oscillator, and totem pole output.
UC3843B Product details. DESCRIPTION. The UC384xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.
The UC3842B, UC3843B 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. A representative block diagram is shown in Figure 19. Oscillator.
- 738KB
- 25
UCx84x Current-Mode PWM Controllers 1 Features • Optimized for off-line and DC-to-DC converters • Low start-up current (< 1 mA) • Automatic feedforward compensation
- 4MB
- 56
OSCILLATOR FREQUENCY GUARANTEED. AT 250kHz . CURRENT MODE OPERATION TO 500kHz AUTOMATIC FEED FORWARD COMPENSA-. TION. LATCHING PWM FOR CYCLE-BY-CYCLE. CURRENT LIMITING. INTERNALLY TRIMMED REFERENCE WITH. UNDERVOLTAGE LOCKOUT . HIGH CURRENT TOTEM POLE OUTPUT UNDERVOLTAGE LOCKOUT WITH HYSTER-.
Features. Trimmed Oscillator for Precise Frequency Control. Oscillator Frequency Guaranteed at 250 kHz. 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
Features. • Trimmed Oscillator for Precise Frequency Control. • Oscillator Frequency Guaranteed at 250 kHz. • 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.
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+STMICROELECTRONICS+%7C+HIGH+PERFORMANCE+...&oid=3&h=1263&w=892&turl=https%3A%2F%2Ftse1.mm.bing.net%2Fth%3Fid%3DOIP.HLK4_GRJhswQukdTxQAfaQHaKf%26pid%3DApi&tt=UC3843B+datasheet(12%2F15+Pages)+STMICROELECTRONICS+%7C+HIGH+PERFORMANCE+...&sigr=oIseEpCRSY4j&sigit=8LVdizro3nyP&sigi=z32Kx8.Qj_0U&sign=sapPCi5JAjzM&sigt=sapPCi5JAjzM "UC3843B datasheet(12/15 Pages) STMICROELECTRONICS | HIGH PERFORMANCE ...")
