UC2824 Series

30-V, 1.5A double ended 1MHz PWM controller with 9.2V/8.4V UVLO, 80% duty cycle, -40C to 85C

Catalog

30-V, 1.5A double ended 1MHz PWM controller with 9.2V/8.4V UVLO, 80% duty cycle, -40C to 85C

Part	Frequency - Switching [Min]	Frequency - Switching [Max]	Supplier Device Package	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Type	Output Phases	Number of Outputs	Topology	Control Features	Duty Cycle (Max)	Function	Mounting Type	Package / Case	Package / Case	Package / Case	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [x]	Package / Case [y]
Texas Instruments UC2824N	340 kHz	460 kHz	16-PDIP	8.4 V	30 V	Transistor Driver	1	1	Boost	Current Limit Enable Frequency Control Ramp Soft Start	80 %	Step-Up	Through Hole	0.3 in	16-DIP	7.62 mm	Positive	85 °C	-40 °C
Texas Instruments UC2824DW	340 kHz	460 kHz	16-SOIC	8.4 V	30 V	Transistor Driver	1	1	Boost	Current Limit Enable Frequency Control Ramp Soft Start	80 %	Step-Up	Surface Mount		16-SOIC		Positive	85 °C	-40 °C	0.295 in	7.5 mm
Texas Instruments UC2824DWTR	340 kHz	460 kHz	16-SOIC	8.4 V	30 V	Transistor Driver	1	1	Boost	Current Limit Enable Frequency Control Ramp Soft Start	80 %	Step-Up	Surface Mount		16-SOIC		Positive	85 °C	-40 °C	0.295 in	7.5 mm
Texas Instruments UC2824Q

Catalog

30-V, 1.5A double ended 1MHz PWM controller with 9.2V/8.4V UVLO, 80% duty cycle, -40C to 85C

Key Features

• Complementary OutputsPractical Operation Switching Frequencies to 1 MHz50-ns Propagation Delay to OutputHigh Current Dual Totem Pole Outputs (1.5 A Peak)Wide Bandwidth Error AmplifierFully Latched Logic With Double Pulse SuppressionPulse-by-Pulse Current LimitingSoft Start/Maximum Duty Cycle ControlUnder-Voltage Lockout with HysteresisLow Start Up Current (1.1 mA)Trimmed Bandgap Reference (5.1 V ± 1%)Complementary OutputsPractical Operation Switching Frequencies to 1 MHz50-ns Propagation Delay to OutputHigh Current Dual Totem Pole Outputs (1.5 A Peak)Wide Bandwidth Error AmplifierFully Latched Logic With Double Pulse SuppressionPulse-by-Pulse Current LimitingSoft Start/Maximum Duty Cycle ControlUnder-Voltage Lockout with HysteresisLow Start Up Current (1.1 mA)Trimmed Bandgap Reference (5.1 V ± 1%)

Description

The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward. Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance. The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward. Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.