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UC3524 Series

Advanced 40 VCC, double ended 300KHz voltage mode PWM controller with 45% duty cycle, 0C to 70C

Manufacturer: Texas Instruments

Catalog(5 parts)

PartOutput PhasesFunctionSynchronous RectifierTopologyPackage / CasePackage / CaseClock SyncOperating TemperatureOperating TemperatureOutput ConfigurationControl FeaturesMounting TypeFrequency - SwitchingDuty Cycle (Max)Output TypeNumber of OutputsVoltage - Supply (Vcc/Vdd)Voltage - Supply (Vcc/Vdd)Supplier Device Package
Texas Instruments
UC3524DTR
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 16-SOIC
1 ul
Step-Up, Step-Up/Step-Down
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
16-SOIC
0.003911599982529879 m, 3.900000095367432 ul
70 °C
0 °C
Positive
Current Limit, Enable, Frequency Control, Ramp
Surface Mount
300000 Hz
0.44999998807907104 ul
Transistor Driver
2 ul
40 V
8 V
16-SOIC
Texas Instruments
UC3524NG4
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 16-PDIP
1 ul
Step-Up, Step-Up/Step-Down
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
16-DIP
0.007619999814778566 m, 0.007619999814778566 m
70 °C
0 °C
Positive
Current Limit, Enable, Frequency Control, Ramp
Through Hole
300000 Hz
0.44999998807907104 ul
Transistor Driver
2 ul
40 V
8 V
16-PDIP
Texas Instruments
UC3524AN
Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC Controller IC 16-PDIP
1 ul
Step-Down, Step-Up, Step-Up/Step-Down
Boost, Buck, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
16-DIP
0.007619999814778566 m, 0.007619999814778566 m
70 °C
0 °C
Positive
Frequency Control
Through Hole
500000 Hz
0.44999998807907104 ul
Transistor Driver
2 ul
40 V
8 V
16-PDIP
Texas Instruments
UC3524DW
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 16-SOIC
1 ul
Step-Up, Step-Up/Step-Down
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
16-SOIC
70 °C
0 °C
Positive
Current Limit, Enable, Frequency Control, Ramp
Surface Mount
300000 Hz
0.44999998807907104 ul
Transistor Driver
2 ul
40 V
8 V
16-SOIC
Texas Instruments
UC3524D
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 16-SOIC
1 ul
Step-Up, Step-Up/Step-Down
Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
16-SOIC
0.003911599982529879 m, 3.900000095367432 ul
70 °C
0 °C
Positive
Current Limit, Enable, Frequency Control, Ramp
Surface Mount
300000 Hz
0.44999998807907104 ul
Transistor Driver
2 ul
40 V
8 V
16-SOIC

Key Features

Fully Interchangeable with Standard UC1524 FamilyPrecision Reference Internally Trimmed to ±1%High-Performance Current Limit FunctionUnder-Voltage Lockout with Hysteretic Turn-onStart-Up Supply Current Less Than 4mAOutput Current to 200mA60V Output CapabilityWide Common-Mode Input Range for both Error and Current Limit AmplifiersPWM Latch Insures Single Pulse per PeriodDouble Pulse Suppression Logic200ns Shutdown through PWM LatchGuaranteed Frequency AccuracyThermal Shutdown ProtectionFully Interchangeable with Standard UC1524 FamilyPrecision Reference Internally Trimmed to ±1%High-Performance Current Limit FunctionUnder-Voltage Lockout with Hysteretic Turn-onStart-Up Supply Current Less Than 4mAOutput Current to 200mA60V Output CapabilityWide Common-Mode Input Range for both Error and Current Limit AmplifiersPWM Latch Insures Single Pulse per PeriodDouble Pulse Suppression Logic200ns Shutdown through PWM LatchGuaranteed Frequency AccuracyThermal Shutdown Protection

Description

AI
The UC1524A family of regulating PWM ICs has been designed to retain the same highly versatile architecture of the industry standard UC1524 (SG1524) while offering substantial improvements to many of its limitations. The UC1524A is pin compatible with "non-A" models and in most existing applications can be directly interchanged with no effect on power supply performance. Using the UC1524A, however, frees the designer from many concerns which typically had required additional circuitry to solve. The UC1524A includes a precise 5V reference trimmed to ±1% accuracy, eliminating the need for potentiometer adjustments; an error amplifier with an input range which includes 5V, eliminating the need for a reference divider; a current sense amplifier useful in either the ground or power supply output lines; and a pair of 60V, 200mA uncommitted transistor switches which greatly enhance output versatility. An additional feature of the UC1524A is an under-voltage lockout circuit which disables all the internal circuitry, except the reference, until the input voltage has risen to 8V. This holds standby current low until turn-on, greatly simplifying the design of low power, off-line supplies. The turn-on circuit has approximately 600mV of hysteresis for jitter-free activation. Other product enhancements included in the UC1524A’s design include a PWM latch which insures freedom from multiple pulsing within a period, even in noisy environments, logic to eliminate double pulsing on a single output, a 200ns external shutdown capability, and automatic thermal protection from excessive chip temperature. The oscillator circuit of the UC1524A is usable beyond 500kHz and is now easier to synchronize with an external clock pulse. The UC1524A is packaged in a hermetic 16-pin DIP and is rated for operation from -55°C to +125°C. The UC2524A and 3524A are available in either ceramic or plastic packages and are rated for operation from -25°C to +85°C and 0°C to 70°C, respectively. Surface mount devices are also available. The UC1524A family of regulating PWM ICs has been designed to retain the same highly versatile architecture of the industry standard UC1524 (SG1524) while offering substantial improvements to many of its limitations. The UC1524A is pin compatible with "non-A" models and in most existing applications can be directly interchanged with no effect on power supply performance. Using the UC1524A, however, frees the designer from many concerns which typically had required additional circuitry to solve. The UC1524A includes a precise 5V reference trimmed to ±1% accuracy, eliminating the need for potentiometer adjustments; an error amplifier with an input range which includes 5V, eliminating the need for a reference divider; a current sense amplifier useful in either the ground or power supply output lines; and a pair of 60V, 200mA uncommitted transistor switches which greatly enhance output versatility. An additional feature of the UC1524A is an under-voltage lockout circuit which disables all the internal circuitry, except the reference, until the input voltage has risen to 8V. This holds standby current low until turn-on, greatly simplifying the design of low power, off-line supplies. The turn-on circuit has approximately 600mV of hysteresis for jitter-free activation. Other product enhancements included in the UC1524A’s design include a PWM latch which insures freedom from multiple pulsing within a period, even in noisy environments, logic to eliminate double pulsing on a single output, a 200ns external shutdown capability, and automatic thermal protection from excessive chip temperature. The oscillator circuit of the UC1524A is usable beyond 500kHz and is now easier to synchronize with an external clock pulse. The UC1524A is packaged in a hermetic 16-pin DIP and is rated for operation from -55°C to +125°C. The UC2524A and 3524A are available in either ceramic or plastic packages and are rated for operation from -25°C to +85°C and 0°C to 70°C, respectively. Surface mount devices are also available.