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)
Part | Output Phases▲▼ | Function | Synchronous Rectifier▲▼ | Topology | Package / Case | Package / Case▲▼ | Clock Sync▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Output Configuration | Control Features | Mounting Type | Frequency - Switching▲▼ | Duty Cycle (Max)▲▼ | Output Type | Number of Outputs▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Supplier Device Package |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments UC3524DTRBoost, 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 UC3524NG4Boost, 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 UC3524ANBuck, 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 UC3524DWBoost, 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 UC3524DBoost, 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.