Catalog
Regulating Pulse Width Modulator
Key Features
• 8 To 35V Operation5V Reference Trimmed To ±1%1Hz To 400kHz Oscillator RangeDual 100mA Source/Sink OutputsDigital Current LimitingDouble Pulse SuppressionProgrammable DeadtimeUnder-Voltage LockoutSingle Pulse MeteringProgrammable Soft-StartWide Current Limit Common Mode RangeTTL/CMOS Compatible Logic PortsSymmetry Correction CapabilityGuaranteed 6 Unit Synchronization8 To 35V Operation5V Reference Trimmed To ±1%1Hz To 400kHz Oscillator RangeDual 100mA Source/Sink OutputsDigital Current LimitingDouble Pulse SuppressionProgrammable DeadtimeUnder-Voltage LockoutSingle Pulse MeteringProgrammable Soft-StartWide Current Limit Common Mode RangeTTL/CMOS Compatible Logic PortsSymmetry Correction CapabilityGuaranteed 6 Unit Synchronization
Description
AI
The UC1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Included in an 18-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. The UC1526 is characterized for operation over the full military temperature range of -55°C to +125°C. The UC2526 is characterized for operation from -25°C to +85°C, and the UC3526 is characterized for operation from 0° to +70°C.
The UC1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Included in an 18-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and setting logic, and two low impedance power drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. The UC1526 is characterized for operation over the full military temperature range of -55°C to +125°C. The UC2526 is characterized for operation from -25°C to +85°C, and the UC3526 is characterized for operation from 0° to +70°C.