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UC2526AM

ACTIVE

Regulating Pulse Width Modulator

Product details

Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Voltage Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 600 Features Adjustable switching frequency, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 7/6.8 Operating temperature range (°C) -25 to 85 Rating Military Gate drive (typ) (A) 0.2 Vin (max) (V) 35
Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Voltage Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 600 Features Adjustable switching frequency, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 7/6.8 Operating temperature range (°C) -25 to 85 Rating Military Gate drive (typ) (A) 0.2 Vin (max) (V) 35
CDIP (J) 18 159.852 mm² 23.1 x 6.92
  • 8 To 35V Operation
  • 5V Reference Trimmed To ±1%
  • 1Hz To 400kHz Oscillator Range
  • Dual 100mA Source/Sink Outputs
  • Digital Current Limiting
  • Double Pulse Suppression
  • Programmable Deadtime
  • Under-Voltage Lockout
  • Single Pulse Metering
  • Programmable Soft-Start
  • Wide Current Limit Common Mode Range
  • TTL/CMOS Compatible Logic Ports
  • Symmetry Correction Capability
  • Guaranteed 6 Unit Synchronization
  • 8 To 35V Operation
  • 5V Reference Trimmed To ±1%
  • 1Hz To 400kHz Oscillator Range
  • Dual 100mA Source/Sink Outputs
  • Digital Current Limiting
  • Double Pulse Suppression
  • Programmable Deadtime
  • Under-Voltage Lockout
  • Single Pulse Metering
  • Programmable Soft-Start
  • Wide Current Limit Common Mode Range
  • TTL/CMOS Compatible Logic Ports
  • Symmetry Correction Capability
  • Guaranteed 6 Unit Synchronization

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.

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* Data sheet Regulating Pulse Width Modulator datasheet 05 Sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 Sep 1999

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