UC1526 Regulating Pulse Width Modulator | TI.com

UC1526
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Regulating Pulse Width Modulator

Regulating Pulse Width Modulator - UC1526
Datasheet
 

Description

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.

Features

  • 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

Parametrics

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Part number Order Topology Control method VCC (Min) (V) VCC (Max) (V) Frequency (Max) (kHz) UVLO thresholds on/off (V) Duty cycle (Max) (%) Gate drive (Typ) (A) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
UC1526 Order now Boost
Flyback
Forward
Full-Bridge
Half-Bridge
Push-Pull    
Voltage         400     4.4/4.2     50     0.1     Error Amplifier
Multi-topology
Soft Start
Synchronization Pin    
Military     -55 to 125     CDIP | 18     18CDIP: 160 mm2: 6.92 x 23.1 (CDIP | 18)    
UC2526 Samples not available Boost
Flyback
Forward
Full-Bridge
Half-Bridge
Push-Pull    
Voltage     8     35     400     7/6.8     50     0.1     Error Amplifier
Multi-topology
Soft Start
Synchronization Pin    
Catalog     -25 to 85     PDIP | 18     18PDIP: 211 mm2: 9.4 x 22.48 (PDIP | 18)    
UC3526 Order now Boost
Flyback
Forward
Full-Bridge
Half-Bridge
Push-Pull    
Voltage     8     35     400     7/6.8     50     0.1     Error Amplifier
Multi-topology
Soft Start
Synchronization Pin    
Catalog     0 to 70     PDIP | 18
SOIC | 18    
18PDIP: 211 mm2: 9.4 x 22.48 (PDIP | 18)
18SOIC: 119 mm2: 10.3 x 11.55 (SOIC | 18)