UC2526 Datasheet PDF


Part Number

UC2526

Description

Regulating Pulse Width Modulator

Manufacture

Unitrode

Total Page 10 Pages
PDF Download
Download UC2526 Datasheet PDF


Features Datasheet pdf Regulating Pulse Width Modulator UC1526 UC2526 UC3526 FEATURES • 8 To 35V O peration • 5V Reference Trimmed To ± 1% • 1Hz To 400kHz Oscillator Range Dual 100mA Source/Sink Outputs • D igital Current Limiting • Double Puls e Suppression • Programmable Deadtime • Under-Voltage Lockout • Single P ulse Metering • Programmable Soft-Sta rt • Wide Current Limit Common Mode R ange • TTL/CMOS Compatible Logic Port s • Symmetry Correction Capability Guaranteed 6 Unit Synchronization DE SCRIPTION The UC1526 is a high performa nce monolithic pulse width modulator ci rcuit designed for fixed-frequency swit ching regulators and other power contro l applications. Included in an 18-pin dual-in-line package are a .
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UC2526 Datasheet
Regulating Pulse Width Modulator
UC1526
UC2526
UC3526
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
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 pack-
age are a temperature compensated voltage reference, sawtooth os-
cillator, 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 cor-
rection 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 regu-
lators of either polarity, both transformerless and transformer cou-
pled. 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.
BLOCK DIAGRAM
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