UC2525BDWTRG4 ,Regulating Pulse Width Modulators 16-SOIC -40 to 85FEATURES DESCRIPTION• 8 to 35V Operation The UC1525B/1527B series of pulse width modulator integrat ..
UC2525BN ,Regulating Pulse Width ModulatorsSupport &Product Order Tools &TechnicalCommunityFolder Now Documents SoftwareUC1525A,UC1527A,UC2525 ..
UC2525BN ,Regulating Pulse Width ModulatorsBlock Diagram..... 812 Mechanical, Packaging, and Orderable7.3 Feature Description...... 9Informati ..
UC2525BN ,Regulating Pulse Width ModulatorsBlock DiagramPDIP (16) 19.30 mm × 6.35 mmOSCVREF OUTPLCC (20) 8.96 mm × 8.96 mm16 413 VC(1) For all ..
UC2526 ,Regulating Pulse Width ModulatorELECTRICAL CHARACTERISTICS: +VIN = 15V, and over operating ambient temperature, unless otherwisespe ..
UC2526ADW ,Regulating Pulse Width ModulatorUC1526AUC2526AUC3526ARegulating Pulse Width Modulator
ULN2066B ,50VULN2064B - ULN2066BULN2068B - ULN2070BULN2074B - ULN2076B50V - 1.5A QUAD DARLINGTON SWITCHES.OUTPUT ..
ULN2067B ,80 VELECTRICAL CHARACTERISTICS (T = 25 C unless otherwise specified )ambSymbol Parameter Test Condition ..
ULN2068B ,50VULN2064B - ULN2066BULN2068B - ULN2070BULN2074B - ULN2076B50V - 1.5A QUAD DARLINGTON SWITCHES.OUTPUT ..
ULN2069B ,QUAD 1.5 A DARLINGTON SWITCHESULN2065B - ULN2067BULN2069B - ULN2071BULN2075B - ULN2077B80 V - 1.5 A QUAD DARLINGTON SWITCHES.OUTP ..
ULN2069LB , QUAD 1.5 A DARLINGTON SWITCHES
ULN2070B ,50VULN2064B - ULN2066BULN2068B - ULN2070BULN2074B - ULN2076B50V - 1.5A QUAD DARLINGTON SWITCHES. OUTPU ..
UC2525BDWTR-UC2525BDWTRG4
Regulating Pulse Width Modulators
UC1525B UC1527B
UC2525B UC2527B
UC3525B UC3527B
DESCRIPTIONThe UC1525B/1527B seriesof pulse width modulator integrated circuits
are designedto offer improved performance and lowered external parts
count when usedin designingall typesof switching power supplies. The
on-chip +5.1V buried zener referenceis trimmedto ±0.75% and the input
common-mode rangeof the error amplifier includes the reference voltage,
eliminating external resistors.A sync inputto the oscillator allows multiple
unitstobe slavedora single unittobe synchronizedto an external system
clock.A single resistor between the CT and the discharge terminals provide wide rangeof dead time adjustment. These devices also feature built-in
soft-start circuitry with only an external timing capacitor required.A shut-
down terminal controls both the soft-start circuitry and the output stages,
providing instantaneous turn off through the PWM latch with pulsed shut-
down,as wellas soft-start recycle with longer shutdown commands. These
functions are also controlledby an undervoltage lockout which keeps the
outputsoff and the soft-start capacitor discharged for sub-normal input volt-
ages. This lockout circuitry includes approximately 500mVof hysteresis for
jitter-free operation. Another featureof these PWM circuitsisa latch follow-
ing the comparator. Oncea PWM pulse has been terminated for any rea-
son, the outputs will remain off for the durationof the period. The latchis
reset with each clock pulse. The output stages are totem-pole designs ca-
pableof sourcingor sinkingin excessof 200mA. The UC1525B output
stage features NOR logic, givinga LOW output for an OFF state. The
UC1527B utilizes OR logic which resultsina HIGH output level when OFF.
Regulating Pulse Width Modulators
FEATURES8to 35V Operation 5.1V Buried Zener Reference
Trimmedto ±0.75% 100Hzto 500kHz Oscillator Range Separate Oscillator Sync Terminal Adjustable Deadtime Control Internal Soft-Start Pulse-by-Pulse Shutdown Input Undervoltage Lockout with
Hysteresis Latching PWMto Prevent Multiple
Pulses Dual Source/Sink Output Drivers Low Cross Conduction Output Stage Tighter Reference Specifications
BLOCK DIAGRAMUC3527B Not Recommended For New Designs
