器件名称: UC2524
功能描述: Advanced Regulating Pulse Width Modulators
文件大小: 326.74KB 共8页
简 介:UC1524 UC2524 UC3524
Advanced Regulating Pulse Width Modulators
FEATURES
Complete PWM Power Control Circuitry Uncommitted Outputs for Single-ended or Push-pull Applications Low Standby Current…8mA Typical Interchangeable with SG1524, SG2524 and SG3524, Respectively
DESCRIPTION
The UC1524, UC2524 and UC3524 incorporate on a single monolithic chip all the functions required for the construction of regulating power supplies, inverters or switching regulators. They can also be used as the control element for high-power-output applications. The UC1524 family was designed for switching regulators of either polarity, transformer-coupled dc-to-dc converters, transformerless voltage doublers and polarity converter applications employing fixed-frequency, pulse-width modulation techniques. The dual alternating outputs allow either single-ended or push-pull applications. Each device includes an on-chip reference, error amplifier, programmable oscillator, pulse-steering flip-flop, two uncommitted output transistors, a high-gain comparator, and current-limiting and shut-down circuitry. The UC1524 is characterized for operation over the full military temperature range of -55°C to +125°C. The UC2524 and UC3524 are designed for operation from -25°C to +85°C and 0° to +70°C, respectively.
BLOCK DIAGRAM
VREF 16 OSC OUT 3
VIN
15
REFERENCE REGULATOR +5V Q
+5V TO ALL INTERNAL CIRCUITRY
12
CA
RT CT (RAMP)
6 OSC 7 R Q 11 13 EA CB
INV INPUT NI INPUT GROUND (SUBSTRATE)
1 2
+5V EA
+5……
