UC3525BDWTR Texas Instruments - Yeehing Electronics

Enhanced 35V, Dual 0.4A 400KHz PWM controller with Low output when off, 0C to 70C

Pricing (USD)

Quantity	Unit Price
1 — 99	4.589
100 — 249	3.741
250 — 999	2.94
1,000 +	1.75

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Switching Controllers
RoHS	Y
Topology	Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Number of Outputs	2 Output
Switching Frequency	450 kHz
Duty Cycle - Max	50 %
Output Current	400 mA
Minimum Operating Temperature	0 C
Maximum Operating Temperature	+ 70 C
Mounting Style	SMD/SMT
Package / Case	SOIC-16
Packaging	Reel
Height	2.35 mm
Length	10.28 mm
Operating Temperature Range	0 C to + 70 C
Series	UC3525B
Type	Voltage Mode PWM Controllers
Brand	Texas Instruments
Fall Time	50 ns
Moisture Sensitive	Yes
Product Type	Switching Controllers
Rise Time	100 ns
Factory Pack Quantity	2000
Subcategory	PMIC - Power Management ICs
Unit Weight	0.016709 oz

For more information, please refer to datasheet

Documents

UC3525BDWTR Datasheet

More Information

The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for subnormal input voltages. This lockout circuitry includes approximately 500mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The UC1525B output stage features NOR logic, giving a LOW output for an OFF state. The UC1527B utilizes OR logic which results in a HIGH output level when OFF.