UC3572DTR Texas Instruments - Yeehing Electronics

Negative output Flyback pulse width modulator including an undervoltage lockout circuit

Pricing (USD)

Quantity	Unit Price
1 — 99	3.717
100 — 249	3.257
250 — 999	2.283
1,000 +	1.29

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Switching Controllers
RoHS	Y
Number of Outputs	1 Output
Input Voltage	4.2 V to 35 V
Output Voltage	- 1 V to - 70 V
Output Current	500 mA
Minimum Operating Temperature	0 C
Maximum Operating Temperature	+ 70 C
Mounting Style	SMD/SMT
Package / Case	SOIC-8
Packaging	Reel
Series	UC3572
Type	Flyback Controller, PWM DC to DC Controller
Brand	Texas Instruments
Product Type	Switching Controllers
Factory Pack Quantity	2500
Subcategory	PMIC - Power Management ICs
Unit Weight	0.002561 oz

For more information, please refer to datasheet

Documents

UC3572DTR Datasheet

More Information

The UC3572 is a negative output flyback pulse width modulator which converts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external PMOS switch. The block diagram consists of a precision reference, an error amplifier configured for voltage mode operation, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver. The UC3572 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activity can occur, and a pulse-by-pulse current limit. Output current can be sensed and limited to a user determined maximum value. The UVLO circuit turns the chip off when the input voltage is below the UVLO threshold. In addition, a sleep comparator interfaces to the UVLO circuit to turn the chip off. This reduces the supply current to only 50uA, making the UC3572 ideal for battery powered applications.