Texas Instruments
UC3572DTR
UC3572DTR
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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.
