TPS92691 - Multi-Topology LED Driver | Texas Instruments
MPN: TPS92691 ✓ פעילTPS92691 סקירה
An LED driver is a power management IC that regulates the current flowing through one or more LEDs, ensuring consistent brightness and protecting the LEDs from current surges. The TPS92691 belongs to the family of switching LED drivers, which use inductive or capacitive energy storage to efficiently convert input voltage to the required LED current. This controller sits between the power source and the LED string, providing closed-loop regulation and dimming capabilities.
Key features of the TPS92691 include a wide input voltage range, programmable switching frequency up to 1 MHz, and a rail-to-rail current sense amplifier that allows low-side or high-side sensing. The device also features an internal 10-µA soft-start current source, an external soft-start capacitor for controlled startup, and a COMP pin that is clamped to the SS pin until LED current nears regulation. These features enable smooth startup and stable operation across varying load conditions.
The TPS92691 is available in a 16-pin HTSSOP (PWP) package, which provides a compact footprint with exposed thermal pad for improved heat dissipation. The device is designed for high-efficiency operation, with typical efficiencies above 90% in boost and buck configurations. It also includes protection features such as thermal shutdown and overcurrent protection, enhancing system reliability.
Typical applications include automotive LED headlights, daytime running lights, industrial LED lighting, and backlighting for displays. The device's flexibility in topology and dimming methods makes it a preferred choice for designers seeking a single controller for multiple LED driver designs.
When designing with the TPS92691, it is important to select appropriate external components such as the inductor, MOSFET, and sense resistor to meet the desired output current and efficiency. Proper PCB layout, including minimizing parasitic inductance and ensuring adequate thermal management, is critical for optimal performance.
חלופות תחליף ישיר עבור TPS92691 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם TPS92691 (אותו גורם צורה וטביעת רגל) — שונים ב Switching Frequency.
TPS92691QPWPTQ1
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←TPS92690
⚡ אותה מארזה📋 חלופה להתייחסות (לא בקטלוג)
TPS92692
⚡ אותה מארזה📋 חלופה להתייחסות (לא בקטלוג)
TPS92692-Q1
⚡ אותה מארזה📋 חלופה להתייחסות (לא בקטלוג)
LT3756
⚡ אותה מארזה ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
TPS92691 דירוגים מרביים ומאפיינים חשמליים
| טופולוגיה | Boost, Buck, SEPIC, Flyback |
| מספר יציאות | 1 |
| Dimming | Analog, PWM |
| תדר מיתוג | Programmable up to 1 MHz |
| Control Method | Fixed-frequency peak current mode |
| Current Sense Amplifier | Rail-to-rail |
| Soft-Start Current | 10 µA |
| מארז | 16-HTSSOP (PWP) |
| יעילות | >90% typical |
| Protection Features | Thermal shutdown, overcurrent protection |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של TPS92691
| פין 1 | COMP — Compensation pin |
| פין 2 | SS — Soft-start pin |
| פין 3 | ISENSE — Current sense input |
| פין 4 | GND — Ground |
| פין 5 | DRV — Gate drive output |
| פין 6 | VIN — Input supply |
| פין 7 | VCC — Internal regulator output |
| פין 8 | PWM — PWM dimming input |
| פין 9 | ADIM — Analog dimming input |
| פין 10 | REF — Reference output |
| פין 11 | ISENSE+ — Positive current sense |
| פין 12 | ISENSE- — Negative current sense |
| פין 13 | NC — No connect |
| פין 14 | NC — No connect |
| פין 15 | NC — No connect |
| פין 16 | NC — No connect |
יישומים טיפוסיים
TPS92691 מתאים עבור 6 יישוםs: Automotive LED Headlights, Industrial LED Lighting, Display Backlighting, General Lighting, Portable Lighting, Emergency Lighting.
Automotive LED Headlights
The TPS92691-Q1 is ideal for automotive LED headlights due to its AEC-Q100 qualification and support for boost and buck topologies. It provides accurate current regulation with a rail-to-rail sense amplifier, ensuring consistent brightness. The device's programmable switching frequency allows optimization for EMI, and its thermal shutdown protects against over-temperature. With over 90% efficiency, it minimizes power loss in the vehicle's electrical system.
מומלץ
Industrial LED Lighting
In industrial lighting, the TPS92691 supports SEPIC and flyback topologies, making it suitable for wide input voltage ranges. Its analog and PWM dimming capabilities allow precise brightness control. The device's fixed-frequency peak current mode control ensures stable operation across load variations. With a programmable switching frequency up to 1 MHz, designers can optimize for efficiency or size. The rail-to-rail current sense amplifier enables accurate sensing in high-side or low-side configurations.
מומלץ
Display Backlighting
For display backlighting, the TPS92691 provides efficient boost conversion for LED strings. Its PWM dimming allows high contrast ratios, essential for LCD panels. The device's soft-start feature prevents inrush current during startup, protecting LEDs. With a compact 16-HTSSOP package, it fits space-constrained designs. The programmable switching frequency helps avoid interference with display timing signals. According to TI, the TPS92691 achieves over 90% efficiency, reducing heat in backlight modules.
מומלץ
General Lighting
The TPS92691 is suitable for general lighting applications such as LED bulbs and fixtures. Its multi-topology support allows design flexibility for various input voltages. The device's analog dimming enables smooth light output control. With a rail-to-rail current sense amplifier, it maintains accurate current regulation. The internal 10-µA soft-start current source ensures gentle startup, extending LED lifespan. The device's high efficiency reduces energy consumption, meeting energy-saving requirements.
מומלץ
Portable Lighting
In portable lighting, the TPS92691's boost topology enables driving LEDs from a single-cell battery. Its low quiescent current extends battery life. The device's PWM dimming allows brightness control without color shift. The compact HTSSOP package is ideal for handheld devices. With programmable switching frequency, designers can optimize for efficiency or component size. The rail-to-rail current sense amplifier ensures accurate current sensing even at low battery voltages.
מומלץ
Emergency Lighting
The TPS92691 is well-suited for emergency lighting systems that require reliable operation. Its support for flyback topology allows isolation from the mains. The device's thermal shutdown and overcurrent protection enhance safety. With a wide input voltage range, it can handle battery voltage variations. The programmable soft-start prevents LED damage during power-up. According to TI, the device's high efficiency ensures longer battery backup time.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור TPS92691 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | TPS92691-Q1 | TPS92690 | TPS92692 |
|---|---|---|---|---|
| Package | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
| Pin Compatibility | Reference | Pin-compatible | Different pinout | Different pinout |
מבדילים עיקריים
- Automotive-grade variant available (לעומתTPS92690)
- Rail-to-rail current sense amplifier (לעומתTPS92692)
- Multi-topology support (לעומתLT3756)
הערות תכנון
For optimal performance, place the input capacitor, output capacitor, and sense resistor close to the TPS92691 pins. Minimize the loop area of the gate drive path to reduce parasitic inductance and EMI. Use a solid ground plane under the device and connect the exposed thermal pad to the ground plane for heat dissipation. Refer to the TI datasheet for recommended layout guidelines.
The TPS92691 in a 16-HTSSOP package has an exposed thermal pad. Ensure adequate copper area on the PCB to dissipate heat, especially in high-current applications. The thermal resistance depends on the PCB layout; a larger copper area reduces junction temperature. For high ambient temperatures, consider adding thermal vias to improve heat transfer to other layers.
Do not exceed the absolute maximum ratings for VIN and other pins. Ensure the soft-start capacitor is properly sized to prevent inrush current. The COMP pin must be compensated correctly to avoid instability. Use a sense resistor with appropriate power rating to handle the LED current. Verify the switching frequency setting does not cause EMI issues in your application.
מידע על תאימות
RoHS compliant per TI product page. AEC-Q100 qualified for TPS92691-Q1 variant.
