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Texas Instruments TPS61500PWP
- Part No.:
- TPS61500PWP
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61500PWP.pdf
- Description:
- IC LED DRV RGLTR PWM 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,439
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Product details
Overview
TPS61500PWP from Texas Instruments is a monolithic high-brightness LED driver IC with an integrated 3-A, 40-V N-channel low-side power switch, operating from 2.9 V to 18 V input, regulating LED current via 200-mV FB reference, and supporting both analog and pure PWM dimming for up to 10-series 3-W LEDs in backlight and illumination systems.
For engineers reviewing the TPS61500PWP datasheet, TPS61500PWP pinout, TPS61500PWP application, or TPS61500PWP equivalent, key selection considerations include its programmable switching frequency (200 kHz–2.2 MHz), user-defined soft-start timing, 1.229-V OVP threshold with external resistor divider, thermal shutdown at 160°C, and HTSSOP-14 PowerPAD™ package for high-power LED drive reliability.
Technical Context
The TPS61500PWP implements current-mode PWM control with slope compensation to stabilize operation above 50% duty cycle, using an internal transconductance error amplifier (240–440 μmho) whose output drives the COMP pin for external RC compensation. Its oscillator frequency is set by a single resistor on FREQ, enabling precise trade-offs between solution size and efficiency.
It features dual dimming architecture: floating DIMC enables pure PWM dimming via EN pin (200 Hz–1 kHz), while a capacitor on DIMC configures analog dimming by modulating the 200-mV FB reference through an internal 25-kΩ filter resistor - eliminating audible noise without requiring logic-level matching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 18 V - supports multi-cell battery inputs (e.g., 3×Li-ion) and regulated 5 V/12 V rails without external pre-regulation. |
| Integrated Switch | 3-A, 40-V N-channel MOSFET with 0.13 Ω typical RDS(ON) at 3.6 V - enables direct drive of 4×3-W LEDs from 5 V or 8×3-W LEDs from 12 V. |
| FB Regulation Voltage | 200 mV ±5 mV - sets LED current via external sense resistor (e.g., 0.5 Ω yields 400 mA); accuracy directly determines LED current tolerance. |
| Switching Frequency | 200 kHz to 2.2 MHz - programmed by external resistor on FREQ pin; higher frequencies reduce inductor/capacitor size but lower peak efficiency (max 93%). |
| OVP Threshold | 1.229 V on OVP pin - used with external resistor divider to set custom overvoltage protection (e.g., 16 V for 4×LED string), with 40-mV hysteresis. |
| Soft-Start Control | SS pin accepts capacitor (e.g., 47 nF) charged by 6-μA internal current - limits inrush, eliminates output overshoot, and ensures controlled startup into full LED load. |
| Thermal Protection | 160°C shutdown with 15°C hysteresis - automatically disables switch and resumes after cooling; junction-to-board RθJB = 30.1°C/W in HTSSOP-14 PowerPAD™. |
Pinout & Package
TPS61500PWP is housed in a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad (PowerPAD™) soldered to AGND for enhanced thermal dissipation. The package supports >3 W continuous power delivery with RθJA = 45.2°C/W under standard JEDEC PCB conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.9–18 V; decoupled externally; tolerant of transient voltage exceeding VIN rail in boost configurations. |
| EN | Enable and PWM input | Logic-controlled enable (VENL = 0.4 V max); doubles as PWM signal input for pure dimming when DIMC is floating. |
| PGND (Pins 12–14) | Power ground return | Low-impedance path for switch source and Schottky cathode; must be separated from AGND except at single-point star ground. |
| AGND (Pin 7) | Analog ground reference | Reference for FB, COMP, DIMC, OVP, SS; isolated from PGND to minimize noise coupling into feedback loop. |
| DIMC (Pin 6) | Dimming mode selector | Capacitor connection enables analog dimming; floating enables pure PWM dimming - no external components needed for basic operation. |
| FREQ (Pin 10) | Frequency programming node | Connects to ground via resistor (e.g., 80 kΩ → 1.2 MHz); open-circuit prohibited - ensures stable oscillator operation. |
| COMP (Pin 8) | Error amplifier output | Drives external RC compensation network; clamped between 0.75 V and 3 V; defines loop stability and transient response. |
| SS (Pin 5) | Soft-start timing node | Charged by 6-μA internal current; 47-nF capacitor achieves full start-up in ~14 ms and eliminates output overshoot. |
| FB (Pin 9) | Current-sense feedback input | Regulated to 200 mV; connects to low-side current-sense resistor (R3); bias current <200 nA minimizes sensing error. |
| OVP (Pin 11) | Overvoltage protection input | 1.229-V internal reference; used with resistor divider to set output overvoltage trip point - protects LEDs and output capacitor. |
| SW (Pins 1–2) | Switch node | Connects to inductor and Schottky anode; carries high di/dt; requires tight layout and Kelvin routing to minimize EMI and losses. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-A, 40-V power switch | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area while maintaining 93% peak efficiency at 4-LED load. |
| Programmable soft-start | SS pin allows precise inrush current limiting - critical for reliable startup into capacitive LED loads without triggering input UVLO or OCP. |
| Dual dimming architecture | Hardware-selectable analog (via DIMC cap) or pure PWM (via EN) dimming - supports noise-sensitive displays and color-stable lighting without firmware overhead. |
| Current-mode PWM with slope compensation | Stabilizes control loop across wide duty-cycle range (up to 93%), preventing subharmonic oscillation in high-step-up LED boost applications. |
| Programmable overvoltage protection | OVP pin + resistor divider enables system-level fault protection - shuts down SW if LED string opens or FB shorts, preventing capacitor overvoltage failure. |
Applications
| Monitor Backlight | Industrial LED Lighting |
|---|---|
|
Use Scenario: Driving 4–8 series-connected 3-W white LEDs in 15–27-inch LCD monitors powered from 5 V or 12 V rails. IC Role / Device Role / Timing Role: High-efficiency boost LED driver with analog dimming for flicker-free brightness control and thermal foldback during sustained high-luminance operation. Use Value: Delivers >90% efficiency at 400 mA per string, enabling compact heatsinkless designs while meeting IEC 62471 photobiological safety requirements. |
Use Scenario: Powering ruggedized 3-W LED arrays in factory floor signage, machine vision illuminators, or outdoor control panels with 12 V DC input. IC Role / Device Role / Timing Role: Robust LED current regulator with UVLO (2.7 V), thermal shutdown (160°C), and OVP - ensuring fail-safe operation in unregulated industrial environments. Use Value: Maintains constant LED current despite input ripple or temperature drift, extending LED lifetime beyond 50,000 hours under continuous operation. |
| Automotive Interior Lighting | Medical Device Illumination |
|
Use Scenario: Controlling ambient and accent lighting in automotive cabins using 12 V battery supply with cold-crank tolerance down to 2.9 V. IC Role / Device Role / Timing Role: LED driver with undervoltage lockout hysteresis (130 mV) and EN pin logic compatibility - immune to start-stop system voltage dips. Use Value: Enables seamless dimming transitions during engine cranking without visible LED flicker or reset events, meeting OEM EMC Class 3 requirements. |
Use Scenario: Precision illumination in surgical headlamps or diagnostic endoscopes requiring stable, silent, and color-accurate LED output. IC Role / Device Role / Timing Role: Analog dimming LED driver with no audible coil whine - uses internal RC filtering (DIMC + 25 kΩ) instead of PWM current chopping. Use Value: Eliminates 200 Hz–20 kHz PWM-induced acoustic noise that interferes with sensitive audio equipment or patient comfort in clinical settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HVMM/NOPB | Adjustable current limit (0.2–5 A), fixed 500-kHz frequency, no integrated OVP or analog dimming - requires external comparator for overvoltage protection. | Best suited for cost-sensitive industrial LED drivers where fixed-frequency simplicity outweighs programmability needs. | Select LM3409HVMM/NOPB when board space permits discrete OVP implementation and analog dimming is not required. |
| TPS92692QPWPRQ1 | Automotive-grade AEC-Q100 qualified, integrated high-side current sense, 0.5% FB accuracy, but only 2.5-A switch and no DIMC-based analog dimming. | Targeted at ASIL-B automotive lighting modules requiring functional safety compliance and tighter current regulation. | Choose TPS92692QPWPRQ1 for automotive front-lighting or DRL where AEC-Q100 qualification and 0.5% current accuracy are mandatory. |
Compared with LM3409HVMM/NOPB and TPS92692QPWPRQ1, the TPS61500PWP uniquely combines 3-A/40-V integration, hardware-selectable dimming modes, and programmable OVP in a single HTSSOP-14 package - making it optimal for non-automotive high-brightness LED systems demanding flexibility, efficiency, and rapid time-to-market.
Availability
TPS61500PWP is available at Aetrix Electronics and suitable for monitor backlight, industrial LED lighting, and automotive interior lighting applications requiring stable component supply, long-term manufacturability, and TI's production-grade reliability assurance.
Supply support for TPS61500PWP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability LED driver design and automotive-grade IC development.
The TPS61500PWP belongs to TI's high-brightness LED driver product line, engineered specifically for efficient, thermally robust, and dimming-flexible driving of 1-W and 3-W LED strings in display, industrial, and transportation applications.
FAQ
What is the maximum number of 3-W LEDs the TPS61500PWP can drive in series?
The TPS61500PWP can drive up to 10 series-connected 3-W LEDs - demonstrated at 8 LEDs from 12 V input and 4 LEDs from 5 V input in TI's production-tested reference designs. Output voltage capability is limited by the 40-V internal switch rating and OVP configuration; with proper OVP resistor selection and thermal management, 10-LED strings (e.g., 35 V total VF) operate reliably within datasheet specifications.
How does the TPS61500PWP implement analog dimming without audible noise?
The TPS61500PWP implements analog dimming by connecting a capacitor (≥0.1 μF) to the DIMC pin, which forms an RC filter with an internal 25-kΩ resistor. This filters the external PWM signal to generate a smooth DC reference voltage that scales the 200-mV FB regulation point - modulating LED current continuously rather than pulsing it, thereby eliminating coil whine and capacitor squeal common in pure PWM schemes.
Can the TPS61500PWP operate from a 24-V input rail?
No - the TPS61500PWP has a maximum absolute-rated VIN of 20 V and recommended operating VIN up to 18 V. Applying 24 V exceeds both limits and risks permanent damage. For 24-V input LED applications, TI recommends the TPS92630 or TPS92682 families, which support up to 65-V input and integrate similar dimming and protection features.
What is the purpose of separating AGND and PGND pins on the TPS61500PWP?
AGND (Pin 7) serves as the quiet analog reference for FB, COMP, DIMC, OVP, and SS - minimizing noise coupling into the feedback loop. PGND (Pins 12–14) handles high di/dt return current from the power switch and Schottky diode. Separating them prevents switching noise from corrupting current-sense accuracy and loop stability; they must connect only at a single-point star ground near the IC.
Does the TPS61500PWP support synchronous rectification?
No - the TPS61500PWP uses an external Schottky diode (e.g., SS3P6L-E3/86A) in its boost topology and does not integrate or support a synchronous MOSFET replacement for the diode. Its control architecture is optimized for diode-based operation, and no gate-drive signals or timing provisions for a synchronous FET are provided in the pinout or functional description.
TPS61500PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- 2.9V ~ 38V
- Current - Output / Channel:
- 3A (Switch)
- Frequency:
- 200kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS61500PWP FAQ
1.How can I place an order for TPS61500PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61500PWP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS61500PWP reliable?
The price and inventory of TPS61500PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61500PWP is usually 5 days.
3.What payment methods are accepted for TPS61500PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61500PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61500PWP?
TPS61500PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61500PWP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS61500PWP?
For technical support, including TPS61500PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61500PWP requirements.
6.How does Aetrix verify that TPS61500PWP is sourced from the original manufacturer or authorized distributors?
All TPS61500PWP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS61500PWP meets industry standards.
7.What is the process for return or replacement of TPS61500PWP?
All TPS61500PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS61500PWP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS61500PWP part is unused and in its original packaging.
Return procedure for TPS61500PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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