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Texas Instruments TPS61196PWPRQ1
- Part No.:
- TPS61196PWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61196PWPRQ1.pdf
- Description:
- IC LED DRVR CTRLR PWM 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,259
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Product details
Overview
TPS61196PWPRQ1 from Texas Instruments is an AEC-Q100 qualified 6-string automotive WLED driver IC with independent PWM dimming per string, 8–30 V input range, up to 120 V boost output, and ±1.5% current matching across strings. It integrates adaptive boost control, six 400-mA pulse-capable current sinks, and built-in protections including LED open/short, IFB short-to-ground, OVP, UVLO, and thermal shutdown - deployed in automotive LCD backlighting systems.
For engineers reviewing the TPS61196PWPRQ1 datasheet, TPS61196PWPRQ1 pinout, TPS61196PWPRQ1 application, or TPS61196PWPRQ1 equivalent, key selection criteria include its 100–800 kHz programmable switching frequency, 5000:1 PWM dimming resolution, 0.3–1 V programmable minimum IFB headroom voltage, and HTSSOP-28 thermal pad package for high-power LED driving in safety-critical automotive displays.
Technical Context
The TPS61196PWPRQ1 implements a current-mode boost controller with slope-compensated PWM regulation, where output voltage is dynamically adjusted to match the highest forward-voltage LED string plus required headroom at the IFB pin. Its error amplifier drives the COMP pin, requiring external RC compensation for loop stability.
Each of the six current sinks operates independently with programmable ISET-based current setting (50–400 mA), regulated IFB voltage (508 mV typical), and selectable minimum headroom via IFBV (0.3–1 V). PWM dimming inputs (PWM1–PWM6) accept 90 Hz–22 kHz signals with 10 µs minimum on-time, enabling flicker-free brightness control without altering boost output voltage during dimming off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8 V to 30 V - supports full automotive battery range including cold-crank and load-dump conditions. |
| Max Output Voltage | 120 V - enables driving long series strings of white LEDs in high-brightness automotive displays. |
| Switching Frequency | 100 kHz to 800 kHz - set by external resistor on FSW pin; higher frequencies reduce inductor size but increase switching loss. |
| Current Matching | ±1.5% between strings - ensures uniform luminance across multi-string LCD backlights without manual calibration. |
| PWM Dimming Resolution | Up to 5000:1 - achieves deep dimming down to 0.02% duty cycle while maintaining linearity and avoiding visible flicker. |
| IFB Headroom Range | 0.3 V to 1.0 V - adjustable via IFBV pin to optimize power dissipation and thermal performance for specific LED current settings. |
| OVP Threshold | Programmable via resistor divider on OVP pin - prevents overvoltage damage to LEDs and downstream circuitry. |
| UVLO Threshold | Programmable via resistor divider on UVLO pin - configurable start-up voltage (e.g., 9 V or 12 V) to avoid brown-out operation. |
Pinout & Package
TPS61196PWPRQ1 is housed in a thermally enhanced 28-pin HTSSOP (PWP) package measuring 9.70 mm × 4.40 mm with exposed thermal pad for efficient heat dissipation in high-current LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 UVLO | Input | Configurable undervoltage lockout threshold using resistor divider; default threshold 7 V with 300 mV hysteresis. |
| 2 EN | Input | Enable/disable control; logic high (>1.8 V) activates device with soft-start; logic low (<0.8 V) disables all outputs. |
| 3–8 PWM1–PWM6 | Input | Independent PWM dimming inputs per string; support 90 Hz–22 kHz frequency and 10 µs minimum pulse width. |
| 9 FBP | Output | LED cross-short protection threshold setting; resistor to GND programs detection level for parallel string faults. |
| 10 ISET | Output | Sets full-scale LED current via external resistor; 1.229 V reference enables precise current programming (50–400 mA). |
| 11 IFBV | Output | Programs minimum IFB headroom voltage (0.3–1.0 V); determines current sink compliance voltage and thermal margin. |
| 12–17 IFB1–IFB6 | Input | Feedback inputs for each current sink; regulated to IFBV voltage; used for LED open/short and cross-fault detection. |
| 18 AGND | Ground | Analog ground reference for precision feedback paths; must be separated from PGND for noise immunity. |
| 19 OVP | Input | Output overvoltage protection sense node; resistor divider from VOUT sets trip threshold (e.g., 115 V). |
| 20 COMP | Output | Error amplifier output; requires external RC network for boost loop compensation and transient stability. |
| 21 REF | Output | Soft-start timing and reference voltage source; capacitor value (1–4.7 µF) sets ramp time and controls inrush current. |
| 22 PGND | Ground | Power ground for MOSFET current sense and gate driver return; connects to external sense resistor and Schottky cathode. |
| 23 ISNS | Input | External MOSFET current sense positive input; monitors inductor current for overcurrent protection (400 mV threshold). |
| 24 GDRV | Output | Gate driver for external N-channel MOSFET; 2 Ω source / 1.5 Ω sink impedance supports fast switching up to 800 kHz. |
| 25 VDD | Output | Internal LDO output (6 V typical); powers internal circuitry; requires 1 µF ceramic bypass capacitor. |
| 26 FSW | Output | Switching frequency programming node; resistor to GND sets fSW from 100–800 kHz (e.g., 200 kΩ = 200 kHz). |
| 27 FAULT | Output | Open-drain fault indicator; pulls low during UVLO, OVP, thermal shutdown, LED open/short, or IFB short events. |
| 28 VIN | Input | Main power input; accepts 8–30 V with absolute max 33 V; supplies internal LDO and gate driver. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Output Voltage | Automatically tracks highest-string forward voltage + IFBV headroom - minimizes power loss and thermal stress across operating conditions. |
| Independent Per-String PWM Control | Enables dynamic local dimming and regional contrast enhancement in automotive cluster and infotainment displays. |
| Built-in LED Open/Short Protection | Detects open-circuit or shorted LED strings without external comparators - reduces BOM count and improves system reliability. |
| IFB Short-to-Ground Detection | Identifies failed current-sink FETs or PCB shorts at IFB pins - prevents unregulated current flow and potential LED damage. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C junction temperature with 15°C hysteresis - prevents thermal runaway during sustained high-current operation. |
| Programmable Soft-Start Time | Controlled by capacitor on REF pin (1–4.7 µF) - eliminates inrush current and avoids input voltage sag during startup. |
Applications
| Automotive LCD Backlighting | Automotive Cluster Displays |
|---|---|
Use Scenario: High-brightness edge-lit or direct-lit LCD panels in instrument clusters requiring uniform luminance and wide dimming range. IC Role / Device Role / Timing Role: 6-string WLED driver with independent PWM dimming per string and adaptive boost voltage control. Use Value: Enables AEC-Q100-compliant, flicker-free dimming from 0.02% to 100% duty cycle while maintaining ±1.5% current matching across strings. | Use Scenario: Digital gauge clusters with segmented or full-graphic TFT displays needing localized dimming zones and rapid brightness transitions. IC Role / Device Role / Timing Role: Independent PWM-controlled current sink per LED string, synchronized to display frame rate for zero-latency dimming updates. Use Value: Supports real-time local dimming algorithms with 5000:1 resolution, reducing power consumption and improving contrast ratio without software overhead. |
| Automotive Secondary Displays | Head-Up Display (HUD) Illumination |
Use Scenario: Center-stack infotainment screens and rear-seat entertainment displays operating across wide ambient temperature ranges (–40°C to +125°C). IC Role / Device Role / Timing Role: Automotive-grade WLED driver with integrated OVP, UVLO, thermal shutdown, and fault reporting via FAULT pin. Use Value: Eliminates need for external protection circuitry while ensuring ASIL-B compatible fault handling and diagnostic coverage. | Use Scenario: Projection-based HUDs requiring stable, low-noise LED current for consistent image brightness and color fidelity. IC Role / Device Role / Timing Role: Precision current regulator with <1.5% matching and programmable IFB headroom to minimize thermal drift in compact optical modules. Use Value: Maintains luminance stability over temperature and lifetime, critical for HUD safety-critical readability under varying sunlight conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMYX/NOPB | Single-string buck-boost LED driver; no integrated current sinks or multi-string PWM control; requires external MOSFET and sense resistors. | Targeted at single-zone lighting; lacks per-string dimming, IFB protection, or adaptive boost voltage tracking. | Choose when only one LED string is needed and board space allows discrete current regulation components. |
| TPS61165DRVR | 5-string WLED driver with shared PWM input (not per-string); lower max output voltage (40 V); no IFB short detection or cross-short protection. | Designed for non-automotive portable displays; lacks AEC-Q100 qualification, OVP programmability, and thermal shutdown hysteresis. | Consider only for cost-sensitive consumer displays where independent dimming and automotive reliability are not required. |
Compared with LM3409QMYX/NOPB and TPS61165DRVR, the TPS61196PWPRQ1 uniquely delivers six independently dimmable strings, AEC-Q100 qualification, adaptive boost voltage, and comprehensive fault diagnostics - making it the only option for ASIL-B compliant automotive multi-zone backlighting.
Availability
TPS61196PWPRQ1 is available at Aetrix Electronics and suitable for automotive LCD backlighting, instrument cluster displays, secondary infotainment screens, and HUD illumination requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for TPS61196PWPRQ1 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 company specializing in analog, embedded processing, and automotive ICs, with leadership in power management and LED driver technology.
The TPS61196PWPRQ1 belongs to TI's automotive-grade LED driver product line, designed specifically for high-reliability, multi-string LCD backlighting in safety-critical vehicle displays with stringent thermal, EMI, and functional safety requirements.
FAQ
What is the maximum continuous LED current per string supported by the TPS61196PWPRQ1?
The TPS61196PWPRQ1 supports 200 mA continuous output current per string, with 400 mA available in pulsed mode. This limitation is enforced by thermal design constraints of the HTSSOP-28 package and internal current-sink architecture. Continuous operation above 200 mA per string requires careful thermal management and may trigger thermal shutdown depending on ambient conditions and PCB layout. The datasheet specifies 200 mA as the rated continuous current to ensure reliable operation across the full –40°C to +125°C junction temperature range.
How does the TPS61196PWPRQ1 implement adaptive boost output voltage control?
The TPS61196PWPRQ1 continuously monitors the six IFB pin voltages and regulates the boost converter output to maintain just enough voltage to satisfy the string with the highest forward voltage plus the programmed IFBV headroom. This is achieved by feeding the minimum IFB voltage into the error amplifier's reference path, causing the boost controller to dynamically adjust VOUT rather than holding a fixed value. As a result, power dissipation in the current sinks is minimized, improving efficiency and thermal performance - especially critical in automotive environments where ambient temperatures exceed 85°C.
Can the TPS61196PWPRQ1 drive fewer than six LED strings, and how is this configured?
Yes, the TPS61196PWPRQ1 supports configurations with fewer than six strings. Unused IFB pins (e.g., IFB4–IFB6 when using only three strings) must be connected to AGND through a 20–36 kΩ resistor. During power-up, the device applies a 60 µA detection current to each IFB pin; if the resulting voltage falls between 1 V and 2.5 V, that string is automatically disabled from regulation. This method avoids floating inputs and ensures predictable startup behavior without requiring firmware or external logic to mask unused channels.
What protection features are integrated into the TPS61196PWPRQ1, and how do they respond to faults?
The TPS61196PWPRQ1 integrates LED open/short detection, IFB short-to-ground protection, output overvoltage (OVP), input undervoltage lockout (UVLO), thermal shutdown, and external MOSFET overcurrent sensing via ISNS. Most protections assert the open-drain FAULT pin low and latch off the device until power recycle or EN toggle. Thermal shutdown and UVLO include hysteresis (15°C and 300 mV respectively) to prevent oscillation near trip thresholds. IFB short detection triggers immediate shutdown to prevent excessive current through failed FETs or PCB traces.
Is the TPS61196PWPRQ1 pin-compatible with any other TI WLED drivers?
No, the TPS61196PWPRQ1 is not pin-compatible with other TI WLED drivers. Its 28-pin HTSSOP layout, dual ground separation (AGND/PGND), dedicated IFBx inputs, and unique pin functions (e.g., IFBV, FBP, REF for soft-start) differ significantly from alternatives like TPS61165 (20-pin VSON) or TPS61310 (16-pin WQFN). Substitution would require complete PCB redesign, new layout, and revalidation of thermal, EMI, and functional safety performance. Always verify pin mapping and signal routing before considering alternate parts.
TPS61196PWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- 120V
- Current - Output / Channel:
- 200mA
- Frequency:
- 800kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS61196PWPRQ1 FAQ
1.How can I place an order for TPS61196PWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61196PWPRQ1 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 TPS61196PWPRQ1 reliable?
The price and inventory of TPS61196PWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61196PWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS61196PWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61196PWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61196PWPRQ1?
TPS61196PWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61196PWPRQ1 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 TPS61196PWPRQ1?
For technical support, including TPS61196PWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61196PWPRQ1 requirements.
6.How does Aetrix verify that TPS61196PWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS61196PWPRQ1 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 TPS61196PWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS61196PWPRQ1?
All TPS61196PWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61196PWPRQ1, 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 TPS61196PWPRQ1 part is unused and in its original packaging.
Return procedure for TPS61196PWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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