TPS61194PWPRQ1 - 4-Ch 100mA Automotive LED Driver | TI
MPN: TPS61194PWPRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.85 | $28.50 |
| 100 | $2.4 | $240.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.72 | $1,720.00 |
TPS61194PWPRQ1 Overview
An LED driver with current sinks is a power-management IC that regulates current through LED strings rather than setting a fixed voltage; this keeps luminous intensity constant despite temperature-induced forward-voltage variations. The TPS61194PWPRQ1 sits in the LED-driver sub-category of power management ICs (hypernyms: LED driver -> lighting PMIC -> power management IC -> semiconductor), and is purpose-built for backlighting and accent-lighting rails inside vehicles.
Key features include an adjustable switching frequency of 300 kHz to 2.2 MHz (sync input), spread-spectrum frequency modulation for EMI reduction, adaptive output voltage control driven by current-sink headroom, PWM dimming, and AEC-Q100 qualification. The device also integrates fault detection (open-LED, short-LED, thermal shutdown, and input under-voltage lockout) to meet automotive safety diagnostics.
Typical applications include automotive infotainment display backlighting, instrument-cluster illumination, HUD projection, RGB ambient lighting, and small-to-medium TFT-LCD backlight drivers. The wide input range and SEPIC option allow the same part to drive LED strings whose forward voltage is either below or above the battery rail.
When designing with the TPS61194PWPRQ1, place the input bypass capacitor and inductor as close to the SW pin as possible, keep the LED-current-setting resistors within 1% tolerance, and leave adequate copper area under the PowerPAD for thermal dissipation. Frequency selection should avoid the AM radio band (530 kHz to 1710 kHz) by using either below-band or above-band switching.
This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives, and practical EMI design notes not found in the manufacturer datasheet alone, helping automotive lighting engineers shorten the BOM-down and EMC-compliance cycle.
Drop-in alternatives for TPS61194PWPRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS61194PWPRQ1 (same form factor and footprint) — differing in Dimming Method, MSL Level, Operating Temperature Range, Package, Switching Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS61194PWPR
✅ Drop-In✓ In Stock
$1.61 / Unit
View Datasheet →TPS61194PWP
✅ Drop-In📋 Reference alternative (not in catalog)
TPS61193PWPR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS61196PWPR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS61195PWP
✅ Drop-In📋 Reference alternative (not in catalog)
TPS61194PWPRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Boost, SEPIC |
| Number of LED Channels | 4 |
| Per-Channel LED Current | 100 mA |
| Input Voltage Range | 4.5 V to 40 V |
| Switching Frequency | 300 kHz to 2.2 MHz (adjustable, sync input) |
| Dimming Method | PWM dimming |
| Package | HTSSOP-20 (PWP) with PowerPAD |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +125 °C |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| EMI Reduction | Spread-spectrum frequency modulation + external sync |
| Fault Protection | Open-LED, short-LED, thermal shutdown, UVLO |
| Output Voltage Control | Adaptive based on current-sink headroom voltage |
| MSL Level | 2 (1 year floor life) |
| RoHS Status | Compliant |
TPS61194PWPRQ1 Pin Configuration
| Pin 1 | VIN — Input supply voltage (4.5 V to 40 V) |
| Pin 2 | EN — Device enable (active high) |
| Pin 3 | UVLO — Under-voltage lockout threshold set |
| Pin 4 | RT — Timing resistor for switching frequency |
| Pin 5 | SYNC — External frequency synchronization input |
| Pin 6 | SS — Soft-start capacitor |
| Pin 7 | COMP — Boost converter compensation network |
| Pin 8 | FB — Boost converter feedback / adaptive headroom |
| Pin 9 | SW — Boost switch node (inductor connection) |
| Pin 10 | PGND — Power ground (PowerPAD internally connected) |
| Pin 11 | VOUT — Boost converter output (LED anode rail) |
| Pin 12 | ISET — LED current programming resistor |
| Pin 13 | PWM — PWM dimming input |
| Pin 14 | IOUT1 — LED current sink channel 1 (100 mA) |
| Pin 15 | IOUT2 — LED current sink channel 2 (100 mA) |
| Pin 16 | IOUT3 — LED current sink channel 3 (100 mA) |
| Pin 17 | IOUT4 — LED current sink channel 4 (100 mA) |
| Pin 18 | AGND — Analog ground |
| Pin 19 | FLT — Fault flag output (open-drain) |
| Pin 20 | THERMAL_PAD — PowerPAD exposed pad - tie to PGND |
Typical Applications
TPS61194PWPRQ1 is suitable for 6 applications: Automotive Infotainment Display Backlight, Instrument Cluster Illumination, Automotive HUD Projection Backlight, RGB Ambient Interior Lighting, Automotive Rear-Seat Entertainment Display, Industrial TFT-LCD Backlighting.
Automotive Infotainment Display Backlight
The TPS61194PWPRQ1's 4 independent 100 mA current sinks directly drive the four parallel LED strings of a 7-10 inch automotive infotainment TFT-LCD. With 4.5 V to 40 V input, the device survives cold-crank and load-dump transients on the automotive battery rail, while adaptive output-voltage control minimizes power dissipation by trimming the boost voltage to the minimum headroom required by the LED strings. AEC-Q100 qualification allows direct use in dash-mounted displays, and spread-spectrum switching plus an external sync pin keep EMI below the AM-radio band for in-cabin radio coexistence.
Recommended
Instrument Cluster Illumination
Driving the backlight of a digital instrument cluster requires tight current matching across multiple LED strings to keep brightness uniform across the dial. The TPS61194PWPRQ1's 4 matched current sinks with adaptive headroom control maintain intensity within a few percent across the full -40 °C to +125 °C automotive range. The 300 kHz to 2.2 MHz adjustable switching frequency combined with spread-spectrum modulation keeps the part below CISPR 25 Class 5 EMI limits without additional shielding. PWM dimming at 200 Hz to 20 kHz enables smooth brightness transitions for day/night modes.
Recommended
Automotive HUD Projection Backlight
Head-up displays require extremely uniform, flicker-free LED backlighting to prevent driver-visible artifacts on the projected image. The TPS61194PWPRQ1 delivers 100 mA per channel with sub-1% current matching, allowing four parallel high-brightness LEDs to illuminate the HUD LCD without visible banding. The device's wide 4.5 V to 40 V input tolerance absorbs start-stop voltage dips on the vehicle bus, while the AEC-Q100 qualification and integrated short-LED/open-LED diagnostics support ISO 26262 functional-safety requirements for driver-information systems.
Recommended
RGB Ambient Interior Lighting
Multi-zone RGB ambient lighting uses independent current sinks per color string to mix color temperature and intensity. The TPS61194PWPRQ1's 4 channels drive one RGB module plus a separate white string per zone; the PWM dimming input enables 16-bit color mixing at low frequency for flicker-free transitions. With automotive-grade EMI suppression via spread-spectrum and AEC-Q100 qualification, the device is suitable for door-panel, footwell, and dashboard-trim ambient lighting in mid- and high-end vehicles.
Recommended
Automotive Rear-Seat Entertainment Display
Rear-seat entertainment (RSE) LCD panels need 4-channel LED backlighting for uniform brightness over a wide input-voltage range. The TPS61194PWPRQ1's SEPIC topology option allows the boost converter to handle LED strings whose total forward voltage may exceed the 12 V battery rail, supporting larger panel sizes. The 4.5 V to 40 V input window tolerates engine cranking and load-dump events, while the HTSSOP-20 PowerPAD package dissipates the boost-converter heat efficiently in the constrained RSE enclosure.
Recommended
Industrial TFT-LCD Backlighting
For industrial HMIs, test equipment displays, and outdoor kiosks, the TPS61194PWPRQ1 drives four parallel LED strings with precise current matching and -40 °C to +125 °C operation. Although AEC-Q100 qualified for automotive use, the same robustness suits harsh industrial environments with wide temperature swings and noisy 24 V supply rails. The SEPIC topology option supports LED strings above 24 V total forward voltage for high-brightness outdoor panels. PWM dimming allows brightness adjustment based on ambient-light sensors.
Recommended
Recommended Products Summary
Engineering reference data for TPS61194PWPRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS61194PWPR | TPS61194PWP | TPS61193PWPR | LP8863QRHBRQ1 | TPS61196PWPR | TPS61195PWP |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) | VQFN-20 (RHB) | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) |
| Number of LED Channels | 4 | 4 | 4 | 3 | 4 | 6 | 4 |
| Per-Channel LED Current | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | 60 mA |
| Input Voltage Range | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V | 3 V to 30 V | 4.5 V to 40 V | 4.5 V to 40 V |
| Switching Frequency | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz | 100 kHz to 2.2 MHz | 300 kHz to 2.2 MHz | 300 kHz to 2.2 MHz |
| AEC-Q100 Qualified | Yes | No (industrial) | No (industrial) | No (industrial) | Yes | No (industrial) | No (industrial) |
| EMI Reduction (Spread Spectrum) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Approx. Unit Price @ 1000 pcs | USD 1.72 | USD 1.55 (approx.) | USD 1.50 (approx.) | USD 1.65 (approx.) | USD 2.40 (approx.) | USD 1.85 (approx.) | USD 1.45 (approx.) |
Key Differentiators
- Only HTSSOP-20 LED driver with 4 × 100 mA channels + AEC-Q100 + spread spectrum (vs TPS61193PWPR)
- Lower current per channel than TPS61194PWPRQ1 (vs TPS61195PWP)
- Fewer channels than TPS61194PWPRQ1 (vs TPS61196PWPR)
Design Notes
Select the TPS61194PWPRQ1 switching frequency either above 2.1 MHz or below 500 kHz to avoid the AM radio band (530 kHz to 1710 kHz) per the TI datasheet's EMI guidance. Use the SYNC pin to lock the switching frequency to a system clock and dither the switching node; combine this with spread-spectrum modulation enabled in register settings to reduce conducted and radiated emissions below CISPR 25 Class 5 limits.
Estimated: at VIN = 12 V, VLED = 24 V (boost), 4 channels × 80 mA = 320 mA total, the TPS61194PWPRQ1 dissipates approximately 3.8 W. The HTSSOP-20 PowerPAD has theta_JA around 35 °C/W on a 4-layer JEDEC test board, yielding a junction temperature rise of 133 °C above ambient. Mount the exposed PowerPAD to at least 1 square inch of copper pour on top and inner PCB layers with thermal vias for reliable operation at full automotive temperature.
Place the input bypass capacitor (1 µF X7R minimum, 4.7 µF recommended for 40 V load-dump) within 2 mm of the VIN pin and AGND. Keep the SW-node copper area minimal to reduce radiated EMI, and route the boost inductor and Schottky diode directly to the SW and VOUT pins with short, wide traces. The FB and COMP traces must be kept away from the SW node to avoid noise injection into the boost control loop.
Do not leave the ISET pin floating - this disables the current sinks and the output voltage may rise to its over-voltage threshold. Use 1% tolerance resistors for ISET to maintain per-channel current matching within 3%. Ensure the EN pin has a defined logic level; if unused, tie EN to VIN through a 100 kΩ resistor to guarantee the device starts up reliably under all input-voltage conditions.
Compliance Information
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per TI product page. Halogen-free and lead-free per package materials declaration.
