Texas Instruments TPS61193PWPRQ1

Overview

TPS61193PWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC with integrated boost/SEPIC DC-DC converter and three precision current sinks (100 mA/channel, 1% typical matching). It operates from 4.5 V to 40 V input, delivers up to 45 V output, supports 300 kHz–2.2 MHz switching with spread spectrum or external SYNC, and enables 10,000:1 dimming ratio at 100 Hz for LCD backlight systems in instrument clusters and HUDs.

For engineers reviewing the TPS61193PWPRQ1 datasheet, TPS61193PWPRQ1 pinout, TPS61193PWPRQ1 application, or TPS61193PWPRQ1 equivalent, key selection considerations include adaptive output voltage control based on LED headroom, open/short LED fault detection, thermal shutdown, internal LDO (4.3 V), and HTSSOP-20 package compatibility with automotive thermal and EMI requirements.

Technical Context

The TPS61193PWPRQ1 implements a current-mode boost/SEPIC controller with adaptive output voltage regulation-dynamically adjusting VOUT to the minimum required headroom across all three current sinks to minimize power loss. Its switching frequency is resistor-programmable (RFSET) from 300 kHz to 2.2 MHz and supports external synchronization or spread-spectrum modulation (±3%, 1 kHz) for AM-band EMI suppression.

Each of the three current sinks (OUT1–OUT3) is independently configurable via RISET, provides <0.7 V saturation voltage at 100 mA, and participates in real-time adaptive voltage control only when not grounded. Fault detection includes VIN OVP (42 V typ), UVLO (4 V), open/short LED sensing, and thermal shutdown (165°C typ) with 20°C hysteresis.

Key Specifications

Pinout & Package

TPS61193PWPRQ1 is housed in a thermally enhanced HTSSOP-20 package (6.50 mm × 4.40 mm) with exposed thermal pad (EP) for efficient PCB heat dissipation. Pin 1 is located at the top-left corner adjacent to the index mark; pins are numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with LP8861-Q1 and TPS61194-Q1, the TPS61193PWPRQ1 offers optimal balance of channel count, ultra-low standby current, and hardware-only PWM control - making it ideal for cost-sensitive, safety-critical automotive backlighting where deterministic timing and minimal BOM are priorities.

Availability

TPS61193PWPRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, heads-up displays, central information displays, and smart mirror backlighting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS61193PWPRQ1 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 automotive-grade power management solutions with over 50 years of automotive qualification experience.

The TPS61193PWPRQ1 belongs to TI's AEC-Q100 qualified LED driver product line, designed specifically for high-reliability automotive display backlighting where EMI robustness, thermal resilience, and functional safety compliance are mandatory.

FAQ

What is the maximum LED string voltage supported by the TPS61193PWPRQ1?

The TPS61193PWPRQ1 supports up to 45 V DC-DC output voltage, programmable via the FB resistive divider. This allows driving LED strings with combined forward voltages up to ~35 V (with 10 V headroom margin), making it suitable for multi-LED automotive backlight configurations. The adaptive voltage control continuously adjusts VOUT to the minimum required level, improving efficiency and thermal performance.

How does the TPS61193PWPRQ1 achieve 10,000:1 dimming ratio at 100 Hz?

The TPS61193PWPRQ1 achieves 10,000:1 dimming ratio at 100 Hz through hardware-based PWM control with sub-microsecond timing resolution: minimum on/off time is 0.5 µs, enabling precise duty-cycle control even at low frequencies. The output current directly mirrors the input PWM waveform without phase lag or distortion, preserving color fidelity and eliminating audible noise in sensitive automotive environments.

Can unused current sink outputs be left floating on the TPS61193PWPRQ1?

No - unused current sink outputs (OUT1, OUT2, or OUT3) on the TPS61193PWPRQ1 must be connected to GND to disable them. Floating outputs may cause unpredictable behavior, disrupt adaptive voltage control, and compromise open/short LED fault detection. Grounding unused channels excludes them from the headroom monitoring loop and ensures stable operation of active strings.

What thermal management provisions does the TPS61193PWPRQ1 include?

The TPS61193PWPRQ1 integrates thermal shutdown at 165°C (typical) with 20°C hysteresis and is packaged in an HTSSOP-20 with exposed thermal pad (EP) for low R_θJA (44.2°C/W). Designers must solder the EP to a large copper pour with multiple thermal vias to PCB ground plane. The device also features adaptive VOUT control to minimize power dissipation, reducing die temperature rise under varying LED load conditions.

Does the TPS61193PWPRQ1 support both boost and SEPIC topologies?

Yes - the TPS61193PWPRQ1 supports both boost and SEPIC DC-DC topologies via the same SW and PGND pins. SEPIC mode is enabled by adding a coupling capacitor between input and output; the controller automatically adapts its regulation loop. This dual-mode capability allows designers to select the optimal topology based on input/output voltage relationship and EMI requirements without changing ICs.