Texas Instruments TPS61199PWPR

Overview

TPS61199 from Texas Instruments is a high-power, current-mode boost controller IC designed for LCD monitor and TV backlighting. It drives up to eight parallel LED strings with 70 mA per string, 3% current matching, adaptive output voltage regulation up to 60 V, and supports 8–30 V input. Used in large-format display power stages where precision dimming and thermal robustness are critical.

For engineers reviewing the TPS61199 datasheet, TPS61199 pinout, TPS61199 application, or TPS61199 equivalent, key selection criteria include PWM dimming ratio (5000:1 at 200 Hz), programmable switching frequency (300–800 kHz), integrated MOSFET gate driver (GDRV), LED open/short protection architecture, and dual-package availability (SO-20 and HTSSOP-20 with PowerPAD™).

Technical Context

The TPS61199 implements a current-mode PWM boost topology with adaptive output voltage control-dynamically adjusting V_OUT to match the highest forward-voltage LED string plus minimum IFB headroom. Its error amplifier output feeds the COMP pin, requiring external RC compensation for loop stability across load and input variations.

Protection is multi-layered: ISNS-based MOSFET overcurrent (160 mV threshold), OVP-clamped output regulation (2.95 V reference), FBP-programmable LED short-across detection, IFB overvoltage shutdown (29.5 V), and thermal shutdown at 150 °C with ~15 °C hysteresis. EN pin enables soft-start and UVLO (7 V turn-on, 300 mV hysteresis).

Key Specifications

Pinout & Package

TPS61199PWPR is packaged in a 20-pin HTSSOP (PWP) with exposed PowerPAD™ for enhanced thermal dissipation. The package measures 6.50 mm × 4.40 mm and requires soldering the PowerPAD to a ground plane with thermal vias for optimal junction-to-board thermal resistance (22.1 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61199, TPS61194RTVR reduces channel count and package size but retains identical dimming performance and protection features-ideal for cost-sensitive mid-tier displays. LM3409QMHX offers topology flexibility and AEC-Q100 qualification but demands additional external circuitry and firmware coordination for multi-string operation.

Availability

TPS61199PWPR is available at Aetrix Electronics and suitable for LCD monitor backlighting, LCD TV backlighting, and industrial display lighting requiring stable component supply, long-term manufacturability, and automotive-grade reliability validation.

Supply support for TPS61199PWPR 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 experience in display power solutions.

The TPS61199 belongs to TI's high-performance LED backlight controller product line, engineered specifically for large-format LCD displays demanding precision current regulation, adaptive voltage control, and robust fault handling in commercial and industrial environments.

FAQ

What is the maximum number of LED strings supported by the TPS61199?

The TPS61199 supports up to eight independent LED strings via its IFB1–IFB8 pins. Each string is regulated to a maximum of 70 mA with ±3% current matching. Unused IFB pins must be shorted to GND to disable corresponding current sinks during startup-no external resistors or jumpers are needed for configuration.

How is the switching frequency programmed on the TPS61199?

The TPS61199 switching frequency is set using an external resistor connected to the FSW pin. The relationship is defined as F_SW (kHz) = 80,000 / R₇ (kΩ). For example, a 160 kΩ resistor yields 500 kHz, while 100 kΩ sets 800 kHz. The device operates reliably between 300 kHz and 800 kHz, balancing EMI, efficiency, and inductor size.

Does the TPS61199 require an external MOSFET, and what type is recommended?

Yes, the TPS61199 requires an external N-channel MOSFET driven by its GDRV pin. The datasheet references the Si4480DY (30 V, 100 A, 3.2 mΩ) as a validated option. Any logic-level N-MOSFET with ≥100 A pulsed drain current, ≤5 mΩ R_DS(on), and adequate SOA for 60 V V_DS is suitable-TI provides layout guidelines for gate drive loop minimization.

What protection features does the TPS61199 include, and how are they configured?

The TPS61199 integrates six protection mechanisms: (1) ISNS-based MOSFET overcurrent (160 mV threshold), (2) OVP-clamped output regulation (via resistor divider on OVP pin), (3) FBP-programmable LED short-across detection, (4) IFB overvoltage shutdown (29.5 V), (5) thermal shutdown (150 °C), and (6) VIN UVLO (7 V). All except thermal and UVLO are configurable via external resistors.

Can the TPS61199 drive LED strings with different forward voltages simultaneously?

Yes-the TPS61199's adaptive output voltage architecture continuously adjusts V_OUT to match the string with the highest forward voltage plus required IFB headroom (typically ~450 mV). This ensures all strings receive adequate voltage while minimizing power loss across the boost stage, even with mixed LED binning or temperature drift.