Texas Instruments TPS61163AYFFR

Overview

TPS61163AYFFR from Texas Instruments is a dual-channel white LED driver IC designed for smartphone backlighting with single-cell Li-ion battery input (2.7V–6.5V). It integrates a 1.5A/40V MOSFET, delivers up to 30mA per channel with 1% typical current matching, and features adaptive boost output with 90mV headroom control - enabling efficient driving of 10s2p WLED strings in compact handheld displays.

For engineers reviewing the TPS61163AYFFR datasheet, TPS61163AYFFR pinout, TPS61163AYFFR application, or TPS61163AYFFR equivalent, key selection considerations include its 37.5V OVP threshold (vs. 26.5V in TPS61162A), DSBGA-9 package constraints, EasyScale™ one-wire and PWM dual dimming interfaces, and thermal shutdown at 160°C with 15°C hysteresis.

Technical Context

The TPS61163AYFFR implements a fixed-frequency (1.2MHz) current-mode PWM boost controller with integrated low-side 1.5A/40V MOSFET and two precision current sinks. Its adaptive output regulation selects the lower IFBx voltage (min 90mV) to minimize headroom loss across mismatched LED strings.

It supports dual dimming modes: hardware PWM (up to 100:1 ratio, 10–100kHz) and 9-bit EasyScale™ one-wire digital interface via EN pin, with automatic mode detection at startup. Protection includes SW/IFBx overvoltage (37.5V OVP), pulse-by-pulse overcurrent limit (1.5A), and thermal shutdown (160°C).

Key Specifications

Pinout & Package

TPS61163AYFFR uses a 9-pin DSBGA (YFF) package with 0.4mm pitch and 1.5mm × 1.5mm footprint, optimized for ultra-thin mobile PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel WLED driver applications.

Compared with TPS61163AYFFR, TPS61162AYFFR offers identical functionality except for reduced OVP threshold - making it a direct alternative only when lower-voltage LED strings are used. RT8542GQW trades digital interface capability and precision for broader input range and lower BOM cost, requiring design validation for current matching and thermal performance in mobile form factors.

Availability

TPS61163AYFFR is available at Aetrix Electronics and suitable for smartphone backlighting, handheld GPS receivers, PDA displays, and media player LCDs requiring stable component supply across extended production lifecycles.

Supply support for TPS61163AYFFR 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 mobile power solutions.

The TPS6116xA family was engineered specifically for space-constrained, battery-powered mobile displays - delivering high-efficiency dual-channel LED driving with minimal external components and robust fault protection.

FAQ

What is the overvoltage protection (OVP) threshold for TPS61163AYFFR?

The TPS61163AYFFR has a 37.5V (typical) overvoltage protection threshold on the SW pin, as specified in the Electrical Characteristics table. This higher threshold than the TPS61162A (26.5V) allows safe operation with higher-forward-voltage LED strings or under transient voltage conditions. The IFBx pins also feature 4.5V OVP to detect LED short faults. Both protections latch off the device until reset via EN/PWM toggle or VIN power cycle.

How does TPS61163AYFFR achieve adaptive boost output voltage control?

The TPS61163AYFFR achieves adaptive boost output by continuously monitoring both IFB1 and IFB2 feedback voltages and regulating the lower of the two to 90mV (typical). This forces the boost converter to generate only the minimum voltage needed to maintain current in the higher-V_F string, reducing power loss in the current sinks. The error amplifier (COMP pin) adjusts duty cycle accordingly, enabling up to 90% efficiency even with mismatched LED forward voltages.

Can TPS61163AYFFR drive a single LED string, and how is the unused channel disabled?

Yes, TPS61163AYFFR can drive a single LED string by connecting the unused IFBx pin (e.g., IFB2) directly to GND. The device detects this condition during startup and disables that channel's current sink while maintaining full regulation on the active channel. If both IFB1 and IFB2 are grounded, the TPS61163AYFFR will not start up - ensuring fail-safe behavior. No additional configuration or register writes are required.

What are the key differences between PWM dimming and EasyScale™ dimming on TPS61163AYFFR?

PWM dimming on TPS61163AYFFR uses the dedicated PWM pin for 10–100kHz signals with up to 100:1 dimming ratio, while EasyScale™ uses pulse-coded commands on the EN pin for 9-bit (511-step) digital brightness control. EasyScale™ eliminates continuous PWM generation overhead, allowing the host MCU to enter deep sleep between updates. The TPS61163AYFFR auto-detects the interface at startup based on EN pin timing - no hardware modification is needed to switch modes.

What thermal protection features does TPS61163AYFFR include, and how do they behave?

The TPS61163AYFFR includes thermal shutdown that activates at 160°C junction temperature and releases at 145°C (15°C hysteresis). During shutdown, the boost switch and current sinks disable completely, halting all LED current. The device remains latched off until temperature falls below the hysteresis threshold, preventing rapid cycling. This behavior is fully integrated - no external thermal sensor or control logic is required. Thermal resistance (R_θJA) is 107°C/W in the YFF package, validated per JEDEC JESD51 standards.