Texas Instruments TPS61162DYFFR

Overview

TPS61162DYFFR from Texas Instruments is a dual-channel white LED driver IC designed for smartphone backlighting with integrated 1.5-A/40-V MOSFET, 1.2-MHz boost switching, dual 30-mA current sinks, 1% typical current matching, and 90-mV headroom control - enabling efficient 7s2p WLED string operation from single-cell Li-ion (2.7 V–6.5 V).

For engineers reviewing the TPS61162DYFFR datasheet, TPS61162DYFFR pinout, TPS61162DYFFR application, or TPS61162DYFFR equivalent, key selection considerations include PWM/EasyScale dimming interface support, adaptive boost output voltage regulation, overvoltage protection thresholds (26.5 V SW OVP), thermal shutdown (160°C), and DSBGA-9 package compatibility with high-density mobile PCB layouts.

Technical Context

The TPS61162DYFFR implements current-mode PWM control with slope compensation to stabilize >50% duty cycles, using an internal transconductance error amplifier (30–80 µmho) and COMP pin compensation (330 nF). Its adaptive boost output dynamically tracks the higher of two IFBx feedback voltages to maintain regulation while minimizing headroom loss.

It supports dual functional modes: EasyScale one-wire digital dimming (9-bit code, 511 steps) initiated via EN pin timing detection window (100 µs delay, 260 µs low pulse within 1 ms), or fallback PWM dimming (40–100 kHz, up to 100:1 ratio) with logic-level EN/PWM inputs and built-in soft-start (5 ms half-current limit at 0.7 A).

Key Specifications

Pinout & Package

TPS61162DYFFR uses a 1.336 mm × 1.336 mm, 9-pin DSBGA (YFF) package optimized for space-constrained mobile applications. The bottom-side ball layout supports high-density routing and thermal dissipation through PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61162DYFFR, TPS61161DYFFT reduces channel count and feature set for simpler applications, while RT8542GQW offers alternate vendor sourcing but omits key protections and digital interface flexibility - making TPS61162DYFFR optimal for high-reliability dual-string smartphone backlighting.

Availability

TPS61162DYFFR is available at Aetrix Electronics and suitable for smartphone backlighting, tablet LCD drivers, GPS receiver displays, and handheld industrial terminals requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for TPS61162DYFFR 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 TPS61162DYFFR belongs to TI's WLED backlight driver product line, engineered specifically for high-efficiency, space-constrained smartphone and portable display applications with stringent current accuracy and fault resilience requirements.

FAQ

What is the recommended inductor value for TPS61162DYFFR?

The TPS61162DYFFR is optimized for a 4.7 µH inductor, as specified in the datasheet's Recommended Operating Conditions and Typical Application schematic. This value balances efficiency, size, and transient response across the 2.7–6.5 V input range. Inductors between 4.7 µH and 10 µH are supported, but deviation may affect peak current limits, loop stability, and EMI performance - always verify with bench testing using the exact TPS61162DYFFR layout and load conditions.

How does TPS61162DYFFR handle open LED string faults?

The TPS61162DYFFR detects open LED strings via its SW overvoltage protection (26.5 V typical threshold) and IFBx overvoltage protection (4.5 V typical). When one string opens, the boost output rises until either SW or IFBx OVP triggers, halting switching and disabling the affected current sink. If both strings open, SW OVP activates and latches the device off - requiring EN or VIN toggle to restart. This behavior is fully implemented in silicon and requires no external circuitry.

Can TPS61162DYFFR operate with only one LED string enabled?

Yes - TPS61162DYFFR supports single-string operation by grounding the unused IFBx pin (e.g., IFB2). During startup, the device detects the grounded pin and disables that channel, configuring the boost and regulation loop for the active string only. Both IFBx pins must not be grounded simultaneously, as this prevents startup. The remaining channel retains full 30-mA capability and 1% current accuracy.

What is the minimum PWM dimming frequency supported by TPS61162DYFFR?

The TPS61162DYFFR supports PWM dimming frequencies from 40 kHz to 100 kHz, as defined in Section 7.3 of the datasheet. Frequencies below 40 kHz risk audible noise from inductor vibration and may cause visible flicker; frequencies above 100 kHz reduce effective dimming resolution due to limited minimum pulse width. For optimal performance, use 40–50 kHz with ≥100:1 duty cycle range - verified in TPS61162DYFFR characterization data.

Does TPS61162DYFFR require external compensation components?

Yes - TPS61162DYFFR requires an external 330 nF capacitor connected between COMP and GND to stabilize the boost converter's feedback loop. This value is specified in the Recommended Operating Conditions table and validated in all TI reference designs. Omitting or deviating significantly from 330 nF risks loop instability, output voltage overshoot, or erratic current regulation - especially under fast load transients or low-input-voltage conditions.