Texas Instruments TPS65230A2DCAR

Overview

TPS65230A2DCAR from Texas Instruments is a highly integrated power management IC (PMIC) for digital set-top boxes, featuring one adjustable PWM buck controller (3.3–6.1 V, 500 kHz), two synchronous step-down regulators (0.9–3.3 V, 1 MHz, 3-A each), dual 100-mΩ USB power switches with overcurrent protection, and a dual-input supply voltage supervisor with brownout and thermal warning flags. It operates from a 10.8–22-V input and delivers stable multi-rail power in space-constrained consumer electronics.

For engineers reviewing the TPS65230A2DCAR datasheet, TPS65230A2DCAR pinout, TPS65230A2DCAR application, or TPS65230A2DCAR equivalent, key selection considerations include its I²C/parallel control flexibility, programmable current limit per buck, Type III compensation support, thermal shutdown at 160°C, and HTSSOP-48 package with integrated FETs for minimal external components.

Technical Context

The TPS65230A2DCAR integrates three independent DC-DC power stages: BUCK1 is a high-voltage PWM controller with external MOSFET drive (HDRV/LDRV), while BUCK2 and BUCK3 are fully integrated synchronous buck regulators with internal 32-mΩ/36-mΩ high-side and low-side FETs. All three rails support soft-start via shared SS pin and individual enable pins with 6-µA pull-up current and 1.2-V threshold.

Control is configurable via parallel I/O or I²C interface (address selectable via I2C_ADD pin); I²C mode enables register-based fault monitoring, power sequencing, and status reporting via INT/nRST and nBOR/nHOT open-drain outputs. Fault detection includes cycle-by-cycle overcurrent limiting, UVLO on VIN/VINB/VINU, and thermal warning at 120°C preceding full shutdown at 160°C.

Key Specifications

Pinout & Package

TPS65230A2DCAR is housed in a thermally enhanced 48-pin HTSSOP (DCA) package with exposed thermal pad for efficient heat dissipation in high-power-density applications such as satellite STBs and home gateways.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management IC applications.

Compared with TPS65230A2DCAR, TPS65231A2DCAR offers higher USB current capability without layout changes, while TPS65217CZQW provides broader system integration at the cost of STB-specific optimization and non-interchangeable packaging.

Availability

TPS65230A2DCAR is available at Aetrix Electronics and suitable for digital set-top boxes, xDSL modems, DVD players, and home gateway applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for TPS65230A2DCAR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on power efficiency and system integration.

The TPS65230 product line was designed specifically for multi-rail power delivery in broadband consumer equipment, integrating high-voltage buck control, dual synchronous converters, USB switches, and intelligent supervision in a single HTSSOP package.

FAQ

What is the maximum output current supported by each USB switch in the TPS65230A2DCAR?

The TPS65230A2DCAR integrates two USB power switches each rated for 0.5-A continuous output current (TPS65230 variant). This rating is confirmed in the Electrical Characteristics table under "IOC" with min/typ/max values of 0.6/0.8/1.0 A. The device enters hiccup-mode current limiting during overloads and asserts USBFLG1/USBFLG2 low to signal fault conditions. TPS65230A2DCAR does not support 1-A operation - that capability is exclusive to the TPS65231A2DCAR variant.

How does the TPS65230A2DCAR implement power-up sequencing between its three buck regulators?

The TPS65230A2DCAR implements power-up sequencing via dedicated EN_BCK1, EN_BCK2, and EN_BCK3 pins, each with an internal 6-µA pull-up current source and 1.2-V enable threshold. Connecting pins directly to V3P3 yields default sequence BUCK1 → BUCK2 → BUCK3 with ≥1-ms inter-rail delay. Custom sequencing is achieved by adding RC networks to EN pins, generating delays of 0.2 ms per 1-nF capacitance. The SS pin coordinates soft-start across all three rails, ensuring monotonic voltage ramp-up and preventing inrush current peaks.

Can the TPS65230A2DCAR operate without I²C communication enabled?

Yes, the TPS65230A2DCAR operates fully in parallel I/O mode without I²C. When the USBFLG2/nINT pin is pulled to ≤3.3 V (e.g., via 3.3-V resistor), I²C is disabled and all functions-including BUCK enable/disable, USB switch control, and fault flagging-are managed solely through dedicated EN and FLAG pins. No firmware or register access is required. I²C mode is optional and adds diagnostic visibility and dynamic reconfiguration but is not necessary for basic power delivery functionality in the TPS65230A2DCAR.

What thermal protection mechanisms are built into the TPS65230A2DCAR?

The TPS65230A2DCAR features two-tier thermal protection: an early warning flag (nBOR/nHOT low) activates at 120°C to alert the host processor, and full thermal shutdown occurs at 160°C with 20°C hysteresis. During shutdown, all BUCK regulators and USB switches are disabled, and EN_BCKx pins are discharged to ensure safe restart sequencing. Recovery is automatic once junction temperature falls below 140°C. These thresholds are fixed and not user-programmable, ensuring consistent behavior across operating conditions.

Does the TPS65230A2DCAR support adjustable switching frequency for its buck regulators?

No, the TPS65230A2DCAR has fixed switching frequencies: BUCK1 operates at 500 kHz, while BUCK2 and BUCK3 operate at 1 MHz. These values are specified in the Electrical Characteristics tables and are not adjustable via external components or registers. The 500-kHz frequency for BUCK1 accommodates higher input-to-output voltage ratios and larger inductor values, whereas the 1-MHz frequency for BUCK2/BUCK3 enables smaller magnetics for low-voltage, high-current rails-both optimized for STB power architecture without user tuning.