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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Texas Instruments TPS65642AYFFR

Name: TPS65642AYFFR
Brand: Texas Instruments
SKU: TPS65642AYFFR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS65642AYFFR

Manufacturer:: Texas Instruments

Category:: Special Purpose Regulators

Package:: 56-UFBGA, DSBGA

Datasheet:: TPS65642AYFFR.pdf

Description:: IC REG CONV TFT LCD 5OUT 56DSBGA

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Product details

Overview

TPS65642AYFFR from Texas Instruments is a highly integrated LCD bias power management IC for notebook and tablet PCs. It integrates two synchronous boost converters (AVDD up to 10.1 V, VGH up to 40 V), two synchronous buck converters (VCORE: 1.0–1.3 V/600 mA, VIO1: 1.7–2.5 V/200 mA), one LDO (VIO2: 1.7–1.8 V/200 mA), 14-channel 10-bit programmable gamma correction, programmable VCOM calibrator with dual buffers, gate voltage shaping, and I²C interface - all in a single 56-ball DSBGA package.

For engineers reviewing the TPS65642AYFFR datasheet, TPS65642AYFFR pinout, TPS65642AYFFR application, or TPS65642AYFFR equivalent, this device addresses critical system-level requirements including panel discharge (XAO), system reset generation (RST), thermal shutdown (120–180°C), EEPROM-based configuration storage, and support for both GIP and non-GIP LCD displays.

Technical Context

The TPS65642AYFFR implements a multi-rail power architecture optimized for LCD timing and biasing: AVDD powers gamma reference and source drivers; VGH supplies gate drivers with temperature-compensated output and optional external cascode support above 36 V; VCORE and VIO1 deliver core logic and I/O voltages with soft-start and undervoltage protection; VIO2 provides auxiliary supply when VIO1 = 2.5 V. All rails feature independent enable, fault monitoring, and programmable sequencing via I²C.

Its gamma correction block delivers ±100 µA per channel into 50 pF loads with <±3.6 LSB INL and <±1.5 LSB DNL; the VCOM calibrator uses an internal 50 µA current source and supports two independent op-amps with 70–91 dB open-loop gain, 25–38 V/µs slew rate, and <±15 mV input offset - enabling precise, low-drift common-mode voltage generation for active matrix displays.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.6 V to 6 V - supports single-cell Li-ion or regulated 3.3 V/5 V system rails without external pre-regulation.
AVDD Output	7 V to 10.1 V / 700 mA (VIN ≥ 4 V) - powers gamma reference and source driver ICs with ±1% regulation tolerance.
VGH Output	16 V to 40 V / 40 mA - drives gate lines with programmable shaping, thermistor compensation, and external cascode support beyond 36 V.
VCORE Output	1.0 V to 1.3 V / 600 mA - supplies processor or display controller cores with ±3% accuracy and 0.5–4 ms soft-start.
Gamma Channels	14 × 10-bit DACs - enables fine-grained grayscale correction across full display brightness range with <±25 mV offset error.
I²C Address	0x74 (config), 0x4F (VCOM) - allows concurrent configuration of power rails and VCOM calibration without address conflict.
Package	56-ball DSBGA, 3.16 mm × 3.45 mm, 0.4 mm pitch - ultra-compact footprint for space-constrained portable display designs.
Thermal Shutdown	120°C to 180°C threshold - protects against sustained overloads while permitting transient high-power operation during panel startup.

Pinout & Package

TPS65642AYFFR uses a 56-ball, 0.4-mm-pitch DSBGA (YFF) package with exposed thermal pad on bottom side. Pin assignment follows JEDEC MO-220 standard with dedicated ground balls (A1, A5, A7, C2, G1, G3, G7, H2, H3) and functional grouping for power, control, and analog outputs.

Pin/Terminal	Circuit Role	Design Meaning
AVDD (B7, F4, G5, H5)	Gamma reference & VCOM supply input	Provides regulated input to 14-channel gamma DACs and dual VCOM amplifiers; must be stable before gamma/VCOM programming.
VGH (F1)	VGH output sense	Feedback node for boost converter 2; connects internally to gate driver supply rail and enables closed-loop regulation up to 40 V.
RSET (C7)	VCOM calibration current reference	Sets 50 µA reference current for VCOM zero/full-scale calibration; resistor value determines VCOM output range precision.
RE (D1)	Gate voltage shaping discharge path	Connects to external resistor to control VGHM discharge timing during panel power-down; critical for flicker reduction in GIP displays.
XAO (B4)	Panel discharge signal	Open-drain output that asserts low to discharge LCD panel capacitance prior to power-off; synchronized with power sequencing timers.
RST (B5)	System reset generator	Push-pull output delivering 2–16 ms pulse after VCORE ramp completion; ensures clean digital subsystem initialization.
SCL/SDA (E2/D2)	I²C interface	Standard-mode (100 kHz) and fast-mode (400 kHz) bidirectional bus for configuring all rails, gamma tables, VCOM offsets, and timing delays.

Key Features

Feature	Design Value
Integrated gamma correction	14 independent 10-bit DACs with ±100 µA sourcing/sinking capability and <±25 mV offset - eliminates need for external gamma ICs and reduces BOM count by ≥3 components.
Programmable VCOM calibrator	Dual rail-to-rail op-amps with 50 µA set-current, <±15 mV offset, and 70–91 dB open-loop gain - enables sub-10 mV VCOM accuracy across temperature without trimming.
Gate voltage shaping	VGHM output with FLK-controlled switching and RE-based discharge timing - reduces visual flicker in GIP displays by synchronizing gate driver turn-off with data latch timing.
On-chip EEPROM with write protect	1000-cycle endurance, 100 ms write time, hardware WP pin - stores gamma tables, VCOM offsets, and sequencing parameters across power cycles without host MCU intervention.
Multi-rail power sequencing	Configurable tDLY1 (0–70 ms), tDLY6 (0–35 ms), tSS1 (0.5–4 ms), tSS2 (4–7.5 ms) - ensures safe startup/shutdown order for VCORE → VIO1 → AVDD → VGH → XAO/RST in complex display systems.
Thermistor-compensated VGH	TCOMP pin accepts NTC network to adjust VGH output vs. temperature - maintains consistent gate drive strength across –40°C to +85°C ambient without firmware compensation.

Applications

Notebook PC Display Power	Tablet PC LCD Bias
Use Scenario: Powering 13.3"–15.6" HD/Full HD LCD panels with integrated source/gate drivers and touch controller. IC Role / Device Role / Timing Role: Single-chip bias solution generating AVDD (8.4 V), VGH (24 V), VCORE (1.1 V), VIO1 (1.8 V), and VIO2 (1.8 V); manages XAO discharge and RST assertion during sleep/wake transitions. Use Value: Reduces PCB area by >40% vs. discrete DC/DC + gamma IC solutions; eliminates external gamma resistor networks and VCOM trim pots.	Use Scenario: Driving 7"–10.1" IPS LCDs in battery-powered tablets requiring low quiescent current and robust thermal management. IC Role / Device Role / Timing Role: Provides sequenced, temperature-compensated bias rails with I²C-configurable gamma tables and VCOM offsets; enables dynamic gamma tuning based on ambient light sensor input. Use Value: Achieves <1.9 mA VIN quiescent current in shutdown mode; thermal shutdown (120–180°C) prevents damage during sustained backlight-on operation.
Monitor Display Subsystem	GIP-Based Industrial Display
Use Scenario: Supporting 21.5"–27" commercial monitors with high-resolution timing controllers and dual-scan gate drivers. IC Role / Device Role / Timing Role: Delivers high-current AVDD (700 mA) and VGH (40 mA) with low-output-ripple design; uses tDLY6 delay to synchronize XAO discharge with vertical blanking interval. Use Value: Meets EN55032 Class B EMI limits without additional filtering; gamma INL <±3.6 LSB ensures color fidelity across 1000:1 contrast ratio.	Use Scenario: Enabling flicker-free operation in medical or industrial GIP (Gate-in-Panel) displays where gate line timing must match pixel data latching. IC Role / Device Role / Timing Role: Generates VGH with FLK-synchronized VGHM shaping and RE-controlled discharge; uses programmable tDLY6 to align XAO assertion with gate driver reset cycle. Use Value: Eliminates visible horizontal banding during scrolling; VGHM propagation delay (72–200 ns) ensures sub-microsecond timing alignment.

Notebook PC Display Power

Tablet PC LCD Bias

Use Scenario: Powering 13.3"–15.6" HD/Full HD LCD panels with integrated source/gate drivers and touch controller.

IC Role / Device Role / Timing Role: Single-chip bias solution generating AVDD (8.4 V), VGH (24 V), VCORE (1.1 V), VIO1 (1.8 V), and VIO2 (1.8 V); manages XAO discharge and RST assertion during sleep/wake transitions.

Use Value: Reduces PCB area by >40% vs. discrete DC/DC + gamma IC solutions; eliminates external gamma resistor networks and VCOM trim pots.

Use Scenario: Driving 7"–10.1" IPS LCDs in battery-powered tablets requiring low quiescent current and robust thermal management.

IC Role / Device Role / Timing Role: Provides sequenced, temperature-compensated bias rails with I²C-configurable gamma tables and VCOM offsets; enables dynamic gamma tuning based on ambient light sensor input.

Use Value: Achieves <1.9 mA VIN quiescent current in shutdown mode; thermal shutdown (120–180°C) prevents damage during sustained backlight-on operation.

Monitor Display Subsystem

GIP-Based Industrial Display

Use Scenario: Supporting 21.5"–27" commercial monitors with high-resolution timing controllers and dual-scan gate drivers.

IC Role / Device Role / Timing Role: Delivers high-current AVDD (700 mA) and VGH (40 mA) with low-output-ripple design; uses tDLY6 delay to synchronize XAO discharge with vertical blanking interval.

Use Value: Meets EN55032 Class B EMI limits without additional filtering; gamma INL <±3.6 LSB ensures color fidelity across 1000:1 contrast ratio.

Use Scenario: Enabling flicker-free operation in medical or industrial GIP (Gate-in-Panel) displays where gate line timing must match pixel data latching.

IC Role / Device Role / Timing Role: Generates VGH with FLK-synchronized VGHM shaping and RE-controlled discharge; uses programmable tDLY6 to align XAO assertion with gate driver reset cycle.

Use Value: Eliminates visible horizontal banding during scrolling; VGHM propagation delay (72–200 ns) ensures sub-microsecond timing alignment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS65642YFFR	No EEPROM write protection (WP pin disabled); identical electrical specs and pinout.	Lacks hardware write protection for gamma/VCOM settings - unsuitable for field-updatable displays requiring tamper-resistant calibration.	Select TPS65642YFFR only for cost-sensitive, factory-programmed-only applications where EEPROM writes occur once at production test.
TPS65632AYFFR	Single boost (AVDD only), no VGH generator or gate shaping; 10-channel gamma; no VCOM calibrator.	Targeted at smaller panels (<7") without gate driver bias needs; lacks GIP support and panel discharge (XAO) functionality.	Choose TPS65632AYFFR for compact, low-cost displays where VGH is supplied externally or not required.

Compared with TPS65642YFFR, the TPS65642AYFFR adds hardware EEPROM write protection for secure field calibration updates; compared with TPS65632AYFFR, it provides full LCD bias integration - including dual-boost, gate shaping, and dual-VCOM - enabling single-chip solutions for mid-to-large-format displays.

Availability

TPS65642AYFFR is available at Aetrix Electronics and suitable for notebook PCs, tablet PCs, and commercial monitors requiring stable component supply, long-term lifecycle support, and traceable sourcing for display subsystems.

Supply support for TPS65642AYFFR 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 over 90 years of innovation history.

The TPS656xx family is designed specifically for LCD display bias and power management in portable and commercial computing devices - integrating gamma correction, VCOM generation, gate driver supplies, and system sequencing into compact, thermally efficient packages.

FAQ

What is the maximum VGH output voltage supported by the TPS65642AYFFR?

The TPS65642AYFFR supports a VGH output voltage range of 16 V to 40 V. Voltages above 36 V require an external cascode transistor or charge pump circuit, as specified in the datasheet's Recommended Operating Conditions. The device includes thermistor compensation via the TCOMP pin to maintain stable VGH across temperature, and the VGHM output enables gate voltage shaping for flicker reduction in GIP displays.

How does the TPS65642AYFFR handle power sequencing for LCD panel startup?

The TPS65642AYFFR implements configurable power sequencing via I²C registers: tSS1 (0.5–4 ms) controls VCORE/VIO1/VIO2 ramp time; tSS2 (4–7.5 ms) governs AVDD/VGH ramp; tDLY1 (0–70 ms) inserts delay before AVDD/VGH enable; and tDLY6 (0–35 ms) aligns XAO assertion with VGHM timing. This ensures safe, glitch-free startup - e.g., VCORE stabilizes before AVDD powers gamma DACs, and XAO discharges the panel only after VGH ramps down during shutdown.

Can the TPS65642AYFFR be used in GIP (Gate-in-Panel) displays?

Yes, the TPS65642AYFFR explicitly supports GIP displays through its gate voltage shaping function: the FLK input synchronizes VGHM switching, and the RE pin connects to an external resistor to control VGHM discharge timing. This enables precise alignment of gate driver turn-off with data latch events, eliminating visible flicker. The datasheet confirms GIP compatibility in Section 1.2 Applications and Functional Description.

What is the role of the RSET pin on the TPS65642AYFFR?

The RSET pin on the TPS65642AYFFR sets the reference current (50 µA typical) for the programmable VCOM calibrator. A precision resistor connected between RSET and GND determines the full-scale VCOM output range and directly impacts VCOM accuracy - with SETFSE error specified as ±7 LSB. This enables factory or field calibration of VCOM voltage without external DACs or trimmers, supporting tight VCOM tolerances required for high-contrast LCDs.

Does the TPS65642AYFFR include built-in protection features?

Yes, the TPS65642AYFFR includes multiple protection features: undervoltage lockout (UVLO) on VIN (2.3–2.5 V threshold), per-rail undervoltage protection (65–75% of nominal output), short-circuit protection (25–35% of nominal output), thermal shutdown (120–180°C), and I²C write protection via the WP pin. These ensure robust operation during input brownouts, load faults, overheating, and unintended configuration changes - critical for unattended display systems.

TPS65642AYFFR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 56-UFBGA, DSBGA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Converter, TFT LCD

Voltage - Input:: 2.6V ~ 6V

Number of Outputs:: 5

Voltage - Output:: Multiple

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-DSBGA (3.33x2.93)

TPS65642AYFFR FAQ

1.How can I place an order for TPS65642AYFFR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS65642AYFFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS65642AYFFR reliable?

The price and inventory of TPS65642AYFFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65642AYFFR is usually 5 days.

3.What payment methods are accepted for TPS65642AYFFR?

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4.How is shipping managed for TPS65642AYFFR?

TPS65642AYFFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS65642AYFFR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS65642AYFFR?

For technical support, including TPS65642AYFFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65642AYFFR requirements.

6.How does Aetrix verify that TPS65642AYFFR is sourced from the original manufacturer or authorized distributors?

All TPS65642AYFFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS65642AYFFR meets industry standards.

7.What is the process for return or replacement of TPS65642AYFFR?

All TPS65642AYFFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65642AYFFR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS65642AYFFR part is unused and in its original packaging.

Return procedure for TPS65642AYFFR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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