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Renesas ISL97649AIRZ-T
- Part No.:
- ISL97649AIRZ-T
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
ISL97649AIRZ-T.pdf
- Description:
- IC POWER MANAGEMENT
- Quantity:
- Payment:
- Shipping:
Inventory:1,143
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Product details
Overview
ISL97649AIRZ-T from Renesas (formerly Intersil) is an integrated power management IC (PMIC) for TFT-LCD panels in notebooks, tablets, and monitors. It integrates a 1.5A boost converter (600/1200kHz), 350mA VLOGIC LDO, charge-pump–derived VON/VOFF supplies, gate pulse modulator (up to 30V), supply monitor with RESET output, and a digitally controlled VCOM amplifier with I²C interface and nonvolatile 8-bit DCP. It delivers full panel power sequencing and calibration in a single 28-lead QFN.
For engineers reviewing the ISL97649AIRZ-T datasheet, ISL97649AIRZ-T pinout, ISL97649AIRZ-T application, or ISL97649AIRZ-T equivalent, key selection considerations include AVDD boost efficiency at light load, programmable VCOM calibration stability across temperature, gate pulse slew/delay configurability via external RC, I²C address (0x50), and thermal performance under sustained VGHM drive conditions.
Technical Context
The ISL97649AIRZ-T implements a current-mode PWM boost controller with selectable 600kHz or 1.2MHz switching, internal 1.5A/0.18Ω FET, and soft-start via external capacitor on SS pin. Its gate pulse modulator uses CE and RE pins to set delay and falling slew rate independently, while VDPM enables timed activation of VGHM output.
The VCOM amplifier features rail-to-rail input (0–AVDD), 20MHz gain-bandwidth, 25V/µs slew rate, and 75dB CMRR; its DCP wiper position is stored in nonvolatile EEPROM and recalled at power-up. The supply monitor uses VDIV and CD2 resistive dividers to generate a reset signal with configurable rising-edge delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion or regulated 3.3V/5V rails without pre-regulation. |
| AVDD Boost Output | Programmable up to ~8.06V - set via FB resistor divider; 0.8V reference enables precise voltage setting. |
| VLOGIC LDO Output | Adjustable via ADJ pin - supports TCON logic supply from 1.8V to 3.3V using external feedback resistors. |
| VCOM Amplifier Output | ±75mA short-circuit current - drives typical LCD VCOM loads (10kΩ || 10pF) with <15mV offset and 25V/µs slew. |
| I²C Interface | Standard-mode (400kHz), address 0x50 - enables real-time VCOM calibration and DCP wiper updates during operation. |
| Thermal Resistance | θJA = 38°C/W - requires thermal pad soldering and PCB copper pour for reliable operation at full load. |
| Protection Features | UVLO (2.33V), OVP (15.5V), OTP (153°C), OCP, UVP - ensures robust fault recovery in panel power-up/down sequences. |
Pinout & Package
ISL97649AIRZ-T is housed in a Pb-free 28-lead 4mm × 5mm QFN package with exposed thermal pad (PKG DWG L28.4x5A). Pin 1 is marked by dot; top-side marking reads "97649 AIRZ".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | AVDD boost feedback | Connects to center of resistor divider between AVDD and GND to set output voltage precisely. |
| PGND | Power ground | High-current return path for boost switch and LDO; must be low-inductance connection to thermal pad. |
| CE | GPM delay control | Capacitor to GND sets delay before VGHM activation; critical for TCON timing alignment. |
| RE | GPM slew control | Resistor to GND sets falling edge slew rate of VGHM; prevents gate driver overvoltage stress. |
| VGH | GPM high-voltage input | Accepts up to +33V; decoupled with 0.1µF ceramic capacitor near pin for noise immunity. |
| VGHM | GPM output to gate driver | Drives external gate driver IC; includes internal pull-down (1.1kΩ) and low RON (23Ω). |
| SCL/SDA | I²C interface | Standard-mode bus lines; 5pF max capacitance; require pull-ups per I²C spec (typically 2.2–4.7kΩ). |
| RSET | DCP resolution control | Resistor to GND sets DCP output voltage step size; determines VCOM calibration granularity. |
| RESET | Supply monitor output | Open-drain active-low signal; pulled down internally at power-down; used for system initialization. |
| EN | Global enable | Logic-high (>1.75V) activates all functions; pulled low disables boost, LDO, GPM, and VCOM amplifier. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated TFT-LCD power stack | Combines AVDD boost, VLOGIC LDO, VON/VOFF charge pumps, GPM, RESET, and VCOM calibrator-reduces BOM count by ≥6 discrete ICs. |
| Selectably clocked boost converter | 600kHz or 1.2MHz via FREQ pin-enables trade-off between light-load efficiency (600kHz) and component size (1.2MHz). |
| Nonvolatile DCP with EEPROM | 8-bit wiper position retained across power cycles; 1,000 write cycles endurance; recalled automatically at startup. |
| VCOM amplifier with rail-to-rail input | Operates from 0V to AVDD; supports common-mode range matching LCD panel bias requirements without level-shifting. |
| Configurable gate pulse timing | Independent CE (delay) and RE (slew) pins allow fine-tuning of VGHM rise/fall behavior to match specific gate driver IC specs. |
| Comprehensive fault protection | Includes UVLO, OVP, OTP, OCP, and UVP-prevents latch-up or damage during abnormal input, load, or thermal conditions. |
Applications
| Notebook LCD Power Management | Tablet PC Panel Sequencing |
|---|---|
|
Use Scenario: Powering 10–15.6-inch TFT-LCD panels in ultrabooks with tight thermal envelopes and dynamic brightness control. IC Role / Device Role / Timing Role: Central PMIC managing AVDD, VLOGIC, VON/VOFF generation, gate driver timing, and VCOM calibration via I²C. Use Value: Enables single-chip panel power solution with programmable VCOM trim, reducing calibration time and eliminating manual potentiometers. |
Use Scenario: Driving high-resolution IPS panels in Android/iOS tablets requiring fast startup, low standby current, and ESD-hardened interfaces. IC Role / Device Role / Timing Role: Provides synchronized AVDD ramp, VLOGIC enable, and RESET assertion to coordinate TCON and backlight IC startup. Use Value: Soft-start and supply monitoring ensure glitch-free boot; 2.5–5.5V input range supports USB-C PD and battery direct operation. |
| Monitor Panel Calibration System | Industrial Display Power Module |
|
Use Scenario: Factory calibration of commercial monitors where VCOM offset must be stable across temperature and lifetime. IC Role / Device Role / Timing Role: VCOM amplifier with nonvolatile DCP stores calibrated wiper value; I²C allows host MCU to read/write settings post-calibration. Use Value: Eliminates need for external DAC or trimming resistors; 8-bit resolution supports ±10mV VCOM adjustment accuracy. |
Use Scenario: Embedded HMI displays in medical or industrial equipment requiring extended temperature operation (-40°C to +85°C) and long-term reliability. IC Role / Device Role / Timing Role: Delivers robust, sequenced power to display subsystem with built-in RESET signaling and thermal shutdown. Use Value: Integrated protections reduce field failure risk; QFN package with thermal pad ensures stable operation under continuous VGHM drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97649AR5566 | Same die, optimized for newer reference designs; identical pinout, electrical specs, and feature set. | No functional difference; recommended for new designs per Renesas documentation. | Select ISL97649AR5566 for new designs; ISL97649AIRZ-T remains valid for legacy production continuity. |
| TPS65150RGER | TI PMIC with separate AVDD/VGH/VGL regulators; no integrated VCOM amplifier or DCP; different I²C register map. | Lacks VCOM calibration capability; requires external op-amp and DAC for VCOM tuning. | Choose only if VCOM calibration is handled externally; not a drop-in replacement due to missing DCP/VCOM functions. |
Compared with ISL97649AR5566, the ISL97649AIRZ-T offers identical functionality but is designated for legacy use; versus TPS65150RGER, it provides integrated VCOM calibration-eliminating two external components and simplifying factory calibration flow.
Availability
ISL97649AIRZ-T is available at Aetrix Electronics and suitable for notebook LCD power management, tablet PC panel sequencing, and industrial display calibration systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97649AIRZ-T 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
Renesas Electronics Corporation acquired Intersil in 2017 and maintains full technical and supply chain support for legacy Intersil PMICs including the ISL97649A family.
The ISL97649A product line was designed specifically for cost-sensitive, space-constrained TFT-LCD panels in portable computing and display applications-integrating multiple power rails and analog functions into one QFN package.
FAQ
What is the I²C address of the ISL97649AIRZ-T and how is it configured?
The ISL97649AIRZ-T has a fixed I²C slave address of 0x50 (0101000 binary, MSB left). This address is hardwired and cannot be changed via pins or registers. Communication follows standard-mode I²C protocol (≤400kHz), with SCL and SDA requiring external pull-up resistors (typically 2.2–4.7kΩ). The ISL97649AIRZ-T supports both volatile writes (for runtime VCOM adjustment) and nonvolatile writes (to store DCP wiper position in EEPROM).
How does the ISL97649AIRZ-T generate VON and VOFF voltages without dedicated charge pump ICs?
The ISL97649AIRZ-T generates VON and VOFF using internal charge pumps driven directly by the LX (boost switch node) signal. This architecture eliminates external flying capacitors and diodes required by discrete charge pumps. VON is typically +24V and VOFF is –6V, derived from AVDD and referenced to PGND. The charge pump efficiency and regulation depend on LX waveform integrity and proper layout of LX and PGND paths.
What is the purpose of the RSET pin on the ISL97649AIRZ-T and how is it used?
The RSET pin on the ISL97649AIRZ-T sets the current sink for the digitally controlled potentiometer (DCP), determining the step resolution of the VCOM output voltage. A resistor connected between RSET and GND adjusts the DCP's full-scale attenuation ratio (1:20) and wiper voltage granularity. Typical values range from 10kΩ to 100kΩ; lower resistance increases resolution but reduces DCP output voltage range. The ISL97649AIRZ-T datasheet provides design equations for precise VCOM calibration targeting.
Can the ISL97649AIRZ-T operate with a 3.3V-only input supply, and what outputs does it support at that voltage?
Yes, the ISL97649AIRZ-T operates fully across 2.5V to 5.5V input, including 3.3V nominal supplies. At VIN = 3.3V, it delivers AVDD ≈ 8.06V (via boost), VLOGIC adjustable from 1.8V to 3.3V (via LDO), VON ≈ +24V and VOFF ≈ –6V (via charge pumps), and VCOM output swing from ~0.1V to AVDD–1.27V. All protections (UVLO, OVP, OTP) remain active, and I²C communication functions normally.
What thermal design considerations apply to the ISL97649AIRZ-T in high-power LCD applications?
The ISL97649AIRZ-T has θJA = 38°C/W and requires proper thermal management: the exposed thermal pad must be soldered to a minimum 200mm² copper pour with ≥4 thermal vias (0.3mm diameter) to inner/ground planes. In continuous VGHM drive at 30V/100mA, junction temperature rise exceeds 40°C above ambient; derating is advised above 70°C ambient. Layout must minimize LX and PGND loop inductance to reduce switching losses and EMI.
ISL97649AIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- LCD Display
- Current - Supply:
- 700µA
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
ISL97649AIRZ-T FAQ
1.How can I place an order for ISL97649AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97649AIRZ-T 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 ISL97649AIRZ-T reliable?
The price and inventory of ISL97649AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97649AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL97649AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97649AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97649AIRZ-T?
ISL97649AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97649AIRZ-T 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 ISL97649AIRZ-T?
For technical support, including ISL97649AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97649AIRZ-T requirements.
6.How does Aetrix verify that ISL97649AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL97649AIRZ-T 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 ISL97649AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL97649AIRZ-T?
All ISL97649AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL97649AIRZ-T, 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 ISL97649AIRZ-T part is unused and in its original packaging.
Return procedure for ISL97649AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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