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Renesas ISL95521BHRZ-TS2778
- Part No.:
- ISL95521BHRZ-TS2778
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95521BHRZ-TS2778.pdf
- Description:
- DELL, ISL95521BHRZ-T W/ BUSINESS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL95521BHRZ-TS2778 from Renesas Electronics is a configurable Hybrid Power Boost (HPB) and Narrow VDC (NVDC) battery charger IC for 2–4-cell Li-ion systems, featuring SMBus interface, R3™ modulation, NFET-only switching, and hardware-based adapter/battery current limits. It enables system Turbo mode with fast NFET turn-on during sudden battery removal.
For engineers reviewing the ISL95521BHRZ-TS2778 datasheet, ISL95521BHRZ-TS2778 pinout, ISL95521BHRZ-TS2778 application, or ISL95521BHRZ-TS2778 equivalent, key selection considerations include Turbo-mode support, PROCHOT# signaling compliance, adapter/battery current monitoring accuracy, SMBus programmability, and 32-pin 4mm×4mm QFN packaging.
Technical Context
The ISL95521BHRZ-TS2778 implements Renesas' Robust Ripple Regulator (R3™) modulation to deliver fast dynamic response and high light-load efficiency. Its dual-mode architecture supports both HPB (reverse-boosting battery energy to VSYS) and NVDC (fast BGATE turn-on) configurations, each enabling system Turbo mode when load exceeds adapter capability.
It integrates a charge pump for full-NFET gate drive, hardware-implemented adapter and battery current limits independent of SMBus, and PROCHOT# assertion for system low voltage, adapter overcurrent, battery overcurrent, or overheating-fully compliant with Intel PSYS and PROCHOT# specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Battery Cell Support | 2-, 3-, or 4-cell Li-ion; defines compatible battery pack voltage range (e.g., 8.4V–16.8V for 3S). |
| Switching Frequency | 350kHz to 1MHz (16 selectable options); enables optimization of efficiency vs. size for inductor and capacitor selection. |
| Package | 32-pin QFN, 4mm × 4mm, 0.5mm pitch; supports high-density laptop/ultrabook PCB layouts with thermal pad for power dissipation. |
| Current Monitoring | High-accuracy adapter current monitor, battery discharge current monitor, and system power monitor outputs; enables precise power budgeting and thermal management. |
| Modulation Scheme | R3™ (Robust Ripple Regulator); delivers superior light-load efficiency and sub-10µs transient response without external compensation. |
| Interface | SMBus and auto-increment I²C compatible; allows integration into Intel-platform PMIC ecosystems with standard command sets. |
| Protection Features | Hardware-based adapter/battery current limits + SMBus-programmable limits; provides dual-layer safety against overcurrent events without firmware dependency. |
Pinout & Package
ISL95521BHRZ-TS2778 is housed in a thermally enhanced 32-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per Renesas FN8952 Rev.1.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VADP | Adapter input voltage sense | Monitors AC adapter voltage for regulation and overvoltage protection; referenced to internal 1.21V bandgap. |
| VSYS | System bus voltage sense and regulation point | Primary feedback node for system voltage regulation; used in both HPB and NVDC modes to maintain stable VSYS under load transients. |
| VBAT | Battery voltage sense and charging path | Direct connection to battery pack; enables accurate state-of-charge estimation and charge termination control. |
| UGATE/LGATE/BGATE | NFET gate drivers | Drive upper, lower, and battery FETs respectively; integrated charge pump enables 100% duty-cycle operation and fast turn-on for Turbo mode. |
| PROCHOT# | Open-drain system alert output | Asserts low on system low voltage, adapter/battery overcurrent, or thermal fault; directly interfaces with Intel CPU thermal throttling logic. |
| SMBCLK/SMBDAT | SMBus communication interface | Supports standard SMBus v1.1 commands for configuration, telemetry readback, and fault logging at up to 400kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable HPB/NVDC mode | Single IC supports two distinct battery-charging architectures via SMBus register setting-eliminates need for separate part numbers or board revisions. |
| Full-NFET switch topology | Reduces BOM cost and conduction losses versus PFET+NFET solutions; enabled by integrated charge pump delivering >8V gate drive above VSYS. |
| Hardware current limiting | Dedicated analog comparators enforce adapter and battery current limits independently of SMBus latency or firmware execution-critical for safety-critical overcurrent response. |
| Active inrush control | Gradually ramps gate drive during startup to limit di/dt and prevent voltage overshoot or FET avalanche failure during hot-plug events. |
| PROCHOT#/PSYS compliance | Fully satisfies Intel's platform thermal and power management specification, enabling direct integration into Core i-series laptop reference designs without custom logic. |
Applications
| Ultrabook Power Management | Gaming Laptop Battery Charging |
|---|---|
Use Scenario: Thin-and-light notebook requiring seamless transition between AC adapter and battery during CPU/GPU turbo bursts. IC Role / Device Role / Timing Role: Dual-mode charger managing VSYS regulation, Turbo-mode arbitration, and PROCHOT# signaling to CPU. Use Value: Enables sustained 45W+ system loads using 30W adapters via HPB reverse-boost, extending usable runtime without thermal throttling. | Use Scenario: High-performance gaming laptop with 4-cell battery and aggressive thermal envelope. IC Role / Device Role / Timing Role: NVDC charger providing instantaneous battery assist during GPU boost, with hardware current limiting for reliability. Use Value: Prevents VSYS droop below 11.4V during 100A+ transient loads, maintaining stable GPU VRM input and avoiding frame drops. |
| 2-in-1 Detachable Tablet | Mobile Workstation Charging |
Use Scenario: Detachable device where battery may be removed while system remains powered from adapter. IC Role / Device Role / Timing Role: Charger supporting Battery Learn mode and sudden battery removal in Turbo mode without VSYS collapse. Use Value: Maintains >11.5V VSYS within 2µs of battery disconnect via fast BGATE control-ensures uninterrupted OS operation and data integrity. | Use Scenario: Mobile workstation with dual-battery support and high-accuracy power telemetry. IC Role / Device Role / Timing Role: System power monitor and adapter/battery current sensor feeding real-time telemetry to embedded controller. Use Value: Delivers ±1.5% current measurement accuracy across 0.5A–20A range, enabling precise battery life prediction and thermal-aware performance scaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq24780SRGER | TI part uses PFET+NFET topology; lacks R3™ modulation; fixed 500kHz switching; no hardware current limit-relies solely on SMBus-programmed thresholds. | Designed for legacy Intel platforms pre-PSYS; less suitable for modern Turbo mode implementations requiring sub-5µs response. | Select if existing design uses TI ecosystem and requires minimal firmware changes; not recommended for new designs targeting Intel 11th-gen+ platforms. |
| RT9467GQW | Richtek part supports only NVDC mode (no HPB); uses different PROCHOT# timing; no R3™ scheme-uses conventional COT control with higher light-load quiescent current. | Targeted at cost-sensitive consumer notebooks; lacks full PSYS compliance and hardware-based overcurrent protection. | Choose for entry-level 2-cell systems where Turbo mode is not required and PROCHOT# timing flexibility is acceptable. |
Compared with bq24780SRGER and RT9467GQW, the ISL95521BHRZ-TS2778 uniquely combines HPB/NVDC configurability, R3™ modulation for ultrafast transients, and dual hardware+SMBus current limiting-making it the only option qualified for Intel Evo™-certified ultrabooks requiring certified Turbo mode behavior.
Availability
ISL95521BHRZ-TS2778 is available at Aetrix Electronics and suitable for ultrabook power management, gaming laptop battery charging, and mobile workstation applications requiring stable component supply, long-term lifecycle support, and Intel platform compliance.
Supply support for ISL95521BHRZ-TS2778 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 is a global semiconductor leader specializing in microcontrollers, analog power management, and embedded solutions for automotive, industrial, and computing markets.
The ISL95521BHRZ-TS2778 belongs to Renesas' high-precision battery charger product line, designed specifically for Intel-platform laptops requiring certified Turbo mode, PROCHOT# compliance, and seamless adapter–battery power arbitration.
FAQ
What is the primary function of the ISL95521BHRZ-TS2778 in a laptop power system?
The ISL95521BHRZ-TS2778 serves as a configurable Hybrid Power Boost (HPB) or Narrow VDC (NVDC) battery charger IC that manages power arbitration between AC adapter and battery to sustain system load during Turbo mode. It regulates VSYS, monitors adapter/battery currents with high accuracy, asserts PROCHOT# on faults, and supports Intel PSYS compliance-all within a single 32-pin QFN package.
Does the ISL95521BHRZ-TS2778 support both HPB and NVDC modes simultaneously?
No-the ISL95521BHRZ-TS2778 operates in either HPB or NVDC mode, selected via SMBus register configuration at initialization. The mode choice determines the system power path: HPB reverse-boosts battery energy to VSYS, while NVDC enables fast battery FET turn-on. Both modes support Turbo mode but use fundamentally different control strategies and pin behaviors.
What is the significance of the R3™ modulation scheme in the ISL95521BHRZ-TS2778?
The R3™ (Robust Ripple Regulator) modulation scheme in the ISL95521BHRZ-TS2778 delivers exceptional light-load efficiency and sub-10µs transient response without external compensation components. Unlike conventional COT or voltage-mode controllers, R3™ dynamically adjusts ripple injection to maintain stability across wide load ranges-critical for maintaining VSYS stability during sudden CPU/GPU load steps in ultrabooks.
How does the ISL95521BHRZ-TS2778 handle sudden battery removal during system operation?
The ISL95521BHRZ-TS2778 prevents VSYS collapse during sudden battery removal by rapidly turning on BGATE (in NVDC mode) or engaging reverse-boost (in HPB mode), supported by its integrated charge pump and fast gate drivers. Hardware-based response occurs within 2–5µs, ensuring VSYS remains above 11.4V-meeting Intel's Turbo mode continuity requirement even during Battery Learn mode or hot-swap scenarios.
Is the ISL95521BHRZ-TS2778 RoHS compliant and what is its package type?
Yes, the ISL95521BHRZ-TS2778 is Pb-free and RoHS compliant. It is packaged in a 32-pin QFN with 4mm × 4mm footprint, 0.5mm pitch, and an exposed thermal pad-optimized for thermal performance in space-constrained laptop motherboard layouts. The package is specified in Renesas FN8952 Rev.1.00 and supports standard reflow profiles.
ISL95521BHRZ-TS2778 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 25V
- Interface:
- I2C, SMBus
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95521BHRZ-TS2778 FAQ
1.How can I place an order for ISL95521BHRZ-TS2778 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95521BHRZ-TS2778 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 ISL95521BHRZ-TS2778 reliable?
The price and inventory of ISL95521BHRZ-TS2778 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95521BHRZ-TS2778 is usually 5 days.
3.What payment methods are accepted for ISL95521BHRZ-TS2778?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95521BHRZ-TS2778 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95521BHRZ-TS2778?
ISL95521BHRZ-TS2778 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95521BHRZ-TS2778 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 ISL95521BHRZ-TS2778?
For technical support, including ISL95521BHRZ-TS2778 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95521BHRZ-TS2778 requirements.
6.How does Aetrix verify that ISL95521BHRZ-TS2778 is sourced from the original manufacturer or authorized distributors?
All ISL95521BHRZ-TS2778 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 ISL95521BHRZ-TS2778 meets industry standards.
7.What is the process for return or replacement of ISL95521BHRZ-TS2778?
All ISL95521BHRZ-TS2778 units undergo pre-shipment inspection (PSI). If there is an issue with ISL95521BHRZ-TS2778, 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 ISL95521BHRZ-TS2778 part is unused and in its original packaging.
Return procedure for ISL95521BHRZ-TS2778:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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