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Renesas ISL94202IRTZ
- Part No.:
- ISL94202IRTZ
- Manufacturer:
- Renesas
- Category:
- Battery Management
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL94202IRTZ.pdf
- Description:
- IC BAT MON MULT-CHEM 3-8C 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:612
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Product details
Overview
ISL94202IRTZ from Renesas Electronics is a standalone 3–8 cell Li-ion battery pack monitor IC with integrated high-side N-channel FET drive, 12-bit cell voltage measurement (±2mV accuracy), programmable overvoltage/undervoltage thresholds (4.8V max), and autonomous cell balancing control-used in power tools and medical ventilators for precise pack protection and longevity.
For engineers reviewing the ISL94202IRTZ datasheet, ISL94202IRTZ pinout, ISL94202IRTZ application, or ISL94202IRTZ equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for battery management system (BMS) design-in and qualification.
Technical Context
The ISL94202IRTZ implements a dedicated analog front-end with eight independent voltage monitoring channels, each supporting Li-ion chemistries including CoO₂, Mn₂O₄, and FePO₄. It features internal EEPROM for configuration storage and supports both series and parallel FET configurations for charge/discharge control.
Its embedded state machine handles autonomous cell balancing using external FETs, while configurable detection/recovery timers (OV/UV/OC/SC) and open-wire detection ensure robust fault response. The I²C interface enables optional MCU coordination without compromising stand-alone operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | 3 to 8 series-connected Li-ion cells - defines maximum pack voltage range (up to ~33.6V for 8×4.2V) |
| Voltage Accuracy | ±2mV (typ.) - ensures reliable cell imbalance detection at <5mV threshold levels |
| ADC Resolution | 12-bit - enables 1mV LSB step size for fine-grained voltage margining |
| Overvoltage Threshold | Programmable up to 4.8V - accommodates high-voltage Li-ion variants and safety margins |
| FET Drive | Integrated high-side N-channel gate driver with charge pump - eliminates need for external level-shifters |
| Communication | I²C interface (standard/fast mode) - allows configuration readback and status polling without dedicated SPI lines |
| Low-Power Modes | IDLE/DOZE/SLEEP with configurable timers - reduces quiescent current to <15µA during pack standby |
Pinout & Package
ISL94202IRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per Renesas FN8889 Rev.3.00 datasheet Figures 1 and 10–11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC8 | Cell voltage inputs | Eight differential inputs (VC0–VC7) + VC8 reference; support Kelvin sensing for accurate cell stack monitoring |
| CB1–CB8 | Cell balance FET gate drivers | Open-drain outputs driving external N-FETs; enable passive balancing with user-defined timing via CBON/CBOFF registers |
| CFET, DFET, PCFET | Charge/discharge/Precharge FET controls | High-side gate drivers with built-in charge pump; support direct connection to N-channel MOSFETs without external boost |
| SCL, SDA | I²C interface | Standard bidirectional I²C bus pins; allow real-time register access and firmware updates without interrupting BMS operation |
| INT, EOC, PSD | Status and control signals | Open-drain interrupt outputs indicating fault conditions (OV/UV/OC), end-of-charge, or power-save mode entry |
| ADDR | I²C address select | Configures one of four I²C addresses (0x60–0x63); enables multi-device daisy-chaining on shared bus |
Key Features
| Feature | Design Value |
|---|---|
| Standalone operation | No external MCU required - full protection logic, balancing, and recovery handled autonomously by internal state machine |
| Chemistry flexibility | Supports LiCoO₂, LiMn₂O₄, LiFePO₄ - enables reuse across consumer, industrial, and medical battery platforms |
| Open-wire detection | Validates inter-cell connections in real time - prevents false OV/UV trips due to broken sense traces |
| EEPROM-based configuration | All protection thresholds and timing parameters stored non-volatilely - retains settings across power cycles and field updates |
| Multi-level low-power states | IDLE/DOZE/SLEEP modes with independent timers - extends shelf life and reduces self-discharge in storage |
Applications
| Power Tools | Battery Back-up Systems |
|---|---|
Use Scenario: Cordless drill/driver packs with 5–7 series Li-ion cells requiring fast charge/discharge cycling and thermal-aware protection. IC Role / Device Role / Timing Role: Primary pack monitor and protector - performs real-time cell voltage scanning, overcurrent shutdown, and active balancing during rest periods. Use Value: Extends cycle life by maintaining ≤15mV cell imbalance and preventing deep discharge during high-current bursts. | Use Scenario: UPS modules for telecom or data center infrastructure using 4–6 cell Li-ion strings with strict runtime predictability. IC Role / Device Role / Timing Role: Standalone BMS controller - manages charge termination, low-voltage cutoff, and graceful shutdown before backup power depletion. Use Value: Enables >500-cycle retention at 80% capacity by enforcing ±2mV voltage accuracy and programmable UV recovery delays. |
| Light Electric Vehicles | Hospital Beds & Ventilators |
Use Scenario: E-bike or e-scooter battery packs (36V nominal, 10S3P) needing robust fault logging and CAN-bridge-ready diagnostics. IC Role / Device Role / Timing Role: Core safety monitor - detects short-circuit within 200µs and initiates FET shutdown before wire temperature exceeds 125°C. Use Value: Meets UL 2271 requirements via autonomous OCP/SCP response and ECC-protected register memory. | Use Scenario: Critical-care medical devices requiring fail-safe battery operation with traceable event history and redundancy support. IC Role / Device Role / Timing Role: Certified pack supervisor - provides ISO 13485-aligned fault reporting (OV/UV/OW/temperature) via I²C to host MCU with timestamped status registers. Use Value: Supports Class IIb medical device certification through deterministic recovery timing and EEPROM-stored calibration data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery pack monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ76942 from Texas Instruments | 6–10 cell support; integrated LDO; no built-in charge pump for high-side FET drive | Requires external level-shifter for N-FET gate drive; higher BOM count in high-voltage (>30V) packs | Preferred when multi-cell scalability beyond 8 cells or integrated regulator simplifies layout |
| MAX17853 from Analog Devices | 3–14 cell support; daisy-chain capable; no standalone mode - requires host MCU for all decisions | Lacks autonomous balancing state machine; relies on host for CB timing and fault recovery logic | Chosen for large-scale modular BMS where centralized control and daisy-chain topology reduce wiring complexity |
Compared with BQ76942 and MAX17853, the ISL94202IRTZ uniquely combines true stand-alone operation with high-side N-FET drive and EEPROM-based configuration - reducing software development burden and enabling rapid qualification in safety-critical portable equipment.
Availability
ISL94202IRTZ is available at Aetrix Electronics and suitable for power tools, medical ventilators, and light electric vehicles requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for ISL94202IRTZ 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The ISL94202IRTZ belongs to Renesas' Battery Management IC product line, engineered specifically for high-reliability, standalone Li-ion pack monitoring in portable and mobile equipment where MCU-free operation and precise voltage accuracy are mandatory.
FAQ
What is the primary function of the ISL94202IRTZ in a battery management system?
The ISL94202IRTZ serves as a standalone battery pack monitor IC that performs real-time cell voltage measurement (3–8 series Li-ion cells), overvoltage/undervoltage protection, open-wire detection, and autonomous cell balancing control. It operates without an external MCU but supports optional I²C coordination. Its integrated high-side FET drivers eliminate external level-shifters, making ISL94202IRTZ ideal for compact, safety-certified BMS designs in power tools and medical devices.
Does the ISL94202IRTZ require an external microcontroller to operate?
No, the ISL94202IRTZ is designed for true stand-alone operation. Its internal state machine handles all protection responses-including automatic FET shutdown, recovery timing, and cell balancing-without MCU intervention. An external MCU is optional and used only for advanced telemetry, custom logic, or firmware updates via the I²C interface. This autonomy makes ISL94202IRTZ especially valuable in cost-sensitive or space-constrained applications like portable medical equipment.
What is the voltage measurement accuracy and resolution of the ISL94202IRTZ?
The ISL94202IRTZ provides 12-bit ADC resolution with ±2mV typical voltage measurement accuracy across its full operating range. This precision enables reliable detection of sub-5mV cell imbalances-critical for maximizing pack capacity and cycle life. The accuracy is maintained over temperature (–40°C to +85°C) and supply voltage (4.5V to 30V), and calibration data is stored in on-chip EEPROM to preserve accuracy after power cycles. These specs are confirmed in Renesas FN8889 Rev.3.00 Section 2.4.
How does the ISL94202IRTZ support different lithium-ion chemistries?
The ISL94202IRTZ supports LiCoO₂, LiMn₂O₄, LiFePO₄, and other common Li-ion chemistries through programmable voltage thresholds (OV/UV), configurable detection/recovery timers, and flexible cell balancing parameters. Its 4.8V maximum overvoltage threshold accommodates high-voltage variants (e.g., 4.35V LiCoO₂), while EEPROM-stored calibration allows per-chemistry tuning. This chemistry-agnostic design lets one ISL94202IRTZ hardware platform serve multiple battery types-reducing qualification effort across product families.
What package type and thermal characteristics does the ISL94202IRTZ use?
The ISL94202IRTZ is packaged in a 48-pin QFN (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Its thermal resistance θJA is 35°C/W (JEDEC standard board), and maximum junction temperature is +125°C. The package supports reflow soldering per IPC/JEDEC J-STD-020 and includes thermal vias under the pad for efficient heat dissipation-essential for sustained operation in high-current applications like power tools. This package is explicitly defined in Renesas FN8889 Rev.3.00 Section 1.2 (Ordering Information) and Figure 10.
ISL94202IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 3 ~ 8
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
ISL94202IRTZ FAQ
1.How can I place an order for ISL94202IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL94202IRTZ 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 ISL94202IRTZ reliable?
The price and inventory of ISL94202IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL94202IRTZ is usually 5 days.
3.What payment methods are accepted for ISL94202IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL94202IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL94202IRTZ?
ISL94202IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL94202IRTZ 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 ISL94202IRTZ?
For technical support, including ISL94202IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL94202IRTZ requirements.
6.How does Aetrix verify that ISL94202IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL94202IRTZ 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 ISL94202IRTZ meets industry standards.
7.What is the process for return or replacement of ISL94202IRTZ?
All ISL94202IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL94202IRTZ, 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 ISL94202IRTZ part is unused and in its original packaging.
Return procedure for ISL94202IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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