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Renesas ISL6297CRZ
- Part No.:
- ISL6297CRZ
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL6297CRZ.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,830
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Product details
Overview
ISL6297CRZ from Intersil is a dual-mode Li-ion/Li-polymer battery charger IC optimized for space-constrained travel chargers. It integrates a P-channel pass MOSFET, current sensing, remote voltage sensing (VSEN), bi-color LED drivers, NTC thermistor interface, and THERMAGUARD™ thermal foldback. Delivers 4.2 V ±0.7% regulation and up to 1.0 A charge current with trickle preconditioning below 2.8 V - enabling safe, low-heat charging inside USB connector housings.
For engineers reviewing the ISL6297CRZ datasheet, ISL6297CRZ pinout, ISL6297CRZ application, or ISL6297CRZ equivalent, key selection considerations include dual-mode operation with current-limited adapters, programmable safety timer via external capacitor, 16-pin 4×4 mm QFN package with exposed thermal pad, ambient temperature monitoring with two-level thresholds, and integrated pre-charge verification with LED status indication.
Technical Context
The ISL6297CRZ implements Intersil's patent-pending dual-mode architecture: in constant-voltage mode it behaves as a precision linear charger; in current-limited mode it leverages the adapter's ILIM to minimize power dissipation - reducing peak thermal load by shifting from (VIN–VBAT)×ICHARGE to rDS(ON)×ICHARGE². Its state machine includes plug-in indication, open-battery detection, short-circuit test (384 cycles at 1 V threshold), and recharge hysteresis (4.00–4.08 V).
Thermal management combines ambient sensing via NTC on TEMP pin (with separate charge/non-charge thresholds) and die-temperature foldback triggered at +100°C (TFOLD), reducing charge current at 100 mA/°C. The 2.9 V reference (V2P9) powers LEDs and NTC circuitry independently of EN state and supports adapter presence detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.20 V ±0.7% - ensures full cell capacity without overvoltage stress per JEITA standards. |
| Max Charge Current | 1000 mA - programmable via IREF resistor; supports fast charge while limiting thermal rise in compact enclosures. |
| Trickle Current | 110 mA (typ) - 10% of IREF; safely conditions deeply discharged cells below 2.8 V before CC mode. |
| End-of-Charge Threshold | 63 mA (typ) - set by IMIN resistor; terminates charge when current drops below this level after reaching 4.2 V. |
| Thermal Foldback Trigger | +100°C junction - reduces charge current linearly (100 mA/°C) to prevent thermal runaway in sealed travel chargers. |
| Ambient Temp Range | −20°C to +70°C - validated operating range for consumer handhelds; supports two-level NTC-based cutoff (charge/non-charge). |
| Package | 16-pin 4×4 mm QFN with exposed thermal pad - JEDEC MO-220 compliant; enables high-power density and PCB-area efficiency. |
Pinout & Package
ISL6297CRZ uses a thermally enhanced 16-lead QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed ground pad (EPAD). The package complies with JEDEC PUB95 MO-220 and supports Pb-free reflow profiles. Thermal resistance θJA = 41°C/W and θJC = 4°C/W enable reliable operation in space-limited travel charger assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,15,16) | Input power supply | Accepts 4.3–6.5 V; internal POR at 3.4 V rising; series 1 Ω resistor recommended to suppress cable-plug overshoot. |
| GRN / RED (Pins 2,3) | Open-drain LED drivers | Sink 10 mA constant current each; drive bi-color LED for status (red=trickle/fast, green=EOC, yellow=fault). |
| TIME (Pin 4) | Oscillator timing input | Connects to GND via CTIME (e.g., 15 nF → 3 ms period); sets safety timer, state machine clock, and fault timeout intervals. |
| GND (Pin 5) | Ground reference | System ground return; EPAD internally connected to GND - must be soldered to large copper pour with thermal vias. |
| DT (Pin 6) | Delta-Temperature indicator | Outputs open-drain signal indicating active charge; also sets ΔT offset between ambient charge/non-charge thresholds. |
| EN (Pin 7) | Enable control | Pulled up to 2.9 V internally; pulled LOW to initiate charge (e.g., via battery ID pin); floating = disabled. |
| V2P9 (Pin 8) | 2.9 V reference output | Untrimmed, 30 mA capable; powers LEDs, NTC circuit, and serves as adapter-present indicator independent of EN. |
| IREF (Pin 9) | Charge current programming | Sets fast charge current (up to 1.5 A) and trickle current (10% of IREF); also functions as overcurrent protection threshold. |
| IMIN (Pin 10) | End-of-charge current setting | Programs EOC threshold (e.g., 133 kΩ → 63 mA); requires sustained drop below threshold for 3–4 oscillator cycles to trigger EOC. |
| TEMP (Pin 11) | NTC thermistor interface | Connects to voltage divider with NTC; enables dual-threshold ambient monitoring (e.g., −5°C to +45°C non-charge, +0°C to +45°C charge). |
| VSEN (Pin 12) | Battery remote sense | Feedback node for 4.2 V regulation; connects directly to battery (+) terminal to compensate for connector/contact resistance. |
| BAT (Pins 13,14) | Charger output | Delivers regulated current/voltage to battery; internal P-MOSFET switch with ~400 mΩ rDS(ON); no external blocking diode required. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode charging | Switches automatically between linear and current-limited modes - eliminates thermal bottleneck in travel charger connectors without redesigning AC/DC adapter. |
| Integrated pass element & current sense | Eliminates external MOSFET, current-sense resistor, and blocking diode - reduces BOM count and PCB footprint by ≥4 components. |
| THERMAGUARD™ thermal foldback | Prevents thermal failure by dynamically scaling charge current above +100°C - enables reliable operation in sealed, fanless enclosures. |
| Bi-color LED driver with status logic | Directly drives red/green LEDs with built-in sequencing (plug-in indication) and fault encoding (flashing yellow = short/open battery). |
| Remote voltage sensing (VSEN) | Compensates for up to 200 mV voltage drop across cables/connectors - maintains ±0.7% regulation accuracy at battery terminals. |
| Pre-charge verification & LED feedback | Confirms battery presence and health during connection verify (70 ms trickle pulse) - prevents false starts and reports open-circuit faults via LED behavior. |
Applications
| Smartphone Travel Charger | Medical Handheld Battery Pack |
|---|---|
Use Scenario: Compact wall-wart or car charger housing ISL6297CRZ inside the USB-A connector shell, powered by current-limited 5 V/1 A adapter. IC Role / Device Role / Timing Role: Dual-mode battery charger managing CC/CV profile, thermal foldback, and LED status - acts as system power manager during charge cycle. Use Value: Enables zero-PCB-space integration inside connector housing; eliminates need for heatsink or airflow - reduces total solution size by >30% vs. discrete linear charger. | Use Scenario: Rechargeable Li-ion pack for portable ECG or glucose monitor with ambient temperature monitoring and safety timer. IC Role / Device Role / Timing Role: Primary charge controller enforcing JEITA-compliant temperature windows and end-of-charge termination - ensures battery longevity and patient-device safety. Use Value: Two-level NTC thresholds prevent charging outside clinical operating range (e.g., disable above +45°C during use, allow +50°C only in storage); safety timer avoids overcharge in unattended scenarios. |
| Standalone Portable Charger | MP3 Player Integrated Charging |
Use Scenario: Pocket-sized 10,000 mAh power bank using ISL6297CRZ to charge its internal cell from USB input. IC Role / Device Role / Timing Role: High-efficiency linear charger with remote sensing and thermal foldback - manages charge under variable input conditions (USB 2.0/3.0, wall adapter). Use Value: Maintains 4.2 V regulation accuracy despite trace resistance; THERMAGUARD™ allows continuous 1 A charging without derating in plastic enclosure. | Use Scenario: Embedded charging in flash-based audio player with single-cell Li-polymer battery and bi-color LED user interface. IC Role / Device Role / Timing Role: Integrated charger with plug-in indication, trickle verification, and EOC LED transition - provides intuitive visual feedback without MCU intervention. Use Value: Red-to-green LED shift signals full charge; built-in 3 ms oscillator and TIME capacitor eliminate need for external timing IC or firmware timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Single-input linear charger with 1.5 A max current; lacks dual-mode operation and ambient temperature monitoring; uses different LED control scheme (active-high vs. open-drain). | Targeted at simpler USB-powered devices without NTC requirements; no delta-T or two-level ambient thresholds. | Choose BQ24075RGTR for cost-sensitive designs where thermal foldback and ambient sensing are unnecessary. |
| MAX8854ETA+ | 1.2 A linear charger with thermal regulation but no dual-mode capability; requires external blocking diode; no remote sense (VSEN) pin. | Suitable for fixed-voltage adapter systems only; limited to basic CC/CV without current-limited adapter optimization. | Select MAX8854ETA+ when board layout permits external diode and thermal margin is sufficient without THERMAGUARD™. |
Compared with BQ24075RGTR and MAX8854ETA+, the ISL6297CRZ uniquely delivers dual-mode operation for current-limited adapters, integrated remote sensing, and two-level ambient temperature control - making it the only option qualified for space-constrained travel charger integration with full JEITA compliance.
Availability
ISL6297CRZ is available at Aetrix Electronics and suitable for smartphone travel chargers, medical handheld battery packs, standalone portable chargers, MP3 player integrated charging, and self-charging battery modules requiring stable component supply and long-term lifecycle support.
Supply support for ISL6297CRZ 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
Intersil (now part of Renesas Electronics) is a U.S.-based analog and power management semiconductor company specializing in high-performance, thermally robust ICs for portable and space-constrained applications.
The ISL6297CRZ belongs to Intersil's battery management product line, designed specifically for ultra-compact, thermally sensitive Li-ion charging applications - including travel adapters, medical handhelds, and consumer electronics where PCB area and thermal headroom are severely constrained.
FAQ
What is the primary function of the ISL6297CRZ?
The ISL6297CRZ is a dual-mode Li-ion/Li-polymer battery charger IC that delivers constant-current/constant-voltage charging with integrated thermal foldback, ambient temperature monitoring, and bi-color LED status indication. It is engineered to operate inside space-limited travel charger connectors by minimizing heat generation through adaptive current-limited mode operation.
How does the ISL6297CRZ achieve low thermal dissipation?
The ISL6297CRZ achieves low thermal dissipation via its patent-pending dual-mode architecture: when paired with a current-limited AC/DC adapter, it shifts from traditional linear (VIN–VBAT)×I charging to low-loss rDS(ON)×I² operation. Combined with THERMAGUARD™ thermal foldback (triggered at +100°C), this enables safe 1 A charging in sealed enclosures without heatsinks - a key capability of the ISL6297CRZ.
Can the ISL6297CRZ be used with standard constant-voltage adapters?
Yes, the ISL6297CRZ operates in traditional linear mode with constant-voltage adapters, delivering precise 4.2 V ±0.7% regulation and programmable charge current up to 1.0 A. However, its dual-mode advantage - minimal heat generation - is fully realized only when used with current-limited adapters (e.g., 5 V/1 A USB sources), which is the intended application for the ISL6297CRZ.
What is the role of the VSEN pin on the ISL6297CRZ?
The VSEN pin on the ISL6297CRZ provides remote voltage sensing for accurate battery terminal regulation. It connects directly to the battery's positive terminal, compensating for voltage drop across PCB traces, connectors, and contact resistance - ensuring the ISL6297CRZ maintains ±0.7% 4.2 V accuracy at the cell, not just at the IC output.
Does the ISL6297CRZ support battery temperature monitoring?
Yes, the ISL6297CRZ supports ambient temperature monitoring via the TEMP pin, which interfaces with an external NTC thermistor. It provides two independent temperature thresholds - one for charging and another for non-charging states - allowing JEITA-compliant thermal management. Note: it monitors ambient (PCB) temperature, not direct battery temperature.
ISL6297CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- 1.1A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6.5V
- Interface:
- -
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
ISL6297CRZ FAQ
1.How can I place an order for ISL6297CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6297CRZ 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 ISL6297CRZ reliable?
The price and inventory of ISL6297CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6297CRZ is usually 5 days.
3.What payment methods are accepted for ISL6297CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6297CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6297CRZ?
ISL6297CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6297CRZ 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 ISL6297CRZ?
For technical support, including ISL6297CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6297CRZ requirements.
6.How does Aetrix verify that ISL6297CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6297CRZ 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 ISL6297CRZ meets industry standards.
7.What is the process for return or replacement of ISL6297CRZ?
All ISL6297CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6297CRZ, 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 ISL6297CRZ part is unused and in its original packaging.
Return procedure for ISL6297CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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