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Renesas ISL6297CR-T
- Part No.:
- ISL6297CR-T
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL6297CR-T.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
ISL6297CR-T from Intersil is a dual-mode linear lithium-ion 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, and THERMAGUARD™ thermal foldback. Key confirmed parameters: 4.2 V ±0.7% regulated output voltage, programmable charge current up to 1.5 A via IREF, 100°C thermal foldback threshold, -20°C to +70°C operating ambient range, and 16-lead 4×4 mm QFN package.
For engineers reviewing the ISL6297CR-T datasheet, ISL6297CR-T pinout, ISL6297CR-T application, or ISL6297CR-T equivalent, this page delivers verified functional identity, thermal management behavior, LED status logic, battery preconditioning thresholds, and dual-mode current/voltage regulation constraints - all critical for portable Li-ion charging system design and thermal layout validation.
Technical Context
The ISL6297CR-T implements Intersil's patent-pending dual-mode architecture: it operates as a traditional linear charger with voltage-limited input, but switches to low-dissipation current-limited mode when paired with a current-limited AC/DC adapter. Its internal P-channel MOSFET (rDS(ON) ≈ 400 mΩ max) and 50 mV input-to-battery voltage comparator ensure safe start-up only when VIN > VBAT + 50 mV.
It embeds a 3 ms oscillator (programmable via CTIME), a 2.9 V reference (V2P9) with 30 mA drive capability, NTC-based ambient temperature monitoring with two-level thresholds (charge/non-charge), and a safety timer with programmable timeout. The IC enforces trickle charge (10% of IREF) below 2.8 V battery voltage and terminates charge when current falls below IMIN (e.g., 63 mA typical) while VBAT ≥ 4.00 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.20 V ±0.7% (±29.4 mV) - ensures precise Li-ion cell termination without overvoltage stress. |
| Max Charge Current | 1.5 A (programmable via IREF pin) - sets upper limit for constant-current phase and overcurrent protection level. |
| Trickle Current | 110 mA typical (10% of 1.1 A IREF) - safely conditions deeply discharged cells below 2.8 V before fast charge. |
| End-of-Charge Threshold | 63 mA typical (via IMIN pin) - triggers green LED and charge termination when battery reaches full CV saturation. |
| Thermal Foldback Start | +100°C junction temperature - automatically reduces charge current to prevent thermal runaway in sealed enclosures. |
| Remote Sense Accuracy | 0.7% voltage regulation with VSEN feedback - compensates for connector/contact resistance up to ~100 mΩ. |
| Operating Ambient Range | -20°C to +70°C - validated for consumer handheld and portable medical device environments. |
Pinout & Package
ISL6297CR-T is housed in a thermally enhanced 16-lead 4×4 mm QFN package (JEDEC MO-220 compliant) with exposed ground pad (EPAD) for optimal PCB heat dissipation. The package supports Pb-free reflow and features near chip-scale footprint for high-density portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,15,16) | Input power supply | Accepts 4.3–6.5 V DC; internal POR activates at 3.4 V rising threshold; series 1 Ω resistor recommended to suppress plug-in overshoot. |
| GRN / RED (Pins 2,3) | Open-drain LED drivers | Sink 10 mA constant current each - directly drives bi-color LED without external resistors; red = charging, green = complete, yellow = fault. |
| TIME (Pin 4) | Oscillator timing input | Connects to GND via CTIME capacitor (e.g., 15 nF → 3 ms period); sets safety timer and state machine clock. |
| GND (Pin 5) | System ground reference | Primary return path; EPAD internally connected to GND - must be soldered to large copper pour with thermal vias. |
| DT (Pin 6) | Delta-temperature indicator | Open-drain output indicating charge active (low) or inactive (high); also used to set ΔT offset for ambient temp monitoring. |
| EN (Pin 7) | Enable control input | Pulled up to 2.9 V internally; connect to battery ID pin (≤27 kΩ to GND) to initiate charge sequence on pack insertion. |
| V2P9 (Pin 8) | 2.9 V reference output | Untrimmed 2.9 V source (30 mA max) - powers LEDs, NTC circuit, or external logic; indicates adapter presence. |
| IREF (Pin 9) | Charge current programming | Sets fast-charge current (up to 1.5 A) and trickle current (10% of IREF); resistor value determines accuracy and tolerance. |
| IMIN (Pin 10) | End-of-charge current setting | Programs EOC threshold (e.g., 63 mA typical); charge terminates when sensed current drops below this level for ≥3 oscillator cycles. |
| TEMP (Pin 11) | NTC thermistor interface | Connects to NTC (e.g., 10 kΩ @ 25°C) - enables dual-level ambient temperature monitoring (charge/non-charge limits). |
| VSEN (Pin 12) | Battery voltage sense input | Remote feedback node - connect directly to battery (+) terminal to compensate for trace/contact resistance in charging path. |
| BAT (Pins 13,14) | Charger output | Delivers regulated 4.2 V to battery; integrated pass FET eliminates need for external blocking diode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode charging | Reduces thermal dissipation by switching between voltage-source and current-limited operation - enables placement inside travel charger connectors. |
| THERMAGUARD™ thermal foldback | Automatically scales back charge current above +100°C junction temperature - prevents thermal failure without external thermal sensors or shutdown. |
| Bi-color LED status indication | Integrated 10 mA sink drivers for red/green LEDs - provides real-time visual feedback for charge state, faults (yellow blink), and plug-in verification. |
| Pre-charge circuit verification | Validates battery connection and short-circuit condition during 70 ms "connection verify" window - avoids false starts and protects damaged cells. |
| Remote voltage sensing (VSEN) | Compensates for up to ~100 mΩ path resistance - maintains 4.2 V regulation accuracy at battery terminals despite PCB trace or connector losses. |
| Programmable safety timer | Timeout duration set by CTIME capacitor - prevents indefinite charging of defective or deeply discharged batteries. |
Applications
| Smartphone Travel Charger | Medical Handheld Battery Pack |
|---|---|
|
Use Scenario: Compact wall-wart or USB-powered charger for smartphones with tight thermal envelope and no heatsink. IC Role / Device Role / Timing Role: Primary Li-ion charging controller managing CC/CV profile, thermal foldback, and LED status in real time. Use Value: Enables direct integration into connector housing - eliminates cable-induced voltage drop and removes need for external thermal management components. |
Use Scenario: Rechargeable battery module for portable ECG or glucose monitors requiring reliable, temperature-aware charging in clinical environments. IC Role / Device Role / Timing Role: Safety-critical battery manager enforcing dual-level ambient temperature limits and open-battery detection before charge initiation. Use Value: Prevents charging outside safe temperature bands using NTC interface and guarantees battery connection integrity via 70 ms verification window. |
| Standalone Portable Charger | MP3 Player Integrated Charging |
|
Use Scenario: Self-contained power bank or desktop charger with no host MCU - relies on autonomous state machine and LED indicators. IC Role / Device Role / Timing Role: Fully autonomous charger executing plug-in sequence, trickle/fast/recharge states, and end-of-charge signaling without firmware. Use Value: Eliminates microcontroller dependency - reduces BOM cost and design complexity while maintaining full safety compliance. |
Use Scenario: On-board charging solution for ultra-thin MP3 players where PCB area and height are constrained. IC Role / Device Role / Timing Role: Space-optimized linear charger with 4×4 mm QFN package and integrated pass FET - no external MOSFET or diode required. Use Value: Saves >3 mm² board area versus discrete solutions and achieves <0.3 mm profile increase due to near chip-scale QFN footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lithium-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24040DRCT | Single-input 5-V-only charger; no dual-mode operation; fixed 4.2 V / 1 A; no VSEN; uses external MOSFET. | Lacks remote sensing and thermal foldback - requires careful layout and external thermal design for same power levels. | Choose for cost-sensitive, non-space-constrained 5 V USB-only applications where dual-mode efficiency is unnecessary. |
| MAX1555 | Fixed 4.2 V / 500 mA; no IREF/IMIN programmability; no VSEN; integrated LDO for system power; no NTC interface. | No ambient temperature monitoring or programmable safety timer - limited to basic single-cell charging without advanced safety features. | Choose for simple, low-current applications where autonomous LED indication suffices and thermal/NTC monitoring is omitted. |
Compared with BQ24040DRCT and MAX1555, the ISL6297CR-T uniquely combines dual-mode thermal optimization, remote voltage sensing, and integrated NTC-based ambient temperature control - making it suitable for high-reliability, space-limited travel chargers where cable compensation and thermal autonomy are mandatory.
Availability
ISL6297CR-T is available at Aetrix Electronics and suitable for smartphone travel chargers, portable medical handhelds, and standalone battery packs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6297CR-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
Intersil (now part of Renesas Electronics) is a U.S.-based analog and power management semiconductor company specializing in high-performance, thermally robust power conversion ICs.
The ISL6297CR-T belongs to Intersil's battery charger product line, designed specifically for compact, thermally isolated Li-ion charging systems in consumer and portable medical devices where minimal external components and autonomous safety are essential.
FAQ
What is the primary function of the ISL6297CR-T in a charging system?
The ISL6297CR-T serves as a fully integrated dual-mode lithium-ion linear battery charger IC. It manages constant-current/constant-voltage charging, implements thermal foldback above +100°C, verifies battery connection integrity, drives bi-color LED status indicators, and compensates for voltage drop via remote sensing (VSEN). Its core purpose is to enable safe, space-efficient charging in travel adapters and portable devices without external MOSFETs or diodes.
How does the ISL6297CR-T achieve lower thermal dissipation compared to standard linear chargers?
The ISL6297CR-T achieves lower thermal dissipation through its patent-pending dual-mode architecture. When paired with a current-limited AC/DC adapter, it operates in a low-dissipation mode where power loss is governed by rDS(ON) × I2 rather than (VIN − VBAT) × I. This reduces peak power dissipation significantly - especially during constant-current charging - enabling placement inside thermally restricted travel charger housings without heatsinks.
Can the ISL6297CR-T be used with a standard 5 V USB power source?
Yes, the ISL6297CR-T can operate from a 5 V USB source, but optimal thermal performance requires current-limiting behavior. A standard 5 V USB port (typically 500 mA–900 mA) functions as a de facto current-limited supply, allowing the ISL6297CR-T to enter its low-dissipation dual-mode. However, the IREF pin must be programmed higher than the USB port's current limit (e.g., ≥650 mA for 500 mA USB) to ensure proper overcurrent protection and avoid premature foldback.
What happens if the battery voltage is below 2.8 V when the ISL6297CR-T starts charging?
If the battery voltage is below 2.8 V at startup, the ISL6297CR-T initiates trickle charge mode - delivering 10% of the IREF-programmed current (e.g., 110 mA for 1.1 A IREF) until VBAT rises above the rising VMIN threshold (2.9 V typical). If VBAT fails to exceed 2.8 V within 1/8 of the safety timer period, the ISL6297CR-T terminates charging and flashes yellow to indicate a non-temperature fault, preventing damage to deeply depleted cells.
Does the ISL6297CR-T require an external microcontroller to operate?
No, the ISL6297CR-T operates autonomously without firmware. Its internal state machine handles plug-in indication, battery connection verification, short-circuit detection, trickle/fast/recharge sequencing, end-of-charge signaling, and thermal foldback - all driven by analog comparators, oscillators, and logic circuits. The ISL6297CR-T only requires passive components (resistors, capacitors, NTC) and a bi-color LED to function in a complete charging system.
ISL6297CR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
ISL6297CR-T FAQ
1.How can I place an order for ISL6297CR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6297CR-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 ISL6297CR-T reliable?
The price and inventory of ISL6297CR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6297CR-T is usually 5 days.
3.What payment methods are accepted for ISL6297CR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6297CR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6297CR-T?
ISL6297CR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6297CR-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 ISL6297CR-T?
For technical support, including ISL6297CR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6297CR-T requirements.
6.How does Aetrix verify that ISL6297CR-T is sourced from the original manufacturer or authorized distributors?
All ISL6297CR-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 ISL6297CR-T meets industry standards.
7.What is the process for return or replacement of ISL6297CR-T?
All ISL6297CR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6297CR-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 ISL6297CR-T part is unused and in its original packaging.
Return procedure for ISL6297CR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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