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Renesas ISL6256HAZ
- Part No.:
- ISL6256HAZ
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISL6256HAZ.pdf
- Description:
- IC BATT CHG LI-ION 2-4CEL 28QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,815
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Product details
Overview
ISL6256HAZ from Intersil is a highly integrated synchronous buck battery charger controller for Li-ion/Li-polymer packs in notebook computers, supporting 2-, 3-, and 4-cell configurations with ±0.5% charge voltage accuracy, ±3% adapter current limit accuracy, and programmable 4.2V ±5%/cell regulation. It integrates automatic AC/battery power source selection, diode-emulation light-load efficiency enhancement, and aircraft DC adapter detection via DCSET/DCPRN.
For engineers reviewing the ISL6256HAZ datasheet, ISL6256HAZ pinout, ISL6256HAZ application, or ISL6256HAZ equivalent, this device delivers precise dual-loop (voltage + adapter/battery current) regulation, MOSFET gate drivers for external high- and low-side N-MOSFETs and P-MOSFET power switches, and thermal shutdown - critical for compact, thermally constrained portable systems requiring stable charging under variable input and load conditions.
Technical Context
The ISL6256HAZ implements fixed-frequency (300 kHz typical) current-mode PWM control with feed-forward line regulation and adaptive dead-time management to prevent shoot-through. Its dual error amplifiers-VCOMP for battery voltage regulation and ICOMP for both battery charge current and adapter input current regulation-enable independent, simultaneous control of charging and system power sourcing.
Power path management is handled through dedicated SGATE (AC adapter P-MOSFET driver) and BGATE (battery P-MOSFET driver) outputs, while CSIP/CSIN and CSOP/CSON differential inputs provide ±3% accurate sensing of adapter and battery currents. The device supports aircraft power applications via DCSET threshold detection and disables charging when DCPRN asserts, preserving battery life in non-charging DC supply scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7 V to 25 V DCIN - supports wide-range AC adapters and aircraft DC supplies without external pre-regulation. |
| Charge Voltage Accuracy | ±0.5% over –10°C to +100°C - ensures safe, capacity-optimized Li-ion charging across full operating temperature range. |
| Adapter Current Limit Accuracy | ±3% - prevents AC adapter overload while maximizing available power for simultaneous system load and battery charging. |
| Battery Charge Current Limit Accuracy | ±3% - enables precise CC/CV charge profile execution per JEITA or OEM specifications. |
| Switching Frequency | 245–355 kHz (typ. 300 kHz) - balances efficiency, EMI, and inductor size for portable designs. |
| Thermal Shutdown Threshold | 150°C with 25°C hysteresis - provides robust protection against sustained overloads or poor PCB thermal design. |
| Battery Leakage Current | <10 µA - minimizes self-discharge during long-term storage or standby. |
Pinout & Package
ISL6256HAZ is housed in a 28-lead QSOP package (M28.15), with exposed pad not connected internally. Pin functions are validated per FN6499 Rev 3.00 datasheet Figure 2 (QSOP top view) and Functional Pin Descriptions (pp. 12–13).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SGATE | AC adapter P-MOSFET gate driver | Drives external high-side P-channel MOSFET to connect/disconnect AC adapter as system power source. |
| BGATE | Battery P-MOSFET gate driver | Controls battery discharge path; pulls low to select battery when AC adapter is absent or insufficient. |
| UGATE / LGATE | High-side / low-side N-MOSFET gate drivers | Drive external synchronous buck power stage; UGATE swings BOOT–PHASE, LGATE swings VDDP–PGND. |
| CSIP / CSIN | Adapter current sense differential inputs | Measure AC adapter current via external shunt; enable ±3% accurate input current limiting. |
| CSOP / CSON | Battery charge current sense & voltage feedback inputs | Dual-role: differential sense for charge current regulation; CSON also serves as battery voltage feedback node. |
| ACSET / DCSET | Adapter / aircraft DC adapter presence detection inputs | Resistor-divider inputs with 1.26 V threshold; support dual-source detection with separate ACPRN/DCPRN outputs. |
| CHLIM / ACLIM | Charge current limit / adapter current limit set inputs | Analog voltage inputs (0.1–3.6 V) that program full-scale sense thresholds with linear scaling (e.g., CHLIM = 3.3 V → 165 mV). |
| CELLS | Battery cell count configuration input | Logic-selects 2S (float), 3S (GND), or 4S (VDD) topology - configures internal reference scaling for CSON regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with diode emulation | Maintains >90% efficiency at light loads by turning off LGATE and allowing body diode conduction, preventing system bus boosting. |
| Automatic power source selector | Seamlessly transitions between AC adapter and battery without system interruption or brownout using SGATE/BGATE control logic. |
| Aircraft DC adapter support | DCSET/DCPRN interface enables 15 V aircraft power detection and disables battery charging while powering system - compliant with DO-160 requirements. |
| Programmable charge voltage (±5%) | VADJ input adjusts regulation point from 4.2 V −5% to 4.2 V +5% per cell, enabling optimization for cycle life vs. capacity trade-offs. |
| Integrated 5 V LDO (VDD) | Supplies internal analog circuitry; regulated output (4.925–5.225 V) eliminates need for external bias rail. |
| Low quiescent current | 3 mA max DCIN quiescent current at 7–25 V - extends runtime in adapter-off, battery-only operation. |
Applications
| Notebook Computer Power Management | Aircraft-Grade Portable Systems |
|---|---|
Use Scenario: Dual-power notebook with Li-ion battery and universal AC adapter, requiring seamless switchover and thermal-safe charging. IC Role / Device Role / Timing Role: Primary battery charger controller and automatic AC/battery power selector. Use Value: Enables single-chip solution for 2–4S battery charging, adapter current limiting, and zero-interruption power source handoff - reducing BOM count and PCB area. |
Use Scenario: Ruggedized tablet used on commercial aircraft, powered by 15 V DC supply without battery charging. IC Role / Device Role / Timing Role: Aircraft DC adapter monitor and system power manager with charge disable capability. Use Value: DCSET-triggered DCPRN assertion disables charging while maintaining regulated system bus voltage - meeting aviation safety and battery preservation mandates. |
| Sub-notebook Thermal-Constrained Design | PDA Battery Charging System |
Use Scenario: Fanless sub-notebook operating at ambient up to +100°C, requiring precise voltage regulation and thermal shutdown. IC Role / Device Role / Timing Role: High-accuracy battery charger with integrated thermal protection and low-leakage power path. Use Value: ±0.5% charge voltage accuracy over full –10°C to +100°C range ensures safe charging across extreme environments; <10 µA leakage preserves shelf life. |
Use Scenario: Legacy PDA with removable 2S Li-polymer battery and USB-powered charging. IC Role / Device Role / Timing Role: Compact, cost-optimized battery charger supporting 2-cell configuration and USB current limiting. Use Value: CELLS = float configures 2S mode; ACLIM = GND sets 50 mV adapter limit - enabling direct USB 500 mA compliance without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6256AHAZ | Improved CSOP–CSON full-scale sense voltage tolerance (±1.65 mV vs. ±5 mV at CHLIM = 3.3 V); identical pinout and functional block diagram. | Higher precision required for JEITA-compliant fast-charge profiles with tight current tolerance. | Select ISL6256AHAZ when ±1% battery charge current accuracy is mandatory; otherwise ISL6256HAZ meets standard notebook requirements. |
| RT9466E | Single-chip solution with integrated power MOSFETs; lacks separate SGATE/BGATE outputs and aircraft DC detection (no DCSET/DCPRN). | Cost-sensitive, space-constrained designs where external MOSFETs are undesirable and aircraft operation is not required. | Choose RT9466E only for simplified 2–4S charging without power source selection or aircraft support; ISL6256HAZ retains full flexibility for complex portable platforms. |
Compared with ISL6256AHAZ, the ISL6256HAZ offers sufficient accuracy for mainstream notebooks but trades minor current-sense tolerance for broader legacy compatibility; versus RT9466E, it provides discrete MOSFET control, dual-source selection, and DO-160-ready aircraft detection - essential for high-reliability mobile computing.
Availability
ISL6256HAZ is available at Aetrix Electronics and suitable for notebook computers, sub-notebooks, and aircraft-grade portable systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6256HAZ 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 semiconductor company specializing in precision analog, power management, and interface ICs for computing, industrial, and aerospace applications.
The ISL6256HAZ belongs to Intersil's notebook power management product line, designed specifically for highly integrated, thermally robust battery charging and automatic AC/battery power source selection in portable computing platforms.
FAQ
What is the primary function of the ISL6256HAZ in a notebook system?
The ISL6256HAZ serves as a complete battery charger controller and automatic power source selector. It regulates Li-ion/Li-polymer battery charging (2–4 cells) using synchronous buck topology, enforces precise adapter and battery current limits, and seamlessly switches between AC adapter and battery power - all within a single 28-lead QSOP package. Its integration reduces external component count while maintaining high accuracy and thermal safety.
How does the ISL6256HAZ support aircraft power applications?
The ISL6256HAZ supports aircraft power via its dedicated DCSET input and DCPRN open-drain output. When a 15 V aircraft DC supply is detected at DCSET (>1.26 V), DCPRN pulls low, signaling host firmware to disable battery charging while continuing to power the system. This behavior complies with aviation safety requirements that prohibit charging during flight, and is distinct from AC adapter detection handled by ACSET/ACPRN.
What are the key differences between ISL6256HAZ and ISL6256AHAZ?
The ISL6256AHAZ improves upon the ISL6256HAZ with tighter current-sense amplifier tolerances: ±1.65 mV vs. ±5 mV full-scale error at CHLIM = 3.3 V. Both share identical pinout, package (28-lead QSOP), functional architecture, and temperature range (–10°C to +100°C). The ISL6256HAZ remains suitable for standard notebook applications where ±3% charge current accuracy is sufficient.
Can the ISL6256HAZ be used with 2-cell, 3-cell, and 4-cell battery packs?
Yes. The ISL6256HAZ supports 2-, 3-, and 4-cell Li-ion/Li-polymer packs via the CELLS pin: float for 2S, GND for 3S, and VDD for 4S. Internal reference scaling adjusts the CSON feedback target accordingly - e.g., 8.4 V for 2S, 12.6 V for 3S, and 16.8 V for 4S - all with ±0.5% regulation accuracy across –10°C to +100°C.
What is the role of the SGATE and BGATE pins on the ISL6256HAZ?
SGATE drives an external P-channel MOSFET to connect the AC adapter to the system bus; BGATE drives another external P-channel MOSFET to connect the battery. These outputs implement automatic power source selection: when AC adapter is present, SGATE activates and BGATE deactivates; upon removal, BGATE activates and SGATE deactivates - ensuring uninterrupted system operation without voltage droop or reset.
ISL6256HAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Temperature, Over Voltage, Short Circuit
- Charge Current - Max:
- 2.6A
- Battery Pack Voltage:
- 17.64V (Max)
- Voltage - Supply (Max):
- 25V
- Interface:
- -
- Operating Temperature:
- -10°C ~ 100°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP/QSOP
ISL6256HAZ FAQ
1.How can I place an order for ISL6256HAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6256HAZ 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 ISL6256HAZ reliable?
The price and inventory of ISL6256HAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6256HAZ is usually 5 days.
3.What payment methods are accepted for ISL6256HAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6256HAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6256HAZ?
ISL6256HAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6256HAZ 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 ISL6256HAZ?
For technical support, including ISL6256HAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6256HAZ requirements.
6.How does Aetrix verify that ISL6256HAZ is sourced from the original manufacturer or authorized distributors?
All ISL6256HAZ 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 ISL6256HAZ meets industry standards.
7.What is the process for return or replacement of ISL6256HAZ?
All ISL6256HAZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6256HAZ, 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 ISL6256HAZ part is unused and in its original packaging.
Return procedure for ISL6256HAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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