ISL88731HRZ-T Obsolete SMBus Battery Charger In Stock
Manufacturer: Renesas Electronics / Intersil
Package/Case: 28-pin TQFN, 5 × 5 × 0.75mm, Tape & Reel
Product Status: Obsolete
Description: SMBus-programmable multi-cell Li-ion battery charger controller with 7–25V input and up to 8A charge-current capability
The ISL88731HRZ-T is a highly integrated SMBus Level 2 battery charger controller originally developed by Intersil and now supported under Renesas Electronics. It is designed for smart battery systems using one to four series-connected Li-ion or Li-polymer cells.
Renesas officially lists ISL88731HRZ-T as obsolete. DataStorageIC offers available stock for legacy production, notebook repair and long-term equipment maintenance. Contact us for current quantity, date code, package photos and pricing.
ISL88731HRZ-T Specifications
| Parameter | Value |
| Battery chemistry | Li-ion / Li-polymer |
| Number of cells | 1 to 4 series cells |
| Input voltage | 7V to 25V |
| Charge voltage range | 2.7V to 19.2V |
| Charge voltage adjustment | 16mV steps |
| Maximum charge current | Up to 8A |
| Switching topology | Synchronous buck |
| Switching frequency | 400kHz typical |
| Charge voltage accuracy | ±0.5% |
| Charge current accuracy | ±3% |
| Trickle-charge current | 64mA to 220mA |
| Control interface | SMBus |
| Package | 28-pin TQFN |
| Package dimensions | 5 × 5 × 0.75mm |
| Operating temperature | -10°C to +100°C |
| MSL | Level 3 |
| RoHS | Compliant |
Typical Applications
ISL88731HRZ-T is commonly used in:
Notebook and sub-notebook computers
Smart battery chargers
Portable industrial equipment
Multi-cell Li-ion battery systems
Legacy embedded systems requiring SMBus charge control
Its integrated MOSFET drivers, bootstrap diode and precision current-sense amplifiers help reduce external component count. SMBus programming allows the host controller to configure battery voltage, charging current and adapter current limits.
FAQ
Is ISL88731HRZ-T discontinued?
Yes. Renesas officially marks ISL88731HRZ-T as obsolete. Its official obsolete date was January 21, 2023.
How many battery cells does ISL88731HRZ-T support?
It supports one to four series-connected Li-ion or Li-polymer battery cells.
What is the maximum charging current?
The controller supports charge currents up to 8A. Actual capability depends on the external MOSFETs, current-sense resistor, PCB layout and thermal design.
What package does ISL88731HRZ-T use?
It is supplied in a 28-pin, 5 × 5mm TQFN package. The “-T” suffix identifies tape-and-reel packaging.
Is there a direct replacement for ISL88731HRZ-T?
No direct replacement is specified in Renesas EOL Notice PLC21060. Any alternative requires verification of the pinout, SMBus interface, electrical limits and system firmware.
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Looking for ISL88731HRZ-T obsolete battery charger ICs in stock? Contact DataStorageIC for current availability, price, date code and delivery information.
