The ISL9238HRTZ-TK is a buck-boost Narrow Output Voltage DC (NVDC) charger. The ISL9238HRTZ-TK provides the NVDC charging, system bus regulation and protection features for tablet, Ultrabook, notebook, power bank, and any USB-C interface platform. The advanced Renesas R3™ Technology provides high light-load efficiency and fast transient response.
In Charging mode, the ISL9238HRTZ-TK takes input power from a wide range of DC power sources (such as conventional AC/DC charger adapters, USB PD ports, and travel adapters) and safely charges battery packs with up to 4-series cell Li-ion batteries.
As a NVDC topology charger, it also regulates the system output to a narrow DC range for stable system bus voltage. The system power can be provided from the adapter, battery, or a combination of both. The ISL9238HRTZ-TK can operate with only a battery, only an adapter, or both connected. For Intel IMVP8 compliant systems the ISL9238HRTZ-TK includes System Power monitor (PSYS) functionality, which provides an analog signal representing total platform power. The PSYS output connects to a wide range of IMVP8 core regulators to provide an IMVP8 compliant power domain function.
The ISL9238HRTZ-TK supports reverse buck, boost, or buck-boost operation to input port from 2- to 4-cell batteries.
The ISL9238HRTZ-TK has serial communication using SMBus/I2C that allows programming of many critical parameters to deliver a customized solution.
Feature
- Buck-boost NVDC charger for 1-, 2-, 3-, or 4-cell Li-ion batteries
- Input voltage range 3.2V to 23.4V (no dead zone)
- System output voltage 2.4V to 18.304V
- Autonomous charging option (automatic end of charging)
- System power monitor PSYS output, IMVP compliant
- Up to 1MHz switching frequency
- Adapter current and battery current monitor (AMON/BMON)
- PROCHOT# open-drain output, IMVP compliant
- Allows trickle charging of depleted battery
- Ideal diode control in Turbo mode
- Reverse buck, boost, and buck-boost operation from battery
- Two-level adapter current limit available
- Battery Ship mode option
- SMBus and auto-increment I2C compatible
- 4x4 32 Ld TQFN package APPLICATIONS
- 1 to 4-cell tablet, Ultrabook, notebook, power bank, and any USB-C interface portable device requiring batteries
