The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration quickly turns on BGATE to enable the
battery to help adapter provide the system power in Turbo mode.
The ISL88739 uses N-channel MOSFETs (NFETs) for all the
switches to achieve the best performance and lowest BOM cost.
The internal charge pump is capable of turning on all the NFETs
fast or slow depending on the circumstance or need. The ability to
quickly turn on NFETs prevents system bus voltage drop when the
battery is suddenly removed in Turbo mode or in Battery Learn
mode.
The ISL88739 provides many protection features including the
PROCHOT# indicator for system low voltage, adapter overcurrent,
battery overcurrent or overheating, with an array of SMBus
programmable parameters for maximum flexibility. It also
features hardware based adapter current limit and
battery-current limit in addition to SMBus programmable limits.
The ISL88739 provides a high accuracy adapter current monitor,
battery current monitor, and system power monitor outputs. To
provide maximum flexibility for working with high power and low
power systems, it provides several configurable current-sense
resistor value options to achieve the best trade-off of current
sensing accuracy vs power loss.
The ISL88739 uses the Renesas Robust Ripple Regulator (R3)
modulation scheme to provide excellent light-load efficiency and
fast dynamic response. It is available in a 32 Ld 4mmx4mm QFN
package.
Features
• Configurable as an HPB charger or NVDC charger
• Compliant with Intel PROCHOT# requirements
• Adapter current monitor and battery discharging current monitor
- Uses NFET for all the switches
- Supports removal of battery during Battery Learn mode
- Actively controlled inrush current to prevent FET damage
• SMBus programmable settings and high accuracy
• Comprehensive protection features include
- PROCHOT# indicator for system low voltage, adapter
overcurrent, battery overcurrent, or system overheating
- Hardware-based adapter-current and battery-current limits
- Supports sudden removal of battery in system Turbo mode
• 16 switching frequency options from 350kHz to 1MHz
• Low quiescent current
• SMBus and auto-increment I2C compatible
• Robust Ripple Regulator (R3) modulation scheme provides excellent light-load efficiency and fast dynamic response
• 32 Ld 4mmx4mm QFN package
• Pb-free (RoHS compliant)
Applications
• Devices with rechargeable 2-, 3- or 4-cell batteries
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration quickly turns on BGATE to enable the
battery to help adapter provide the system power in Turbo mode.
The ISL88739 uses N-channel MOSFETs (NFETs) for all the
switches to achieve the best performance and lowest BOM cost.
The internal charge pump is capable of turning on all the NFETs
fast or slow depending on the circumstance or need. The ability to
quickly turn on NFETs prevents system bus voltage drop when the
battery is suddenly removed in Turbo mode or in Battery Learn
mode.
The ISL88739 provides many protection features including the
PROCHOT# indicator for system low voltage, adapter overcurrent,
battery overcurrent or overheating, with an array of SMBus
programmable parameters for maximum flexibility. It also
features hardware based adapter current limit and
battery-current limit in addition to SMBus programmable limits.
The ISL88739 provides a high accuracy adapter current monitor,
battery current monitor, and system power monitor outputs. To
provide maximum flexibility for working with high power and low
power systems, it provides several configurable current-sense
resistor value options to achieve the best trade-off of current
sensing accuracy vs power loss.
The ISL88739 uses the Renesas Robust Ripple Regulator (R3)
modulation scheme to provide excellent light-load efficiency and
fast dynamic response. It is available in a 32 Ld 4mmx4mm QFN
package.
Features
• Configurable as an HPB charger or NVDC charger
• Compliant with Intel PROCHOT# requirements
• Adapter current monitor and battery discharging current monitor
- Uses NFET for all the switches
- Supports removal of battery during Battery Learn mode
- Actively controlled inrush current to prevent FET damage
• SMBus programmable settings and high accuracy
• Comprehensive protection features include
- PROCHOT# indicator for system low voltage, adapter
overcurrent, battery overcurrent, or system overheating
- Hardware-based adapter-current and battery-current limits
- Supports sudden removal of battery in system Turbo mode
• 16 switching frequency options from 350kHz to 1MHz
• Low quiescent current
• SMBus and auto-increment I2C compatible
• Robust Ripple Regulator (R3) modulation scheme provides excellent light-load efficiency and fast dynamic response
• 32 Ld 4mmx4mm QFN package
• Pb-free (RoHS compliant)
Applications
• Devices with rechargeable 2-, 3- or 4-cell batteries
