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MAXIM New Products - MAX77301 & MAX14970
2013-05-13
MAX77301
JEITA-Compliant, Li+ Charger with Smart Power Selector, Automatic Detection, and USB Enumeration
Safe and Quick Charging, Adapter Type Detection, and Maximum Charge Current Enumeration
Description
The MAX77301 is a JEITA-compliant* lithium-ion linear battery charger that operates from a USB port, a dedicated charger, or universal adapter. The IC provides automatic adapter-type detection and enumeration with a USB host or hub. The IC integrates independent battery charge switch, current sense circuit, MOSFET pass elements, thermal regulation circuitry, and eliminates the external reverse-blocking Schottky diode to create the simplest and smallest USB-compliant charging solution.
The IC includes automated detection of charge adapter type, making it possible to distinguish USB 2.0 device, USB charger, dedicated charger devices as well as standard input adapters. See Table 2 in the full data sheet. When enumeration is enabled, the IC automatically negotiates with a USB host, making it possible to achieve the highest-charging current available from a USB 2.0 device or USB charger without processor intervention. The adapter type detection is compliant with USB 2.0 as well as battery charging Specification Revision 1.1.
The IC controls the charging sequence for single-cell Li+ batteries from battery detection, prequalification, fast charge, top-off, and charge termination. Charging is controlled using constant current, constant voltage and constant die-temperature (CCCVCTj) regulation for safe operation under all conditions. The IC is also compliant with JEITA battery charging requirements.
The Smart Power Selector™ feature makes the best use of limited USB or adapter power. Battery charge current is set independent of the input current limit. Power not used by the system charges the battery. The battery assists the input source when needed. System voltage is maintained by allowing the application to operate without a battery, a discharged battery, or a dead battery. Automatic input selection switches the system from battery to external power.
The I²C interface provides full programmability of battery charge characteristics, input current limit, and protection features. This provides flexibility for use with a wide range of adapter and battery sizes.
Other features include undervoltage lockout (UVLO), overvoltage protection (OVP), charge status flag, charge fault flag, input power-OK monitor, battery detection, JEITA-compliant charging, charge timer, 3.3V/10mA auxiliary output, and an external power-on switch.
The IC includes automated detection of charge adapter type, making it possible to distinguish USB 2.0 device, USB charger, dedicated charger devices as well as standard input adapters. See Table 2 in the full data sheet. When enumeration is enabled, the IC automatically negotiates with a USB host, making it possible to achieve the highest-charging current available from a USB 2.0 device or USB charger without processor intervention. The adapter type detection is compliant with USB 2.0 as well as battery charging Specification Revision 1.1.
The IC controls the charging sequence for single-cell Li+ batteries from battery detection, prequalification, fast charge, top-off, and charge termination. Charging is controlled using constant current, constant voltage and constant die-temperature (CCCVCTj) regulation for safe operation under all conditions. The IC is also compliant with JEITA battery charging requirements.
The Smart Power Selector™ feature makes the best use of limited USB or adapter power. Battery charge current is set independent of the input current limit. Power not used by the system charges the battery. The battery assists the input source when needed. System voltage is maintained by allowing the application to operate without a battery, a discharged battery, or a dead battery. Automatic input selection switches the system from battery to external power.
The I²C interface provides full programmability of battery charge characteristics, input current limit, and protection features. This provides flexibility for use with a wide range of adapter and battery sizes.
Other features include undervoltage lockout (UVLO), overvoltage protection (OVP), charge status flag, charge fault flag, input power-OK monitor, battery detection, JEITA-compliant charging, charge timer, 3.3V/10mA auxiliary output, and an external power-on switch.
Key Features
- Enables Charging from a USB Port
- Automatic Detection of Adapter Type
- Input Current Up to 1500mA and Charging Current Up to 900mA
- Enumeration Without Processor Intervention
- Supports USB Low-Speed and Full-Speed
- Compliant with USB 2.0 Specification and Battery Charging Specification (Revision 1.1)
- Compliant with Next Generation Low-Voltage Li-Ion Battery Profiles
- Input Overvoltage Protection Up to 16V
- Smart Power Selector Allows Power Path Operation with Discharged or No Battery
- Battery Detection Including Packs with Open Protectors
- Thermal Regulation Prevents Overheating
- LED Indicator for Charge Done, Precharge, and Time/Temperature Error
- Serial (400kHz) I²C-Compatible Interface
- 6µA (typ) Shutdown Current
- 2.44mm x 2.44mm, 25-Bump WLP Package
MAX14970
Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation
Drive SATA Gen III Signals in a Low-Power Robust Design
Description
The MAX14970 dual-channel buffer with input equalization and preemphasis is ideal to redrive internal serial-ATA (SATA) 1i, 2i, and 3i signals as well as eSATA 1m and 2m signals. The device features high electrostatic discharge (ESD) ±8kV Human Body Model (HBM) protection. The device can be placed near a SATA connector on the motherboard to overcome board losses and guarantee SATA compliance. The device is SATA specification version 3.0 (gold standard) compliant and can also be pin-configured for SATA specification version 2.6 (gold standard) compliance.
The device features hardware SATA-drive cable detection that automatically places the device into a standby mode that consumes less than 20μA (typ) standby current when no drive is connected. In addition, the device features an independent channel dynamic power-down mode where power consumption is reduced when no input signal is present. The device maintains output common-mode levels to meet internal SATA version 3.0 standards and prevent delays when coming out of low-power mode. The device preserves signal integrity at the receiver by reestablishing full output levels and reducing the total system jitter (TJ) by providing equalization. The device features channel-independent digital preemphasis controls to drive SATA outputs over longer trace lengths to meet internal SATA specifications. SATA out-of-band (OOB) signaling is supported using high-speed out-of-band signal detection on the inputs, and squelch on the corresponding outputs. Inputs and outputs are all internally 50Ω terminated and must be AC-coupled to the SATA controller IC and SATA device.
The device operates from a single +3.3V (typ) supply, is available in a small, 4mm x 4mm TQFN package with flow-through traces for ease of layout, and is specified over the extended -40°C to +85°C operating temperature range.
The device features hardware SATA-drive cable detection that automatically places the device into a standby mode that consumes less than 20μA (typ) standby current when no drive is connected. In addition, the device features an independent channel dynamic power-down mode where power consumption is reduced when no input signal is present. The device maintains output common-mode levels to meet internal SATA version 3.0 standards and prevent delays when coming out of low-power mode. The device preserves signal integrity at the receiver by reestablishing full output levels and reducing the total system jitter (TJ) by providing equalization. The device features channel-independent digital preemphasis controls to drive SATA outputs over longer trace lengths to meet internal SATA specifications. SATA out-of-band (OOB) signaling is supported using high-speed out-of-band signal detection on the inputs, and squelch on the corresponding outputs. Inputs and outputs are all internally 50Ω terminated and must be AC-coupled to the SATA controller IC and SATA device.
The device operates from a single +3.3V (typ) supply, is available in a small, 4mm x 4mm TQFN package with flow-through traces for ease of layout, and is specified over the extended -40°C to +85°C operating temperature range.
Key Features
-
Robust Solution for Harsh Environments
- Extended Temp Rating: -40°C to +85°C
- High ESD Protection on All Pins: ±8kV (HBM)
- Package for Resistance to Vibration/Shocks
-
Unique Power Saving Design
- Standby State: < 1mW (typ)
- Dynamic Power-Down State: Reduced
- Idle State: 52.8mW (typ)
- Active State: 231mW (typ)
-
Design Flexibility
- Input Equalization and Selectable Output Preemphasis
- Single 3.3V Supply Operation
- SATA 3i (6.0Gbps), SATA 2i/2m (3.0Gbps), and SATA 1i/1m(1.5Gbps) Compatible
