Datasheet ADP5065 (Analog Devices)

Fast Charge Battery Manager with Power Path and USB Compatibility Data Sheet ADP5065 FEATURES FUNCTIONAL BLOCK DIAGRAM 3 MHz switch mode charger ADP5065 1.25 A charge current from dedicated charger AC VBUS VINx SWx SYSTEM OR Up to 680 mA charging current from 500 mA USB host USB INDUCTOR Operating input voltage from 4.0 V up to 5.5 V 3MHz PGNDx Tolerant input voltage −0.5 V to +20 V (USB VBUS) CFILT BUCK Dead battery isolation FET between battery and ISO_Sx charger output IIN_EXT Battery thermistor input with automatic charger shutdown TRK_EXT CHARGER ISO_Bx SCL for when battery temperature exceeds limits CONTROL SDA BLOCK BAT_SNS Compliant with the JEITA Li-Ion battery charging + SYS_ON_OK THR Li-Ion temperature specification SYS_EN_OK flag to hold off system turn-on until battery is at V_WEAK_SET AGND PGNDx
001
minimum required level for guaranteed system startup
09370-
due to minimum battery voltage and/or minimum battery
Figure 1.
charge level requirements EOC programming with C/20, C/10 and specific current level selection APPLICATIONS Digital still cameras Digital video cameras Single cell Li-Ion portable equipment PDA, audio, GPS devices Mobile phones GENERAL DESCRIPTION
The ADP5065 charger is fully compliant with the USB 2.0, Based on the type of USB source, which is detected by an external USB 3.0, and USB Battery Charging Specification 1.1 and USB detection chip, the ADP5065 can be set to apply the correct enables charging via the mini USB VBUS pin from a wall current limit for optimal charging and USB compliance. charger, car charger, or USB host port. The ADP5065 comes in a very small and low profile 20-lead The ADP5065 operates from a 4 V to 5.5 V input voltage range WLCSP (0.5 mm pitch spacing) package. but is tolerant of voltages of up to 20 V. This alleviates the The overall solution requires only five small, low profile external concerns about the USB bus spiking during disconnect or components consisting of four ceramic capacitors (one of which connect scenarios. is the battery filter capacitor), one multilayer inductor. In addition The ADP5065 also features an internal FET between the dc-to- to these components, there is one optional dead battery situation dc charger output and the battery. This permits battery isolation default setting resistor. This configuration enables a very small and, hence, system powering under a dead battery or no battery PCB area to provide an integrated and performance enhancing scenario, which al ows for immediate system function on solution to USB battery charging and power rail provision. connection to a USB power supply.
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Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Recommended Input and Output Capacitance I2C-Compatible Interface Timing Specifications Timing Diagram Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Temperature Characteristics Typical Waveforms Theory of Operation Introduction Charger Modes Input Current Limit USB Compatibility Trickle Charge Mode Trickle Charge Mode Timer Weak Charge Mode (Constant Current) Fast Charge Mode (Constant Current) Fast Charge Mode (Constant Voltage) Fast Charge Mode Timer Watchdog Timer Safety Timer Charge Complete Recharge Battery Charging Enable/Disable Thermal Management Isothermal Charging Thermal Shutdown and Thermal Early Warning Fault Recovery Battery Isolation FET Battery Detection Battery Level Detection Battery (ISO_Bx) Short Detection Battery Pack Temperature Sensing Battery Thermistor Input JEITA Li-Ion Battery Temperature Charging Specification External Resistor for V_WEAK_SET I2C Interface Charger Operational Flowchart I2C Register Map Register Bit Descriptions Applications Information External Components Inductor Selection ISO_Sx (VOUT) and ISO_Bx Capacitor Selection VINx Capacitor Selection CFILT Capacitor Selection PCB Layout Guidelines Power Dissipation and Thermal Considerations Charger Power Dissipation Junction Temperature Factory-Programmable Options Packaging and Ordering Information Outline Dimensions Ordering Guide