Bq2057w lithium ion low voltage drop linear (8.4v) charging management IC stock
describe
The benchmark bq2057 series of advanced lithium ion (Li ion) and lithium polymer (Li ion) linear charge management integrated circuits are designed for cost sensitive and compact portable electronic products. They combine high-precision current and voltage regulation, battery regulation, temperature monitoring, charge termination, charge state indication and autocomp charge rate compensation in only one 8-pin IC. MSOP, tssop and SOIC package options are suitable for a wide range of terminal applications.
Bq2057 uses an external thermistor to continuously measure the battery temperature. For safety reasons, bq2057 will inhibit charging until the battery temperature is within a user-defined threshold. Then, bq2057 charges the battery in three stages: regulation, constant current and constant voltage. If the battery voltage is below the low voltage threshold V (minutes), bq2057 will use low current precharge to adjust the battery.
The regulated charge rate is about 10% of the regulated current. Regulating the current also reduces the heat dissipation of the external communication element in the initial stage of the charge. After adjustment, bq2057 applies a constant current to the battery. An external inductive resistor sets the current. The inductive resistance can be on the high side or low side of the battery without additional components. The constant current phase continues until the battery reaches the charging regulation voltage.
features
Suitable for single battery (4.1 V or 4.2 V) and dual battery
(8.2 V or 8.4 V) lithium ion or lithium polymer package
A small amount of external data is required
assembly
0.3 V drop voltage to minimize heat
dissipation
Better than ± 1% voltage regulation accuracy
With preset voltage
Automatic compression, dynamic compensation
The internal impedance of the battery pack is reduced
Charging time
Before selecting battery temperature monitoring
During charging
Integrated voltage and current regulation
With programmable charging current and high or low side current sensing
Integrated cell conditioning for resuscitation
Deep discharge battery and minimize heat
Dissipation in the initial stage of charge
Single LED or dual LED charge state output
Or host processor interface
Automatic battery charging function
Minimum current charging terminal
Automatic low power sleep mode when VCC starts
Removed
EVMS can be used for rapid assessment
Packaging: 8-pin SOIC, 8-pin tssop, 8-pin
MSOP
The benchmark bq2057 series of advanced lithium ion (Li ion) and lithium polymer (Li ion) linear charge management integrated circuits are designed for cost sensitive and compact portable electronic products. They combine high-precision current and voltage regulation, battery regulation, temperature monitoring, charge termination, charge state indication and autocomp charge rate compensation in only one 8-pin IC. MSOP, tssop and SOIC package options are suitable for a wide range of terminal applications.
Bq2057 uses an external thermistor to continuously measure the battery temperature. For safety reasons, bq2057 will inhibit charging until the battery temperature is within a user-defined threshold. Then, bq2057 charges the battery in three stages: regulation, constant current and constant voltage. If the battery voltage is below the low voltage threshold V (minutes), bq2057 will use low current precharge to adjust the battery.
The regulated charge rate is about 10% of the regulated current. Regulating the current also reduces the heat dissipation of the external communication element in the initial stage of the charge. After adjustment, bq2057 applies a constant current to the battery. An external inductive resistor sets the current. The inductive resistance can be on the high side or low side of the battery without additional components. The constant current phase continues until the battery reaches the charging regulation voltage.
features
Suitable for single battery (4.1 V or 4.2 V) and dual battery
(8.2 V or 8.4 V) lithium ion or lithium polymer package
A small amount of external data is required
assembly
0.3 V drop voltage to minimize heat
dissipation
Better than ± 1% voltage regulation accuracy
With preset voltage
Automatic compression, dynamic compensation
The internal impedance of the battery pack is reduced
Charging time
Before selecting battery temperature monitoring
During charging
Integrated voltage and current regulation
With programmable charging current and high or low side current sensing
Integrated cell conditioning for resuscitation
Deep discharge battery and minimize heat
Dissipation in the initial stage of charge
Single LED or dual LED charge state output
Or host processor interface
Automatic battery charging function
Minimum current charging terminal
Automatic low power sleep mode when VCC starts
Removed
EVMS can be used for rapid assessment
Packaging: 8-pin SOIC, 8-pin tssop, 8-pin
MSOP