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Switch Mode Lithium-Ion Battery Charger Controller (Rev. B)
Texas Instruments
Description
The UCC3956 family of switch-mode lithium-ion battery-charger controllers accurately control lithium-ion battery charging with a highly-efficient average-current-control loop. This chip is designed to work as a stand-alone charger controller for a single-cell or multiple-cell battery pack. This chip combines charge-state logic and average-current PWM control circuitry with a 14-bit counter to program the overcharge time. The charge-state logic indicates current-or voltage-control depending on the charge state. The chip includes undervoltage lockout (UVLO) circuitry to ensure sufficient supply voltage is present before output switching starts. Additional circuit blocks include a differential-current-sense amplifier, a 1% voltage reference, voltage- and current-error amplifiers, PWM latch, charge-state decode bits, and a 500-mA output driver.
Features
Precision 4.1 V Reference (1%) High-Efficiency Battery Charger Solution High-Side or Low-Side Switch-Mode Current-Sensing Average-Current-Mode Control from Trickle to Overcharge Resistor-Programmable Charge Currents Internal State Logic Provides Four Charge States Programmable Overcharge Time CHG Pin Initiates Charging Output-Status Bits Report Charge State
Related Datasheets
| Part Number | Description | Category |
| • BQ2000 | Programmable Multi-Chemistry Fast-Charge Management IC (Rev. C) | ICs, Interface |
| • BQ2004 | Fast-Charge IC (Rev. B) | ICs, Interface |
| • BQ2031 | Lead-Acid Fast-Charge IC | ICs, Interface |
| • BQ2057W | Advanced Linear Charge Mgmt IC for Single/Two-Cell Lithium-Ion & Lithium-Polymer (Rev. F) | ICs, Interface |
| • BQ24020 | Single-Chip Li-Ion & Li-Pol Charger IC w/Autonomous USB-Port & AC Adapt (Rev. E) | ICs, Interface |
| • BQ24032A | Single-Chip Charge and System Power-Path Management IC (bqTINY-III) (Rev. G) | ICs, Interface |
| • BQ24105 | Synchronous Switchmode, Li-Ion & Li-Pol Charge Mngmt IC (bqSwitcher) (Rev. L) | ICs, Interface |
| • UC2906 | Sealed Lead-Acid Battery Charger (Rev. C) | ICs, Interface |
| • UC3906 | Sealed Lead-Acid Battery Charger (Rev. C) | ICs, Interface |
| • UC3909 | Switchmode Lead-Acid Battery Charger | ICs, Interface |
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