LT1513CR#PBF

LT®1513 is a 500KHz current mode switching regulator specially configured to create a constant- or programmable-current/constant-voltage battery charger. In addition to the usual voltage feedback node, it has a current sense feedback circuit for accurately controlling output current of a flyback or SEPIC (single-ended primary inductance converter) topology charger. In addition, these topologies allow charging even when the input voltage is lower than the battery voltage. This can also drive a CCFL Royer converter with high efficiency in floating or grounded mode. Accuracy of 1% in constant-voltage mode is perfect for lithium battery applications. Charging current can be easily programmed for all battery types. Typical applications are charging of NiCd, NiMH, lead-acid or lithium rechargeable cells, precision current limited power supply, constant-voltage/constant-current supply, transducer excitation, universal input CCFL driver.

• Charger input voltage may be higher, equal to or lower than battery voltage
• Charges any number of cells up to 20V, battery can be directly grounded
• 1% voltage accuracy for rechargeable lithium batteries
• 100mV current sense voltage for high efficiency
• 500KHz switching frequency minimizes inductor size
• Charging current easily programmable or shut down
• FB input current is 300nA typical (VFB=VREF, VIN=5V, VC=0.6V, VFB=VREF, IFB=0V)
• IFB input current is –200 to 0nA (VIFB=VIREF, VIN=5V, VC=0.6V, VFB=VREF, IFB=0V)
• 7-lead plastic DD package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party