LT1513-2IR#PBF

LT1513-2 is a 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. These topologies allow the current sense circuit to be ground referred and completely separated from the battery itself, simplifying battery switching and system grounding problems. In addition, these topologies allow charging even when the input voltage is lower than the battery voltage. It can also drive a CCFL Royer converter with high efficiency in floating or grounded mode. It is widely used in application such as 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 etc.

• 1% voltage accuracy for rechargeable lithium batteries
• 0mV current sense voltage for easy current programming
• Battery can be directly grounded
• Charging current easily programmable or shut down
• Charger input voltage may be higher, equal to or lower than battery voltage
• Switching frequency is 500KHz typical at (2.7V ≤ VIN ≤ 25V, VIN = 5V, VC = 0.6V)
• Supply current is 4mA typical at (2.7V ≤ VIN ≤ 25V)
• Shutdown supply current is 12µA typical at (VIN = 5V, VC = 0.6V, VFB = VREF, IFB = 0V, VSW)
• Operating junction temperature is -40°C to 125°C
• Package style is 7-lead plastic DD

注释

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