LT1620CMS8#PBF

LT ®1620 rail-to-rail current sense amplifier simplifies the design of high performance, controlled current battery charging circuits when used in conjunction with a current mode PWM controller IC. The LT1620 regulates average output current independent of input and output voltage variations. Output current can be easily adjusted via a programming voltage applied to the LT1620’s PROG pin. Most current mode PWM controllers have limited output voltage range because of common mode limitations on the current sense inputs. Typical applications include high current battery chargers, high output voltage DC/DC converters, constant current sources, overcurrent fault protectors.

• Accurate output current programming
• 32V max input common mode range
• 80dB typ amplifier voltage gain at 1V ≤ VIOUT ≤ 3V
• 20ns typ input bias current
• 7mV typ input offset voltage at IIOUT = 130µA
• Level shifted current sense output for current mode PWM controllers
• Can be used for NiCd, NiMH, lead-acid and lithiumIon battery charging
• Greater than 96% efficiency possible in charger applications
• 8 lead MSOP package
• Operating temperature range from 0 to 70°C

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