LTC4008EGN-1#PBF

LTC4008 is a constant-current/constant-voltage charger controller. The PWM controller uses a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. Charging current is programmable with a sense resistor and programming resistor to ±4% typical accuracy. Charging current can be monitored as a voltage across the programming resistor. An external resistor divider and precision internal reference set the final float voltage. It includes a thermistor sensor input that will suspend charging if an unsafe temperature condition is detected and will automatically resume charging when battery temperature returns to within safe limits; a FAULT pin indicates this condition. A FLAG pin indicates when charging current has decreased below 10% of the programmed current. It is used in application such as notebook computers, portable instruments, battery backup systems etc.

• General purpose charger controller
• High conversion efficiency upto 96%
• Output currents exceeding 4A, voltage accuracy is ±0.8%
• AC adapter current limiting maximizes charge rate
• Thermistor input for temperature qualified charging
• Wide input voltage range is 6V to 28V, wide output voltage is 3V to 28V
• Charging current monitor output
• Regulator maximum duty cycle is 99% typ at (VCSP = VBAT, TA = 25°C)
• Operating temperature is -40°C to 125°C
• Package style is 20-lead narrow plastic SSOP

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