LTC4008EGN#TRPBF

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

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