| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
816 pcs
|
816 pcs | On Request | 1 | On Request | On Request | 2018 | On Request | On Request |
| Category | |
| Manufacturer Name | |
| SVHC Present | |
| Tape & Reel |
The LTC4089EDJC#TRPBF is an integrated circuit designed for battery charging applications, manufactured by LT. This component features a sophisticated battery temperature qualification system utilizing an NTC thermistor. It includes under-voltage lockout (UVLO) circuits for both current limit and charger functions, providing protection against reverse current and ensuring proper operation within specified voltage ranges. The device also supports a suspend mode, intended to comply with USB power specifications, reducing input current draw to 50μA when activated.
The NTC thermistor circuitry allows the charger to enter hold mode if the battery temperature becomes too hot (above 50°C) or too cold (below 0°C), based on resistance thresholds relative to a nominal resistor (R_NOM). The hot and cold comparators have approximately 3°C of hysteresis to prevent oscillation. The charger UVLO has a 125mV hysteresis, and the current limit UVLO also has 125mV hysteresis. The charger will not exit shutdown until V_OUT exceeds V_BAT by 50mV, and current limit circuits will not exit shutdown until V_OUT falls 50mV below V_IN.
This IC is supplied in a DDC-8 surface mount package and is delivered on tape and reel. The suspend mode is activated by forcing the SUSP pin above 2.3V, while charging remains unaffected if power is applied to the HVIN pin.
The charger enters hold mode when the NTC thermistor resistance drops to 0.41 times the value of R_NOM, approximately 4.1k, corresponding to 50°C.
The charger enters hold mode when the NTC thermistor resistance increases to 2.82 times the value of R_NOM, corresponding to 0°C.
The hot and cold comparators each have approximately 3°C of hysteresis.
The current limit UVLO circuit has a built-in hysteresis of 125mV.
The charger circuits will not come out of shutdown until V_OUT exceeds V_BAT by 50mV.
Suspend mode can be activated by forcing the SUSP pin greater than 2.3V.
