Datasheet LTC4124 (Analog Devices) - 4

link to page 2 LTC4124
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted (Notes 2, 3). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IC/10 C/10 Current Threshold in Constant Voltage IBAT Falling, % of ICHG 10 % Mode Hysteresis 1 % tT Charge Termination Time l 2.2 3.0 4.0 hours tBB Bad Battery Detection Time l 30 45 60 mins VNTC(COLD) NTC Cold Threshold VNTC Rising, % of VCC l 73 75 77 % VNTC(HOT) NTC Hot Threshold VNTC Falling, % of VCC l 33 35 37 % VNTC(HYS) NTC Thresholds Hysteresis % of VCC 5 % RNTC(OPEN) NTC Open Circuit Input Resistance to VCC INTC = –25µA l 98.5 100 101.5 kΩ VNTC(DIS) NTC Disable Threshold VNTC Rising, % of VCC l 90 94 98 % Hysteresis % of VCC 5 %
Battery Discharging
Battery Discharge PowerPath Forward VBAT,VCC, IVCC = –1mA, VBAT ≥ VBAT_LBDIS 0 55 130 mV Regulation Voltage Battery PowerPath Forward Turn-On VBAT,VCC 100 mV Threshold Voltage Battery PowerPath Reverse Turn-Off VBAT,VCC, Not Charging –100 mV Threshold Voltage RDISCHG Discharge Switch On Resistance VBAT = 3.6V 0.5 Ω Maximum Battery Discharge Current VBAT = 3.6V 1.0 A Threshold for Safety Disconnect
Low Battery Disconnect
VBAT_LBDIS Low Battery Disconnect Voltage LBSEL = VCC, VBAT Falling l 3.136 3.200 3.264 V LBSEL = GND, VBAT Falling l 2.646 2.700 2.754 V IBAT(LEAK) Battery Leakage Current When Disconnected VBAT < VBAT_LBDIS l 0  50 nA
CHRG Status Pin
ICHRG(LKG) CHRG Open Drain Leakage Current VCHRG = 5V 1 µA ICHRG CHRG Pull Down Current VCHRG = 400mV 200 300 400 µA fBLINK(SLW) Blink Slow Frequency 0.6 0.8 1.1 Hz fBLINK(FAST) Blink Fast Frequency 4.5 6 8 Hz
Digital Input Pins (VSEL1, VSEL2, ISEL1, ISEL2, LBSEL, PRECHG)
VIL Input Voltage Low l 0.4 V VIH Input Voltage High l VCC – 0.4V V Input Leakage Current 0V ≤ VPIN ≤ VCC l –1 1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings temperature are assured by design, characterization and correlation with may cause permanent damage to the device. Exposure to any Absolute statistical process controls. Note that the maximum ambient temperature Maximum Rating condition for extended periods may affect device consistent with these specifications is determined by specific operating reliability and lifetime. conditions in conjunction with board layout, the rated package thermal
Note 2:
All currents into pins are positive; all voltages are referenced to impedance and other environmental factors. The junction temperature GND unless otherwise noted. (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and
Note 3:
The LTC4124 is tested under conditions such that T power dissipation (P J ≈ TA. The D, in Watts) according to the following formula: LTC4124E is guaranteed to meet specifications from 0°C to 85°C junction TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal temperature. Specifications over the –20°C to 85°C operating junction impedance. Rev. A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts