MAX1873TEEE ,Simple Current-Limited Switch-Mode Li Charger ControllerApplicationsMAX1873REEE -40°C to +85°C 16 QSOPNotebook ComputersMAX1873SEEE -40°C to +85°C 16 QSOPP ..
MAX1873TEEE ,Simple Current-Limited Switch-Mode Li Charger ControllerELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = V = V = 18V, V = V , V = V /2. MAX1873R: V = V ..
MAX1873TEEE ,Simple Current-Limited Switch-Mode Li Charger ControllerFeaturesThe low-cost MAX1873R/S/T provides all functions Low-Cost and Simple Circuitneeded to simp ..
MAX1873TEEE ,Simple Current-Limited Switch-Mode Li Charger ControllerFeaturesThe low-cost MAX1873R/S/T provides all functions Low-Cost and Simple Circuitneeded to simp ..
MAX1873TEEE+T ,Simple Current-Limited Switch-Mode Li+ Charger ControllerApplicationsMAX1873REEE -40°C to +85°C 16 QSOPNotebook ComputersMAX1873SEEE -40°C to +85°C 16 QSOPP ..
MAX1874ETE ,Dual-Input / USB/AC Adapter / 1-Cell Li+ Charger with OVP and Thermal RegulationELECTRICAL CHARACTERISTICS(V = V = V = V = V = 5V, V = 4.2V, V = V / 2, Circuit of Figure 2, T = 0° ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX491, and MAX1487 are not limited, allowing them toMAX3460–MAX3464: +5V, Fail-Safe, 2 ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationscations are obtained using the MAX488–MAX491, whileMAX3080–MAX3089: Fail-Safe, High-Spe ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX1487 are low-power transceivers for RS-485 and RS-MAX3430: ±80V Fault-Protected, Fai ..
MAX481CSA+ ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX491, and MAX1487 are not limited, allowing them toMAX3460–MAX3464: +5V, Fail-Safe, 2 ..
MAX481CSA+T ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 Transceivers
MAX1873REEE-MAX1873SEEE-MAX1873TEEE
Simple Current-Limited Switch-Mode Li Charger Controller
General DescriptionThe low-cost MAX1873R/S/T provides all functions
needed to simply and efficiently charge 2-, 3-, or 4-
series lithium-ion cells at up to 4A or more. It provides a
regulated charging current and voltage with less than
±0.75% total voltage error at the battery terminals. An
external P-channel MOSFET operates in a step-down
DC-DC configuration to efficiently charge batteries in
low-cost designs.
The MAX1873R/S/T regulates the battery voltage and
charging current using two control loops that work
together to transition smoothly between voltage and
current regulation. An additional control loop limits cur-
rent drawn from the input source so that AC adapter
size and cost can be minimized. An analog voltage out-
put proportional to charging current is also supplied so
that an ADC or microcontroller can monitor charging
current.
The MAX1873 may also be used as an efficient current-
limited source to charge NiCd or NiMH batteries in mul-
tichemistry charger designs. The MAX1873R/S/T is
available in a space-saving 16-pin QSOP package. Use
the evaluation kit (MAX1873EVKIT) to help reduce
design time.
ApplicationsNotebook Computers
Portable Internet Tablets
2-, 3-, or 4-cell Li+ Battery Pack Chargers
6-, 9-, or 10-cell Ni Battery Pack Chargers
Hand-Held Instruments
Portable Desktop Assistants (PDAs)
Desktop Cradle Chargers
FeaturesLow-Cost and Simple CircuitCharges 2-, 3-, or 4-Series Lithium-Ion CellsAC Adapter Input-Current-Limit LoopAlso Charges Ni-Based BatteriesAnalog Output Monitors Charge Current±0.75% Battery-Regulation Voltage5µA Shutdown Battery CurrentInput Voltage Up to 28V200mV Dropout Voltage/100% Duty CycleAdjustable Charging Current300kHz PWM Oscillator Reduces NoiseSpace-Saving 16-Pin QSOPMAX1873 Evaluation Kit Available to Speed
Designs
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
Ordering Information
Selector Guide
Typical Operating Circuit
Pin Configuration appears at end of data sheet.
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CSSP, CSSN, DCIN to GND...................................-0.3V to +30V
VL, ICHG/EN to GND................................................-0.3V to +6V
VH, EXT to DCIN.......................................................-6V to +0.3V
VH, EXT to GND......................................(VDCIN+ 0.3V) to -0.3V
EXT to VH.................................................................+6V to -0.3V
DCIN to VL..............................................................+30V to -0.3V
VADJ, REF, CCI, CCV, CCS,
IOUT to GND.............................................-0.3V to (VL + 0.3V)
BATT, CSB to GND.................................................-0.3V to +20V
CSSP to CSSN.......................................................-0.3V to +0.6V
CSB to BATT..........................................................-0.3V to +0.6V
VL Source Current............................................................+50mA
VH Sink Current................................................................+40mA
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C..........+667mW
Operating Temperature Range
MAX1873_EEE................................................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA
= 0°C to +85°C. Typical values are at TA= +25°C, unless
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA
= -40°C to +85°C. Typical values are at TA= +25°C,
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA
= -40°C to +85°C. Typical values are at TA= +25°C,
Note 1:While it may appear possible to set the Battery Regulation Voltage higher than the Battery Overvoltage Cutoff Threshold, this
cannot happen because both parameters are derived from the same reference and track each other.
Note 2:Specifications to -40°C are guaranteed by design, not production tested.
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger Controller
Typical Operating Characteristics(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA= +25°C, unless otherwise noted).
MAX1873
Simple Current-Limited Switch-Mode
Li+ Charger ControllerMAX1873S (3-CELL)
EFFICIENCY vs. INPUT VOLTAGE
MAX1873 toc07
INPUT VOLTAGE (V)
EFFICIENCY (%)20162428
MAX1873T (4-CELL)
EFFICIENCY vs. INPUT VOLTAGE
MAX1873 toc08
INPUT VOLTAGE (V)
EFFICIENCY (%)
CHARGING CURRENT
vs. SYSTEM LOAD CURRENT
MAX1873 toc10
SYSTEM LOAD CURRENT (A)
CHARGING CURRENT (A)
4-CELL BATTERY VOLTAGE AND
CHARGING CURRENT vs. TIME
MAX1873 toc09
TIME (MINUTES)
BATTERY VOLTAGE (V)
CHARGING CURRENT (A)
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 18V, VICHG/EN= VREF, VVADJ= VREF/2. MAX1873R: VBATT= VCSB= 8.4V;
MAX1873S: VBATT= VCSB= 12.6V; MAX1873T: VBATT= VCSB= 16.8V; TA= +25°C, unless otherwise noted).
