MAX17005B/MAX17006B/MAX17015B 19-4576 Rev 1 7/09 1.2MHz, Low-Cost, High-Performance Chargers General Description Features The MAX17005B/MAX17006B/MAX17015B are high-fre- High Switching Frequency (1.2MHz) quency multichemistry battery chargers. These circuits Controlled Inductor Current-Ripple Architecture feature a new high-frequency current-mode architecture Reduced BOM Cost that significantly reduces component size and cost. The charger uses a high-side MOSFET with n-channel syn- Small Inductor and Output Capacitors chronous rectifier. Widely adjustable charge current, 0.4% Accurate Charge Voltage charge voltage, and input current limit simplify the con- 2.5% Accurate Input-Current Limiting struction of highly accurate and efficient chargers. The charge voltage and charge current are set with 3% Accurate Charge Current analog control inputs. The charge current setting can Single-Point Compensation also be adjusted with a PWM input. High-accuracy cur- rent-sense amplifiers provide fast cycle-by-cycle cur- Monitor Outputs for rent-mode control to protect against short circuits to the 2.5% Accurate Input Current Limit battery and respond quickly to system load transients. 2.5% Battery Discharge Current In addition, the charger provides a high-accuracy ana- (MAX17015B Only) log output that is proportional to the adapter current. In AC Adapter Detection the MAX17015B, this current monitor remains active Analog/PWM Adjustable Charge-Current Setting when the adapter is absent to monitor battery dis- charge current. Battery Voltage Adjustable for 3 and 4 Cells The MAX17005B charges three or four Li+ series cells, (MAX17005B) or 2 and 3 Cells (MAX17006B) and the MAX17006B charges two or three Li+ series Adjustable Battery Voltage (4.2V to 4.4V/Cell) cells. The MAX17015B adjusts the charge voltage set- ting and the number of cells through a feedback resis- Cycle-by-Cycle Current Limit tor-divider from the output. All variants of the charger Battery Short-Circuit Protection can provide at least 4A of charge current with a 10m Fast Response for Pulse Charging sense resistor. Fast System-Load-Transient Response The charger utilizes a charge pump to control an n-channel Programmable Charge Current < 5A adapter selection switch. The charge pump remains active even when the charger is off. When the adapter Automatic System Power Source Selection with is absent, a p-channel MOSFET selects the battery. n-Channel MOSFET The MAX17005B/MAX17006B/MAX17015B are avail- Internal Boost Diode able in a small, 4mm x 4mm x 0.8mm 20-pin, lead-free +8V to +26V Input Voltage Range TQFN package. An evaluation kit is available to reduce design time. Applications Ordering Information Notebook Computers PART TEMP RANGE PIN-PACKAGE Tablet PCs MAX17005BETP+ -40C to +85C 20 TQFN-EP** MAX17006BETP+ -40C to +85C 20 TQFN-EP** Portable Equipment with Rechargeable Batteries MAX17015BETP+ -40C to +85C 20 TQFN-EP** +Denotes a lead(Pb)-free/RoHS-compliant package. **EP = Exposed pad. Pin Configuration and Minimal Operating Circuit appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE1.2MHz, Low-Cost, High-Performance Chargers ABSOLUTE MAXIMUM RATINGS DCIN, CSSP, CSSN, BATT, CSIN, CSIP, ACOK, DLO to PGND ...........................................-0.3V to (V + 0.3V) LDO PGND to AGND.................................................... -0.3V to +0.3V LX to AGND .......................................................-0.3V to +30V BST to LDO.............................................................-0.3V to +30V Continuous Power Dissipation (T = +70C) A 16-Pin TQFN (derate 16.9mW/C above +70C)....1349.1mW CSIP to CSIN, CSSP to CSSN .............................. -0.3V to +0.3V Operating Temperature Range ...........................-40C to +85C IINP, FB, ACIN, CC to AGND .....................-0.3V to (V + 0.3V) AA V , LDO, ISET, VCTL to AGND .............................-0.3V to +6V Junction Temperature......................................................+150C AA Storage Temperature Range .............................-60C to +150C DHI to LX...................................................-0.3V to (V + 0.3V) BST BST to LX..................................................................-0.3V to +6V Lead Temperature (soldering, 10s) .................................+300C 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. ELECTRICAL CHARACTERISTICS (Circuit of Figure 1, V = V = V = 19V, V = V = V = 16.8V, V = V , V = 1V, T = 0C to +85C, DCIN CSSP CSSN BATT CSIP CSIN VCTL AA ISET A unless otherwise noted. Typical values are at T = +25C.) A PARAMETER CONDITIONS MIN TYP MAX UNITS CHARGE-VOLTAGE REGULATION 2 cells, V = V (MAX17006B) 8.3664 8.40 8.4336 VCTL AGND 3 cells, V = V (MAX17005B/MAX17006B) 12.549 12.60 12.651 VCTL AA Battery Regulation-Voltage Accuracy 4 cells, V = V (MAX17005B) 16.733 16.80 16.867 V VCTL AGND FB accuracy using FB divider (MAX17015B) 2.0916 2.1 2.1084 (Note 1) FB Input Bias Current -1 +1 A V /2 AA 2 cells (MAX17006B), 4 cells (MAX17005B) 0 - 0.2 VCTL Range V V /2 AA 3 cells (MAX17005B/MAX17006B) V AA + 0.2 VCTL Gain V /V 5.85 6 6.15 V/V CELL VCTL VCTL Input Bias Current V = V and VCTL = V -1 +1 A VCTL AGND AA CHARGE-CURRENT REGULATION ISET Range 0 V/2 V AA ISET = 1.4V 80 ISET Full-Scale Setting mV ISET = 99.9% duty cycle 60 58.2 60 61.8 mV V = V /4 or ISET ISET AA = 99.9% duty cycle -3 +3 % Full-Charge Current Accuracy (CSIP to CSIN) 38.2 40 41.8 mV V = V /6 or ISET ISET AA V = 1V to 16.8V BATT = 66.7% duty cycle -4.5 +4.5 % 1.4 3 4.6 mV V = V /80 or ISET ISET AA Trickle Charge-Current Accuracy = 5% duty cycle -52 +52 % Charge-Current Gain Error Based on V = V /4 and V = V/80 -2 +2 % ISET VAA ISET VAA Charge-Current Offset Error Based on V = V /4 and V = V/80 -1.4 +1.4 mV ISET VAA ISET VAA BATT/CSIP/CSIN Input-Voltage Range 0 24 V ISET falling 21 26 31 ISET Power-Down Mode Threshold mV ISET rising 33 40 47 2 MAX17005B/MAX17006B/MAX17015B