MAX1758EAI+ Maxim Integrated Products, MAX1758EAI+ Datasheet
MAX1758EAI+
Specifications of MAX1758EAI+
Related parts for MAX1758EAI+
MAX1758EAI+ Summary of contents
Page 1
... TIMER2 13 16 FAULT 14 15 SSOP ________________________________________________________________ Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Stand-Alone, Switch-Mode o Stand-Alone Charger for Li+ Batteries o ±0.8% Battery Regulation Voltage Accuracy o Low-Dropout 98% Duty Cycle o Safely Precharges Near-Dead Cells o Continuous Voltage and Temperature Monitoring o 0.1µ ...
Page 2
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch ABSOLUTE MAXIMUM RATINGS DCIN, CSSP, CSSN, HSD to GND..........................-0.3V to +30V CSSP to CSSN.......................................................-0.6V to +0.6V BST to GND ............................................................-0.3V to +36V BST to LX..................................................................-0. PGND ..............................................-0.6V ...
Page 3
Li+ Battery Charger with Internal 28V Switch ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN HSD 10kΩ, T ISETIN ISETOUT REF THM PARAMETER SYMBOL CS to BATT ...
Page 4
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN HSD CSSP 10kΩ, T ISETIN ISETOUT REF THM PARAMETER SYMBOL ...
Page 5
Li+ Battery Charger with Internal 28V Switch ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN HSD 10kΩ, T ISETIN ISETOUT REF THM PARAMETER SYMBOL FASTCHG, FULLCHG, FAULT ...
Page 6
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN HSD CSSP 10kΩ, T ISETIN ISETOUT REF THM PARAMETER SYMBOL ...
Page 7
Li+ Battery Charger with Internal 28V Switch (Circuit of Figure 18V, V SHDN DCIN erwise noted.) BATTERY VOLTAGE vs. CHARGING CURRENT 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 0.2 0.4 0.6 0.8 1.0 ...
Page 8
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch PIN NAME Chip Power Supply. Output of the 5.4V linear regulator from DCIN. Bypass VL to GND with 2.2µF or larger 1 VL ceramic capacitor. Input Current Limit Adjust. Use a ...
Page 9
Li+ Battery Charger with Internal 28V Switch MBRS340 D1 D2 INPUT SUPPLY C3 1µF C4 0.1µF C17 1nF FULL CHARGE FAST CHARGE FAULT Figure 1. Typical Application Circuit Detailed Description The MAX1758 includes all of the functions necessary to charge ...
Page 10
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch Table 1. Charging State Table STATE From initial power-on or from done state if battery voltage < recharge volt- Reset age threshold DCIN or V > battery ...
Page 11
Li+ Battery Charger with Internal 28V Switch The MAX1758 includes a state machine that controls the charging algorithm. Figure 4 shows the state dia- gram. Table 1 is the charging state table. When power is applied, or SHDN input is ...
Page 12
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch CSS CSSP LEVEL SHIFT AND GAIN OF 10 CSSN ON CSI CS LEVEL SHIFT AND RCS GAIN OF 7 BATT ON ISETIN +1 3Rx ISETOUT +1 3Rx TO BDIV BATT CNTRL ...
Page 13
Li+ Battery Charger with Internal 28V Switch V DCIN V < UNDERVOLTAGE BATT THRESHOLD V > V DCIN PREQUAL FASTCHG = LOW FULLCHG = HIGH FAULT = HIGH TEMP NOT OK TEMP TEMP QUAL TEMP NOT OK Figure 4. State ...
Page 14
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch capacitor. This capacitor (between BST and LX) is charged through a diode from VL when LX is low. An internal N-channel MOSFET turns on momentarily after the high-side switch turns off, ...
Page 15
Li+ Battery Charger with Internal 28V Switch cell voltage limit battery regulation voltage is deter- mined, the VADJ voltage is calculated by the equation (9 (9 VADJ BATTR CELL is the programming ...
Page 16
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 28V Switch dissipation ratings more critical when using tantalum capacitors. The output filter capacitor is used to absorb the induc- tor ripple current. The output capacitor impedance must be significantly less than that ...
Page 17
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2001 Maxim Integrated Products ...