MAX1909ETI Maxim Integrated Products, MAX1909ETI Datasheet
MAX1909ETI
Specifications of MAX1909ETI
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MAX1909ETI Summary of contents
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... Current Drawn from AC Input Source AC Adapter Presence ♦ 17.65V (max) Battery Voltage ♦ Maximum 28V Input Voltage ♦ Greater than 95% Efficiency ♦ Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc. PART MAX1909ETI MAX1909ETI+ MAX8725ETI MAX8725ETI+ + Denotes lead-free package. ✕ 5mm thin Applications AC ADAPTER: INPUT ...
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Multichemistry Battery Chargers with Automatic System Power Selector ABSOLUTE MAXIMUM RATINGS DCIN, CSSP, CSSN, SRC, ACOK to GND..............-0.3V to +30V DHIV ........................................................…SRC + 0.3, SRC - 6V DHI, PDL, PDS to GND ...............................-0. BATT, CSIP, CSIN to GND ...
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Multichemistry Battery Chargers with Automatic ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL Charge-Current Accuracy V Default Threshold ...
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Multichemistry Battery Chargers with Automatic System Power Selector ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL SUPPLY AND ...
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Multichemistry Battery Chargers with Automatic ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL DHIV Sink Current DHI On-Resistance ...
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Multichemistry Battery Chargers with Automatic System Power Selector ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL PDL Turn-On ...
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Multichemistry Battery Chargers with Automatic ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL Charge-Current Accuracy V ICTL Default ...
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Multichemistry Battery Chargers with Automatic System Power Selector ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL LDO Undervoltage-Lockout ...
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Multichemistry Battery Chargers with Automatic ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure DCIN CSSP CSSN REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T PARAMETER SYMBOL MODE Input High Voltage ACOK ...
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Multichemistry Battery Chargers with Automatic System Power Selector (Circuit of Figure 20V, charge current = 3A, 4 Li+ series cells, T DCIN LINE-TRANSIENT RESPONSE 500μs/div LDO LINE REGULATION 0.10 0.05 0 -0.05 -0. INPUT VOLTAGE ...
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Multichemistry Battery Chargers with Automatic (Circuit of Figure 20V, charge current = 3A, 4 Li+ series cells, T DCIN SWITCHING FREQUENCY vs. V 500 450 400 350 300 250 200 150 100 ...
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Multichemistry Battery Chargers with Automatic System Power Selector (Circuit of Figure 20V, charge current = 3A, 4 Li+ series cells, T DCIN PDL-PDS SWITCHING, AC ADAPTER INSERTION SYSTEM LOAD V PDL 100μs/div PDS-PDL SWITCHOVER, BATTERY INSERTION CONDITIONING ...
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Multichemistry Battery Chargers with Automatic PIN NAME 1 DCIN DC Supply Voltage Input. Bypass DCIN with a 1μF capacitor to power ground. 2 LDO Device Power Supply. Output of the 5.4V linear regulator supplied from DCIN. Bypass with a 1μF ...
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Multichemistry Battery Chargers with Automatic System Power Selector AC ADAPTER OUTPUT VOLTAGE: 12.6V CHARGE I LIMIT: 3. 590kΩ 196kΩ 1% LDO OUTPUT LDO (INPUT I LIMIT: 7.5A) R8 Ω 1M LDO TO HOST SYSTEM LDO R9 ...
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Multichemistry Battery Chargers with Automatic AC ADAPTER OUTPUT VOLTAGE: 16. 590kΩ 196kΩ 1μF D/A OUTPUT OPEN-DRAIN OUTPUTS LDO R8 1MΩ INPUT OUTPUT A/D INPUT C14 R9 0.1μF 10kΩ HOST LDO R21 R19, R20 10kΩ ...
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Multichemistry Battery Chargers with Automatic System Power Selector MAX8725 ONLY PKPRES 0.9 * LDO 0.8V GND BATT DCIN GND CCS CLS CSSP LEVEL SHIFTER CSSN CSIP LEVEL SHIFTER CSIN ICTL CCI BATT MAX1909 ONLY BATT_UV CELL SELECT 3.0V/CELL LOGIC AND ...
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Multichemistry Battery Chargers with Automatic Detailed Description The MAX1909/MAX8725 include all of the functions necessary to charge Li+, NiMH, and NiCd batteries. A high-efficiency, synchronous-rectified step-down DC- DC converter is used to implement a precision con- stant-current, constant-voltage charger with ...
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Multichemistry Battery Chargers with Automatic System Power Selector The input range for ICTL 3.6V on the MAX1909, and 0 to 3.2V on the MAX8725. The charger shuts down if ICTL is forced below 0.75V for the MAX1909 ...
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Multichemistry Battery Chargers with Automatic The body diode of the PDL switch prevents the voltage on the power source output from collapsing. Charging can also be inhibited by driving ICTL below 0.035V, which suspends switching and pulls CCI, CCS, and ...
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Multichemistry Battery Chargers with Automatic System Power Selector AC ADAPTER MAX1909 MAX8725 IMAX 1.94V COMP IMIN 0.15V ZCMP 0.1V LVC LVC CCV CCI R CCV CCV Figure 4. DC-DC Converter Functional Diagram 20 ______________________________________________________________________________________ CSSP CSSN CSS 20X R Q ...
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Multichemistry Battery Chargers with Automatic • IMIN: Compares the control point (LVC) against 0.15V (typ). If IMIN output is low, then a new cycle cannot begin. This comparator determines whether the regulator operates in discontinuous mode. • IMAX: Compares the ...
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Multichemistry Battery Chargers with Automatic System Power Selector In discontinuous mode, a new cycle is not started until the LVC voltage rises above 0.15V. Discontinuous- mode operation can occur during conditioning charge of overdischarged battery packs, when the charge cur- ...
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Multichemistry Battery Chargers with Automatic The poles and zeros of the voltage-loop transfer function are listed from lowest frequency to highest frequency in Table 1. Near crossover, C has a much lower impedance CV than R . Since C is ...
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Multichemistry Battery Chargers with Automatic System Power Selector GM OUT CCI GMI OGMI ICTL Figure 7. CCI Loop Diagram This describes a single-pole system. Since OUT × A CSI the loop transfer function simplifies ...
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Multichemistry Battery Chargers with Automatic 100 -20 -40 0 FREQUENCY (Hz) Figure 10. CCS Loop Response The loop transfer function is given by: = × × × LTF GMS ...
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... IRC LRC-LR2010-01-R010-F 0.015Ω ±1%, 0.5W sense resistor (2010) RS2 1 Vishay Dale WSL2010 0.015 1.0% IRC LRC-LR2010-01-R015-F MAX1909ETI/MAX8725ETI (28-pin thin U1 1 QFN-EP) for these devices focus on the challenge of obtaining high load-current capability when using high-voltage (>20V) AC adapters. Low-current applications usually require less attention ...
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Multichemistry Battery Chargers with Automatic Choose a low-side MOSFET that has the lowest possi- ble on-resistance (R ), comes in a moderate- DS(ON) sized package, and is reasonably priced. Make sure that the DLO gate driver can supply sufficient current ...
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Multichemistry Battery Chargers with Automatic System Power Selector The ripple current is determined by: Δ BATT OFF where 2.5µ OFF DCIN BATT V < 0.88 V BATT DCIN or 0.3µs ...
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Multichemistry Battery Chargers with Automatic e) Connect C1 and C2 to the high-side MOSFET (10mm max length). Return these capacitors to the power ground plane. f) Minimize the LX node (MOSFETs, rectifier cath- ode, inductor (15mm max length)). Ideally, surface-mount ...
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... 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. 30 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...