ADP3408 Analog Devices, ADP3408 Datasheet
ADP3408
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ADP3408 Summary of contents
Page 1
... RTC alarm. The charge circuit maintains low current charging during the initial charge phase and provides an end-of-charge signal when a Li-ion battery is being charged. The ADP3408 is specified over the temperature range of –20°C to +85°C and is available in a narrow body TSSOP 28-lead package LFCSP 32-lead package ...
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... UVLO HYSTERESIS DEEP DISCHARGED LOCKOUT ON THRESHOLD DEEP DISCHARGED LOCKOUT HYSTERESIS INPUT HIGH VOLTAGE (TCXOEN, SIMEN, CHGEN, GATEIN) PWRONIN (ADP3408-1.8) PWRONIN (ADP3408-2.5) INPUT LOW VOLTAGE (PWRONIN, TCXOEN, SIMEN, CHGEN, GATEIN) INPUT HIGH BIAS CURRENT (PWRONIN, TCXOEN, SIMEN, CHGEN, GATEIN) INPUT LOW BIAS CURRENT ...
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... VBAT = 3 500 µ –500 µ 0. – 0. MEM T D BATSNS/MVBAT TCXOEN = High Z O TCXOEN = Low TCXOEN = High –3– ADP3408 Min Typ Max 2.39 2.45 2.51 1.80 1.95 2.1 ° C 0.5 0.1 2.40 2. 2.66 2.715 2.77 2.711 2.750 2.789 2 1 0.22 160 310 ...
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... ADP3408 Parameter BATTERY CHARGER Charger Output Voltage Load Regulation CHRDET On Threshold CHRDET Hysteresis 4 CHRDET Off Delay CHRIN Supply Current BATTERY CHARGER Current Limit Threshold High Current Limit (UVLO Not Active) Low Current Limit (UVLO Active) ISENSE Bias Current End-of-Charge Signal Threshold ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3408 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... TCXO LDO Enable and MVBAT Enable No Connection –6– LFCSP (CP) SIMEN PIN 1 23 VRTCIN 2 VAN INDICATOR VRTC 3 22 VBAT BATSNS 4 21 VCORE ADP3408 MVBAT 5 TOP VIEW 20 VMEM ACP (Not to Scale) TOP VIEW CHRDET 6 19 VBAT2 18 VSIM CHRIN 7 GATEIN REV. A ...
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... OFF OFF OFF OFF OFF OFF OFF OFF –7– ADP3408 ON OFF ON OFF OFF OFF ON OFF OFF ON ON OFF ON OFF OFF ON ON OFF ...
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... ADP3408 –Typical Performance Characteristics 450 ALL LDO, MVBAT, REFOUT, 400 ON_MIN_LOAD (SIMEN = H, TCXOEN = H) 350 VSIM, VCORE, VMEM, VRTC, 300 ON_MIN_LOAD (SIMEN = H, TCXOEN = L) 250 200 VCORE, VMEM, VRTC, 150 ON_MIN_LOAD (SIMEN = L, TCXOEN = L) 100 3.0 3.5 4.0 4.5 5.0 5.5 VBAT – V TPC 1. Ground Current vs. Battery Voltage 180 160 ...
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... PWRONIN, Minimum Load (Part 1) PWRONIN (2V/DIV) REFOUT (100mV/DIV) VMEM (100mV/DIV) VTCXO (100mV/DIV) TIME – 20 s/DIV TPC 17. Turn On Transient by PWRONIN, Maximum Load (Part 2) –9– ADP3408 100mA LOAD 10mA VCORE 10mV/DIV TIME – 200 s/DIV TPC 12. VCORE Load Step PWRONIN (2V/DIV) REFOUT ...
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... ADP3408 80 REFOUT 70 60 VSIM VCORE 50 VAN 40 VTCXO 30 VMEM 20 10 FREQUENCY = 217Hz MAX LOADS 0 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 VBAT – V TPC 19. Ripple Rejection vs. Battery Voltage 4. 5. 250m SENSE 4.23 4.22 4.21 4.20 0 200 400 600 800 I – mA LOAD TPC 22. Charger V vs. I OUT LOAD ( 600 FULL LOAD MLCC CAPS 500 ...
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... CHGEN GATEIN ADP3408 D1 10BQ015 BATSNS BATTERY Q1 CHARGE SI3441DY CONTROLLER GATEDR ISENSE R1 C1 CHRIN (10V MAX) 0.2 1nF CHRDET –11– ADP3408 VRTCIN VBAT2 SIM LDO VBAT OUT VSIM VREF EN DGND DIGITAL CORE LDO VBAT VCORE OUT VREF PG EN DGND ANALOG LDO VBAT ...
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... CHRIN VSIM GATEIN RESET C5 GATEDR RESCAP 2.2 F DGND CHGEN ISENSE EOC C4 0 SIMEN NC 2 VRTCIN VAN 3 VRTC VBAT 4 VCORE BATSNS U1 5 ADP3408 VMEM MVBAT 6 CHRDET VBAT2 7 VSIM CHRIN 8 GATEIN NC GATEDR –12– CLKON REF VTCXO VAN C8 C9 C10 2.2 F 0.22 F 0.1 F VCORE VMEM C6 2.2 F VSIM ...
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... Figure 3 shows the external circuitry associated with the ADP3408. Only a minimal number of support components are required. Input Voltage The input voltage range of the ADP3408 5.5 V and is optimized for a single Li-ion cell or three NiMH cells. The type of battery, the package type, and the Core LDO output voltage all affect the amount of power that the ADP3408 needs to dissi- pate. The thermal impedance of the TSSOP package is 68° ...
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... Power ON/OFF I < I END CHARGE OF CHARGE The ADP3408 handles all issues regarding the powering ON and OFF of the handset possible to turn on the ADP3408 YES in three different ways: • Pulling the PWRONKEY Low EOC = HIGH • Pulling PWRONIN High • CHRIN exceeds CHRDET Threshold ...
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... Lithium Ion Charging For lithium ion charging, the CHGEN input must be low. This allows the ADP3408 to continue charging the battery at the full current. The full charge current can be calculated by using: 160 mV ...
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... VCORE is off to minimize power consumption. When VCORE is on, RESET is capable of driving 500 µA. Setting the Charge Current The ADP3408 is capable of charging both lithium ion and NiMH batteries. For NiMH batteries, the charge current is limited by the adapter. For lithium ion batteries, the charge current is programmed by selecting the sense resistor, R1 ...
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... Use the following general guidelines when designing printed circuit boards: 1. Connect the battery to the VBAT, VBAT2, and VRTCIN − VBAT (9) pins of the ADP3408. Locate the input capacitor as close to the pins as possible. 2. VAN and VTCXO capacitors should be returned to AGND. (10) 3. VCORE, VMEM, and VSIM capacitors should be returned to DGND. ...
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... ADP3408 LFCSP Layout Consideration The CSP package has an exposed die paddle on the bottom that efficiently conducts heat to the PCB. To achieve the optimum performance from the CSP package, special consideration must be given to the layout of the PCB. Use the following layout guidelines for the CSP package: 1 ...
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... COMPLIANT TO JEDEC STANDARDS MO-153AE 32-Lead Frame Chip Scale Package [LFCSP] (CP-32) Dimensions shown in millimeters 5.00 0.60 MAX BSC SQ 0.60 MAX 25 24 0.50 4.75 BSC TOP BSC SQ VIEW 0.50 0. 0.30 0.70 MAX 0.65 NOM 0.05 MAX 0.02 NOM 0.30 0.25 REF COPLANARITY 0.23 0.08 0.18 COMPLIANT TO JEDEC STANDARDS MO-220-VHHD-2 –19– ADP3408 0. 0.60 0.45 PIN 1 INDICATOR 32 1 3.25 BOTTOM SQ 3.10 VIEW 2. 3.50 REF ...
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... ADP3408 Revision History Location 11/02—Data Sheet changed from REV REV. A Changes to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Note added to FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ß Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Changes to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Updated PIN CONFIGURATIONS added . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Changes to PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Edits to Figures 1 and 2 captions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Edit to Figure 2 ...