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Technical content
Features
Up to 2A Programmable Charge Current No external MOSFET, Sense Resistor, or Blocking Diode Required Switch-model Charger for single cell Li-Ion Batteries Preset Charge Voltage with ±1% Accuracy Automatic Recharge 2.9V Trickle Charge Voltage C/10 Charge Termination Thermal Protection Charge Status Indicators for No Battery and Charge Failure Display
Applications
Portable Information Appliances Charging Docks & Cradles Cellular Phones & PDAs Handheld Computers Typical Application Circuit FP8202 LXVCC CHRG VBAT GND VS VIN LI-Ion BAT+ EN STDBY FP8202 LXVCC EN CHRG STDBY VBAT RTRICK GND VS TEMP NTC VIN LI-Ion BAT+ SOP-8L (EP) DFN-10L (EP)
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Function Block Diagram Vcc TEMP RTRICK EN GND 145°C TDie -80% 45% 2.9V VBAT 4.05V Charging Control - + STDBY CHRG Compensation Body Switcher VIN VBAT LX - + VBAT VS X12 - + VREF VREF 360KΩ 40KΩ OC Charge Status Indicators Charge Status CHRG (Red) STDBY (Green) In Charging ON OFF Charge Termination OFF ON UVLO, OverT, UnderT, NoBat(with TEMP used) OFF OFF
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. State Diagram Shutdown Mode Vcc < VUVLO Vcc < VBAT =Hi-Impedance =Hi-Impedance Pre-Charge Mode Charge Current=1/10．IBAT =Strong Pull-Low =Hi-Impedance Constant-Current Charge Mode Charge Current=IBAT =Strong Pull-Low =Hi-Impedance Constant-Voltage Charge Mode Charge Voltage > 4.05V =Strong Pull-Low =Hi-Impedance Standby Mode Charge Termination =Hi-Impedance =Strong Pull-Low VBAT < 4.05V VBAT 2.9V Charge Current <1/10．IBAT STDBY CHRG CHRG STDBY CHRG STDBY CHRG STDBY CHRG STDBY VBAT < 2.9V or Vcc < VBAT Vcc < VUVLO or Vcc < VBAT Vcc < VUVLO or Check VBAT Vcc ≥ VBAT Vcc ≥ VUVLO +0.1V and VBAT 2.9V or Vcc < VBAT Vcc < VUVLO Vcc < VBAT Vcc < VUVLO or VBAT > 4.05V
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Pin Descriptions SOP-8L (EP) VBAT LX GND VS TOP View VCC EN FP8202 EP Bottom View CHRG STDBY XXx-XXL DFN-10L (EP) Name No. I / O Description LX 1 I Switch node and inductor connection pin GND 2 P IC Ground VS 3 I Charge current-sense input VBAT 4 P Battery Voltage EN 5 I Enable Control STDBY
6 O Charge State Indicator2
7 O Charge State Indicator1
EP 9 P Exposed PAD-Must connect to Ground Name No. I / O Description LX 1 I Switch node and inductor connection pin GND 2 P IC Ground VS 3 I Charge current-sense input VBAT 4 P Battery Voltage TEMP 5 I Battery Temperature Detector RTRICK 6 I CC Charge Current Setting & Monitor EN 7 I Enable Control STDBY
8 O Charge State Indicator2
9 O Charge State Indicator1
EP 11 P Exposed PAD-Must connect to Ground EP Top View Bottom View EP TEMP LX GND VS VBAT VCC EN RTRICK STDBY CHRG FP8202 XXxXXL
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Marking Information SOP-8L (EP) Halogen Free Lot Number Internal ID Per - Half Month Year FP8202 XXx-XXL DFN-10L (EP) Halogen Free Lot Number Internal ID Per-Half Month Year FP8202 XXxXXL Halogen Free: Halogen free product indicator Lot Number: Wafer lot number’s last two digits For Example Lot : 123456 XXx-56L Internal ID: Internal Identification Code Per-Half Month: Production period indicator in half month time unit For Example : A → First Half Month of January B → Second Half Month of January C → First Half Month of February D → Second Half Month of February Year: Production year’s last digit
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product.
Ordering Information
Part Number Operating Temperature Package MOQ Description FP8202XR-G1 -40°C ~ +85°C SOP-8L(EP) 2500EA Tape & Reel FP8202dR-G1 -40°C ~ +85°C DFN-10(EP) 2500EA Tape & Reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage Vcc -0.3 6 V LX to VCC Voltage VDS -7 V All Other Pins -0.3 6 V BAT pin Current IBAT 2.5 A Junction Temperature TJ +150 °C Storage Temperature TS -65 +150 ℃ Thermal Resistance (Junction to Ambient) θJA DFN-10L 65 ℃ / W SOP-8L 50 ℃ / W Thermal Resistance (Junction to Case) θJC DFN-10L 10 ℃ / W SOP-8L 10 ℃ / W Operating Temperature -40 +85 ℃ Lead Temperature (soldering, 10 sec) +260 ℃ Suggested IR Re-flow Soldering Curve
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Recommended Operating Conditions Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage Vcc 4.35 5.5 V Operating Temperature Ambient Temperature -40 85 °C Parameter Symbol Test Conditions Min. Typ. Max. Unit Standby Current ISB Charge Termination 55 100 µA Shutdown Supply Current IST VCC < VBAT , VCC< VUVLO RPROG not connect 55 100 µA CV Output (Float) Voltage VFLOAT 0℃<TA<85℃ 4.158 4.200 4.242 V BAT pin Current IBAT RSense=0.05Ω 1800 2000 2200 mA RSense =0.1Ω 900 1000 1100 mA RSense =0.2Ω 450 500 550 mA Standby-Mode, VBAT=4.2V 0 -2.5 -6 µA Shutdown-Mode, ±4 ±6 µA Sleep-Mode, VCC=0V -4 -6 µA Trickle Charge Current ITRIKL VBAT< VTRIKL , RSense=0.05Ω 200 mA Trickle Charge Threshold Voltage VTRIKL RSense =0.1Ω, VBAT Rising 2.8 2.9 3.0 V Trickle Charge Hysteresis Voltage VTRKHYS RSense =0.1Ω 200 mV VCC Under Voltage Lockout Threshold VUV Vcc Rising 3.5 3.7 3.9 V VCC Under Voltage Lockout Threshold Hysteresis VUVHYS 500 mV VCC-VBAT Lockout Threshold VASD Vcc Rising 250 mV Vcc Falling 100 mV PMOSFET On Resistance RON 260 mΩ C/10 Termination Current Threshold ITERM RSense =0.1Ω 100 mA RSense=0.05Ω 200 mA Switching Frequency Fsw 500 600 700 KHz Max. Duty DMAX 100 % Min. Duty DMIN 0 % CHRGB pin Output Low Voltage VCHRG ICHRG=5mA 0.3 0.6 V STDBYB pin Output Low Voltage VSTDBY ISTDBY=5mA 0.3 0.6 V Battery Recharge Threshold Voltage VRECHRG VFLOAT-VRECHRG 150 mV Thermal Shutdown TLIM 145 °C TEMP pin High Threshold Voltage VTEMP-H 80 % TEMP pin Low Threshold Voltage VTEMP-L 45 % Soft-Start Time TSS IBAT=0 to IBAT=0.1V/RS 20 µs Recharge Comparator Filter Time TRECHRG VBAT High to Low 0.8 1.8 4 mS C/10Termination Comparator Filter Time TTERM IBAT Falling below ITERM 0.8 1.8 4 mS
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Function Description Operation The FP8202 is a switch-mode battery charger designed primarily for charging single cell lithium-ion batteries. The charger uses a constant-current/constant-voltage charge algorithm with programmable current. Charging current can be programmed externally with a single current sensing resistor between the VS pin and the BAT pin. The final battery float voltage is internally set to 4.2V. Normal Charge Cycle A charge cycle begins when the voltage at the V CC pin rises above the UVLO threshold. If the BAT pin voltage is smaller than 2.9V, the charger enter trickle charge mode. In this mode, the FP8 202 supplies approximately 1/10 the programmed charging current to bring the battery voltage up to a safe level for full current charging. When the BAT pin voltage rises above 2.9V, the charger enters constant-current mode, where the full programmed charge current is supplied to the battery. When the BAT pin voltage approaches 4V, the FP8202 enters the constant-voltage mode and the charge current begins to decrease. When the charge current drops to 1/10 of the programmed value, the charge cycle ends. Programming Charge Current When the battery voltage exceeds the trickle charge threshold, the charger goes into the full scale constant current charge mode. In constant current mode, the charge current is set by the external sense resistor R SENSE and an inte rnal 100mV reference , The required resistor value can be calculated from the charge current with following equation: Rsense= CHGI mV100 Charge Termination A charge cycle is terminated when the charge current falls to 1/10 the programmed valu e after the final float voltage is reached. This condition is detected by using an internal filtered comparator to monitor the sense voltage. When the voltage between the VS pin and the BAT pin falls below 10mV for longer then TTERM (1.8ms), charging is te rminated. The charge current is latched of and the FP8202 enters standby mode, where the input supply current drops to 55uA. The FP8202 draws no current from the battery in standby mode. This feature reduces the charge and discharge cycles on the battery, further prolonging the battery life.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Thermal Protection FP8202 will shutdown automatically when the internal junction temperature reaches 140℃ to protect both the part and the system. Battery Temperature Fault Monitoring In the event of a b attery over -temperature condition, the charg ing control will turn off the internal pass device and report a battery temperature fault on the TEMP pin. Inside the FP8202, two internal voltage references VTEMP-H and VTEMP-L are fixed at 80% ×VCC and 45% ×VCC respectively. As the TEMP pin voltage rises above VTEMP-H or falls below V TEMP-L, the FP8 202 stops charging and indicates a fault condition. After the system recovers from a temperature fault, the device will resume charging operation. For applications th at do not need to monitor the battery temperature, short the TEMP pin to the GND. The values of R1 and R2 are set according to the battery temperature range and the value of thermal sensitive resistor. If th e battery is equipped with NTC (Negative T emperature Coefficient) thermistor and the temperature monitor range is T L~TH(TL< T H), then RT, the thermistor resistance, decreases as temperature increases from TL to TH, means RTL>RTH. The TEMP pin voltage can be calculated as: VccR//2R1R R//2RV T T TEMP Thus, this VTEMP decreases as the temperature increase from TL to TH. To set proper R1 and R2 value for temperature protection, we set: 0.8×Vcc= VTEMPH= VccR//2R1R R//2R TL TL at TL 0.45×Vcc= VTEMPL= VccR//2R1R R//2R TH TH at TH Where RTL and RTH are the thermistor resistances at TL and TH respectively. So R1 and R2 can be derived as following:
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. R1= 2 1THTL
12 TH TL
KK )R-R( )K-K(RR = 36 )R-R( 35RR THTL TH TL R2= )K K-K(R-)K K-K(R )K-K(RR 212TH211TL
12 TH TL =
where K1=0.45 and K2=0.8 VIN BAT TEMP GND Li-ion Battery Bat+ Bat- NTCFP8202 Vcc Under Voltage Lockout (UVLO) An internal under voltage lockout circuit monitors the input voltage and keeps the charger in shutdown mode until Vcc rises above the under voltage lockout threshold. The UVLO circuit has a built-in hysteresis of 500mV. Furthermore, to protect against reverse current in the power MOSFET, the UVLO circuit keeps the charge in shutdown mode if Vcc falls to within 100mV of the battery voltage, If the UVLO comparator is tripped, the charger will not come out of shutdown mode until Vcc rises 250mV above the battery voltage.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Manual shutdown At any point in the charge cycle, the FP8202 can be put into shutdown mode when put the EN pin to the low-level voltage. This reduces the battery drain current to about to 2uA and the supply current to less than 55uA. Automatic Recharge Once the charge cycle is terminated, the FP8202 continuously monitors the voltage on the BAT pin using a comparator with a 1.8ms filter time (T RECHARGE). A charge cycle restarts when the battery voltage falls belo w 4.05V (which corresponds to approximately 80% to 90% battery capacity).This ensures that the battery is kept at or near a fully charged condition and eliminated the need for periodic charge cycle initiations. CHRG output enters a strong pull-down state during recharge cycles. Programming Trickle Charge Current If the battery voltage is below the trickle charge threshold, the FP8202 delivers a small current to charge the battery until the battery voltage reaches the fast charge threshol d value. the trickle charge current is set by the external resistor R TRICK. For applications that do not need to set the trickle charge current , short the RTRICK pin to the GND. The FP8 202 supplies approximately 1/10 the programmed charging current to bring the battery voltage up to a safe level. The trickle charge current value can be calculated with following equation: ITRICK = Rtrick+k400 Rtrick+k40 x ICHG Vref VTRICK 360k 40k RTRICK RTRICK
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product.
Application Information
Inductance value is decided based on different con dition. 3.3uH to 4.7 µH inductance value is recommended for general application circuit. There are three important inductor specifications, DC resistance, saturation current and core loss. Low DC resistance has better power efficiency. Capacitor Selection Use Low ESR capacitors are preferred to reduce the input inrush voltage, Ceramic capacitor of X5R and X7R are recommended, which have low equivalent series resistance (ESR) and wider operation temperature range. Diode Selection Schottky diodes with fast recovery times and low forward voltages are recommended. Ensure the diode average and peak current rating exceed the average output current and peak inductor current. In addition, the diode’s reverse breakdown voltage must exceed the Vcc voltage. Layout Considerations 1. The power traces, consisting of the GND trace, the LX trace and the battery trace should be kept short,direct and wide. 2. Layout switching node LX, inductor and diode connection traces wide and short to reduce EMI. 3. Place CIN nearby VCC pin as closely as possible to maintain input voltage steady and filter out the pulsing input current. 4. The GND of the CIN and Schottky should be connected close together and directly to a ground plane. 5. Place RSENSE nearby BAT pin and VS pin.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. FP8202 RSC3 BAT GND VIA to Vcc Vcc SOP-8L (EP) Suggested Layout FP8202 RSC3 BAT GND VIA to Vcc Vcc 5 6 DFN-10L (EP) Suggested Layout
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Typical Application FP8202 LXVCC CHRG VBAT GND VS VIN LI-Ion BAT+ EN STDBY 10k R3R2 1k1k C3 4.7uF 10uF/X5R 10uF SM340A 4.7uH RS 0.05 SOP-8L (EP) FP8202 LXVCC EN CHRG STDBY VBAT RTRICK GND VS TEMP NTC VIN LI-Ion BAT+ 10k RS 0.05 4.7uF 10uF 10uF/X5R SM340A RTS1 4.7uH RTS2 DFN-10L (EP)
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. Package Outline SOP-8L (EP) UNIT: mm Exposed PAD Dimensions: Note: 1. Package dimensions are in compliance with JEDEC outline: MS-012 AA. 2. Dimension ”D” does not include molding flash, protrusions or gate burrs. 3. Dimension “E” does not include inter-lead flash or protrusions. Symbols Min. (mm) Max. (mm) A 1.346 1.752 A1 0.050 0.152 A2 1.498 D 4.800 4.978 E 3.810 3.987 H 5.791 6.197 L 0.406 1.270 θ° 0° 8° Symbols Min. (mm) Max. (mm) E1 1.94 2.29 D1 1.94 2.29
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights un der any patent accompany the sales of the product. DFN-10L (EP) m Unit: mm Note: 1. JEDEC Outline :N/A 2. Dimensions “D” does not include mold flash, protrusions or gate burrs mold flash 3. Protrusions and gate burrs shall not exceed .15mm (.006in) per side. Dimensions “E” does not include inter-lead flash or protrusions inter-lead flash and protrusions 4. Shall not exceed 25mm (.010in) per side. Symbols Min. (mm) Max. (mm) A 0.700 0.800 A1 0.000 0.050 A3 0.20REF b 0.180 0.300 D 3.00 E 3.00 D2 2.200 2.700 E2 1.400 1.750 e 0.500 L 0.300 0.500 K 0.200