A4051

A4051 AITSEMI | Alldatasheet

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AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 1 - DESCRIPTION FEATURES The A4051 is a complete constant current & constant voltage linea r charger for single cell lithium -ion batteries. Its PSOP8 package and low external component count make the A4051 ideally suited for portable applications. Furthermore, the A4051 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die tem perature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The A4051 automatically terminates the charge cycle when the charge current d rops to 1/10 th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the A4051 automatically enters a low current state, dropping the battery drain current to less than 0.5uA. The A4051 can be put into shutdown mode, reducing the supply current to 50uA. Other features include Battery temperature monitor, under-voltage lockout, automatic recharge and two status pins to indicate charge and charge termination. The A4051 is available in PSOP8 package

ORDERING INFORMATION

SPQ: 4,000pcs/Reel MP8 A4051MP8R A4051MP8VR PSOP8 SPQ: 4,000pcs/Reel MP8 A4051MP8R-A A4051MP8VR-A Note Trickle Charge Current A4051: 1/10th of the constant charge current A4051-A: 3/10th of the constant charge current V: Halogen free package R: Tape & Reel AiT provides all RoHS products ⚫ Programmable Charge Current Up to 1000mA ⚫ 1/10th of the constant charge current ⚫ No MOSFET, Sense Resistor or Blocking Diode Required ⚫ Complete Linea r Charger in PSOP8 Package for single Cell Lithium-Ion Batteries ⚫ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating ⚫ Charges Single Cell Li -Ion Batteries Directly from USB Port ⚫ Preset 4.2V Charge Voltage ⚫ Charge Current Monitor Output for Gas Gauging ⚫ Automatic Recharge ⚫ Charge state pairs of output, no battery and fault status display ⚫ C/10 Charge Termination ⚫ 50uA Supply Current in Shutdown ⚫ 2.9V Trickle Charge Threshold ⚫ Soft-Start Limits Inrush Current ⚫ Battery temperature monitoring function ⚫ Available in PSOP8 package APPLICATION ⚫ Cellular Telephones, PDAs, MP3 /MP4 Players ⚫ Charging Docks and Cradles ⚫ Bluetooth 、GPS Applications TYPICAL APPLICATION

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function

1 TEMP

Battery temperature detection input. TEMP pin to receive the battery NTC sensor output. If the TEMP pin voltage is less t han the input voltage is greater than 45% or 80% of the input voltage means the battery temperature is too low or too high, then the charge has been suspended. If the TEMP direct access GND, battery temperature detection canceled, the other charged and functioning properly.

2 PROG

Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is programmed by connecting a 1% resistor, R PROG, to ground. When charging in trickle-current mode, this pin servos to 0.1V.When charging in cons tant-current mode, this pin servos to 1V. In all modes, the voltage on this pin can be used to measure the charge current using the following formula: IBAT = (VPROG/RPROG) • 1000. The PROG pin can also be used to shut down the charger. Disconnecting the p rogram resistor from ground allows a 3uA current to pull the PROG pin high. When it reaches the 1.21V shutdown threshold voltage, the charger enters shutdown mode, charging stops and the input supply current drops to 50uA. This pin is also clamped to appro ximately 2.4V. Driving this pin to voltages beyond the clamp voltage will draw currents as high as 1.5mA. Reconnecting RPROG to ground will return the charger to normal operation.

3 GND Ground

4 VCC

Positive Input Supply Voltage. Provides power to the ch arger, VCC can range from 4.25V to 6.5V and should be bypassed with at least a 10uF capacitor. When VCC drops to within 30mV of the BAT pin voltage, the A4051 enters shutdown mode, dropping I BAT to less than 2uA.

5 BAT

Charge Current Output. Provides char ge current to the battery and regulates the final float voltage to 4.2V. An internal precision resistor divider from this pin sets the float voltage which is disconnected in shutdown mode. STDBY The completion of battery charging instr uctions side. When the battery charge is complete, STDBY pulled low by internal switches, indicating the completion of charging. In addition, STDBY pin will be in a high-impedance state. CHRG Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, CHRG pin will be in a high-impedance state. 8 CE Chip enable input. High input level would A4051 is in normal working condition; low input level so that A4051 is prohibited charging status. CE pin can be TTL or CMOS level-level driver.

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 3 - ABSOLUTE MAXIMUM RATINGS VCC, Input Supply Voltage VSS-0.3 V～VSS+8V VPROG, PROG pin Voltage VSS-0.3 V～VCC+0.3V VBAT, BAT pin Voltage VSS-0.3 V～8V VCHRG, CHAG pin Voltage VSS-0.3V～VSS+8V IBAT, BAT pin Current 1400mA IPROG, PROG pin Current 1400uA TOPA, Operating Ambient Temperature -40℃～+85℃ TSTR, Storage Temperature -65℃～+125℃ Lead Temperature (Soldering, 10s) 260℃ Stresses above 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 Electr ical Characteristics are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

Parameter Symbol Conditions Min Typ Max Unit Input Supply Voltage VCC 4.25 - 6.5 V Input Supply Current ICC Charge mode, RPROG=10k - 350 2000 uA Standby mode - 150 500 uA Shutdown mode (RPROG not connected, VCC<VBAT or VCC<VUV) - 50 100 uA Regulated Output Voltage VFLOAT TA=25°C, IBAT=40mA 4.177 - 4.263 V BAT Pin Current IBAT RPROG =2k,Current mode 450 500 550 mA RPROG =1k,Current mode 900 1000 1100 Standby mode, VBAT=4.3V 0 -2.5 -6 uA Shutdown mode - -1 -2.5 Sleep mode, VCC=0V - -0.05 -0.5 Trickle Charge Current ITRIKL VBAT<VTRIKL, RPROG=1k 90 100 110 mA Trickle Charge Threshold Voltage VTRIKL RPROG =10k, VBAT Rising 2.78 2.9 3.0 V Trickle Voltage Hysteresis Voltage VTRHYS RPROG =10k 118 135 157 mV

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 4 - Parameter Symbol Conditions Min Typ Max Unit VCC Undervoltage Lockout Threshold VUV From VCC low to high 3.6 3.8 3.93 V VCC Undervoltage Lockout Hysteresis VUVHYS 150 200 300 mV VCC-VBAT Lockout Threshold Voltage VASD VCC from low to high - 250 - mV VCC from high to low 5 100 - C/10 Termination Current PROG pin Voltage VPROG RPROG =1k, Current mode 0.93 1.0 1.07 V CHRG pin Output Low Voltage VCHRG ICHRG=2.5mA - 0.35 0.8 V STDBY pin Output Low Voltage VSTDBY ISTDBY=2.5mA - 0.35 0.8 V Recharge Battery Threshold Voltage ΔVRECG VFLOAT - VRECHRG 50 100 200 mV CE High Voltage VCE-H 1.2 - - V CE Low Voltage VCE-L - - 0.6 V TEMP pin Voltage of The High-end Flip VTEMP-H - 80 82 %VCC TEMP Pin Voltage of The Low-end Flip VTEMP-L 42 45 - %VCC Limited Temperature Patterns in The Junction Temperature TLIM - 145 - ℃

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 5 - TYPICAL CHARACTERISTICS 1. VFLOAT vs. VIN 2. VPROG vs. VIN 3. Charge Current vs. VPROG 4. IBAT vs. VCC 5. IBAT vs. VBAT 6. Itrickle vs. VCC

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 6 - 7. PROG Pin Voltage vs. Temp 8. Regulated Output (Float) Voltage vs. Temp 9. Trickle Charge Threshold vs. Temperature 10. Recharge Voltage Threshold vs. Temperature

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 7 - BLOCK DIAGRAM

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 8 -

PACKAGE INFORMATION

Dimension in PSOP8 Package (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 1.350 1.750 0.053 0.069 A1 0.050 0.150 0.002 0.006 A2 1.350 1.550 0.053 0.061 b 0.306 0.510 0.012 0.020 C 0.170 0.250 0.007 0.010 D 4.700 5.100 0.185 0.200 D1 2.170 2.400 0.085 0.094 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 E2 2.172 2.400 0.090 0.099 e 1.270 ± 0.13 0.050 ± 0.005 L 0.400 1.270 0.016 0.050 L1 1.025 ± 0.2 0.0404 ± 0.007 θ 0° 8° 0° 8°

AiT Semiconductor Inc. www.ait-ic.com A4051 BATTERY MANAGEMENT 1A LINEAR LI-ION BATTERY CHARGER REV1.5 - JUN 2010 RELEASED, MAY 2021 UPDATED - - 9 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life supp ort applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere propert y, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer product design or applic ation support. AiT warrants the performance of its products of the specifications applicable at the time of sale.