Ti Bq24157 Battery Power Charge Management Chip Voltage Monitor Protector Electronic Components Integrated Circuit IC.

• shape: Flat
• Conductive Type: Bipolar Integrated Circuit
• Integration: MSI
• Technics: Semiconductor IC
• Application: Standard Generalized Integrated Circuit
• Type: Digital / Analog IC
• Model NO.: BQ24157
• Rating: Catalog
• RoHS: Yes
• Reach: Yes
• Lead Finish / Ball Material: Nipdau / Snagcu
• Delivery Time: 1-3 Days
• Transport Package: Small Large T&R
• Specification: 9 mm² 3 x 3
• Trademark: TI
• HS Code: 8542399000
• Production Capacity: 60000

Product Description

Packaging information

Package | PinsDSBGA (YFF) | 20

Operating temperature range (°C)-40 to 125

Package qty | Carrier3,000 | LARGE T&R

Features for the BQ24157

• Power Up System without Battery
• Charge Faster than Linear Chargers
• High-Accuracy Voltage and Current Regulation
  • Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)
  • Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C to 125°C)
  • Charge Current Regulation Accuracy: ±5%
• Input Voltage Based Dynamic Power Management (VIN DPM)
• Bad Adaptor Detection and Rejection
• Safety Limit Register for Maximum Charge Voltage and Current Limiting
• High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
• 20-V Absolute Maximum Input Voltage Rating
• 6.5-V Maximum Operating Input Voltage
• Built-In Input Current Sensing and Limiting
• Integrated Power FETs for Up To 1.55-A Charge Rate
• Programmable Charge Parameters through I²C™ Compatible Interface (up to 3.4 Mbps):
  • Input Current Limit
  • VIN DPM Threshold
  • Fast-Charge/Termination Current
  • Charge Regulation Voltage (3.5 V to 4.44 V)
  • Low Charge Current Mode Enable/Disable
  • Termination Enable/Disable
• Support up to 1.55A Charge Current using 55 mΩ Sensing Resistor
• Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle
• Automatic High Impedance Mode for Low Power Consumption
• Robust Protection
  • Reverse Leakage Protection Prevents Battery Drainage
  • Thermal Regulation and Protection
  • Input/Output Overvoltage Protection
• Status Output for Charging and Faults
• USB Friendly Boot-Up Sequence
• Automatic Charging
• Boost Mode Operation for USB OTG
  • Input Voltage Range (from Battery): 3.2 V to 4.5 V
• 2.1 mm x 2 mm 20-Pin WCSP Package

Description for the BQ24157

The bq24157 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I²C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.

The IC charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on battery voltage and user-selectable minimum current level. A safety timer with reset control provides a safety backup for I²C interface. During normal operation, The IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I²C interface. During the charging process, the IC monitors its junction temperature (T_J) and reduces the charge current once T_J increases to about 125°C. To support USB OTG device, bq24157 can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin WCSP package.