BQ24745 BQ745 IC

Description

Key Features

• Supports 2, 3, or 4 series battery cells

• SMBus interface for programming charge voltage, charge current, and adapter current limit

• NMOS–NMOS synchronous buck converter, fixed switching at ~300 kHz

• High efficiency (typically > 95 %)

• Input voltage (adapter) operating range: 7 V to 24 V

• Absolute maximum input voltage: 30 V

• Charge voltage adjustable from 1.024 V up to 19.2 V

• Maximum charge current: 10 A

• Charge voltage accuracy: ±0.5 %

• Charge current accuracy: ±3 %

• Adapter current (input current) accuracy: ±3 %

• Input current sense amplifier accuracy: ±2 %

• Integrated input current comparator with adjustable threshold and hysteresis

• Dynamic Power Management (DPM) to reduce charge current when input power limit is reached

• Internal soft-start to limit inrush current at startup

• Charge enable pin for external control

• Low quiescent currents:

  • < 10 µA discharge of battery when adapter is removed

  • < 1 mA current drawn from DC input when charging is disabled

• Status and monitoring outputs:

  • Adapter presence indicator (adjustable threshold)

  • Input current comparator output

  • Current sense amplifier output

• Supports power path / system load sharing between adapter and battery

• 28‑pin VQFN package (5 × 5 mm)

• Operating temperature range: 0 °C to 125 °C

Please Note:

• No Returns, Exchanges, or Warranty available.

• Kindly verify the model number and ensure it matches your product before placing an order.

• We guarantee premium quality.

• All items are thoroughly inspected prior to shipping.