BQ25170J

Name: BQ25170J
Brand: TI
SKU: BQ25170J
Price: 0.26 USD

활성

800mA JEITA 호환 선형 배터리 충전기 - 1셀 리튬 이온 및 LiFePO4용

지금 주문

데이터시트

document-pdfAcrobat BQ25170J: 800-mA JEITA-Compliant Linear Battery Charger datasheet (영어)

BQ25170J

활성

데이터시트

지금 주문

제품 상세 정보

Number of series cells

1

Charge current (max) (A)

0.8

Vin (max) (V)

6.5

Cell chemistry

Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4

Battery charge voltage (min) (V)

3.5

Battery charge voltage (max) (V)

4.4

Absolute max Vin (max) (V)

30

Control topology

Linear

Control interface

Standalone (RC-Settable)

Features

BAT temp thermistor monitoring (JEITA profile), IC thermal regulation

Vin (min) (V)

3

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Number of series cells

1

Charge current (max) (A)

0.8

Vin (max) (V)

6.5

Cell chemistry

Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4

Battery charge voltage (min) (V)

3.5

Battery charge voltage (max) (V)

4.4

Absolute max Vin (max) (V)

30

Control topology

Linear

Control interface

Standalone (RC-Settable)

Features

BAT temp thermistor monitoring (JEITA profile), IC thermal regulation

Vin (min) (V)

3

Rating

Catalog

Operating temperature range (°C)

-40 to 125

WSON (DSG)

8

4 mm² 2 x 2

Input voltage up-to 30-V tolerant
Automatic Sleep Mode for low power consumption
- 350-nA battery leakage current
- 80-µA input leakage current when charge disabled
Supports 1-cell Li-Ion, Li-Polymer, and LiFePO₄
External resistor programmable operation
- VSET to set battery regulation voltage:
  - Li-Ion: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
  - LiFePO₄: 3.5 V, 3.6 V, 3.7 V
- ISET to set charge current from 10 mA to 800 mA
High accuracy
- ±0.5% charge voltage accuracy
- ±10% charge current accuracy
Charging features
- Precharge current 20% of ISET
- TS pin for charging operation control over JEITA range
- Termination current 10% of ISET
- NTC thermistor input to monitor battery temperature
- pin for charging function control
- Open-drain output for status and fault indication
- Open-drain output for power good indication
Integrated fault protection
- 6.6-V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000-mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection

Input voltage up-to 30-V tolerant
Automatic Sleep Mode for low power consumption
- 350-nA battery leakage current
- 80-µA input leakage current when charge disabled
Supports 1-cell Li-Ion, Li-Polymer, and LiFePO₄
External resistor programmable operation
- VSET to set battery regulation voltage:
  - Li-Ion: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
  - LiFePO₄: 3.5 V, 3.6 V, 3.7 V
- ISET to set charge current from 10 mA to 800 mA
High accuracy
- ±0.5% charge voltage accuracy
- ±10% charge current accuracy
Charging features
- Precharge current 20% of ISET
- TS pin for charging operation control over JEITA range
- Termination current 10% of ISET
- NTC thermistor input to monitor battery temperature
- pin for charging function control
- Open-drain output for status and fault indication
- Open-drain output for power good indication
Integrated fault protection
- 6.6-V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000-mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection

The BQ25170J is an integrated 800-mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO₄ batteries targeted at space-limited portable applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device has three phases for charging a Li-Ion battery: precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity.

In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, T_REG, is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.

The BQ25170J is an integrated 800-mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO₄ batteries targeted at space-limited portable applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device has three phases for charging a Li-Ion battery: precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity.

In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, T_REG, is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.

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