BQ7790509PWR
Power Management
Technical Specifications
| Type | Description |
|---|---|
| 0V Battery Charge | - |
| Type of Battery | Lithium Battery |
| The Chip Type | Protection IC |
| Balance Current | - |
| Charge Current - Max | - |
| Operating Temperature | -40°C~+85°C |
| Type | Description |
|---|---|
| Interface | - |
| Quiescent Current | 6 µA |
| Supply Voltage | 3V~25V |
| Features | Overcharge protection;Over-discharge protection;Overcurrent Protection;Short-Circuit Protection;Battery temperature monitoring |
| Package / Case | TSSOP-20 |
Product Introduction
The BQ77904 and BQ77905 devices are low-power battery pack protectors that can implement a series of voltage, current, and temperature protections without microcontroller (MCU) control. The stackable interface of these devices allows for easy expansion, supporting battery applications from 3 cells in series to 20 cells or more in series. The protection thresholds and delays are factory-programmed, and multiple configurations are available for selection. To enhance flexibility, separate over-temperature and under-temperature discharge thresholds (OTD and UTD) as well as over-temperature and under-temperature charge thresholds (OTC and UTC) are also provided.
Features
- Normal mode: 6µA (bQ77904 and bQ77905)
- Complete voltage, current, and temperature protection
- Scalable cell count, supporting 3S to 20S or more
- Voltage protection (±10mV accuracy)
- Overvoltage: 3V to 4.575V
- Undervoltage: 1.2V to 3V
- Open-wire cell and broken wire detection (OW)
- Current protection
- Overcurrent discharge 1: -10mV to -85mV
- Overcurrent discharge 2: -20mV to +170mV
- Short-circuit discharge: -40mV to +340mV
- Accuracy of ±20% for voltage ≤20mV and ±30% for voltage >20mV across the full temperature range
- Temperature protection
- Overtemperature charge: 45°C to 50°C
- Overtemperature discharge: 65°C to 70°C
- Undertemperature charge: -5°C to 0°C
- Low-temperature discharge: -20°C or -10°C
- Additional features
- Separate CHG and DSG FET drivers
- 36V absolute maximum rating per cell input
- Built-in self-test for high reliability
- Shutdown mode: 0.5µA (maximum)
Applications
- Power tools, garden tools
- Start-stop battery packs
- Lead-acid (PbA) backup batteries
- Light electric vehicles
- Energy storage systems, uninterruptible power supplies (UPS)
- 10.8V to 72V battery packs
Datasheet
Alternative Parts
Common BQ7790509PWR alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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