Overview
The Texas Instruments BQ76200PW is a low-power, high-side N-channel MOSFET driver designed for battery-pack protection systems. This device enables the conversion of a low-side battery protection system into a high-side protection system, ensuring continuous communication between the battery pack and the host system, regardless of the state of the protection FETs. It features high-side charge and discharge FET drivers, a pre-charge PFET driver, and an internal switch for pack-voltage sensing. The BQ76200PW is particularly useful in applications where maintaining a communication link between the battery pack and the host system is crucial, even during safety faults.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | TSSOP-16 | 16 pins |
| Operating Temperature Range | -40°C to 85°C | |
| Voltage Range | 0V to 75V | |
| Current Consumption (NORMAL mode) | 40 µA | |
| Current Consumption (SHUTDOWN mode) | < 10 µA | |
| Body Size | 5.00 × 4.40 × 1.00 mm | |
| Absolute Maximum Voltage | 100 V |
Key Features
- CHG and DSG high-side NMOS FET drivers for battery protection with fast FET turn-on and turn-off times
- Pre-charge PFET driver for current-limited pre-charge of significantly depleted cell-packs
- Independent digital enable control for charging and discharging
- Minimal external components needed
- Scalable external capacitor-based charge pump to accommodate different ranges of FETs in parallel
- High-voltage tolerant (100-V absolute maximum)
- Internal switch to enable pack-voltage sensing
- Common and separate charge and discharge path configuration support
- Designed to work directly with bq76940, bq76930, and bq76920 battery monitors
Applications
- eBikes, eScooters, and eMotorcycles
- Energy storage systems and uninterruptible power supplies (UPS)
- Portable medical systems
- Wireless base-station battery systems
- Lead acid (PbA) replacement batteries
- 12-V to 48-V battery packs
Q & A
- What is the primary function of the BQ76200PW?
The primary function of the BQ76200PW is to act as a high-side N-channel MOSFET driver for battery-pack protection systems, enabling high-side protection and maintaining continuous communication between the battery pack and the host system. - What types of FETs does the BQ76200PW support?
The BQ76200PW supports high-side NMOS FETs for charging and discharging, as well as a pre-charge PFET driver. - What is the operating temperature range of the BQ76200PW?
The operating temperature range is -40°C to 85°C. - How much current does the BQ76200PW consume in NORMAL mode?
The current consumption in NORMAL mode is 40 µA. - Can the BQ76200PW be used with other Texas Instruments devices?
Yes, it is designed to work directly with bq76940, bq76930, and bq76920 battery monitors. - What is the purpose of the internal switch for pack-voltage sensing?
The internal switch enables the host to sense the PACK+ voltage by connecting it to the PACKDIV pin through an external resistor divider. - What are the typical applications of the BQ76200PW?
Typical applications include eBikes, eScooters, eMotorcycles, energy storage systems, UPS, portable medical systems, and wireless base-station battery systems. - How does the BQ76200PW ensure safety in battery systems?
The device ensures safety by providing independent enable controls for charging and discharging FETs, and by internally pulling down the enable inputs to keep the FETs off if the AFE or microcontroller is turned off or if the PCB trace is damaged. - What is the significance of the charge pump in the BQ76200PW?
The charge pump is essential for driving the high-side FETs and can be scaled to support different ranges of FETs in parallel. - How does the BQ76200PW handle power consumption in SHUTDOWN mode?
In SHUTDOWN mode, the current consumption is less than 10 µA.
