Overview
The BQ29723DSER, produced by Texas Instruments, is a member of the BQ2970 family of Li-Ion/Li-Polymer advanced single-cell battery protector ICs. This device is designed to provide comprehensive protection and monitoring functions for lithium-ion and lithium-polymer battery cells. It features accurate monitoring and trigger thresholds for overcurrent protection during high discharge or charge current operations, as well as overcharge and depleted battery monitoring. The BQ29723DSER operates with low current consumption, making it suitable for various portable electronic devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (Pack+) | VSS - 0.3 | 12 | V | |
| Operating Temperature Range | -40 | 85 | °C | |
| Current Consumption in NORMAL Mode | 4 | 5.5 | µA | |
| Current Consumption in Power Down Mode | 0.1 | µA | ||
| Package Type | 6-Pin DSE (1.50 mm × 1.50 mm × 0.75 mm) | |||
| OVP (Overvoltage Protection) | 4.425 | V | ||
| OVP Delay | 1.25 | sec | ||
| UVP (Undervoltage Protection) | 2.300 | V | ||
| UVP Delay | 20 | ms | ||
| OCC (Overcharge Current Detection) | -0.100 | V | ||
| OCC Delay | 8 | ms | ||
| OCD (Over-Discharge Current Detection) | 0.160 | V | ||
| OCD Delay | 8 | ms |
Key Features
- Input Voltage Range: VSS - 0.3V to 12V for Pack+ input.
- FET Drive Outputs: CHG and DSG FET drive outputs for charge and discharge control.
- Voltage Sensing: Voltage sensing across external FETs for overcurrent protection with accuracy within ±5 mV (typical).
- Fault Detection: Includes overcharge detection (OVP), over-discharge detection (UVP), charge overcurrent detection (OCC), discharge overcurrent detection (OCD), and load short-circuit detection (SCP).
- Zero Voltage Charging: Supports zero voltage charging for depleted batteries.
- Factory Programmed Thresholds: Factory programmed fault protection thresholds, fault trigger timers, and fault recovery timers.
- Low Power Modes: NORMAL mode with 4 µA current consumption and shutdown mode with 100 nA current consumption.
Applications
- Mobile Handsets: Ideal for protecting battery cells in mobile phones.
- Handheld Data Terminals: Suitable for handheld data terminals and other portable devices.
- Tablet PCs: Used in tablet PCs to ensure safe and reliable battery operation.
Q & A
- What is the primary function of the BQ29723DSER?
The primary function of the BQ29723DSER is to provide protection and monitoring for Li-Ion/Li-Polymer battery cells, including overcurrent, overcharge, and over-discharge protection.
- What is the input voltage range for the BQ29723DSER?
The input voltage range for the BQ29723DSER is from VSS - 0.3V to 12V for the Pack+ input.
- What types of fault detection does the BQ29723DSER support?
The BQ29723DSER supports overcharge detection (OVP), over-discharge detection (UVP), charge overcurrent detection (OCC), discharge overcurrent detection (OCD), and load short-circuit detection (SCP).
- What is the typical current consumption in NORMAL mode?
The typical current consumption in NORMAL mode is 5.5 µA.
- What is the operating temperature range of the BQ29723DSER?
The operating temperature range is from -40°C to +85°C.
- What package type is the BQ29723DSER available in?
The BQ29723DSER is available in a 6-Pin DSE package (1.50 mm × 1.50 mm × 0.75 mm).
- Does the BQ29723DSER support zero voltage charging?
Yes, the BQ29723DSER supports zero voltage charging for depleted batteries.
- What are some common applications for the BQ29723DSER?
Common applications include mobile handsets, handheld data terminals, and tablet PCs.
- How accurate is the voltage sensing across external FETs?
The voltage sensing across external FETs is accurate within ±5 mV (typical).
- What are the factory-programmed fault protection thresholds?
The device has factory-programmed fault protection thresholds, fault trigger timers, and fault recovery timers.
