HT7Q2552
HT7Q2552 is 3 to 8 Cell Analog Front End manufactured by Holtek Semiconductor.
Features
- VIN input ranges from 7.5V to 36V
- Individual cell voltage monitor outputs 1/2 of battery cell voltage, when the analog output is 2.1V, it has an accuracy of ±7.5m V
- Internal cell balance switches
- Integrated voltage regulator with 5V/50m A and ±1% accuracy
- At Ta=-40o C~85o C, 2.5V reference voltage output with a maximum variation of 15m V in temperature drift
- Two Discharge N-type MOSFET gate drivers
- Single Charge N-type MOSFET gate driver
- Charge/Discharge differential current monitor:
- IMON pin outputs amplified ISP-ISN differential voltage
- Voltage amplifying rate selection: 10/50
- Discharge short-current detection:
- Detection threshold voltage selection: 50m V/100m V/150m V/200m V/250m V/300m V/350m V/400m V
- Detection debounce time selection: 0μs~992μs, 32 sections, 32μs per section
- Integrated Over-temperature protection selection: 85℃/100℃/125℃/150℃
- Sleep mode with 0.1μA ultra-low standby current
- Two High-voltage wake-up functions
- I2C bus munication with host MCU
- Operating temperature range: -40o C to +85o C
- Package type: 32-pin QFN
Applications
- Handheld vacuum cleaners
- Electric power tools
General Description
The HT7Q2552 is a high voltage analog-front-end IC for 3 to 8 cell Li-ion rechargeable battery protection. It consists of a 5V high accuracy regulator, an accuracy 2.5V reference voltage output, an individual cell voltage monitor, two discharge paths, i.e., low-side power switch gate drivers, a charge path, i.e., high-side power switch gate driver, a charge/discharge differential current monitor, and a discharge short-current protection. The cell voltage monitor is designed to monitor each battery cell voltage individually and outputs the divide-by-2 voltage to the analog multiplexer with ±7.5m V accuracy. The current monitor channel provides charge and discharge current monitoring and short-current protection. The device can directly drive external N-type MOSFETs to control charge and discharge by charge and discharge gate...
