Products
DW02A
Under normal conditions, the VDD terminal voltage of DW02A/DW02B is between the overvoltage charge protection threshold (VOC) and the overvoltage discharge protection threshold (VOD), and the VM detection terminal voltage is between the charger detection voltage (VCHG) and the overcurrent discharge protection threshold (VEDI). At this point DW02A/DW02B makes the internal N-MOS tube on. At this time, you can use the charger to charge the battery, but also through the load to make the battery
DW02A/DW02B Description:
DW02A/DW02B series circuit is a high-precision single-section built-in MOSFET rechargeable lithium battery protection circuit, it integrates high-precision overvoltage charge protection, overvoltage discharge protection, overcurrent discharge protection and other performance in one.
Under normal conditions, the VDD terminal voltage of DW02A/DW02B is between the overvoltage charge protection threshold (VOC) and the overvoltage discharge protection threshold (VOD), and the VM detection terminal voltage is between the charger detection voltage (VCHG) and the overcurrent discharge protection threshold (VEDI). At this point DW02A/DW02B makes the internal N-MOS tube on. At this time, you can either use the charger to charge the battery or discharge the battery through the load.
The DW02A/DW02B provides overcharge/discharge protection by detecting the VDD or VM terminal voltage (relative to the GND terminal). When the charge/discharge protection strip occurs, the internal N-MOS changes from on-off to off, thus stopping the charge/discharge process.
DW02A/DW02B has a corresponding recovery condition for each protection state. When the recovery condition is met, the built-in N-MOS changes from off to on, thus entering the normal state.
DW02A/DW02B sets a certain delay time for each protection/recovery condition, and only after the protection/recovery condition lasts for the corresponding time, the corresponding protection/recovery is performed. If the protection/recovery condition is removed before the corresponding delay time, the protection/recovery state is not entered.
The DW02A/DW02B operates with very low power consumption and a very small SOT23-5 package, making the chip ideal for rechargeable battery pack applications with small space constraints. This product is not suitable for products with poor layout and shielding of wireless and RF signals. Please make sure to verify the finished product before using this product.
Built-in low on-internal resistance N-MOSFET
High precision overcharge protection voltage detection 4.275V±25mV
High precision overdischarge protection voltage detection 2.425V±75mV
High precision over current discharge protection detection
Battery short circuit protection
There is 0V charging
With over charge, over discharge automatic recovery function
Internal RC, built-in MOSFET (no peripheral devices required)
Ultra-miniaturized SOT23-5 package
DW02A/DW02B Product Application:
High precision protector for telephone battery or other lithium battery
Model number | Encapsulation form | Pin number | Functional distinction |
DW02A | SOT23-5 | 5 | Overtemperature protection can be self-restored without removing the load |
DW02B | SOT23-5 | 5 | Overtemperature protection can be self-restored without removing the load |
DW02A/DW02B pin diagram and description:
| 序号 |
| I/O | Instructions |
1 | NC |
| Bare foot | |
2 | GND | POW | The power grounding terminal is connected to the negative terminal of the power supply (battery). | |
3 | VDD | POW | The power input terminal is connected to the positive terminal of the power supply (battery). | |
4,5 | VM | I | Charge/discharge current detection input |
DW02A/DW02B Functional block diagram:
DW02A/DW02B Typical application schematic diagram:
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