NB7140 Series
1-cell Li-ion Battery Protection IC with Forced Standby and Built-In System Reset Function
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Description
The NB7140 is a 1-cell Li-ion / polymer battery protection IC which provides over-charge, overdischarge, charge / discharge overcurrent and short circuit protection, with built-in system reset function. The NB7140 can shift to the Forced Standby Mode by an external signal to STB pin to reduce own current consumption. Low voltage and high accuracy overcurrent detection achieves a heat reduction on board by using low sense resistor. Low operating current and standby current can prolong the battery life even when its capacity is small, and the forced standby mode with STB pin too can prolong the small battery life. System reset is possible by turning off the charge FET / discharge FET during MCU runaway with the RST pin.
Spec
| Operating Input Voltage | 1.5 V to 5.0 V (Maximum Rating: 12 V) | ||
| Number of Cells | 1 | ||
| Supply Current | Typ. 1.5 µA | ||
| Standby Current | Max. 0.04 µA (VDET2 Latch type), Max. 0.2 µA (VDET2 Auto release type) | ||
| Overcharge Detection Voltage | 4.2 V to 4.7 V (0.005 V Step) | ||
| Overcharge Detection Voltage Accuracy | ±15 mV | ||
| Overcharge Detection Delay Time | 1024 ms | ||
| Overdischarge Detection Voltage | 2.1 V to 3.2 V (0.005 V Step) | ||
| Overdischarge Detection Voltage Accuracy | ±35 mV | ||
| Overdischarge Detection Delay Time | 32 ms, 64 ms, 128 ms | ||
| Discharge Overcurrent Detection Voltage | VDET3-1: 0.005 V to 0.050 V (0.0005 V Step) VDET3-2: 0.011 V to 0.100 V (0.0005 V Step) |
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| Discharge Overcurrent Detection Voltage Accuracy | VDET3-1: ±1.0 mV (VDET3-1 ≤ 0.0300 V), ±1.5 mV (VDET3-1 ≥ 0.0305 V) VDET3-2: ±2.0 mV (VDET3-2 ≤ 0.0600 V), ±4.0% (VDET3-2 ≥ 0.0605 V) |
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| Discharge Overcurrent Detection Delay Time | VDET3-1-typeA: 1024 ms, 2048 ms, 3072 ms, 4096 ms, VDET3-1-typeB: 12.5 ms, 16.5 ms, 1024 ms, 4096 ms VDET3-2: 7.5 ms, 12.5 ms, 16.5 ms |
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| Charge Overcurrent Detection Voltage | -0.050 V to -0.005 V (0.0005 V Step) | ||
| Charge Overcurrent Detection Voltage Accuracy | ±1.5 mV (VDET4 ≤ -0.0305 V), ±1.0 mV (VDET4 ≥ -0.0300 V) | ||
| Charge Overcurrent Detection Delay Time | 10 ms, 17 ms | ||
| Short Detection Voltage | 0.030 V to 0.200 V (0.001 V Step) | ||
| Short Detection Voltage Accuracy | ±4.0 mV (VSHORT1 ≤ 0.120 V), ±5.0 mV (VDET4 ≥ 0.121 V) | ||
| Short Detection Delay Time | 280 µs | ||
| Conditions for Overcharge Restoration | Selectable: Auto Release / Latch | ||
| Conditions for Overdischarge Restoration | Selectable: Auto Release / Latch | ||
| Package | WLCSP-8-P10 | ||
| 0 V Battery Charging | Selectable: Permission / Inhibition | ||
Protections / Functions
| Temperature Protection | Reset | Alarm | Cell Balance | Cascadable | Open Wire Detection | Wakeup | Short-circuit Current Detection | Delay Time Shortening |
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Functional Description
| Temperature Protection | Temperature Protection |
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| Reset | Reset Function |
| Alarm | Alarm Function |
| Cell Balance | Cell Balance Function |
| Cascadable | Cascade Connect Function |
| Open Wire Detection | Open Wire Detect Function |
| Wakeup | Wakeup Function |
| Short-circuit Current Detection | Short-circuit Current Protection |
| Delay Time Shorting | Output Delay Time Short Function |
For more details, please refer to "Protecting Li-ion Batteries: Functions and Advantages".
Technical Documents
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Typical Application
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
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| NB7140ZAxxxxxE2S |
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WLCSP-8-P10 | See datasheet | NB7140ZAS |
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
FAQ
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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