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Description
The QFEM-7758-AF1 is a lithium-ion rechargeable battery protection IC designed for a 3-serial-cell lithium-ion battery pack. It incorporates high-accuracy voltage detection circuits and delay circuits to ensure reliable performance.
Specifications and features
(1) Internal high-accuracy voltage detection circuit
• Over charge detection voltage 4.10 ± 0.05 V to 4.35 ± 0.05 V 50 mV- step
• Over charge release voltage 3.85 ± 0.10 V to 4.35 ± 0.10 V 50 mV- step
(The over charge release voltage can be selected within the range where a difference from over charge detection voltage is 0 V to 0.3 V)
• Over discharge detection voltage 2.00 ± 0.08 V to 2.70± 0.08 V 100 mV- step
• Over discharge release voltage 2.00 ± 0.10 V to 3.70± 0.10 V 100 mV - step
(The over discharge release voltage can be selected within the range where a difference from over discharge detection voltage is 0 V to 1.0 V)
• Over current detection voltage 1 0.15 ±0.015 V to 0.5 ±0.05 V 50 mV-step
(2) High input-voltage device (absolute maximum rating: 26 V)
(3) Wide operating voltage range: 2 V to 24 V
(4) The delay time for every detection can be set via an external capacitor.
(5) Three over current detection levels (protection for short-circuiting)
(6) Internal charge/discharge prohibition circuit via the control terminal
(7) The function for charging batteries from 0 V is available.
(8) Low current consumption
• Operation 50 µA max. (+25 °C)
• Power-down 0.1 µA max. (+25 °C)Application Scenarios
The QFEM-7758-AF1 is commonly used in lithium-ion rechargeable battery packs.
Comparison
Advantages- High accuracy voltage detection for reliable battery protection
- Wide operating voltage range
- Adjustable delay time for detection
- Three over current detection levels for short-circuit protection
- Internal charge/discharge prohibition circuit for added safety
- Function for charging batteries from 0 V
- Low current consumption for energy efficiency
Disadvantages- Does not support battery packs with more than 3 serial cells
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
Shipping fee:
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Shipping option:
DHL, FedEx, EMS, SF Express, and Registered Air MailShipping tracking:
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How to Buy:
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Popular parts of the same kind
- Datasheet: Download QFEM-7758-AF1
- Chipdatas Part: CD89-QFEM-7758-AF1
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/13 17:02 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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We recommend to use bank transfer for large orders to save on handling fees.
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