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Seaward Elec SE9450-HF product image
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Seaward Elec SE9450-HFRoHS

Manufacturer
Seaward ElecAsian Brands
MPN
SE9450-HF
LCSC Part #
C2838580
Packaging
WDFN-8-EP(2x2)
Customer #
Key Attributes
Single-cell, linear lithium battery charging IC
Datasheetpdf iconSeaward Elec SE9450-HF
In-Stock: 1,112
1,112 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
1+$ 0.2083$ 0.21
10+$ 0.1649$ 1.65
30+$ 0.1463$ 4.39
100+$ 0.1231$ 12.31
500+$ 0.1128$ 56.40
1,000+$ 0.0915$ 91.50
Standard Packaging3000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Battery Management
ManufacturerSeaward Elec
PackagingWDFN-8-EP(2x2)
FeaturesConstant current charging;Constant voltage charging;Trickle charging;Automatic recharge;Charge termination;Programmable charging current;Overvoltage protection;Battery temperature monitoring;Soft-start;Under-voltage lockout
Operating Temperature-20℃~+85℃
Quiescent Current3uA
0V Battery Charge-
Type of BatteryLithium Battery
Operating Voltage4.5V~25V
The Chip TypeCharging IC
Interface-
Balance Current-
Charge Current - Max1A
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

SE9450 is a complete high-voltage, high-current, single-cell lithium-ion battery linear charger IC featuring constant current/constant voltage operation. It supports a maximum operating voltage of 28V, automatic overvoltage protection at 6.5V, and a charging current of up to 1A.

The internal PMOSFET architecture combined with reverse-charge protection circuitry eliminates the need for an external isolation diode. Thermal feedback automatically adjusts the charging current to limit die temperature during high-power operation or under high ambient temperature conditions. The full-charge voltage is fixed at 4.2V, while the charging current can be externally set via a single resistor. When the battery voltage reaches the full-charge voltage, the charging current gradually decreases; when it drops to 1/10 of the programmed value, SE9450 automatically terminates the charging process.

When the input voltage (AC adapter or USB power supply) is removed, SE9450 automatically enters a low-current state, reducing battery leakage current to below 2uA (typ).

Additional features of the SE9450 include battery temperature monitoring, undervoltage lockout, automatic recharge, and two LED status pins for indicating charge-in-progress and end-of-charge states.

Features

AI Translation
  • Input voltage up to 28V
  • 6.5V input OVP
  • MPPT (Maximum Power Point Tracking)
  • Charge current programmable via external resistor, up to 1A
  • No anti-backflow MOSFET, sense resistor, or isolation diode required
  • CC/CV operation with thermal regulation for maximum charge rate without thermal risk
  • 4.2V preset float voltage with ±1% accuracy
  • Automatic recharge
  • Dual charge status outputs with battery absent and fault indication
  • C/10 charge termination
  • 2.9V trickle charge
  • Soft-start limits inrush current
  • Reverse battery protection
  • Battery temperature monitoring
  • Available in PSOP8, DFN2*2-8 packages

Applications

AI Translation
  • Backup power / power bank
  • Mobile phones, PDAs, GPS devices
  • MP3, MP4 players
  • Digital cameras, electronic dictionaries
  • Portable devices, various chargers