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FM FM4057S52RoHS

Manufacturer
FMAsian Brands
MPN
FM4057S52
LCSC Part #
C841288
Packaging
SOT-23-5
Customer #
Key Attributes
Single-cell lithium battery linear charging chip with a withstand voltage of 32V
Datasheetpdf iconFM FM4057S52
In-Stock: 36,135
36,135 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
5+$ 0.0573$ 0.29
50+$ 0.0502$ 2.51
150+$ 0.0466$ 6.99
500+$ 0.044$ 22.00
3,000+$ 0.0419$ 125.70
6,000+$ 0.0408$ 244.80
Standard Packaging3000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Battery Management
ManufacturerFM
PackagingSOT-23-5
Features-
Operating Temperature-40℃~+85℃
Quiescent Current0uA
0V Battery Charge-
Type of BatteryLithium Battery
Operating Voltage4.6V~32V
The Chip TypeCharging IC
Interface-
Balance Current-
Charge Current - Max1A
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Additional Information

TypeDetails
Minimum5
Multiple5
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

FM4057 is a single-cell lithium battery linear charger IC combining high integration with high reliability, accepting input power from either an AC adapter or a USB port. When the power source is removed, FM4057 enters sleep mode. The FM4057 charging system integrates three control loops — constant current, constant voltage, and constant temperature — delivering superior charging performance.

FM4057 optimizes the charging process through a control algorithm encompassing pre-charge, fast-charge, and constant-voltage modes. Once fully charged, the device maintains constant-voltage mode to ensure the battery remains at full charge at all times. Charge current is programmable via a single external resistor, with a maximum configurable charge current of 1A. An internal thermal feedback circuit regulates die temperature to ensure the battery is charged at the optimal rate across all available ambient temperatures. In practice, when charging begins, the die temperature rises, causing the charge current to decrease proportionally with the temperature increase; once the internal temperature loop reaches steady state, the charge current stabilizes, achieving isothermal charging. The VIN pin supports a maximum input voltage of 32V. FM4057 also integrates comprehensive protection features: input overvoltage, input undervoltage, output overvoltage, output short-circuit, and over-temperature protection.

FM4057 is available in four package options: SOT23-6, SOT23-5, ESOP8, and DFN6.

Features

AI Translation
  • Input voltage range: 4.6V~32V
  • Input overvoltage protection
  • FM4057 overvoltage protection voltage: 6.5V
  • FM4057B supports high-voltage charging
  • External resistor-adjustable charge current, up to 1A
  • Constant-temperature charging with automatic current adjustment on over-temperature
  • Supports 4.2V, 4.35V, 4.4V battery types
  • LED charge status indication, dual-color LED support
  • Built-in MOSFET with reverse current blocking
  • Trickle/CC/CV output overcurrent, overvoltage, and short-circuit protection
  • Input overvoltage and undervoltage protection
  • OTP thermal protection
  • 4KV ESD

Applications

AI Translation
  • Single-cell lithium battery charging