The SGM4056 is a cost-effective, fully integrated high input voltage single-cell Li-Ion battery charger. The charger uses a CC/CV charge profile required by Li-Ion battery. The charger accepts an input voltage up to 26.5V but is disabled when the input voltage exceeds the OVP threshold, typically 6.8V (SGM4056-6.8) or 10.5V (SGM4056-10.5), to prevent excessive power dissipation. The 26.5V rating eliminates the over-voltage protection circuit required in a low input voltage charger.
The charge current and the end-of-charge (EOC) current are programmable with external resistors. When the battery voltage is lower than typically 2.55V, the charger preconditions the battery with typically 18% of the programmed charge current. When the charge current reduces to the programmable EOC current level during the CV charge phase, an EOC indication is provided by the CHG pin, which is an open-drain output. An internal thermal foldback function protects the charger from any thermal failure.
Two indication pins (PPR and CHG) allow simple interface to a microprocessor or LEDs. When no adapter is attached or when disabled, the charger draws less than 1μA leakage current from the battery.
The SGM4056 is available in Green TDFN-3×3-8L, TDFN-2×3-8L, TDFN-2×2-8L and SOIC-8 (Exposed Pad) packages and is rated over the -40℃ to +85℃ temperature range.
Complete Charger for Single-Cell Li-Ion or Polymer Batteries
Integrated Pass Element and Current Sensor
No External Blocking Diode Required
Low Component Count and Cost
Programmable Charge Current
Programmable End-of-Charge Current
Charge Current Thermal Foldback for Thermal Protection
2.55V Trickle Charge Threshold
6.8V Input Over-Voltage Protection for SGM4056-6.8
10.5V Input Over-Voltage Protection for SGM4056-10.5
26.5V Maximum Voltage for the Power Input
Power Presence and Charge Indications
Less than 1μA Leakage Current off the Battery When No Input Power Attached or Charger Disabled
Available in Green TDFN-3×3-8L, TDFN-2×3-8L, TDFN-2×2-8L and SOIC-8 (Exposed Pad) Packages
Other Handheld Devices
|Part Number||Status||Package||Pins||Pb-Free||Temp Range|
|SGM4056-6.8YTDB8G/TR||Production||TDFN-3×3-8L||8||Y||-40℃ to +85℃|
|SGM4056-6.8YTDC8G/TR||Production||TDFN-2×3-8L||8||Y||-40℃ to +85℃|
|SGM4056-6.8YTDE8G/TR||Production||TDFN-2×2-8L||8||Y||-40℃ to +85℃|
|SGM4056-6.8YPS8G/TR||Production||SOIC-8 (Exposed Pad)||8||Y||-40℃ to +85℃|
|SGM4056-10.5YTDB8G/TR||Production||TDFN-3×3-8L||8||Y||-40℃ to +85℃|
|SGM4056-10.5YTDC8G/TR||Production||TDFN-2×3-8L||8||Y||-40℃ to +85℃|
|SGM4056-10.5YTDE8G/TR||Production||TDFN-2×2-8L||8||Y||-40℃ to +85℃|
|SGM4056-10.5YPS8G/TR||Production||SOIC-8 (Exposed Pad)||8||Y||-40℃ to +85℃|