SG Micro Corp

SGM4056 High Input Voltage Charger

GENERAL DESCRIPTION

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.


PIN CONFIGURATIONS


FEATURES

• 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

APPLICATIONS

Mobile Phones
Blue-Tooth Devices
PDAs
MP3 Players
Stand-Alone Chargers
Other Handheld Devices


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM4056-6.8YTDB8G/TR Production TDFN-3×3-8L 8 Y -40℃ to +85℃ Samples
SGM4056-6.8YTDC8G/TR Production TDFN-2×3-8L 8 Y -40℃ to +85℃ Samples
SGM4056-6.8YTDE8G/TR Production TDFN-2×2-8L 8 Y -40℃ to +85℃ Samples
SGM4056-6.8YPS8G/TR Production SOIC-8 (Exposed Pad) 8 Y -40℃ to +85℃ Samples
SGM4056-10.5YTDB8G/TR Production TDFN-3×3-8L 8 Y -40℃ to +85℃ Samples
SGM4056-10.5YTDC8G/TR Production TDFN-2×3-8L 8 Y -40℃ to +85℃ Samples
SGM4056-10.5YTDE8G/TR Production TDFN-2×2-8L 8 Y -40℃ to +85℃ Samples
SGM4056-10.5YPS8G/TR Production SOIC-8 (Exposed Pad) 8 Y -40℃ to +85℃ Samples

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