BQ2057PDGKRG4

Battery Chargers Overview

The BQ2057PDGKRG4 is a discontinued linear charge management integrated circuit designed for single-cell lithium-ion and lithium-polymer batteries. It operates within a supply voltage range of 4.5 V to 15 V and supports a maximum output current of 2 A. The device features an 8-pin VSSOP package with a specified operating temperature range from -20°C to +70°C. It utilizes a programmable constant-current/constant-voltage charging algorithm.

Battery Chargers Feature Summary

• Implements advanced linear charge management for single-cell lithium-ion and lithium-polymer chemistries
• Features AutoComp technology to compensate for system voltage drops during charging
• Provides programmable constant-current and constant-voltage charging profiles
• Includes thermal regulation to manage die temperature under high load conditions

Battery Chargers Applications

• Portable electronic devices requiring single-cell battery charging
• Consumer electronics utilizing lithium-ion or lithium-polymer power sources
• Industrial equipment with low-power battery backup systems

Battery Chargers Procurement Notes

This component is officially obsolete and no longer manufactured by Texas Instruments. Verification of availability is restricted to existing stock held by distributors or third-party suppliers. Buyers must confirm the authenticity and storage history of available units, as lead times are variable and dependent on secondary market inventory levels rather than direct production schedules.

Battery Chargers Selection Notes

Engineers should evaluate alternative components due to the discontinuation status of this part. Selection criteria must account for the specific voltage and current requirements of the target application while ensuring compatibility with the 8-pin VSSOP footprint. Replacement strategies should prioritize parts with verified pin-to-pin compatibility and equivalent thermal performance characteristics to maintain design integrity.

Battery Chargers Part Context

The BQ2057 series represents Texas Instruments' legacy solution for simple, cost-effective linear charging applications. This specific variant belongs to the PDGKR suffix family, indicating the tape-and-reel packaging format within the VSSOP-8 housing. The series was widely adopted in portable consumer electronics before newer generations offered enhanced efficiency and integration capabilities.

Battery Chargers Replacement Considerations

Publicly confirmed substitute part numbers include MCP73843-420I/MS from Microchip Technology. Designers should verify electrical parameter alignment and physical footprint compatibility when transitioning to alternative manufacturers.

Battery Chargers FAQ

What is the maximum supported input voltage for the BQ2057PDGKRG4?

The device supports a maximum supply voltage of 15 V.

Does this IC support dual-cell battery configurations?

No, the BQ2057PDGKRG4 is specifically designed for single-cell lithium-ion and lithium-polymer batteries.