DV2043S7. Level 2 Smart Charger With Dual-Battery Selector. Product Brief. Features. General Description

Size: px

Start display at page:

Download "DV2043S7. Level 2 Smart Charger With Dual-Battery Selector. Product Brief. Features. General Description"

Regina George
6 years ago
Views:

Product Brief DV04S7 Level Smart Charger With Dual-Battery Selector Features Level Smart Charger evaluation and development board with Dual-Battery Selector Supports System Management Bus

1 Product Brief DV04S7 Level Smart Charger With Dual-Battery Selector Features Level Smart Charger evaluation and development board with Dual-Battery Selector Supports System Management Bus specification and Level Smart Charger specifications rev..0 Supports the Smart Battery Selector specification and handles switching between external DC and one or two battery packs Supports stand-alone or in-system charging Charge voltage regulation range from 0 to 7.4V, current regulation range from 0 to.4a DC input range from 8 to 4V High-efficiency, low-ripple switch-mode design with high-side current sensing For safety, charging is suspended on charging command time-out or maximum temperature Interrupts host on change in selector status (battery or DC removed or replaced) General Description The DV04S7 Smart Charger Development System with Smart Battery Selector provides a development environment for Smart Charger devices compliant with System Management Bus, Smart Charger, and Smart Battery Selector specifications. The unit supports single- or dual-battery configurations. The two-chip design provides stand-alone or in-system charging of SMBuscompliant batteries or dumb batteries under host control. Using a high-efficiency switch-mode regulator, the DV04S7 charges from 0 to.4a and voltage compliance of 0 to 7.4V. The bq054 plus microcontroller high-side current sensing design can be modified to support other voltage and current requirements. Charging begins with a pre-charge qualification phase. The bq054 performs a low-current qualification test to detect batteries that have failed. The bq054 precharges undervoltage batteries for as long as 4 minutes to try to bring the pack up to minimum voltage (8V). If this time expires and the pack voltage is still under 8V, then the DV04S7 indicates a battery fault. The DV04S7, responding to Smart Charger commands, adjusts the current and voltage to the appropriate levels. Oct. 997 C Charging terminates when the battery signifies a fullcharge condition. If maximum charging temperature is exceeded or if communication with the battery is lost, the DV04S7 suspends charging until it receives new charging commands or until temperature returns to allowable levels. The microcontroller communicates with the SMBus and provides the voltage and current scaling to the bq054. The bq054 regulates both current and voltage using an internal PWM and reference circuit. Efficiencies greater than 85% are possible using the DV04S7 design, allowing for low-power dissipation. The DV04S7 design is ideal for in-system charging where high-efficiency is desired. The DV04S7-KT includes one EV00 Intelligent Battery Interface board and Windows-based PC software. The EV00 allows a PC to communicate with the smart battery and smart charger and display the status of each. A full data sheet for this product is available on our web site ( or you may contact the factory for one.

2 DV04S7 Product Brief DV04S7 Board Schematic Oct. 997 C

3 Product Brief DV04S7 DV04S7 Board Schematic (Continued) Oct. 997 C

4 4 0. C8 NF C5 0. C6 0.0 C9 0.0 C7 0PF C4 0.0 C5 00K R 0_OHM R4 00K R 0K R8 0K R9 % 00 R6 % 5K R % 00 R0 % 00 R 0 R4 K R 5 R7 75 R K R4 K R5 VDC K R % W 0.05 R4 SK4DI D5 MMSB D8 % 9.K R4 % K R0 % K R5 DL448 D DL448 D9 FMMT904 Q8 FMMT904 Q7 FMMT904 Q4 FMMT906 Q6 FMMT906 Q 5V 0 C7 0V.0 C FZT948 Q4 4 % 8.7K R6 SK4DI D7 TM ITERM LED LCOM LED ICOMP LED/DSEL TPWM VSS VCC MOD TS SNS VCOMP BAT FLOAT BQ054 U RED D 00uH L 0uH L BCX556 Q5 CHG_VCC V_SET CHG+ I_SET dv04s7/4-8-97/c DV04S7 Board Schematic (Continued) DV04S7 Product Brief Oct. 997 C

5 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ( CRITICAL APPLICATIONS ). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER S RISK. In order to minimize risks associated with the customer s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI s publication of information regarding any third party s products or services does not constitute TI s approval, warranty or endorsement thereof. Copyright 999, Texas Instruments Incorporated

DV2003L1. Fast Charge Development System. Control of On-Board Linear Current Regulator or External Current Source. Features. Connection Descriptions

DV2003L1. Fast Charge Development System. Control of On-Board Linear Current Regulator or External Current Source. Features. Connection Descriptions DV00L Fast Charge Development System Control of On-Board Linear Current Regulator or External Current Source Features bq00 fast-charge control evaluation and development Charge current sourced from an