BQ2004
- Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
- Hysteretic PWM switch-mode current regulation or gated control of an external regulator
- Easily integrated into systems or used as a stand-alone charger
- Pre-charge qualification of temperature and voltage
- Configurable, direct LED outputs display battery and charge status
- Fast-charge termination by
V, maximum voltage, maximum temperature, and maximum time - Optional top-off charge and pulsed current maintenance charging
- Logic-level controlled low-power mode (< 5µA standby current)
The bq2004 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.
Integration of closed-loop current control circuitry allows the bq2004 to be the basis of a cost-effective solution for stand-alone and system integrated chargers for batteries of one or more cells.
Switch-activated discharge-before charge allows bq2004-based chargers to support battery conditioning and capacity determination.
High-efficiency power conversion is accomplished using the bq2004 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2004 may alternatively be used to gate an externally regulated charging current.
Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.
Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:
- Rate of temperature time (t)
- Peak voltage detection (PVD)
- Negative delta voltage (-V)
- Maximum voltage
- Maximum temperature
- Maximum time
After fast charge, optional top-off and pulsed current maintenance phases are available.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | Fast-Charge IC datasheet (Rev. B) | 2005/04/19 | |
| User guide | DV2004S1/ES1/HS1 Fast Charge Dev System Control of On-Board P-FET S-M Reg (Rev. A) | 2002/08/30 | ||
| User guide | DV2004L1 Fast Charge Development System Control of PNP Power Transistor | 1999/09/05 | ||
| Application note | High-Side Current Sensing with Benchmarq's Fast-Charge Control ICs | 1999/09/05 | ||
| Application note | Using NiMH and Li-Ion Batteries in Portable Applications | 1999/09/05 |
설계 및 개발
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| PDIP (N) | 16 | Ultra Librarian |
| SOIC (D) | 16 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치