Switch-mode NiCd/NiMH Battery Charger W/Negative DV, Peak Voltage Detection, DT/dt Termination

The BQ2004E and BQ2004H Fast Charge ICs provide 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 BQ2004E H-based chargers to support battery conditioning and capacity determination.
High-efficiency power conversion is accomplished using the BQ2004E H as a hysteretic PWM Controller for switch-mode regulation of the charging current. The BQ2004E H 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 rise (T/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 with appropriate Display mode selections are available.
The BQ2004H differs from the BQ2004E only in that fast charge, hold-off, and top-off time units have been scaled up by a factor of two, and the BQ2004H provides different Display selections. Timing differences between the two ICs are illustrated in Table 1. Display differences are shown in Table 2.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
BQ2004ESNG4 Texas Instruments Switch-mode NiCd/NiMH Battery Charger w/Negative dV, Peak Voltage Detection, dT/dt Termination 16-SOIC -20 to 70
BQ2004EPNG4 Texas Instruments Switch-mode NiCd/NiMH battery charger w/negative dV, peak voltage detection, dT/dt termination 16-PDIP -20 to 70
BQ2004ESN Texas Instruments Switch-mode NiCd/NiMH battery charger w/negative dV, peak voltage detection, dT/dt termination 16-SOIC -20 to 70
BQ2004ESNTRG4 Texas Instruments Switch-mode NiCd/NiMH battery charger w/negative dV, peak voltage detection, dT/dt termination 16-SOIC -20 to 70
BQ2004ESNTR Texas Instruments Switch-mode NiCd/NiMH battery charger w/negative dV, peak voltage detection, dT/dt termination 16-SOIC -20 to 70
BQ2004EPN Texas Instruments Switch-mode NiCd/NiMH battery charger w/negative dV, peak voltage detection, dT/dt termination 16-PDIP -20 to 70
BQ2004E 's PackagesBQ2004E 's pdf datasheet
BQ2004EPN PDIP
BQ2004EPNG4 PDIP
BQ2004ESN SOIC
BQ2004ESNG4 SOIC
BQ2004ESNTR SOIC
BQ2004ESNTRG4 SOIC




BQ2004E Pinout, Pinouts
BQ2004E pinout,Pin out
This is one package pinout of BQ2004E,If you need more pinouts please download BQ2004E's pdf datasheet.

BQ2004E Application circuits
BQ2004E circuits
This is one application circuit of BQ2004E,If you need more circuits,please download BQ2004E's pdf datasheet.


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