Texas Instruments bq24010/2 manual Background, Performance Specification Summary

Background

1.1 Background

The bqTINY series are highly integrated Li-Ion and Li-Pol linear charge management devices targeted at space limited portable applications. In a small package, the bqTINY series offer integrated PowerFET and current sensor, reverse blocking diode, high accuracy current and voltage regulation, charge status, and charge termination.

The bqTINY charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated on the basis of minimum current. An internal charge timer provides backup safety for charge termination. The bqTINY automatically restarts the charge if the battery voltage falls below an internal threshold. The bqTINY automatically enters sleep mode when VCC supply is removed.

In addition to the standard features, different versions of the bqTINY offer a multitude of additional features. These include temperature-sensing input for detecting hot or cold battery packs, power good (PG) output indicating the presence of the ac adapter, a TTL-level charge enable input (CE) to disable or enable the charge process, and a TTL-level timer and termination-enable (TTE) input to disable or enable the fast-charge timer and charge termination.

1.2 Performance Specification Summary

This section summarizes the performance specifications of the EVM. Table 1–1 gives the performance specifications of the EVM.

Table 1–1. Performance Specification Summary

Specification	Test Conditions	Min			Typ	Max	Units
Input dc voltage, V		V	REG	+0.5	5.0	5.2†	V
I(DC)
Battery charge current, IO(CHG)	See note					0.7†	A
Power dissipation	(V(DC+) –V(BAT+))*I(CHG)					1.5	W

†This input voltage maximum is a function of the maximum allowable power dissipation on the IC. The current level is pro- grammed for 0.7 amps. If the programmed charge is changed, then the maximum input voltage needs to be adjusted. PmaxIC = 1.5 Watt = ICHG(VDC+ – VBAT+).

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