BQ29400屬于集成電路（IC）的電池管理。由美國德州儀器公司制造生產(chǎn)的BQ29400電池管理電池管理 PMIC（電源管理集成電路）系列產(chǎn)品可用于電池相關(guān)的監(jiān)測和控制功能，包括身份驗(yàn)證、電池平衡、狀態(tài)監(jiān)測、電量計(jì)量、電源選擇、短路保護(hù)、過壓和欠壓保護(hù)等等。請注意，雖然該系列中的某些產(chǎn)品可能包括電池充電功能，但將充電功能作為主要功能的產(chǎn)品是單獨(dú)分類的。

FEATURES

· 2-, 3-, or 4-Cell Secondary Protection

· Low Power Consumption ICC < 2 μA

[VCELL(ALL) < V(PROTECT)]

· High Accuracy Over Sense Voltage:

– bq29400: 4.35 V ±25 mV

– bq29400A: 4.40 V ±25 mV

– bq29401: 4.45 V ±25 mV

– bq29405: 4.65 V ±25 mV

· Prefixed Protection Threshold Voltage

· Programmable Delay Time

· High Power Supply Ripple Rejection

· Stable During Pulse Charge Operation

APPLICATIONS

· 2nd Level Protection in Lion Battery Packs in

– Notebook PCs

– Portable Instrumentation

– Medical and Test Equipment

DESCRIPTION

The bq29400, bq29400A, bq29401, and bq29405 are

BiCMOS secondary protection ICs for 2-, 3-, or 4-cell

Lithium-Ion battery packs that incorporate a

high-accuracy precision over voltage detection circuit.

They include a programmable delay circuit for over

voltage detection time.

FUNCTION

Each cell in a multiple cell pack is compared to an

internal reference voltage. If one cell reaches an

overvoltage condition, the protection sequence

begins. The bq2940x device starts charging an external capacitor through the CD pin. When the CD

pin voltage reaches 1.2 V, the OUT pin changes from

a low level to a high level.