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BQ29400 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ29400 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page www.ti.com FEATURES FUNCTION APPLICATIONS DESCRIPTION 1 2 3 4 8 7 6 5 VC1 VC2 VC3 GND OUT VDD CD VC4 PW PACKAGE (TOP VIEW) GND OUT VDD CD VC4 VC1 VC3 1 2 VC2 3 4 5 6 7 8 DCT PACKAGE (TOP VIEW) bq29400, bq29400A bq29401, bq29405 SLUS568C – JULY 2003 – REVISED SEPTEMBER 2005 VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Lion BATTERIES (2nd PROTECTION) • 2-, 3-, or 4-Cell Secondary Protection Each cell in a multiple cell pack is compared to an internal reference voltage. If one cell reaches an • Low Power Consumption ICC < 2 µA overvoltage condition, the protection sequence [VCELL(ALL) < V(PROTECT)] begins. The bq2940x device starts charging an • High Accuracy Over Sense Voltage: external capacitor through the CD pin. When the CD – bq29400: 4.35 V ±25 mV pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level. – 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 • 2nd Level Protection in Lion Battery Packs in – Notebook PCs – Portable Instrumentation – Medical and Test Equipment 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. ORDERING INFORMATION PACKAGE TA V(PROTECT) MSSOP (DCT3) SYMBOL TSSOP (PW)(1) SYMBOL 4.35 V bq29400DCT3 CIQ bq29400PW 2400 4.40 V bq29400ADCT3 CIT Not Available - –25 °C to 85°C 4.45 V bq29401DCT3 CIR bq29401PW 2401 4.65 V bq29405DCT3 CIS Not Available - (1) The bq29400, bq29400A, bq29401, and bq29405 are available taped and reeled. Add an R suffix to the device type (e.g., bq29400PWR) to order tape and reel version. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Not Recommended for New Designs: bq29400, bq29400A, bq29405 |
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