ST-828 Schematic ( PDF Datasheet ) - Chips Garden

Teilenummer	ST-828
Beschreibung	NiCd / NiMH / Li-Ion Battery Twin Charge Control IC
Hersteller	Chips Garden
Logo
Gesamt 11 Seiten Available Now!!! ST-828 NiCd / NiMH / Li-Ion Battery Seq. Twin Charge Control IC Main Function General Description  For NiCd / NiMH battery apply constant-current (C.C.) charge technique and provide -∆V/∆t, Timer, V-Max, terminate- condition detection Apply trickle charge current after battery was full-charged.  For Li-Ion battery apply constant-voltage (C.V.) charge technique to ensure safety and prevent battery from damage.  Provide battery chemistry type input selection, allow system to identify battery type via proper interface circuit.  Support LED/LCD display.  Provide battery power indicator (LCD mode) to illustrate the battery power in percentage.  Support battery discharge function.  16 Pin SOP Package ST-828 has the most simplest and economic way by using the LM339 associate with advance software program to achieve the goal of constant-current and constant-voltagecontrol. Especially suitable for the up-to-date Li-Ion battery charge control and MiMH/NiCd battery are also available. ST-828 for the phone-set which built-in charge-control function itself, provide a simplest solution to detect the charge status of phone-set. Basically, the phone-set will has higher priority to charge than the battery if both in their own slot. System will monitor the charging status of phone-set and detect the "charge-terminate" situation of phone-set and then transfer the charge process to the battery. ST-828 support LED/LCD indicators could illustrate the condition during charging (Red-LED for Rapid-Charge, Green-LED for Full-Charged in LED display mode, and 25%, 50%, 75%, 100% for charging power indicator in LCD display mode). ST-828 is the best cost performance IC to achieve the goal of higher quality and lower the cost of twin charger solution. Display Reference LCD Display POWERLOGO PH 25% 50% 75% 100% LED Display RGRG /AFAST /AFULL /BFAST /BFULL All information may subject to change without notice, Contact us for latest Information !!! (C) 1999 Chips Garden Enterprise Co., Ltd. Page 1 of 2 March 13, 2000 Pin Functions and Descriptions VCC 47K CHB (PULSE) + 470K ST-828 A+ LM339 R1 100K 101P 104P IRS Phone A- VRS RS Battery Charge Control Circuit VFULL R2 Since the different model of phone-sets draws different current when it reach the full-charged point. Users should adjust the set point (VFULL) in order to detect the status when phone-set was full-charged. Phone-set Full Charged Current : IRS=VRS/RS=VFULL/RS=VCC*[R2/(R1+R2)] RS [Pulse Charging Control Phone-set] [Current Charging Control Phone-set] VRS VRS VFULL VCC Phone-set Full-Charged VFULL t VCC Phone-set Full-Charged t CHB (PULSE) CHB (PULSE) tt (FIG.1) Charger detect Full-Charged (Fig.2) Charger detect Full-Charged (1). /PULSE=Low indicate the phone was in fast-charge stage. (2). /PULSE=Hi/Low bouncing indicate the phone-set has been or nearly full-charged. System will analysis the charging pattern to determine the phone-set was in full-charged status or not (3). /PULSE=Hi and /INUSE=H indicate phone-set has been removed from slot. Caution : (1) ST-828 only support the phone-set which built-in with charge control function itself if it charge the phone-set without charge control function will damage the phone-set. (2) Phone-set charge using pulse control charge technique, the VFULL current set point should be larger than the current draws on phone-set when phone-set was in charge-off- duty. All information may subject to change, Contact us for latest information !!! (C) 1999 Chips Garden Enterprise Co., Ltd. Page 4 of 7 March 13, 2000 6 Page
Seiten	Gesamt 11 Seiten
PDF Download	[ ST-828 Schematic.PDF ]

Link teilen

Besondere Datenblatt

Teilenummer	Beschreibung	Hersteller
ST-828	NiCd / NiMH / Li-Ion Battery Twin Charge Control IC	Chips Garden

Teilenummer	Beschreibung	Hersteller
CD40175BC	Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.	Fairchild Semiconductor
KTD1146	EPITAXIAL PLANAR NPN TRANSISTOR.	KEC