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TEA1102TS Fiches technique(PDF) 10 Page - NXP Semiconductors |
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TEA1102TS Fiches technique(HTML) 10 Page - NXP Semiconductors |
10 / 28 page 1999 Jan 27 10 Philips Semiconductors Preliminary specification Fast charge ICs for NiCd, NiMH, SLA and LiIon TEA1102; TEA1102T; TEA1102TS Fig.3 ttime-out as a function of R23 and PTD with C4 as parameter. handbook, full pagewidth 200 fosc (kHz) 0 0 30 60 90 120 150 ttime-out (min) 180 10 12.5 (R23 min) PTD programming 125 (R23 max) 30 50 70 90 R23 (k Ω) C4 (pF) 110 68 100 150 220 390 560 820 1500 130 MGD280 40 80 120 160 :1 (GND) :2 (n.c.) :4 ( +VS) prefered oscillator range (POD = GND) prefered oscillator range (POD = n.c.) prefered oscillator range (POD = +VS) LED indication With few external components, indication LEDs can be connected to the program pins and the LED pin of the TEA1102x. These program pins change their function from an input to an output pin after a short initialization time at system switch-on or battery insertion. Output pin Vsl enables the external LEDs to be driven and avoids interaction with the programming of the dividers during the initialization period. The applied LEDs indicate: • Protection • Refresh • Fast charge • 100% • No-battery. The LED output pin can also indicate the charging state by one single LED. The indication LED can be connected directly to the LED output. This single LED indicates: • Fast charge (LED on) • 100% or refresh (LED off) • Protection or inhibit (LED floating). The refresh can be indicated by an extra LED connected to pin 4 (PSD). A buzzer can also be driven from the TEA1102x to indicate battery insertion end of refresh or full battery. AD/DA converter When battery full is determined by peak voltage detection, the Vbat voltage is sampled at a rate given by the following equation: (8) The analog value of a Vbat sample is then digitized and stored in a register. On the following sample, the digitized value is converted back to the analog value of Vbat and compared with the ‘new’ Vbat sample. t sampling Vpeak () 2 16 POD × t osc × = |
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Description similaire - TEA1102TS |
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