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34674 Datasheet(PDF) 17 Page - Freescale Semiconductor, Inc |
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34674 Datasheet(HTML) 17 Page - Freescale Semiconductor, Inc |
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17 / 26 page  Analog Integrated Circuit Device Data Freescale Semiconductor 17 34674 FUNCTIONAL DESCRIPTION FUNCTIONAL DEVICE OPERATION Figure 19. Equivalent Circuit for the NTC Interface Figure 20. NTC Thermistor Resistance Characteristics Figure 21. Battery Connection Verification Flow Chart + - + - VR EF TEM P CP1 CP2 U nder Tem p R U R S GN D Over Tem p R NTC R R R 2/3VVREF 1/3VVREF TCOLD THOT RCOLD RHOT Resistance Temperature START Set VTRKL to 1.5V Discharge the output with 6mA current for 250ms Set VTRKL back to normal voltage VBAT < VTRKL ? Trickle charge for 250ms VTRKL < VBAT < VRECH ? Set VTRKL back to normal voltage Good connection Bad connection No No Yes Yes Battery Connection Verification Good connection Bad connection |
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